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| <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 (V0.12.x)</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 class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Data Concept</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>CLI</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Administration Management</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>IoTDB-SQL Language</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>API</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>UDF</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 open"><span>Ecosystem Integration</span> <span class="arrow down"></span></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/UserGuide/V0.12.x/Ecosystem Integration/Grafana.html" class="sidebar-link">Grafana</a></li><li><a href="/UserGuide/V0.12.x/Ecosystem Integration/Zeppelin-IoTDB.html" class="sidebar-link">Zeppelin-IoTDB</a></li><li><a href="/UserGuide/V0.12.x/Ecosystem Integration/MapReduce TsFile.html" class="sidebar-link">MapReduce TsFile</a></li><li><a href="/UserGuide/V0.12.x/Ecosystem Integration/Spark TsFile.html" class="sidebar-link">Spark TsFile</a></li><li><a href="/UserGuide/V0.12.x/Ecosystem Integration/Spark IoTDB.html" class="sidebar-link">Spark IoTDB</a></li><li><a href="/UserGuide/V0.12.x/Ecosystem Integration/Hive TsFile.html" class="sidebar-link">Hive TsFile</a></li><li><a href="/UserGuide/V0.12.x/Ecosystem Integration/Flink IoTDB.html" class="active sidebar-link">Flink IoTDB</a></li><li><a href="/UserGuide/V0.12.x/Ecosystem Integration/Flink TsFile.html" class="sidebar-link">Flink TsFile</a></li><li><a href="/UserGuide/V0.12.x/Ecosystem Integration/Writing Data on HDFS.html" class="sidebar-link">Writing Data on HDFS</a></li></ul></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="flink-iotdb-connector"><a href="#flink-iotdb-connector" class="header-anchor">#</a> Flink-IoTDB-Connector</h2> <p>IoTDB integration for <a href="https://flink.apache.org/" target="_blank" rel="noopener noreferrer">Apache Flink<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>. This module includes the IoTDB sink that allows a flink job to write events into timeseries, and the IoTDB source allowing reading data from IoTDB.</p> <h3 id="iotdbsink"><a href="#iotdbsink" class="header-anchor">#</a> IoTDBSink</h3> <p>To use the <code>IoTDBSink</code>, you need construct an instance of it by specifying <code>IoTDBSinkOptions</code> and <code>IoTSerializationSchema</code> instances. |
| The <code>IoTDBSink</code> send only one event after another by default, but you can change to batch by invoking <code>withBatchSize(int)</code>.</p> <h4 id="example"><a href="#example" class="header-anchor">#</a> Example</h4> <p>This example shows a case that sends data to a IoTDB server from a Flink job:</p> <ul><li>A simulated Source <code>SensorSource</code> generates data points per 1 second.</li> <li>Flink uses <code>IoTDBSink</code> to consume the generated data points and write the data into IoTDB.</li></ul> <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>iotdb<span class="token punctuation">.</span>tsfile<span class="token punctuation">.</span>file<span class="token punctuation">.</span>metadata<span class="token punctuation">.</span>enums<span class="token punctuation">.</span></span><span class="token class-name">CompressionType</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>tsfile<span class="token punctuation">.</span>file<span class="token punctuation">.</span>metadata<span class="token punctuation">.</span>enums<span class="token punctuation">.</span></span><span class="token class-name">TSDataType</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>tsfile<span class="token punctuation">.</span>file<span class="token punctuation">.</span>metadata<span class="token punctuation">.</span>enums<span class="token punctuation">.</span></span><span class="token class-name">TSEncoding</span><span class="token punctuation">;</span> |
| |
| <span class="token keyword">import</span> <span class="token namespace">com<span class="token punctuation">.</span>google<span class="token punctuation">.</span>common<span class="token punctuation">.</span>collect<span class="token punctuation">.</span></span><span class="token class-name">Lists</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>flink<span class="token punctuation">.</span>streaming<span class="token punctuation">.</span>api<span class="token punctuation">.</span>environment<span class="token punctuation">.</span></span><span class="token class-name">StreamExecutionEnvironment</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>flink<span class="token punctuation">.</span>streaming<span class="token punctuation">.</span>api<span class="token punctuation">.</span>functions<span class="token punctuation">.</span>source<span class="token punctuation">.</span></span><span class="token class-name">SourceFunction</span><span class="token punctuation">;</span> |
| |
| <span class="token keyword">import</span> <span class="token namespace">java<span class="token punctuation">.</span>security<span class="token punctuation">.</span></span><span class="token class-name">SecureRandom</span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token namespace">java<span class="token punctuation">.</span>util<span class="token punctuation">.</span></span><span class="token class-name">HashMap</span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token namespace">java<span class="token punctuation">.</span>util<span class="token punctuation">.</span></span><span class="token class-name">Map</span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token namespace">java<span class="token punctuation">.</span>util<span class="token punctuation">.</span></span><span class="token class-name">Random</span><span class="token punctuation">;</span> |
| |
| <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">FlinkIoTDBSink</span> <span class="token punctuation">{</span> |
| <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">Exception</span> <span class="token punctuation">{</span> |
| <span class="token comment">// run the flink job on local mini cluster</span> |
