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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></div></header> <div class="sidebar-mask"></div> <aside class="sidebar"><nav class="nav-links"><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">Documentation</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/UserGuide/Master/QuickStart/QuickStart.html" class="nav-link">latest</a></li><li class="dropdown-item"><!----> <a href="/UserGuide/V0.13.x/QuickStart/QuickStart.html" class="nav-link">v0.13.x</a></li><li class="dropdown-item"><!----> <a href="/UserGuide/V0.12.x/QuickStart/QuickStart.html" class="nav-link">v0.12.x</a></li><li class="dropdown-item"><!----> <a href="/UserGuide/V0.11.x/Get Started/QuickStart.html" class="nav-link">v0.11.x</a></li><li class="dropdown-item"><!----> <a href="/UserGuide/V0.10.x/Get Started/QuickStart.html" class="nav-link">v0.10.x</a></li><li class="dropdown-item"><!----> <a href="/UserGuide/V0.9.x/0-Get Started/1-QuickStart.html" class="nav-link">v0.9.x</a></li><li class="dropdown-item"><!----> <a href="/UserGuide/V0.8.x/0-Get Started/1-QuickStart.html" class="nav-link">v0.8.x</a></li></ul></div></div><div class="nav-item"><a href="https://cwiki.apache.org/confluence/display/IOTDB/System+Design" class="nav-link external"> |
| Design |
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| <!----></a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">Languages</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/Development/ContributeGuide.html" aria-current="page" class="nav-link router-link-exact-active router-link-active">English</a></li><li class="dropdown-item"><!----> <a href="/zh/Development/ContributeGuide.html" class="nav-link">简体中文</a></li></ul></div></div> <a href="https://github.com/apache/iotdb.git" target="_blank" rel="noopener noreferrer" class="repo-link"> |
| 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> <!----> </aside> <main class="page"> <div class="content content__default"><h1 id="iotdb-working-process"><a href="#iotdb-working-process" class="header-anchor">#</a> IoTDB Working Process</h1> <h2 id="main-link"><a href="#main-link" class="header-anchor">#</a> Main link</h2> <p>IoTDB official website：https://iotdb.apache.org/</p> <p>Code library：https://github.com/apache/iotdb</p> <p>Code library for go language: https://github.com/apache/iotdb-client-go</p> <p>Library for resources (project's documents, compiler, etc): https://github.com/apache/iotdb-bin-resources</p> <p>Get started quickly：http://iotdb.apache.org/UserGuide/Master/QuickStart/QuickStart.html</p> <p>Jira Task Management：https://issues.apache.org/jira/projects/IOTDB/issues</p> <p>Wiki Document Management：https://cwiki.apache.org/confluence/display/IOTDB/Home\</p> <p>Mailing list: https://lists.apache.org/list.html?dev@iotdb.apache.org</p> <p>Everyday build: https://ci-builds.apache.org/job/IoTDB/job/IoTDB-Pipe/job/master/</p> <p>Slack: https://apacheiotdb.slack.com/join/shared_invite/zt-qvso1nj8-7715TpySZtZqmyG5qXQwpg#/shared-invite/email</p> <h2 id="subscribe-to-mailing-list"><a href="#subscribe-to-mailing-list" class="header-anchor">#</a> Subscribe to mailing list</h2> <p>The mailing list is where the Apache project conducts technical discussions and communication with users. Follow the mailing list to receive mail.</p> <p>Mailing list address：dev@iotdb.apache.org</p> <p>Follow method: Send an email to dev-subscribe@iotdb.apache.org with the email you want to receive the email, the subject content is not limited, after receiving the reply, send a confirmation email to the confirmation address again (the confirmation address is longer, it is recommended gmail mailbox).</p> <p>Other mailing list:</p> <ul><li>notifications@iotdb.apache.org (for JIRA information notification.) |
