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osgi实战学习之路:3. osgi分层概念及相互合作demo

2016-01-21 16:15 274 查看

源码下载

分层:

modual:

主要作用于包级管理与共享代码

lifecycle:

主要作用于执行期间的模块管理与訪问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"?>
<project
xsi: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"?>
<project
xsi: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(參考前一篇)

启动bundle

通过下面命令查看bundle的id

list

通过下面命令,启动bundle

bundle:start 78

參考演示样例

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