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docItemCol_zHA2"><div class="theme-doc-version-banner alert alert--warning margin-bottom--md" role="alert"><div>This is documentation for <!-- -->Apache Linkis<!-- --> <b>1.0.2</b>, which is no longer actively maintained.</div><div class="margin-top--md">For up-to-date documentation, see the <b><a href="/docs/latest/architecture/public_enhancement_services/overview">latest version</a></b> (<!-- -->1.1.2<!-- -->).</div></div><div class="docItemContainer_oiyr"><article><span class="theme-doc-version-badge badge badge--secondary">Version: <!-- -->1.0.2</span><div class="tocCollapsible_aw-L theme-doc-toc-mobile tocMobile_Tx6Y"><button type="button" class="clean-btn tocCollapsibleButton_zr6a">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>PublicEnhencementService (PS) architecture design</h1></header><p>PublicEnhancementService (PS): Public enhancement service, a module that provides functions such as unified configuration management, context service, physical library, data source management, microservice management, and historical task query for other microservice modules.</p><p><img src="/assets/images/PublicEnhencementArchitecture-db0c27e2d15a4827045f158ce30b45ca.png"></p><header><h1>Introduction to the second-level module:</h1></header><h2><a aria-hidden="true" tabindex="-1" class="anchor anchor__h2 anchorWithStickyNavbar_y2LR" id="bml-material-library"></a>BML material library<a class="hash-link" href="#bml-material-library" title="Direct link to heading">#</a></h2><p>It is the linkis material management system, which is mainly used to store various file data of users, including user scripts, resource files, third-party Jar packages, etc., and can also store class libraries that need to be used when the engine runs.</p><table><thead><tr><th>Core Class</th><th>Core Function</th></tr></thead><tbody><tr><td>UploadService</td><td>Provide resource upload service</td></tr><tr><td>DownloadService</td><td>Provide resource download service</td></tr><tr><td>ResourceManager</td><td>Provides a unified management entry for uploading and downloading resources</td></tr><tr><td>VersionManager</td><td>Provides resource version marking and version management functions</td></tr><tr><td>ProjectManager</td><td>Provides project-level resource management and control capabilities</td></tr></tbody></table><h2><a aria-hidden="true" tabindex="-1" class="anchor anchor__h2 anchorWithStickyNavbar_y2LR" id="unified-configuration-management"></a>Unified configuration management<a class="hash-link" href="#unified-configuration-management" title="Direct link to heading">#</a></h2><p>Configuration provides a "user-engine-application" three-level configuration management solution, which provides users with the function of configuring custom engine parameters under various access applications.</p><table><thead><tr><th>Core Class</th><th>Core Function</th></tr></thead><tbody><tr><td>CategoryService</td><td>Provides management services for application and engine catalogs</td></tr><tr><td>ConfigurationService</td><td>Provides a unified management service for user configuration</td></tr></tbody></table><h2><a aria-hidden="true" tabindex="-1" class="anchor anchor__h2 anchorWithStickyNavbar_y2LR" id="contextservice-context-service"></a>ContextService context service<a class="hash-link" href="#contextservice-context-service" title="Direct link to heading">#</a></h2><p>ContextService is used to solve the problem of data and information sharing across multiple systems in a data application development process.</p><table><thead><tr><th>Core Class</th><th>Core Function</th></tr></thead><tbody><tr><td>ContextCacheService</td><td>Provides a cache service for context information</td></tr><tr><td>ContextClient</td><td>Provides the ability for other microservices to interact with the CSServer group</td></tr><tr><td>ContextHAManager</td><td>Provide high-availability capabilities for ContextService</td></tr><tr><td>ListenerManager</td><td>The ability to provide a message bus</td></tr><tr><td>ContextSearch</td><td>Provides query entry</td></tr><tr><td>ContextService</td><td>Implements the overall execution logic of the context service</td></tr></tbody></table><h2><a aria-hidden="true" tabindex="-1" class="anchor anchor__h2 anchorWithStickyNavbar_y2LR" id="datasource-data-source-management"></a>Datasource data source management<a class="hash-link" href="#datasource-data-source-management" title="Direct link to heading">#</a></h2><p>Datasource provides the ability to connect to different data sources for other microservices.</p><table><thead><tr><th>Core Class</th><th>Core Function</th></tr></thead><tbody><tr><td>datasource-server</td><td>Provide the ability to connect to different data sources</td></tr></tbody></table><h2><a aria-hidden="true" tabindex="-1" class="anchor anchor__h2 anchorWithStickyNavbar_y2LR" id="instancelabel-microservice-management"></a>InstanceLabel microservice management<a class="hash-link" href="#instancelabel-microservice-management" title="Direct link to heading">#</a></h2><p>InstanceLabel provides registration and labeling functions for other microservices connected to linkis.</p><table><thead><tr><th>Core Class</th><th>Core Function</th></tr></thead><tbody><tr><td>InsLabelService</td><td>Provides microservice registration and label management functions</td></tr></tbody></table><h2><a aria-hidden="true" tabindex="-1" class="anchor anchor__h2 anchorWithStickyNavbar_y2LR" id="jobhistory-historical-task-management"></a>Jobhistory historical task management<a class="hash-link" href="#jobhistory-historical-task-management" title="Direct link to heading">#</a></h2><p>Jobhistory provides users with linkis historical task query, progress, log display related functions, and provides a unified historical task view for administrators.</p><table><thead><tr><th>Core Class</th><th>Core Function</th></tr></thead><tbody><tr><td>JobHistoryQueryService</td><td>Provide historical task query service</td></tr></tbody></table><h2><a aria-hidden="true" tabindex="-1" class="anchor anchor__h2 anchorWithStickyNavbar_y2LR" id="variable-user-defined-variable-management"></a>Variable user-defined variable management<a class="hash-link" href="#variable-user-defined-variable-management" title="Direct link to heading">#</a></h2><p>Variable provides users with functions related to the storage and use of custom variables.</p><table><thead><tr><th>Core Class</th><th>Core Function</th></tr></thead><tbody><tr><td>VariableService</td><td>Provides functions related to the storage and use of custom variables</td></tr></tbody></table><h2><a aria-hidden="true" tabindex="-1" class="anchor anchor__h2 anchorWithStickyNavbar_y2LR" id="udf-user-defined-function-management"></a>UDF user-defined function management<a class="hash-link" href="#udf-user-defined-function-management" title="Direct link to heading">#</a></h2><p>UDF provides users with the function of custom functions, which can be introduced by users when writing code.</p><table><thead><tr><th>Core Class</th><th>Core Function</th></tr></thead><tbody><tr><td>UDFService</td><td>Provide user-defined function service</td></tr></tbody></table></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a href="https://github.com/apache/incubator-linkis-website/edit/dev/versioned_docs/version-1.0.2/architecture/public_enhancement_services/overview.md" target="_blank" rel="noreferrer noopener" class="theme-edit-this-page"><svg fill="currentColor" height="20" width="20" viewBox="0 0 40 40" class="iconEdit_mS5F" aria-hidden="true"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div><div class="col 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