| <ul><li>If you only want to receive individual Jira notifications that you are interest in, you do not need to subscribe this mailing list. Instead, you just need to click "start-watching this issue" on the jira issue webpage or just comment on this issue.</li></ul></li> <li>commits@iotdb.apache.org (Any code changes will be notified here, please note that this mailing list will be very large)</li> <li>reviews@iotdb.apache.org (Any code review comments will be notified here, please note that this mailing list will be very large)</li></ul> <h2 id="new-features-bug-feedback-improvements-and-more"><a href="#new-features-bug-feedback-improvements-and-more" class="header-anchor">#</a> New features, bug feedback, improvements and more</h2> <p>All features or bugs that you want IoTDB to do can be raised on Jira：https://issues.apache.org/jira/projects/IOTDB/issues</p> <p>You can choose issue types: bug, improvement, new feature, etc. New issues will be automatically synchronized to the mailing list (notifications@), and subsequent discussions can be left on jira or on the mailing list. When the issue is resolved, close the issue.</p> <h2 id="email-discussion-content-english"><a href="#email-discussion-content-english" class="header-anchor">#</a> Email discussion content (English)</h2> <ul><li><p>Joining the mailing list for the first time can introduce youself briefly. (Hi, I'm xxx ...)</p></li> <li><p>Before developing a new feature, you can send an e-mail to declare the task you want to do.（Hi，I'm working on issue IOTDB-XXX，My plan is ...）</p></li></ul> <h2 id="contributing-documents"><a href="#contributing-documents" class="header-anchor">#</a> Contributing documents</h2> <p>The content of all IoTDB official websites is in the docs of the project root directory:</p> <ul><li>docs/SystemDesign: System Design Document-English Version</li> <li>docs/zh/SystemDesign: System Design Document-Chinese Version</li> <li>docs/UserGuide: User Guide English Version</li> <li>docs/zh/UserGuide: User Guide Chinese Version</li> <li>docs/Community: community English Version</li> <li>docs/zh/Community: community Chinese Version</li> <li>docs/Development: Development Guide English Version</li> <li>docs/zh/Development: Development Guide Chinese Version</li></ul> <p>Correspondence between versions and branches on the official website:</p> <ul><li>In progress -> master</li> <li>major_version.x -> rel/major_version （eg 0.9.x -> rel/0.9）</li></ul> <p>Precautions:</p> <ul><li>Images in Markdown can be uploaded to https://github.com/apache/iotdb-bin-resources for url</li> <li>Do not use special Unicode chars, e.g., U+FF1A</li> <li>Do not use the character of dollar (as we will use Latex to generate pdf files)</li></ul> <h2 id="code-formatting"><a href="#code-formatting" class="header-anchor">#</a> Code Formatting</h2> <p>We use the <a href="https://github.com/diffplug/spotless/tree/main/plugin-maven" target="_blank" rel="noopener noreferrer">Spotless |
| plugin<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> together with <a href="https://github.com/google/google-java-format" target="_blank" rel="noopener noreferrer">google-java-format<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> to format our Java code. You can configure your IDE to automatically apply formatting on saving with these steps(Take idea as an example):</p> <ol><li>Download the <a href="https://plugins.jetbrains.com/plugin/8527-google-java-format/versions/stable/83169" target="_blank" rel="noopener noreferrer">google-java-format |
| plugin v1.7.0.5<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>, it can be installed in IDEA (Preferences -> plugins -> search google-java-format), <a href="https://github.com/google/google-java-format#intellij-android-studio-and-other-jetbrains-ides" target="_blank" rel="noopener noreferrer">More detailed setup manual<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></li> <li>Install the plugin from disk (Plugins -> little gear icon -> "Install plugin from disk" -> Navigate to downloaded zip file)</li> <li>In the plugin settings, enable the plugin and keep the default Google code style (2-space indents)</li> <li>Remember to never update this plugin to a later version，until Spotless was upgraded to version 1.8+.</li> <li>Install the <a href="https://plugins.jetbrains.com/plugin/7642-save-actions" target="_blank" rel="noopener noreferrer">Save Actions |
