| <!DOCTYPE html> |
| <html lang="en"> |
| <head> |
| <meta charset="utf-8"> |
| <meta name="viewport" content="width=device-width,initial-scale=1"> |
| <title>Dependency Manager - Configuration Dependency :: Apache Felix</title> |
| <link rel="canonical" href="https://felix.apache.org/documentation/subprojects/apache-felix-dependency-manager/reference/dependency-configuration.html"> |
| <meta name="generator" content="Antora 2.3.4"> |
| <link rel="stylesheet" href="../../../../_/css/site.css"> |
| <link rel="icon" href="../../../../_/img/favicon.png" type="image/x-icon"> |
| </head> |
| <body class="article"> |
| <header class="header"> |
| <nav class="navbar"> |
| <div class="navbar-brand"> |
| <a class="navbar-item" href="https://felix.apache.org/index.html"> |
| <span> |
| <img src="../../../../_/img/logo.png"> |
| </span> |
| </a> |
| <button class="navbar-burger" data-target="topbar-nav"> |
| <span></span> |
| <span></span> |
| <span></span> |
| </button> |
| </div> |
| <div id="topbar-nav" class="navbar-menu"> |
| <div class="navbar-end"> |
| <a class="navbar-item" href="https://felix.apache.org/index.html">Home</a> |
| <div class="navbar-item has-dropdown is-hoverable"> |
| <a class="navbar-link" href="#">Subprojects</a> |
| <div class="navbar-dropdown"> |
| <a class="navbar-item" href="../../apache-felix-dependency-manager.html">Dependency Manager</a> |
| <a class="navbar-item" href="../../apache-felix-event-admin.html">Event Admin</a> |
| <a class="navbar-item" href="../../apache-felix-file-install.html">File Install</a> |
| <a class="navbar-item" href="../../apache-felix-framework.html">Framework</a> |
| <a class="navbar-item" href="../../apache-felix-gogo.html">Gogo Shell</a> |
| <a class="navbar-item" href="../../apache-felix-healthchecks.html">Health Checks</a> |
| <a class="navbar-item" href="../../apache-felix-inventory.html">Inventory</a> |
| <a class="navbar-item" href="../../apache-felix-log.html">Log</a> |
| <a class="navbar-item" href="../../apache-felix-logback.html">Logback</a> |
| <a class="navbar-item" href="../../apache-felix-maven-bundle-plugin.html">Maven bundle plugin</a> |
| <a class="navbar-item" href="../../apache-felix-maven-scr-plugin.html">Maven SCR plugin</a> |
| <a class="navbar-item" href="../../apache-felix-metatype-service.html">Metatype Service</a> |
| <a class="navbar-item" href="../../apache-felix-preferences-service.html">Preferences Service</a> |
| <a class="navbar-item" href="../../apache-felix-remote-shell.html">Remote Shell</a> |
| <a class="navbar-item" href="../../apache-felix-script-console-plugin.html">Script console plugin</a> |
| <a class="navbar-item" href="../../apache-felix-shell.html">Lightweight shell</a> |
| <a class="navbar-item" href="../../apache-felix-shell-tui.html">Shell TUI</a> |
| <a class="navbar-item" href="../../apache-felix-web-console.html">Web Console</a> |
| </div> |
| </div> |
| <div class="navbar-item"> |
| <span class="control"> |
| <a class="button is-primary" href="../../../downloads.html">Downloads</a> |
| </span> |
| </div> |
| </div> |
| </div> |
| </nav> |
| </header> |
| <div class="body"> |
| <div class="nav-container" data-component="documentation" data-version="master"> |
| <aside class="nav"> |
| <div class="panels"> |
| <div class="nav-panel-menu is-active" data-panel="menu"> |
| <nav class="nav-menu"> |
| <h3 class="title"><a href="../../../index.html">Documentation</a></h3> |
| <ul class="nav-list"> |
| <li class="nav-item" data-depth="0"> |
| <ul class="nav-list"> |
| <li class="nav-item" data-depth="1"> |
| <a class="nav-link" href="../../../documentation.html">Documentation</a> |
| </li> |
| <li class="nav-item" data-depth="1"> |
| <a class="nav-link" href="../../../downloads.html">Downloads</a> |
| </li> |
| <li class="nav-item" data-depth="1"> |
| <a class="nav-link" href="../../../getting-started.html">Getting Started</a> |
| </li> |
| <li class="nav-item" data-depth="1"> |
| <a class="nav-link" href="../../../news.html">News</a> |
| </li> |
| <li class="nav-item" data-depth="1"> |
| <button class="nav-item-toggle"></button> |
| <span class="nav-text">Community</span> |
| <ul class="nav-list"> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../../community/project-info.html">Apache Felix Project Info</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../../community/contributing.html">Contributing</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../../community/projects-using-felix.html">Projects Using Felix</a> |
| </li> |
| </ul> |
| </li> |
| <li class="nav-item" data-depth="1"> |
| <button class="nav-item-toggle"></button> |
| <span class="nav-text">Development</span> |
