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| gitHub |
| <span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></nav> <ul class="sidebar-links"><li><section class="sidebar-group depth-0"><p class="sidebar-heading"><span>IoTDB User Guide (In progress)</span> <!----></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>IoTDB Introduction</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Quick Start</span> <span 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class="sidebar-link">JDBC</a></li><li><a href="/UserGuide/Master/API/Programming-Java-Native-API.html" aria-current="page" class="active sidebar-link">Java Native API</a></li><li><a href="/UserGuide/Master/API/Programming-Python-Native-API.html" class="sidebar-link">Python Native API</a></li><li><a href="/UserGuide/Master/API/Programming-Cpp-Native-API.html" class="sidebar-link">C++ Native API</a></li><li><a href="/UserGuide/Master/API/Programming-Go-Native-API.html" class="sidebar-link">Go Native API</a></li><li><a href="/UserGuide/Master/API/Programming-TsFile-API.html" class="sidebar-link">TsFile API</a></li></ul></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Advanced Features</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Communication Service Protocol</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>System Tools</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Collaboration of Edge and Cloud</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Ecosystem Integration</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Cluster Setup</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>FAQ</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Appendix</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Comparison with TSDBs</span> <span class="arrow right"></span></p> <!----></section></li></ul> </aside> <main class="page"> <div class="content content__default"><h2 id="java-native-api"><a href="#java-native-api" class="header-anchor">#</a> Java Native API</h2> <h3 id="dependencies"><a href="#dependencies" class="header-anchor">#</a> Dependencies</h3> <ul><li>JDK >= 1.8</li> <li>Maven >= 3.6</li></ul> <h3 id="installation"><a href="#installation" class="header-anchor">#</a> Installation</h3> <p>In root directory:</p> <blockquote><p>mvn clean install -pl session -am -DskipTests</p></blockquote> <h3 id="using-iotdb-java-native-api-with-maven"><a href="#using-iotdb-java-native-api-with-maven" class="header-anchor">#</a> Using IoTDB Java Native API with Maven</h3> <div class="language-xml line-numbers-mode"><pre class="language-xml"><code><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>dependencies</span><span class="token punctuation">></span></span> |
| <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>dependency</span><span class="token punctuation">></span></span> |
| <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>groupId</span><span class="token punctuation">></span></span>org.apache.iotdb<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>groupId</span><span class="token punctuation">></span></span> |
| <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>artifactId</span><span class="token punctuation">></span></span>iotdb-session<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>artifactId</span><span class="token punctuation">></span></span> |
| <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>version</span><span class="token punctuation">></span></span>0.13.0-SNAPSHOT<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>version</span><span class="token punctuation">></span></span> |
| <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>dependency</span><span class="token punctuation">></span></span> |
| <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>dependencies</span><span class="token punctuation">></span></span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br></div></div><h3 id="native-apis"><a href="#native-apis" class="header-anchor">#</a> Native APIs</h3> <p>Here we show the commonly used interfaces and their parameters in the Native API:</p> <ul><li>Initialize a Session</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Session</span><span class="token punctuation">(</span><span class="token class-name">String</span> host<span class="token punctuation">,</span> <span class="token keyword">int</span> rpcPort<span class="token punctuation">)</span> |
| |
| <span class="token class-name">Session</span><span class="token punctuation">(</span><span class="token class-name">String</span> host<span class="token punctuation">,</span> <span class="token class-name">String</span> rpcPort<span class="token punctuation">,</span> <span class="token class-name">String</span> username<span class="token punctuation">,</span> <span class="token class-name">String</span> password<span class="token punctuation">)</span> |
| |
| <span class="token class-name">Session</span><span class="token punctuation">(</span><span class="token class-name">String</span> host<span class="token punctuation">,</span> <span class="token keyword">int</span> rpcPort<span class="token punctuation">,</span> <span class="token class-name">String</span> username<span class="token punctuation">,</span> <span class="token class-name">String</span> password<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br></div></div><ul><li>Open a Session</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Session</span><span class="token punctuation">.</span><span class="token keyword">open</span><span class="token punctuation">(</span><span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><ul><li>Close a Session</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Session</span><span class="token punctuation">.</span><span class="token function">close</span><span class="token punctuation">(</span><span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><ul><li>Set storage group</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">setStorageGroup</span><span class="token punctuation">(</span><span class="token class-name">String</span> storageGroupId<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><ul><li>Delete one or several storage groups</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">deleteStorageGroup</span><span class="token punctuation">(</span><span class="token class-name">String</span> storageGroup<span class="token punctuation">)</span> |