| plugin<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> , and enable the plugin, along with "Optimize imports" and "Reformat file"</li> <li>In the "Save Actions" settings page, setup a "File Path Inclusion" for <code>.*\.java</code>. Otherwise you will get unintended reformatting in other files you edit.</li> <li>Fix the issues of reordering the import packages: in IDEA: choose: Preferences | Editor | Code Style | Java | imports. At the tail of the panel, there is "Import Layout", change it to:</li></ol> <div class="language-shell line-numbers-mode"><pre class="language-shell"><code> <span class="token function">import</span> org.apache.iotdb.* |
| <span class="token operator"><</span>blank line<span class="token operator">></span> |
| <span class="token function">import</span> all other imports |
| <span class="token operator"><</span>blank line<span class="token operator">></span> |
| <span class="token function">import</span> java.* |
| <span class="token operator"><</span>blank line<span class="token operator">></span> |
| <span class="token function">import</span> static all other imports |
| </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><ol start="8"><li>Before you submit codes, you can use <code>mvn spotless:check</code> to check your codes manually, |
| and use <code>mvn spotless:apply</code> to format your codes.</li></ol> <h2 id="code-sytle"><a href="#code-sytle" class="header-anchor">#</a> Code Sytle</h2> <p>We use the <a href="https://checkstyle.sourceforge.io/config_filefilters.html" target="_blank" rel="noopener noreferrer">maven-checkstyle-plugin<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> to make Java codes obey a consistent ruleset defined in <a href="https://github.com/apache/iotdb/blob/master/checkstyle.xml" target="_blank" rel="noopener noreferrer">checkstyle.xml<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> under the project root.</p> <p>You can reference the code style rules in the file. After development, you can use <code>mvn validate</code> to check whether your codes satisfy the style rules.</p> <p>Besides, when you develop in an IDE, some default code style configurations may be conflict with those rules.</p> <p>In IDEA, you can follow these steps to change those inconsistent style formatting rules:</p> <h3 id="disable-using-wildcard-import"><a href="#disable-using-wildcard-import" class="header-anchor">#</a> Disable using wildcard import</h3> <ol><li>Navigate to Java code style configuration page (Preferences... -> Editor -> Code Style -> Java).</li> <li>Switch to the 'imports' tab.</li> <li>In the 'General' section, enable 'Use single class import' option.</li> <li>Change 'Class count to use import with '*'' to 999 or another very large number.</li> <li>Change 'Names to count to use static import with '*'' to 999 or another very large number.</li></ol> <h2 id="contributing-code"><a href="#contributing-code" class="header-anchor">#</a> Contributing code</h2> <p>You can go to jira to pick up the existing issue or create your own issue and get it. The comment says that I can do this issue.</p> <ul><li>Clone the repository to your own local repository, clone to the local, and associate the apache repository as the upstream upstream repository.</li> <li>Cut out a new branch from master. The branch name is determined by the function of this branch. It is usually called f_new_feature (such as f_storage_engine) or fix_bug (such as fix_query_cache_bug).</li> <li>Add code style as the root java-google-style.xml in the idea</li> <li>Modify the code and add test cases (unit test, integration test) |