| <ul class="nav-list"> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../../development/coding-standards.html">Coding Standards</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../../development/dependencies-file-template.html">DEPENDENCIES file template</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../../development/provisional-osgi-api-policy.html">Provisional OSGi API Policy</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../../development/release-management-nexus.html">Release Management</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../../development/site-how-to.html">Site How To</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../../development/using-the-osgi-compliance-tests.html">Using the OSGi Compliance Tests</a> |
| </li> |
| </ul> |
| </li> |
| <li class="nav-item" data-depth="1"> |
| <button class="nav-item-toggle"></button> |
| <a class="nav-link" href="../../../faqs.html">FAQS</a> |
| <ul class="nav-list"> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../../faqs/apache-felix-bundle-plugin-faq.html">Apache Felix Bundle Plugin Frequently Asked Questions</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../../faqs/apache-felix-scr-plugin-faq.html">Apache Felix SCR Plugin Frequently Asked Questions</a> |
| </li> |
| </ul> |
| </li> |
| <li class="nav-item" data-depth="1"> |
| <button class="nav-item-toggle"></button> |
| <a class="nav-link" href="../../../subprojects.html">Subprojects</a> |
| <ul class="nav-list"> |
| <li class="nav-item" data-depth="2"> |
| <button class="nav-item-toggle"></button> |
| <a class="nav-link" href="../../apache-felix-dependency-manager.html">Apache Felix Dependency Manager</a> |
| <ul class="nav-list"> |
| <li class="nav-item" data-depth="3"> |
| <button class="nav-item-toggle"></button> |
| <span class="nav-text">Guides</span> |
| <ul class="nav-list"> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="../guides/migrating-from-earlier-versions.html">Apache Felix Dependency Manager - Migrating from earlier versions</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="../guides/annotations.html">Dependency Manager - Annotations</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="../guides/background.html">Dependency Manager - Background</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="../guides/bundles-and-dependencies.html">Dependency Manager - Bundles and Dependencies</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="../guides/design-patterns.html">Dependency Manager - Design Patterns</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="../guides/development.html">Dependency Manager - Development</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="../guides/history.html">Dependency Manager - History</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="../guides/javadocs.html">Dependency Manager - JavaDocs</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="../guides/migrating-from-other-solutions.html">Dependency Manager - Migrating from other solutions.</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="../guides/performance-tuning.html">Dependency Manager - Performance Tuning</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="../guides/resources.html">Dependency Manager - Resource adapters</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="../guides/whatsnew.html">Dependency Manager - What’s new in version 4?</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="../guides/dm-lambda.html">Dependency Manager Lambda</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="../guides/whatsnew-r15.html">What’s New in R15</a> |
| </li> |
| </ul> |
| </li> |
| <li class="nav-item" data-depth="3"> |
| <button class="nav-item-toggle"></button> |
| <span class="nav-text">Reference</span> |
| <ul class="nav-list"> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="component-adapter.html">Dependency Manager - Adapter</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="component-aspect.html">Dependency Manager - Aspect</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="component-bundle-adapter.html">Dependency Manager - Bundle Adapter</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="dependency-bundle.html">Dependency Manager - Bundle Dependency</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="components.html">Dependency Manager - Components</a> |
| </li> |
| <li class="nav-item is-current-page" data-depth="4"> |
| <a class="nav-link" href="dependency-configuration.html">Dependency Manager - Configuration Dependency</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="dependencies.html">Dependency Manager - Dependencies</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="external-links.html">Dependency Manager - External Links</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="component-factory-configuration-adapter.html">Dependency Manager - Factory Configuration Adapter Service</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="component-resource-adapter.html">Dependency Manager - Resource Adapter</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="dependency-resource.html">Dependency Manager - Resource Dependency</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="dependency-service.html">Dependency Manager - Service Dependency</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="service-scopes.html">Dependency Manager - Service Scopes</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="component-singleton.html">Dependency Manager - Singleton Component</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="thread-model.html">Dependency Manager - Thread Model</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="dm-annotations.html">Dependency Manager Annotations</a> |