| <span class="token keyword">void</span> <span class="token function">deleteStorageGroups</span><span class="token punctuation">(</span><span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> storageGroups<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><ul><li>Create one or multiple timeseries</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">createTimeseries</span><span class="token punctuation">(</span><span class="token class-name">String</span> path<span class="token punctuation">,</span> <span class="token class-name">TSDataType</span> dataType<span class="token punctuation">,</span> |
| <span class="token class-name">TSEncoding</span> encoding<span class="token punctuation">,</span> <span class="token class-name">CompressionType</span> compressor<span class="token punctuation">,</span> <span class="token class-name">Map</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">String</span><span class="token punctuation">></span></span> props<span class="token punctuation">,</span> |
| <span class="token class-name">Map</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">String</span><span class="token punctuation">></span></span> tags<span class="token punctuation">,</span> <span class="token class-name">Map</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">String</span><span class="token punctuation">></span></span> attributes<span class="token punctuation">,</span> <span class="token class-name">String</span> measurementAlias<span class="token punctuation">)</span> |
| |
| <span class="token keyword">void</span> <span class="token function">createMultiTimeseries</span><span class="token punctuation">(</span><span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> paths<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">TSDataType</span><span class="token punctuation">></span></span> dataTypes<span class="token punctuation">,</span> |
| <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">TSEncoding</span><span class="token punctuation">></span></span> encodings<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">CompressionType</span><span class="token punctuation">></span></span> compressors<span class="token punctuation">,</span> |
| <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Map</span><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">String</span><span class="token punctuation">></span><span class="token punctuation">></span></span> propsList<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Map</span><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">String</span><span class="token punctuation">></span><span class="token punctuation">></span></span> tagsList<span class="token punctuation">,</span> |
| <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Map</span><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">String</span><span class="token punctuation">></span><span class="token punctuation">></span></span> attributesList<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> measurementAliasList<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br></div></div><ul><li>Create aligned timeseries</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>void createAlignedTimeseries(String prefixPath, List<String> measurements, |
| List<TSDataType> dataTypes, List<TSEncoding> encodings, |
| CompressionType compressor, List<String> measurementAliasList); |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><p>Attention: Alias of measurements are <strong>not supported</strong> currently.</p> <ul><li>Delete one or several timeseries</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">deleteTimeseries</span><span class="token punctuation">(</span><span class="token class-name">String</span> path<span class="token punctuation">)</span> |
| <span class="token keyword">void</span> <span class="token function">deleteTimeseries</span><span class="token punctuation">(</span><span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> paths<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><ul><li>Delete data before or equal to a timestamp of one or several timeseries</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">deleteData</span><span class="token punctuation">(</span><span class="token class-name">String</span> path<span class="token punctuation">,</span> <span class="token keyword">long</span> time<span class="token punctuation">)</span> |
| <span class="token keyword">void</span> <span class="token function">deleteData</span><span class="token punctuation">(</span><span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> paths<span class="token punctuation">,</span> <span class="token keyword">long</span> time<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><ul><li>Insert a Record，which contains multiple measurement value of a device at a timestamp. Without type info the server has to do type inference, which may cost some time</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">insertRecord</span><span class="token punctuation">(</span><span class="token class-name">String</span> prefixPath<span class="token punctuation">,</span> <span class="token keyword">long</span> time<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> measurements<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> values<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><ul><li>Insert a Tablet，which is multiple rows of a device, each row has the same measurements</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">insertTablet</span><span class="token punctuation">(</span><span class="token class-name">Tablet</span> tablet<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><ul><li>Insert multiple Tablets</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">insertTablets</span><span class="token punctuation">(</span><span class="token class-name">Map</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">Tablet</span><span class="token punctuation">></span></span> tablet<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><ul><li>Insert multiple Records. Without type info the server has to do type inference, which may cost some time</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">insertRecords</span><span class="token punctuation">(</span><span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> deviceIds<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Long</span><span class="token punctuation">></span></span> times<span class="token punctuation">,</span> |