| <span class="token class-name">StreamExecutionEnvironment</span> env <span class="token operator">=</span> <span class="token class-name">StreamExecutionEnvironment</span><span class="token punctuation">.</span><span class="token function">getExecutionEnvironment</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token class-name">IoTDBSinkOptions</span> options <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">IoTDBSinkOptions</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| options<span class="token punctuation">.</span><span class="token function">setHost</span><span class="token punctuation">(</span><span class="token string">"127.0.0.1"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| options<span class="token punctuation">.</span><span class="token function">setPort</span><span class="token punctuation">(</span><span class="token number">6667</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| options<span class="token punctuation">.</span><span class="token function">setUser</span><span class="token punctuation">(</span><span class="token string">"root"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| options<span class="token punctuation">.</span><span class="token function">setPassword</span><span class="token punctuation">(</span><span class="token string">"root"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| options<span class="token punctuation">.</span><span class="token function">setStorageGroup</span><span class="token punctuation">(</span><span class="token string">"root.sg"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token comment">// If the server enables auto_create_schema, then we do not need to register all timeseries</span> |
| <span class="token comment">// here.</span> |
| options<span class="token punctuation">.</span><span class="token function">setTimeseriesOptionList</span><span class="token punctuation">(</span> |
| <span class="token class-name">Lists</span><span class="token punctuation">.</span><span class="token function">newArrayList</span><span class="token punctuation">(</span> |
| <span class="token keyword">new</span> <span class="token class-name">IoTDBSinkOptions<span class="token punctuation">.</span>TimeseriesOption</span><span class="token punctuation">(</span> |
| <span class="token string">"root.sg.d1.s1"</span><span class="token punctuation">,</span> <span class="token class-name">TSDataType</span><span class="token punctuation">.</span>DOUBLE<span class="token punctuation">,</span> <span class="token class-name">TSEncoding</span><span class="token punctuation">.</span>GORILLA<span class="token punctuation">,</span> <span class="token class-name">CompressionType</span><span class="token punctuation">.</span>SNAPPY<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token class-name">IoTSerializationSchema</span> serializationSchema <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">DefaultIoTSerializationSchema</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token class-name">IoTDBSink</span> ioTDBSink <span class="token operator">=</span> |
| <span class="token keyword">new</span> <span class="token class-name">IoTDBSink</span><span class="token punctuation">(</span>options<span class="token punctuation">,</span> serializationSchema<span class="token punctuation">)</span> |
| <span class="token comment">// enable batching</span> |
| <span class="token punctuation">.</span><span class="token function">withBatchSize</span><span class="token punctuation">(</span><span class="token number">10</span><span class="token punctuation">)</span> |
| <span class="token comment">// how many connectons to the server will be created for each parallelism</span> |
| <span class="token punctuation">.</span><span class="token function">withSessionPoolSize</span><span class="token punctuation">(</span><span class="token number">3</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| env<span class="token punctuation">.</span><span class="token function">addSource</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">SensorSource</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">name</span><span class="token punctuation">(</span><span class="token string">"sensor-source"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">setParallelism</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">addSink</span><span class="token punctuation">(</span>ioTDBSink<span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">name</span><span class="token punctuation">(</span><span class="token string">"iotdb-sink"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| env<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span><span class="token string">"iotdb-flink-example"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span> |
| |
| <span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token keyword">class</span> <span class="token class-name">SensorSource</span> <span class="token keyword">implements</span> <span class="token class-name">SourceFunction</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> <span class="token punctuation">{</span> |
| <span class="token keyword">boolean</span> running <span class="token operator">=</span> <span class="token boolean">true</span><span class="token punctuation">;</span> |
| <span class="token class-name">Random</span> random <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">SecureRandom</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token annotation punctuation">@Override</span> |
| <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">run</span><span class="token punctuation">(</span><span class="token class-name">SourceContext</span> context<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">Exception</span> <span class="token punctuation">{</span> |