| </li> |
| </ul> |
| </li> |
| <li class="nav-item" data-depth="3"> |
| <button class="nav-item-toggle"></button> |
| <span class="nav-text">Tutorials</span> |
| <ul class="nav-list"> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="../tutorials/working-with-annotations.html">Dependency Manager - Annotations</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="../tutorials/getting-started.html">Dependency Manager - Getting Started</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="../tutorials/leveraging-the-shell.html">Dependency Manager - Leveraging the shell</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="../tutorials/sample-code.html">Dependency Manager sample projects</a> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../apache-felix-event-admin.html">Apache Felix Event Admin</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../apache-felix-file-install.html">Apache Felix File Install</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <button class="nav-item-toggle"></button> |
| <a class="nav-link" href="../../apache-felix-framework.html">Apache Felix Framework</a> |
| <ul class="nav-list"> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../apache-felix-framework/apache-felix-framework-bundle-cache.html">Apache Felix Framework Bundle Cache</a> |
| </li> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../apache-felix-framework/apache-felix-framework-configuration-properties.html">Apache Felix Framework Configuration Properties</a> |
| </li> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../apache-felix-framework/apache-felix-framework-faq.html">Apache Felix Framework Frequently Asked Questions</a> |
| </li> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../apache-felix-framework/apache-felix-framework-launching-and-embedding.html">Apache Felix Framework Launching and Embedding</a> |
| </li> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../apache-felix-framework/apache-felix-framework-usage-documentation.html">Apache Felix Framework Usage Documentation</a> |
| </li> |
| </ul> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../apache-felix-framework-security.html">Apache Felix Framework Security</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <button class="nav-item-toggle"></button> |
| <a class="nav-link" href="../../apache-felix-gogo.html">Apache Felix Gogo</a> |
| <ul class="nav-list"> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../apache-felix-gogo/rfc-147-overview.html">RFC 147 Overview</a> |
| </li> |
| </ul> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../apache-felix-healthchecks.html">Apache Felix Health Checks</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../apache-felix-inventory.html">Apache Felix Inventory Printer</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../apache-felix-log.html">Apache Felix Log</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../apache-felix-logback.html">Apache Felix Logback</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../apache-felix-maven-bundle-plugin-bnd.html">Apache Felix Maven Bundle Plugin (BND)</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../apache-felix-metatype-service.html">Apache Felix Metatype Service</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../apache-felix-osgi-bundle-repository.html">Apache Felix OSGi Bundle Repository (OBR)</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../apache-felix-preferences-service.html">Apache Felix Preferences Service</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../apache-felix-remote-shell.html">Apache Felix Remote Shell</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../apache-felix-shell.html">Apache Felix Shell</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../apache-felix-shell-tui.html">Apache Felix Shell TUI</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <button class="nav-item-toggle"></button> |
| <a class="nav-link" href="../../apache-felix-web-console.html">Apache Felix Web Console</a> |
| <ul class="nav-list"> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../apache-felix-web-console/extending-the-apache-felix-web-console.html">Extending the Apache Felix Web Console</a> |
| </li> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../apache-felix-web-console/web-console-restful-api.html">Web Console RESTful API</a> |