| <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">List</span><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span><span class="token punctuation">></span></span> measurementsList<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">List</span><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span><span class="token punctuation">></span></span> valuesList<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><ul><li>Insert a Record, which contains multiple measurement value of a device at a timestamp. With type info the server has no need to do type inference, which leads a better performance</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">insertRecord</span><span class="token punctuation">(</span><span class="token class-name">String</span> deviceId<span class="token punctuation">,</span> <span class="token keyword">long</span> time<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> measurements<span class="token punctuation">,</span> |
| <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">TSDataType</span><span class="token punctuation">></span></span> types<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Object</span><span class="token punctuation">></span></span> values<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><ul><li>Insert multiple Records. With type info the server has no need to do type inference, which leads a better performance</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">insertRecords</span><span class="token punctuation">(</span><span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> deviceIds<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Long</span><span class="token punctuation">></span></span> times<span class="token punctuation">,</span> |
| <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">List</span><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span><span class="token punctuation">></span></span> measurementsList<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">List</span><span class="token punctuation"><</span><span class="token class-name">TSDataType</span><span class="token punctuation">></span><span class="token punctuation">></span></span> typesList<span class="token punctuation">,</span> |
| <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">List</span><span class="token punctuation"><</span><span class="token class-name">Object</span><span class="token punctuation">></span><span class="token punctuation">></span></span> valuesList<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>Insert multiple Records that belong to the same device. |
| With type info the server has no need to do type inference, which leads a better performance</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">insertRecordsOfOneDevice</span><span class="token punctuation">(</span><span class="token class-name">String</span> deviceId<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Long</span><span class="token punctuation">></span></span> times<span class="token punctuation">,</span> |
| <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">List</span><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span><span class="token punctuation">></span></span> measurementsList<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">List</span><span class="token punctuation"><</span><span class="token class-name">TSDataType</span><span class="token punctuation">></span><span class="token punctuation">></span></span> typesList<span class="token punctuation">,</span> |
| <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">List</span><span class="token punctuation"><</span><span class="token class-name">Object</span><span class="token punctuation">></span><span class="token punctuation">></span></span> valuesList<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>Raw data query. Time interval include startTime and exclude endTime</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">SessionDataSet</span> <span class="token function">executeRawDataQuery</span><span class="token punctuation">(</span><span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> paths<span class="token punctuation">,</span> <span class="token keyword">long</span> startTime<span class="token punctuation">,</span> <span class="token keyword">long</span> endTime<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><ul><li>Execute query statement</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">SessionDataSet</span> <span class="token function">executeQueryStatement</span><span class="token punctuation">(</span><span class="token class-name">String</span> sql<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><ul><li>Execute non query statement</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">executeNonQueryStatement</span><span class="token punctuation">(</span><span class="token class-name">String</span> sql<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><h3 id="native-apis-for-profiling-network-cost"><a href="#native-apis-for-profiling-network-cost" class="header-anchor">#</a> Native APIs for profiling network cost</h3> <ul><li>Test the network and client cost of insertRecords. This method NOT insert data into database and server just return after accept the request, this method should be used to test other time cost in client</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">testInsertRecords</span><span class="token punctuation">(</span><span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> deviceIds<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Long</span><span class="token punctuation">></span></span> times<span class="token punctuation">,</span> |