| <span class="token keyword">while</span> <span class="token punctuation">(</span>running<span class="token punctuation">)</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">String</span><span class="token punctuation">></span></span> tuple <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">HashMap</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| tuple<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span><span class="token string">"device"</span><span class="token punctuation">,</span> <span class="token string">"root.sg.d1"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| tuple<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span><span class="token string">"timestamp"</span><span class="token punctuation">,</span> <span class="token class-name">String</span><span class="token punctuation">.</span><span class="token function">valueOf</span><span class="token punctuation">(</span><span class="token class-name">System</span><span class="token punctuation">.</span><span class="token function">currentTimeMillis</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> |
| tuple<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span><span class="token string">"measurements"</span><span class="token punctuation">,</span> <span class="token string">"s1"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| tuple<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span><span class="token string">"types"</span><span class="token punctuation">,</span> <span class="token string">"DOUBLE"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| tuple<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span><span class="token string">"values"</span><span class="token punctuation">,</span> <span class="token class-name">String</span><span class="token punctuation">.</span><span class="token function">valueOf</span><span class="token punctuation">(</span>random<span class="token punctuation">.</span><span class="token function">nextDouble</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> |
| |
| context<span class="token punctuation">.</span><span class="token function">collect</span><span class="token punctuation">(</span>tuple<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token class-name">Thread</span><span class="token punctuation">.</span><span class="token function">sleep</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span> |
| <span class="token punctuation">}</span> |
| |
| <span class="token annotation punctuation">@Override</span> |
| <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">cancel</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> |
| running <span class="token operator">=</span> <span class="token boolean">false</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><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br><span class="line-number">34</span><br><span class="line-number">35</span><br><span class="line-number">36</span><br><span class="line-number">37</span><br><span class="line-number">38</span><br><span class="line-number">39</span><br><span class="line-number">40</span><br><span class="line-number">41</span><br><span class="line-number">42</span><br><span class="line-number">43</span><br><span class="line-number">44</span><br><span class="line-number">45</span><br><span class="line-number">46</span><br><span class="line-number">47</span><br><span class="line-number">48</span><br><span class="line-number">49</span><br><span class="line-number">50</span><br><span class="line-number">51</span><br><span class="line-number">52</span><br><span class="line-number">53</span><br><span class="line-number">54</span><br><span class="line-number">55</span><br><span class="line-number">56</span><br><span class="line-number">57</span><br><span class="line-number">58</span><br><span class="line-number">59</span><br><span class="line-number">60</span><br><span class="line-number">61</span><br><span class="line-number">62</span><br><span class="line-number">63</span><br><span class="line-number">64</span><br><span class="line-number">65</span><br><span class="line-number">66</span><br><span class="line-number">67</span><br><span class="line-number">68</span><br><span class="line-number">69</span><br><span class="line-number">70</span><br><span class="line-number">71</span><br><span class="line-number">72</span><br><span class="line-number">73</span><br><span class="line-number">74</span><br><span class="line-number">75</span><br></div></div><h4 id="usage"><a href="#usage" class="header-anchor">#</a> Usage</h4> <ul><li>Launch the IoTDB server.</li> <li>Run <code>org.apache.iotdb.flink.FlinkIoTDBSink.java</code> to run the flink job on local mini cluster.</li></ul> <h3 id="iotdbsource"><a href="#iotdbsource" class="header-anchor">#</a> IoTDBSource</h3> <p>To use the <code>IoTDBSource</code>, you need to construct an instance of <code>IoTDBSource</code> by specifying <code>IoTDBSourceOptions</code> |
| and implementing the abstract method <code>convert()</code> in <code>IoTDBSource</code>. The <code>convert</code> methods defines how |
| you want the row data to be transformed.</p> <h4 id="example-2"><a href="#example-2" class="header-anchor">#</a> Example</h4> <p>This example shows a case where data are read from IoTDB.</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>iotdb<span class="token punctuation">.</span>flink<span class="token punctuation">.</span>options<span class="token punctuation">.</span></span><span class="token class-name">IoTDBSourceOptions</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">IoTDBConnectionException</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">StatementExecutionException</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">TSStatusCode</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>session<span class="token punctuation">.</span></span><span class="token class-name">Session</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>tsfile<span class="token punctuation">.</span>file<span class="token punctuation">.</span>metadata<span class="token punctuation">.</span>enums<span class="token punctuation">.</span></span><span class="token class-name">CompressionType</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>tsfile<span class="token punctuation">.</span>file<span class="token punctuation">.</span>metadata<span class="token punctuation">.</span>enums<span class="token punctuation">.</span></span><span class="token class-name">TSDataType</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>tsfile<span class="token punctuation">.</span>file<span class="token punctuation">.</span>metadata<span class="token punctuation">.</span>enums<span class="token punctuation">.</span></span><span class="token class-name">TSEncoding</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>tsfile<span class="token punctuation">.</span>read<span class="token punctuation">.</span>common<span class="token punctuation">.</span></span><span class="token class-name">RowRecord</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>flink<span class="token punctuation">.</span>streaming<span class="token punctuation">.</span>api<span class="token punctuation">.</span>environment<span class="token punctuation">.</span></span><span class="token class-name">StreamExecutionEnvironment</span><span class="token punctuation">;</span> |