| </li> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../apache-felix-web-console/web-console-security-provider.html">Web Console Security Provider</a> |
| </li> |
| <li class="nav-item" data-depth="3"> |
| <button class="nav-item-toggle"></button> |
| <span class="nav-text">Extensions</span> |
| <ul class="nav-list"> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="../../apache-felix-web-console/extending-the-apache-felix-web-console/branding-the-web-console.html">Branding the Web Console</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="../../apache-felix-web-console/extending-the-apache-felix-web-console/providing-resources.html">Providing Resources</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="../../apache-felix-web-console/extending-the-apache-felix-web-console/providing-web-console-plugins.html">Providing Web Console Plugins</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="../../apache-felix-web-console/extending-the-apache-felix-web-console/web-console-logging.html">Web Console Logging</a> |
| </li> |
| <li class="nav-item" data-depth="4"> |
| <a class="nav-link" href="../../apache-felix-web-console/extending-the-apache-felix-web-console/web-console-output-templating.html">Web Console Output Templating</a> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <button class="nav-item-toggle"></button> |
| <span class="nav-text">Maven SCR plugin</span> |
| <ul class="nav-list"> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../apache-felix-maven-scr-plugin/apache-felix-maven-scr-plugin-use.html">Apache Felix Maven SCR Plugin Use</a> |
| </li> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../apache-felix-maven-scr-plugin/apache-felix-scr-bndtools-use.html">Apache Felix SCR Annotations BndTools Use</a> |
| </li> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../apache-felix-maven-scr-plugin/apache-felix-scr-ant-task-use.html">Apache Felix SCR Ant Task Use</a> |
| </li> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../apache-felix-maven-scr-plugin/extending-scr-annotations.html">Extending SCR Annotations Excerpt: How add new Annotations extending the base Annotations</a> |
| </li> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../apache-felix-maven-scr-plugin/scr-annotations.html">SCR Annotations Excerpt: Using Java 5 Annotations to describe the component or service.</a> |
| </li> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../apache-felix-maven-scr-plugin/scr-javadoc-tags.html">SCR JavaDoc Tags Excerpt: Using JavaDoc Tags to describe the component or service.</a> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| <li class="nav-item" data-depth="1"> |
| <button class="nav-item-toggle"></button> |
| <a class="nav-link" href="../../../tutorials-examples-and-presentations.html">Tutorials</a> |
| <ul class="nav-list"> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../../tutorials-examples-and-presentations/apache-felix-application-demonstration.html">Apache Felix Application Demonstration</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../../tutorials-examples-and-presentations/apache-felix-osgi-tutorial.html">Apache Felix OSGi Tutorial</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <a class="nav-link" href="../../../tutorials-examples-and-presentations/apache-felix-osgi-faq.html">OSGi Frequently Asked Questions</a> |
| </li> |
| <li class="nav-item" data-depth="2"> |
| <button class="nav-item-toggle"></button> |
| <span class="nav-text">OSGI Tutorial</span> |
| <ul class="nav-list"> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../../tutorials-examples-and-presentations/apache-felix-osgi-tutorial/apache-felix-tutorial-example-1.html">Apache Felix Tutorial Example 1 - Service Event Listener Bundle</a> |
| </li> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../../tutorials-examples-and-presentations/apache-felix-osgi-tutorial/apache-felix-tutorial-example-2.html">Apache Felix Tutorial Example 2</a> |
| </li> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../../tutorials-examples-and-presentations/apache-felix-osgi-tutorial/apache-felix-tutorial-example-2b.html">Apache Felix Tutorial Example 2b</a> |
| </li> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../../tutorials-examples-and-presentations/apache-felix-osgi-tutorial/apache-felix-tutorial-example-3.html">Apache Felix Tutorial Example 3</a> |
| </li> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../../tutorials-examples-and-presentations/apache-felix-osgi-tutorial/apache-felix-tutorial-example-4.html">Apache Felix Tutorial Example 4</a> |
| </li> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../../tutorials-examples-and-presentations/apache-felix-osgi-tutorial/apache-felix-tutorial-example-5.html">Apache Felix Tutorial Example 5</a> |
| </li> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../../tutorials-examples-and-presentations/apache-felix-osgi-tutorial/apache-felix-tutorial-example-6.html">Example 6 - Spell Checker Service Bundle</a> |