| <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">List</span><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span><span class="token punctuation">></span></span> measurementsList<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">List</span><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span><span class="token punctuation">></span></span> valuesList<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><p>or</p> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">testInsertRecords</span><span class="token punctuation">(</span><span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> deviceIds<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Long</span><span class="token punctuation">></span></span> times<span class="token punctuation">,</span> |
| <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">List</span><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span><span class="token punctuation">></span></span> measurementsList<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">List</span><span class="token punctuation"><</span><span class="token class-name">TSDataType</span><span class="token punctuation">></span><span class="token punctuation">></span></span> typesList<span class="token punctuation">,</span> |
| <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">List</span><span class="token punctuation"><</span><span class="token class-name">Object</span><span class="token punctuation">></span><span class="token punctuation">></span></span> valuesList<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>Test the network and client cost of insertRecordsOfOneDevice. |
| This method NOT insert data into database and server just return after accept the request, |
| this method should be used to test other time cost in client</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">testInsertRecordsOfOneDevice</span><span class="token punctuation">(</span><span class="token class-name">String</span> deviceId<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Long</span><span class="token punctuation">></span></span> times<span class="token punctuation">,</span> |
| <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">List</span><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span><span class="token punctuation">></span></span> measurementsList<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">List</span><span class="token punctuation"><</span><span class="token class-name">TSDataType</span><span class="token punctuation">></span><span class="token punctuation">></span></span> typesList<span class="token punctuation">,</span> |
| <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">List</span><span class="token punctuation"><</span><span class="token class-name">Object</span><span class="token punctuation">></span><span class="token punctuation">></span></span> valuesList<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>Test the network and client cost of insertRecord. This method NOT insert data into database and server just return after accept the request, this method should be used to test other time cost in client</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">testInsertRecord</span><span class="token punctuation">(</span><span class="token class-name">String</span> deviceId<span class="token punctuation">,</span> <span class="token keyword">long</span> time<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> measurements<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> values<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>or</p> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">testInsertRecord</span><span class="token punctuation">(</span><span class="token class-name">String</span> deviceId<span class="token punctuation">,</span> <span class="token keyword">long</span> time<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> measurements<span class="token punctuation">,</span> |
| <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">TSDataType</span><span class="token punctuation">></span></span> types<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Object</span><span class="token punctuation">></span></span> values<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><ul><li>Test the network and client cost of insertTablet. This method NOT insert data into database and server just return after accept the request, this method should be used to test other time cost in client</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">testInsertTablet</span><span class="token punctuation">(</span><span class="token class-name">Tablet</span> tablet<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><h3 id="coding-examples"><a href="#coding-examples" class="header-anchor">#</a> Coding Examples</h3> <p>To get more information of the following interfaces, please view session/src/main/java/org/apache/iotdb/session/Session.java</p> <p>The sample code of using these interfaces is in example/session/src/main/java/org/apache/iotdb/SessionExample.java，which provides an example of how to open an IoTDB session, execute a batch insertion.</p> <h3 id="session-pool-for-native-api"><a href="#session-pool-for-native-api" class="header-anchor">#</a> Session Pool for Native API</h3> <p>We provide a connection pool (`SessionPool) for Native API. |
| Using the interface, you need to define the pool size.</p> <p>If you can not get a session connection in 60 seconds, there is a warning log but the program will hang.</p> <p>If a session has finished an operation, it will be put back to the pool automatically. |
| If a session connection is broken, the session will be removed automatically and the pool will try |