| |
| <span class="token keyword">import</span> <span class="token namespace">java<span class="token punctuation">.</span>util<span class="token punctuation">.</span></span><span class="token class-name">ArrayList</span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token namespace">java<span class="token punctuation">.</span>util<span class="token punctuation">.</span></span><span class="token class-name">List</span><span class="token punctuation">;</span> |
| |
| <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">FlinkIoTDBSource</span> <span class="token punctuation">{</span> |
| |
| <span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token class-name">String</span> LOCAL_HOST <span class="token operator">=</span> <span class="token string">"127.0.0.1"</span><span class="token punctuation">;</span> |
| <span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token class-name">String</span> ROOT_SG1_D1_S1 <span class="token operator">=</span> <span class="token string">"root.sg1.d1.s1"</span><span class="token punctuation">;</span> |
| <span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token class-name">String</span> ROOT_SG1_D1 <span class="token operator">=</span> <span class="token string">"root.sg1.d1"</span><span class="token punctuation">;</span> |
| |
| <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">Exception</span> <span class="token punctuation">{</span> |
| <span class="token function">prepareData</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token comment">// run the flink job on local mini cluster</span> |
| <span class="token class-name">StreamExecutionEnvironment</span> env <span class="token operator">=</span> <span class="token class-name">StreamExecutionEnvironment</span><span class="token punctuation">.</span><span class="token function">getExecutionEnvironment</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token class-name">IoTDBSourceOptions</span> ioTDBSourceOptions <span class="token operator">=</span> |
| <span class="token keyword">new</span> <span class="token class-name">IoTDBSourceOptions</span><span class="token punctuation">(</span><span class="token string">"127.0.0.1"</span><span class="token punctuation">,</span> <span class="token number">6667</span><span class="token punctuation">,</span> <span class="token string">"root"</span><span class="token punctuation">,</span> <span class="token string">"root"</span><span class="token punctuation">,</span> |
| <span class="token string">"select s1 from "</span> <span class="token operator">+</span> ROOT_SG1_D1 <span class="token operator">+</span> <span class="token string">" align by device"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| env<span class="token punctuation">.</span><span class="token function">addSource</span><span class="token punctuation">(</span> |
| <span class="token keyword">new</span> <span class="token class-name">IoTDBSource</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">RowRecord</span><span class="token punctuation">></span></span><span class="token punctuation">(</span>ioTDBSourceOptions<span class="token punctuation">)</span> <span class="token punctuation">{</span> |
| <span class="token annotation punctuation">@Override</span> |
| <span class="token keyword">public</span> <span class="token class-name">RowRecord</span> <span class="token function">convert</span><span class="token punctuation">(</span><span class="token class-name">RowRecord</span> rowRecord<span class="token punctuation">)</span> <span class="token punctuation">{</span> |
| <span class="token keyword">return</span> rowRecord<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 function">name</span><span class="token punctuation">(</span><span class="token string">"sensor-source"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">setParallelism</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| env<span class="token punctuation">.</span><span class="token function">execute</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">/** |
| * Write some data to IoTDB |
| */</span> |
| <span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">prepareData</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">IoTDBConnectionException</span><span class="token punctuation">,</span> <span class="token class-name">StatementExecutionException</span> <span class="token punctuation">{</span> |
| <span class="token class-name">Session</span> session <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Session</span><span class="token punctuation">(</span>LOCAL_HOST<span class="token punctuation">,</span> <span class="token number">6667</span><span class="token punctuation">,</span> <span class="token string">"root"</span><span class="token punctuation">,</span> <span class="token string">"root"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| session<span class="token punctuation">.</span><span class="token keyword">open</span><span class="token punctuation">(</span><span class="token boolean">false</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token keyword">try</span> <span class="token punctuation">{</span> |
| session<span class="token punctuation">.</span><span class="token function">setStorageGroup</span><span class="token punctuation">(</span><span class="token string">"root.sg1"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token operator">!</span>session<span class="token punctuation">.</span><span class="token function">checkTimeseriesExists</span><span class="token punctuation">(</span>ROOT_SG1_D1_S1<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> |
| session<span class="token punctuation">.</span><span class="token function">createTimeseries</span><span class="token punctuation">(</span> |