| <ul><li>Integration test reference:server/src/test/java/org/apache/iotdb/db/integration/IoTDBTimeZoneIT</li></ul></li> <li>Use <code>mvn spotless:check</code> to check the code style and use <code>mvn spotless:apply</code> to correct the code style</li> <li>Submit a PR, starting with [IOTDB-jira number]</li> <li>Email to dev mailing list：(I've submitted a PR for issue IOTDB-xxx [link])</li> <li>Make changes based on other people's reviews and continue to update until merged</li> <li>close jira issue</li></ul> <h1 id="iotdb-debug-guide"><a href="#iotdb-debug-guide" class="header-anchor">#</a> IoTDB Debug Guide</h1> <h2 id="import-the-code"><a href="#import-the-code" class="header-anchor">#</a> Import the code</h2> <h3 id="intellij-idea"><a href="#intellij-idea" class="header-anchor">#</a> Intellij idea</h3> <p>It is recommended to use Intellij idea。<code>mvn clean package -DskipTests</code></p> <p>Mark <code>antlr/target/generated-sources/antlr4</code> and<code>thrift/target/generated-sources/thrift</code> as <code>Source Root</code>。</p> <h3 id="eclipse"><a href="#eclipse" class="header-anchor">#</a> Eclipse</h3> <p>If it is a version before eclipse 2019，users need to be executed in the root directory of IoTDB <code>mvn eclipse:eclipse -DskipTests</code>。</p> <p>import -> General -> Existing Projects into Workspace -> Select IoTDB root directory</p> <p>If the version after eclipse 2019</p> <p>import -> Maven -> Existing Maven Projects</p> <h2 id="debugging-code"><a href="#debugging-code" class="header-anchor">#</a> Debugging code</h2> <ul><li><p>Server main function：<code>server/src/main/java/org/apache/iotdb/db/service/IoTDB</code>, can be started in debug mode.</p></li> <li><p>Cli：<code>cli/src/main/java/org/apache/iotdb/cli/</code>，Use Cli for linux and WinCli for windows, you can start directly with the parameter "<code>-h 127.0.0.1 -p 6667 -u root -pw root</code>"</p></li> <li><p>Server rpc implementation (mainly used for cli and server communication, generally start interruption point here):<code>server/src/main/java/org/apache/iotdb/db/service/TSServiceImpl</code></p></li> <li><p>all jdbc statements：<code>executeStatement(TSExecuteStatementReq req)</code></p></li> <li><p>jdbc query：<code>executeQueryStatement(TSExecuteStatementReq req)</code></p></li> <li><p>native Write interface：<code>insertRecord(TSInsertRecordReq req)</code> <code>insertTablet(TSInsertTabletReq req)</code></p></li> <li><p>Storage engine<code>org.apache.iotdb.db.engine.StorageEngine</code></p></li> <li><p>Query engine <code>org.apache.iotdb.db.qp.QueryProcessor</code></p></li></ul> <h1 id="frequent-questions-when-compiling-the-source-code"><a href="#frequent-questions-when-compiling-the-source-code" class="header-anchor">#</a> Frequent Questions When Compiling the Source Code</h1> <p>I could not download thrift-* tools, like <code>Could not get content org.apache.maven.wagon.TransferFailedException: Transfer failed for https://github.com/apache/iotdb-bin-resources/blob/main/compile-tools/thrift-0.14-ubuntu</code></p> <p>It is due to some network problems (especially in China), you can:</p> <ul><li><p>Download the file from the URL manually;</p> <ul><li><p>https://github.com/apache/iotdb-bin-resources/blob/main/compile-tools/thrift-0.14-ubuntu</p></li> <li><p>https://github.com/apache/iotdb-bin-resources/blob/main/compile-tools/thrift-0.14-MacOS</p></li></ul></li> <li><p>Put the file to thrift/target/tools/</p></li> <li><p>Re-run maven command like <code>mvn compile</code></p></li></ul> <h2 id="recommended-debug-tool"><a href="#recommended-debug-tool" class="header-anchor">#</a> Recommended Debug Tool</h2> <p>The initial committer of IoTDB is using this <a href="https://www.ej-technologies.com/products/jprofiler/overview.html" target="_blank" rel="noopener noreferrer">Java profiler<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> to debug. Welcome all IoTDB contributors to use it.</p></div> <!----> <p style="text-align: center; color: #909399; font-size: 12px; margin: 0 30px;">Copyright © 2022 The Apache Software Foundation.<br> |
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