| to create a new session and redo the operation.</p> <p>For query operations:</p> <ol><li>When using SessionPool to query data, the result set is <code>SessionDataSetWrapper</code>;</li> <li>Given a <code>SessionDataSetWrapper</code>, if you have not scanned all the data in it and stop to use it, |
| you have to call <code>SessionPool.closeResultSet(wrapper)</code> manually;</li> <li>When you call <code>hasNext()</code> and <code>next()</code> of a <code>SessionDataSetWrapper</code> and there is an exception, then |
| you have to call <code>SessionPool.closeResultSet(wrapper)</code> manually;</li> <li>You can call <code>getColumnNames()</code> of <code>SessionDataSetWrapper</code> to get the column names of query result;</li></ol> <p>Examples: <code>session/src/test/java/org/apache/iotdb/session/pool/SessionPoolTest.java</code></p> <p>Or <code>example/session/src/main/java/org/apache/iotdb/SessionPoolExample.java</code></p> <p>For examples of aligned timeseries and device template, you can refer to <code>example/session/src/main/java/org/apache/iotdb/AlignedTimeseriesSessionExample.java</code></p> <h3 id="new-interfaces"><a href="#new-interfaces" class="header-anchor">#</a> New Interfaces</h3> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token keyword">open</span><span class="token punctuation">(</span><span class="token keyword">boolean</span> enableRPCCompression<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>Open a session, with a parameter to specify whether to enable RPC compression. |
| Please pay attention that this RPC compression status of client must comply with the status of IoTDB server</p> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">insertRecord</span><span class="token punctuation">(</span><span class="token class-name">String</span> deviceId<span class="token punctuation">,</span> <span class="token keyword">long</span> time<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> measurements<span class="token punctuation">,</span> |
| <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">TSDataType</span><span class="token punctuation">></span></span> types<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Object</span><span class="token punctuation">></span></span> values<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><p>Insert one record, in a way that user has to provide the type information of each measurement, which is different from the original insertRecord() interface. |
| The values should be provided in their primitive types. This interface is more proficient than the one without type parameters.</p> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">insertRecords</span><span class="token punctuation">(</span><span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> deviceIds<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Long</span><span class="token punctuation">></span></span> times<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">List</span><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span><span class="token punctuation">></span></span> measurementsList<span class="token punctuation">,</span> |
| <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">List</span><span class="token punctuation"><</span><span class="token class-name">TSDataType</span><span class="token punctuation">></span><span class="token punctuation">></span></span> typesList<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">List</span><span class="token punctuation"><</span><span class="token class-name">Object</span><span class="token punctuation">></span><span class="token punctuation">></span></span> valuesList<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><p>Insert multiple records with type parameters. This interface is more proficient than the one without type parameters.</p> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">insertTablet</span><span class="token punctuation">(</span><span class="token class-name">Tablet</span> tablet<span class="token punctuation">,</span> <span class="token keyword">boolean</span> sorted<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>An additional insertTablet() interface that providing a "sorted" parameter indicating if the tablet is in order. A sorted tablet may accelerate the insertion process.</p> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">insertTablets</span><span class="token punctuation">(</span><span class="token class-name">Map</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">Tablet</span><span class="token punctuation">></span></span> tablets<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>A new insertTablets() for inserting multiple tablets.</p> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">insertTablets</span><span class="token punctuation">(</span><span class="token class-name">Map</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">Tablet</span><span class="token punctuation">></span></span> tablets<span class="token punctuation">,</span> <span class="token keyword">boolean</span> sorted<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>insertTablets() with an additional "sorted" parameter.</p> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">testInsertRecord</span><span class="token punctuation">(</span><span class="token class-name">String</span> deviceId<span class="token punctuation">,</span> <span class="token keyword">long</span> time<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> measurements<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">TSDataType</span><span class="token punctuation">></span></span> types<span class="token punctuation">,</span> |
| <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Object</span><span class="token punctuation">></span></span> values<span class="token punctuation">)</span> |