| ROOT_SG1_D1_S1<span class="token punctuation">,</span> <span class="token class-name">TSDataType</span><span class="token punctuation">.</span>INT64<span class="token punctuation">,</span> <span class="token class-name">TSEncoding</span><span class="token punctuation">.</span>RLE<span class="token punctuation">,</span> <span class="token class-name">CompressionType</span><span class="token punctuation">.</span>SNAPPY<span class="token punctuation">)</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> measurements <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation"><</span><span class="token punctuation">></span></span><span class="token punctuation">(</span><span class="token punctuation">)</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">TSDataType</span><span class="token punctuation">></span></span> types <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation"><</span><span class="token punctuation">></span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| measurements<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token string">"s1"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| measurements<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token string">"s2"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| measurements<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token string">"s3"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| types<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token class-name">TSDataType</span><span class="token punctuation">.</span>INT64<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| types<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token class-name">TSDataType</span><span class="token punctuation">.</span>INT64<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| types<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token class-name">TSDataType</span><span class="token punctuation">.</span>INT64<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">long</span> time <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> time <span class="token operator"><</span> <span class="token number">100</span><span class="token punctuation">;</span> time<span class="token operator">++</span><span class="token punctuation">)</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">Object</span><span class="token punctuation">></span></span> values <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation"><</span><span class="token punctuation">></span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| values<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token number">1L</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| values<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token number">2L</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| values<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token number">3L</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| session<span class="token punctuation">.</span><span class="token function">insertRecord</span><span class="token punctuation">(</span>ROOT_SG1_D1<span class="token punctuation">,</span> time<span class="token punctuation">,</span> measurements<span class="token punctuation">,</span> types<span class="token punctuation">,</span> values<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">catch</span> <span class="token punctuation">(</span><span class="token class-name">StatementExecutionException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{</span> |
| <span class="token keyword">if</span> <span class="token punctuation">(</span>e<span class="token punctuation">.</span><span class="token function">getStatusCode</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">!=</span> <span class="token class-name">TSStatusCode</span><span class="token punctuation">.</span>PATH_ALREADY_EXIST_ERROR<span class="token punctuation">.</span><span class="token function">getStatusCode</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">throw</span> e<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><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br><span class="line-number">34</span><br><span class="line-number">35</span><br><span class="line-number">36</span><br><span class="line-number">37</span><br><span class="line-number">38</span><br><span class="line-number">39</span><br><span class="line-number">40</span><br><span class="line-number">41</span><br><span class="line-number">42</span><br><span class="line-number">43</span><br><span class="line-number">44</span><br><span class="line-number">45</span><br><span class="line-number">46</span><br><span class="line-number">47</span><br><span class="line-number">48</span><br><span class="line-number">49</span><br><span class="line-number">50</span><br><span class="line-number">51</span><br><span class="line-number">52</span><br><span class="line-number">53</span><br><span class="line-number">54</span><br><span class="line-number">55</span><br><span class="line-number">56</span><br><span class="line-number">57</span><br><span class="line-number">58</span><br><span class="line-number">59</span><br><span class="line-number">60</span><br><span class="line-number">61</span><br><span class="line-number">62</span><br><span class="line-number">63</span><br><span class="line-number">64</span><br><span class="line-number">65</span><br><span class="line-number">66</span><br><span class="line-number">67</span><br><span class="line-number">68</span><br><span class="line-number">69</span><br><span class="line-number">70</span><br><span class="line-number">71</span><br><span class="line-number">72</span><br><span class="line-number">73</span><br><span class="line-number">74</span><br><span class="line-number">75</span><br><span class="line-number">76</span><br><span class="line-number">77</span><br><span class="line-number">78</span><br><span class="line-number">79</span><br></div></div><h4 id="usage-2"><a href="#usage-2" class="header-anchor">#</a> Usage</h4> <p>Launch the IoTDB server. |
| Run org.apache.iotdb.flink.FlinkIoTDBSource.java to run the flink job on local mini cluster.</p></div> <div class="page-nav"><p class="inner"><span class="prev"> |
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