osgi实战学习之路:3. osgi分层概念及相互合作demo

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源代码下载

分层:

modual:
主要作用于包级管理与共享代码
lifecycle:
主要作用于运行期间的模块管理与访问osgi底层框架
service:
主要作用于多模块之间的相互通信

demo:

hello-provider/pom.xml

<?xml version="1.0"?><projectxsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><modelVersion>4.0.0</modelVersion><parent><groupId>com.demo</groupId><artifactId>pom</artifactId><version>0.0.1-SNAPSHOT</version></parent><artifactId>hello-provider</artifactId><packaging>bundle</packaging><name>hello-provider</name><url>http://maven.apache.org</url><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><dependencies><dependency><groupId>junit</groupId><artifactId>junit</artifactId></dependency><dependency><groupId>org.osgi</groupId><artifactId>org.osgi.core</artifactId></dependency></dependencies><build><plugins><plugin><groupId>org.apache.felix</groupId><artifactId>maven-bundle-plugin</artifactId><configuration><instructions><Export-Package>org.hello.provider</Export-Package><Import-Package>org.osgi.framework</Import-Package><Bundle-Activator>org.hello.provider.impl.UserServiceActivator</Bundle-Activator><Private-Package>org.hello.*</Private-Package></instructions></configuration></plugin></plugins></build></project>

hello-provider/BundleActivator:

package org.hello.provider.impl;import org.hello.provider.IUserService;import org.osgi.framework.BundleActivator;import org.osgi.framework.BundleContext;public class UserServiceActivator implements BundleActivator {public void start(BundleContext context) throws Exception {System.out.println("registerService......");context.registerService(IUserService.class.getName(), new UserService(), null);}public void stop(BundleContext context) throws Exception {}}

hello-client/pom.xml:

<?xml version="1.0"?><projectxsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><modelVersion>4.0.0</modelVersion><parent><groupId>com.demo</groupId><artifactId>pom</artifactId><version>0.0.1-SNAPSHOT</version></parent><artifactId>hello-client</artifactId><packaging>bundle</packaging><name>hello-client</name><url>http://maven.apache.org</url><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><dependencies><dependency><groupId>junit</groupId><artifactId>junit</artifactId></dependency><dependency><groupId>org.osgi</groupId><artifactId>org.osgi.core</artifactId></dependency><dependency><groupId>com.demo</groupId><artifactId>hello-provider</artifactId></dependency></dependencies><build><plugins><plugin><groupId>org.apache.felix</groupId><artifactId>maven-bundle-plugin</artifactId><extensions>true</extensions><configuration><instructions><Import-Package>org.hello.provider,org.osgi.framework</Import-Package><Bundle-Activator>org.hello.client.Client</Bundle-Activator><Private-Package>com.demo.hello.*</Private-Package></instructions></configuration></plugin></plugins></build></project>

hello-client/BundleActivator:

package org.hello.client;import org.hello.provider.IUserService;import org.osgi.framework.BundleActivator;import org.osgi.framework.BundleContext;import org.osgi.framework.ServiceReference;public class Client implements BundleActivator {public void start(BundleContext context) throws Exception {ServiceReference    reference=context.getServiceReference(IUserService.class.getName());System.out.println(((IUserService)context.getService(reference)).add());}public void stop(BundleContext context) throws Exception {}}

将bundle安装到本地仓库且部署到karaf(参考前一篇)

启动bundle

通过以下命令查看bundle的id
list

通过以下命令,启动bundle
bundle:start 78
参考示例

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