| <span class="token keyword">void</span> <span class="token function">testInsertRecords</span><span class="token punctuation">(</span><span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> deviceIds<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Long</span><span class="token punctuation">></span></span> times<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">List</span><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span><span class="token punctuation">></span></span> measurementsList<span class="token punctuation">,</span> |
| <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">List</span><span class="token punctuation"><</span><span class="token class-name">TSDataType</span><span class="token punctuation">></span><span class="token punctuation">></span></span> typesList<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">List</span><span class="token punctuation"><</span><span class="token class-name">Object</span><span class="token punctuation">></span><span class="token punctuation">></span></span> valuesList<span class="token punctuation">)</span> |
| <span class="token keyword">void</span> <span class="token function">testInsertTablet</span><span class="token punctuation">(</span><span class="token class-name">Tablet</span> tablet<span class="token punctuation">,</span> <span class="token keyword">boolean</span> sorted<span class="token punctuation">)</span> |
| <span class="token keyword">void</span> <span class="token function">testInsertTablets</span><span class="token punctuation">(</span><span class="token class-name">Map</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">Tablet</span><span class="token punctuation">></span></span> tablets<span class="token punctuation">)</span> |
| <span class="token keyword">void</span> <span class="token function">testInsertTablets</span><span class="token punctuation">(</span><span class="token class-name">Map</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">Tablet</span><span class="token punctuation">></span></span> tablets<span class="token punctuation">,</span> <span class="token keyword">boolean</span> sorted<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br></div></div><p>The above interfaces are newly added to test responsiveness of new insert interfaces.</p> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">createTimeseries</span><span class="token punctuation">(</span><span class="token class-name">String</span> path<span class="token punctuation">,</span> <span class="token class-name">TSDataType</span> dataType<span class="token punctuation">,</span> <span class="token class-name">TSEncoding</span> encoding<span class="token punctuation">,</span> <span class="token class-name">CompressionType</span> compressor<span class="token punctuation">,</span> |
| <span class="token class-name">Map</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">String</span><span class="token punctuation">></span></span> props<span class="token punctuation">,</span> <span class="token class-name">Map</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">String</span><span class="token punctuation">></span></span> tags<span class="token punctuation">,</span> <span class="token class-name">Map</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">String</span><span class="token punctuation">></span></span> attributes<span class="token punctuation">,</span> |
| <span class="token class-name">String</span> measurementAlias<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><p>Create a timeseries with path, datatype, encoding and compression. Additionally, users can provide props, tags, attributes and measurementAlias。</p> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">createMultiTimeseries</span><span class="token punctuation">(</span><span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> paths<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">TSDataType</span><span class="token punctuation">></span></span> dataTypes<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">TSEncoding</span><span class="token punctuation">></span></span> encodings<span class="token punctuation">,</span> |
| <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">CompressionType</span><span class="token punctuation">></span></span> compressors<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Map</span><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">String</span><span class="token punctuation">></span><span class="token punctuation">></span></span> propsList<span class="token punctuation">,</span> |
| <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Map</span><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">String</span><span class="token punctuation">></span><span class="token punctuation">></span></span> tagsList<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Map</span><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">String</span><span class="token punctuation">></span><span class="token punctuation">></span></span> attributesList<span class="token punctuation">,</span> |
| <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> measurementAliasList<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><p>Create multiple timeseries with a single method. Users can provide props, tags, attributes and measurementAlias as well for detailed timeseries information.</p> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">createAlignedTimeseries</span><span class="token punctuation">(</span><span class="token class-name">String</span> devicePath<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> measurements<span class="token punctuation">,</span> |
| <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">TSDataType</span><span class="token punctuation">></span></span> dataTypes<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">TSEncoding</span><span class="token punctuation">></span></span> encodings<span class="token punctuation">,</span> |
| <span class="token class-name">CompressionType</span> compressor<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> measurementAliasList<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><p>Create aligned timeseries with device path, measurements, data types, encodings, compression.</p> <p>Attention: Alias of measurements are <strong>not supported</strong> currently.</p> <div class="language-java line-numbers-mode"><pre class="language-java"><code> |