| </li> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../../tutorials-examples-and-presentations/apache-felix-osgi-tutorial/apache-felix-tutorial-example-7.html">Example 7 - Spell Checker Client Bundle</a> |
| </li> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../../tutorials-examples-and-presentations/apache-felix-osgi-tutorial/apache-felix-tutorial-example-8.html">Example 8 - Spell Checker Service using Service Binder</a> |
| </li> |
| <li class="nav-item" data-depth="3"> |
| <a class="nav-link" href="../../../tutorials-examples-and-presentations/apache-felix-osgi-tutorial/apache-felix-tutorial-example-9.html">Example 9 - Spell Checker Service using Declarative Services</a> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| <li class="nav-item" data-depth="1"> |
| <a class="nav-link" href="../../../license.html">Apache License 2.0</a> |
| </li> |
| <li class="nav-item" data-depth="1"> |
| <a class="nav-link" href="../../../site-map.html">Site map</a> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </nav> |
| </div> |
| <div class="nav-panel-explore" data-panel="explore"> |
| <div class="context"> |
| <span class="title">Documentation</span> |
| <span class="version">master</span> |
| </div> |
| <ul class="components"> |
| <li class="component is-current"> |
| <span class="title">Documentation</span> |
| <ul class="versions"> |
| <li class="version is-current is-latest"> |
| <a href="../../../index.html">master</a> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| </div> |
| </aside> |
| </div> |
| <main class="article"> |
| <div class="toolbar" role="navigation"> |
| <button class="nav-toggle"></button> |
| <a href="../../../index.html" class="home-link"></a> |
| <nav class="breadcrumbs" aria-label="breadcrumbs"> |
| <ul> |
| <li><a href="../../../index.html">Documentation</a></li> |
| <li><a href="../../../subprojects.html">Subprojects</a></li> |
| <li><a href="../../apache-felix-dependency-manager.html">Apache Felix Dependency Manager</a></li> |
| <li>Reference</li> |
| <li><a href="dependency-configuration.html">Dependency Manager - Configuration Dependency</a></li> |
| </ul> |
| </nav> |
| <div class="edit-this-page"><a href="https://github.com/apache/felix-antora-site/edit/main/modules/ROOT/pages/subprojects/apache-felix-dependency-manager/reference/dependency-configuration.adoc">Edit this Page</a></div> |
| </div> |
| <div class="content"> |
| <article class="doc"> |
| <h1 class="page">Dependency Manager - Configuration Dependency</h1> |
| <div class="paragraph"> |
| <p>A configuration dependency is always required, and allows you to depend on the availability of a valid configuration for your component. |
| Configuration dependency is required by default.</p> |
| </div> |
| <div class="paragraph"> |
| <p>To define a configuration dependency, you need to use the <a href="http://felix.apache.org/apidocs/dependencymanager/r13/org/apache/felix/dm/ConfigurationDependency.html">ConfigurationDependency</a> interface. |
| This interface can be created using DependencyActivatorBase.createConfigurationDependency() or DependencyManager.createConfigurationDependency() methods.</p> |
| </div> |
| <div class="paragraph"> |
| <p>The dependency injects by default the configuration in an "updated" callback which can accept the following parameters:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p><code>updated(Dictionary)</code></p> |
| </li> |
| <li> |
| <p><code>updated(Component, Dictionary)</code></p> |
| </li> |
| <li> |
| <p><code>updated(<ConfigurationType>)</code></p> |
| </li> |
| <li> |
| <p><code>updated(Component, <ConfigurationType>)</code></p> |
| </li> |
| </ul> |
| </div> |
| <div class="paragraph"> |
| <p>If you only specify a pid, by default the callback method name is assumed to be "updated".</p> |
| </div> |
| <div class="paragraph"> |
| <p>Configuration types are a new feature that allows you to specify a Java interface that is implemented by DM and such interface is then injected to your callback instead of the actual Dictionary. |
| Using such configuration interface provides a way for creating type-safe configurations from a actual Dictionary that is normally injected by Dependency Manager. |
| The callback accepts in argument an interface that you have to provide, and DM will inject a proxy that converts method calls from your configuration-type to lookups in the actual map or dictionary. |
| The results of these lookups are then converted to the expected return type of the invoked configuration method. |
| As proxies are injected, no implementations of the desired configuration-type are necessary!</p> |
| </div> |
| <div class="paragraph"> |
| <p>The lookups performed are based on the name of the method called on the configuration type. |
| The method names are "mangled" to the following form: [lower case letter] [any valid character]*. |
| Method names starting with get or is (JavaBean convention) are stripped from these prefixes. |