| <span class="token keyword">boolean</span> <span class="token function">checkTimeseriesExists</span><span class="token punctuation">(</span><span class="token class-name">String</span> path<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><p>Add a method to check whether the specific timeseries exists.</p> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token class-name">Session</span><span class="token punctuation">(</span><span class="token class-name">String</span> host<span class="token punctuation">,</span> <span class="token keyword">int</span> rpcPort<span class="token punctuation">,</span> <span class="token class-name">String</span> username<span class="token punctuation">,</span> <span class="token class-name">String</span> password<span class="token punctuation">,</span> |
| <span class="token keyword">boolean</span> isEnableCacheLeader<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><p>Open a session and specifies whether the Leader cache is enabled. Note that this interface improves performance for distributed IoTDB, but adds less cost to the client for stand-alone IoTDB.</p> <div class="language- line-numbers-mode"><pre class="language-text"><code> |
| * name: template name |
| * measurements: List of measurements, if it is a single measurement, just put it's name |
| * into a list and add to measurements if it is a vector measurement, put all measurements of |
| * the vector into a list and add to measurements |
| * dataTypes: List of datatypes, if it is a single measurement, just put it's type into a |
| * list and add to dataTypes if it is a vector measurement, put all types of the vector |
| * into a list and add to dataTypes |
| * encodings: List of encodings, if it is a single measurement, just put it's encoding into |
| * a list and add to encodings if it is a vector measurement, put all encodings of the |
| * vector into a list and add to encodings |
| * compressors: List of compressors |
| void createSchemaTemplate( |
| String templateName, |
| List<String> schemaName, |
| List<List<String>> measurements, |
| List<List<TSDataType>> dataTypes, |
| List<List<TSEncoding>> encodings, |
| List<CompressionType> compressors) |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br></div></div><p>Create a device template, the param description at above</p> <div class="language- line-numbers-mode"><pre class="language-text"><code> |
| void setSchemaTemplate(String templateName, String prefixPath) |
| |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><p>Set the device template named 'templateName' at path 'prefixPath'. You should firstly create the template using</p> <div class="language- line-numbers-mode"><pre class="language-text"><code> |
| void createSchemaTemplate |
| |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><h3 id="cluster-information-related-apis-only-works-in-the-cluster-mode"><a href="#cluster-information-related-apis-only-works-in-the-cluster-mode" class="header-anchor">#</a> Cluster information related APIs (only works in the cluster mode)</h3> <p>Cluster information related APIs allow users get the cluster info like where a storage group will be |
| partitioned to, the status of each node in the cluster.</p> <p>To use the APIs, add dependency in your pom file:</p> <div class="language-xml line-numbers-mode"><pre class="language-xml"><code><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>dependencies</span><span class="token punctuation">></span></span> |
| <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>dependency</span><span class="token punctuation">></span></span> |
| <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>groupId</span><span class="token punctuation">></span></span>org.apache.iotdb<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>groupId</span><span class="token punctuation">></span></span> |
| <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>artifactId</span><span class="token punctuation">></span></span>iotdb-thrift-cluster<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>artifactId</span><span class="token punctuation">></span></span> |
| <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>version</span><span class="token punctuation">></span></span>0.13.0-SNAPSHOT<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>version</span><span class="token punctuation">></span></span> |
| <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>dependency</span><span class="token punctuation">></span></span> |
| <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>dependencies</span><span class="token punctuation">></span></span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br></div></div><p>How to open a connection:</p> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>thrift<span class="token punctuation">.</span>protocol<span class="token punctuation">.</span></span><span class="token class-name">TBinaryProtocol</span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>thrift<span class="token punctuation">.</span>transport<span class="token punctuation">.</span></span><span class="token class-name">TSocket</span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>thrift<span class="token punctuation">.</span>transport<span class="token punctuation">.</span></span><span class="token class-name">TTransport</span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>thrift<span class="token punctuation">.</span>transport<span class="token punctuation">.</span></span><span class="token class-name">TTransportException</span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>rpc<span class="token punctuation">.</span></span><span class="token class-name">RpcTransportFactory</span><span class="token punctuation">;</span> |
| |
| <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">CluserInfoClient</span> <span class="token punctuation">{</span> |