| For example: given a dictionary with the key "foo" can be accessed from a configuration-type using the following method names: foo(), getFoo() and isFoo().</p> |
| </div> |
| <div class="paragraph"> |
| <p>The return values supported are:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>primitive types (or their object wrappers);</p> |
| </li> |
| <li> |
| <p>strings;</p> |
| </li> |
| <li> |
| <p>enums;</p> |
| </li> |
| <li> |
| <p>arrays of primitives/strings;</p> |
| </li> |
| <li> |
| <p>Collection types;</p> |
| </li> |
| <li> |
| <p>Map types;</p> |
| </li> |
| <li> |
| <p>Classes and interfaces.</p> |
| </li> |
| </ul> |
| </div> |
| <div class="paragraph"> |
| <p>When an interface is returned, it is treated equally to a configuration type, that is, a proxy is returned.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Arrays can be represented either as comma-separated values, optionally enclosed in square brackets. |
| For example: <code>[ a, b, c ]</code> and <code>a, b,c</code> are both considered an array of length 3 with the values "a", "b" and "c". |
| Alternatively, you can append the array index to the key in the dictionary to obtain the same: a dictionary with "arr.0" => "a", "arr.1" => "b", "arr.2" => "c" would result in the same array as the earlier examples.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Maps can be represented as single string values similarly as arrays, each value consisting of both the key and value separated by a dot. |
| Optionally, the value can be enclosed in curly brackets. |
| Similar to array, you can use the same dot notation using the keys. |
| For example, a dictionary with:</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre>map={key1.value1,key2.value2}</pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>and a dictionary with:</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre>map.key1=value1 |
| map.key2=value2</pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>result in the <em>same</em> map being returned. |
| Instead of a map, you could also define an interface with the methods <code>getKey1()</code> and <code>getKey2()</code> and use that interface as return type instead of a Map.</p> |
| </div> |
| <div class="paragraph"> |
| <p>In case a lookup does not yield a value from the underlying map or dictionary, the following rules are applied:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>primitive types yield their default value, as defined by the Java Specification;</p> |
| </li> |
| <li> |
| <p>string, Classes and enum values yield <code>null</code>;</p> |
| </li> |
| <li> |
| <p>for arrays, collections and maps, an <em>empty</em> array/collection/map is returned;</p> |
| </li> |
| <li> |
| <p>for other interface types that are treated as configuration type a Null-object is returned.</p> |
| </li> |
| </ul> |
| </div> |
| <div class="paragraph"> |
| <p>Here is a component depends on a configuration:</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">public class ServiceImpl { |
| void updated(Dictionary<String, Object> cnf) { |
| if (cnf != null) { |
| String addr = (String) cnf.get("address"); |
| int port = Integer.valueOf(cnf.get("port"); |
| ... |
| } |
| } |
| } |
| |
| public class Activator extends DependencyActivatorBase { |
| @Override |
| public void init(BundleContext ctx, DependencyManager dm) throws Exception { |
| dm.add(createComponent() |
| .setImplementation(ServiceImpl.class) |
| .add(createConfigurationDependency().setPid(ServiceImpl.class.getName())); |
| } |
| }</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>Here is the same example, but a custom configuration type interface is used (by default, the FQDN of the configuration type is assumed to be the configuration pid):</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">public interface MyConfig { |
| String getAddress(); |
| int getPort(); |
| } |
| |
| public class ServiceImpl { |
| void modified(MyConfig cnf) { |
| if (cnf != null) { |
| String addr = cnf.getAddress(); |
| int port = cnf.getPort(); |
| ... |
| } |
| } |
| } |
| |
| public class Activator extends DependencyActivatorBase { |
| @Override |
| public void init(BundleContext ctx, DependencyManager dm) throws Exception { |
| dm.add(createComponent() |
| .setImplementation(ServiceImpl.class) |
| .add(createConfigurationDependency().setCallback("modified", MyConfig.class); |
| } |
| }</code></pre> |
| </div> |
| </div> |
| </article> |
| <aside class="toc sidebar" data-title="Contents" data-levels="2"> |
| <div class="toc-menu"></div> |
| </aside> |
| </div> |
| </main> |
| </div> |
| <footer class="footer"> |
| <p>Content licensed under AL2. UI licensed under MPL-2.0 with extensions licensed under AL2</p> |
| </footer> |
| <script src="../../../../_/js/site.js"></script> |
| <script async src="../../../../_/js/vendor/highlight.js"></script> |
| </body> |
| </html> |