| <span class="token class-name">TTransport</span> transport<span class="token punctuation">;</span> |
| <span class="token class-name">ClusterInfoService<span class="token punctuation">.</span>Client</span> client<span class="token punctuation">;</span> |
| <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">connect</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> |
| transport <span class="token operator">=</span> |
| <span class="token class-name">RpcTransportFactory</span><span class="token punctuation">.</span>INSTANCE<span class="token punctuation">.</span><span class="token function">getTransport</span><span class="token punctuation">(</span> |
| <span class="token keyword">new</span> <span class="token class-name">TSocket</span><span class="token punctuation">(</span> |
| <span class="token comment">// the RPC address</span> |
| <span class="token class-name">IoTDBDescriptor</span><span class="token punctuation">.</span><span class="token function">getInstance</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getConfig</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getRpcAddress</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> |
| <span class="token comment">// the RPC port</span> |
| <span class="token class-name">ClusterDescriptor</span><span class="token punctuation">.</span><span class="token function">getInstance</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getConfig</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getClusterRpcPort</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token keyword">try</span> <span class="token punctuation">{</span> |
| transport<span class="token punctuation">.</span><span class="token keyword">open</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">TTransportException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{</span> |
| <span class="token class-name">Assert</span><span class="token punctuation">.</span><span class="token function">fail</span><span class="token punctuation">(</span>e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span> |
| <span class="token comment">//get the client</span> |
| client <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ClusterInfoService<span class="token punctuation">.</span>Client</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">TBinaryProtocol</span><span class="token punctuation">(</span>transport<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span> |
| <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">close</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> |
| transport<span class="token punctuation">.</span><span class="token function">close</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span> |
| <span class="token punctuation">}</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br></div></div><p>APIs in <code>ClusterInfoService.Client</code>:</p> <ul><li>Get the physical hash ring of the cluster:</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code>list<span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Node</span><span class="token punctuation">></span></span> <span class="token function">getRing</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><ul><li>Get data partition information of input path and time range:</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code> <span class="token comment">/** |
| * @param path input path (should contains a Storage group name as its prefix) |
| * @return the data partition info. If the time range only covers one data partition, the the size |
| * of the list is one. |
| */</span> |
| list<span class="token generics"><span class="token punctuation"><</span><span class="token class-name">DataPartitionEntry</span><span class="token punctuation">></span></span> <span class="token function">getDataPartition</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token operator">:</span>string path<span class="token punctuation">,</span> <span class="token number">2</span><span class="token operator">:</span><span class="token keyword">long</span> startTime<span class="token punctuation">,</span> <span class="token number">3</span><span class="token operator">:</span><span class="token keyword">long</span> endTime<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br></div></div><ul><li>Get metadata partition information of input path:</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code> <span class="token comment">/** |
| * @param path input path (should contains a Storage group name as its prefix) |
| * @return metadata partition information |
| */</span> |
| list<span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Node</span><span class="token punctuation">></span></span> <span class="token function">getMetaPartition</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token operator">:</span>string path<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br></div></div><ul><li>Get the status (alive or not) of all nodes:</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code> <span class="token comment">/** |
| * @return key: node, value: live or not |
| */</span> |
| map<span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Node</span><span class="token punctuation">,</span> bool<span class="token punctuation">></span></span> <span class="token function">getAllNodeStatus</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><ul><li>get the raft group info (voteFor, term, etc..) of the connected node |
| (Notice that this API is rarely used by users):</li></ul> <div class="language-java line-numbers-mode"><pre class="language-java"><code> <span class="token comment">/** |
| * @return A multi-line string with each line representing the total time consumption, invocation |
| * number, and average time consumption. |
| */</span> |
| string <span class="token function">getInstrumentingInfo</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br></div></div></div> <div class="page-nav"><p class="inner"><span class="prev"> |
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