event osgi

首先配置OSGi Framework的运行环境，我的Eclipse是3.3的，运行环境需要以下的Bundle： ? org.eclipse.osgi ? org.eclipse.equinox.ds ? org.eclipse.equinox.registry ? org.eclipse.equinox.common ? org.eclipse.equinox.log ? org.eclipse.osgi.services ? org.eclipse.equinox.event ? org.eclipse.osgi.util 操作步骤：点击菜单Run->Open Run Dialog…，在左侧的列表中，找到OSGi Framework，右键单击，New，修改Name为EventDemo，并在Bundles选项卡中，选中以上列举的Bundle，然后点击Apply，点Run。 在Console中输入ss来查看我们的环境是否成功运行： 123456789101112131415 osgi> ss Framework is launched. idState Bundle0ACTIVE org.eclipse.osgi_3.3.1.R33x_v200708281ACTIVE org.eclipse.equinox.common_3.3.0.v200704262ACTIVE org.eclipse.equinox.log_1.0.100.v200702263ACTIVE org.eclipse.equinox.ds_1.0.0.qualifier4ACTIVE org.eclipse.equinox.registry_3.3.1.R33x_v200708025ACTIVE org.eclipse.osgi.services_3.1.200.v200706056ACTIVE org.eclipse.equinox.event_1.0.100.v200705167ACTIVE org.eclipse.osgi.util_3.1.200.v20070605 osgi> OK，这样我们的Spring-OSGi的环境就启动好了，现在先关闭它。我们来建立一个Plug-in Project，命名为：EventPublisher。 首先新建一个类：com.demo.eventpublisher.Log，代码如下： 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051 package com.demo.eventpublisher; import org.osgi.framework.BundleContext;import org.osgi.service.log.LogService;import org.osgi.util.tracker.ServiceTracker; /** * Utility class with static methods for logging to LogService, if available * * @version $Revision: 1.1 $ */public class Log { static private ServiceTracker logTracker; private Log() {} public static void init(BundleContext bc) {logTracker = new ServiceTracker(bc, LogService.class.getName(), null);logTracker.open();} static void dispose() {if (logTracker != null) {logTracker.close();}logTracker = null;} public static void log(int level, String message) {log(level, message, null);、} public static void log(int level, String message, Throwable e) {LogService logService = (LogService) logTracker.getService();if (logService != null) {logService.log(level, message, e);}} public static void info(String message){info(message, null);} public static void info(String message, Throwable e){log(LogService.LOG_INFO, message, e);}} 接下来创建一个循环发布事件的线程：com.demo.eventpublisher.TimerEvent，代码如下： 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556 package com.demo.eventpublisher; import java.util.Calendar;import java.util.Hashtable; import org.osgi.framework.BundleActivator;import org.osgi.framework.BundleContext;import org.osgi.service.event.Event;import org.osgi.service.event.EventAdmin;import org.osgi.util.tracker.ServiceTracker; public class TimerEvent extends Thread implements BundleActivator { Hashtable time = new Hashtable(); ServiceTracker tracker; public TimerEvent() { super("TimerEvent"); } public void start(BundleContext context) { Log.init(context); tracker = new ServiceTracker(context, EventAdmin.class.getName(), null); tracker.open(); start(); } public void stop(BundleContext context) { interrupt(); tracker.close(); Log.dispose(); } public void run() { while (!Thread.interrupted()) try { Log.info("Rasie Event"); Calendar c = Calendar.getInstance(); set(c, Calendar.MINUTE, "minutes"); set(c, Calendar.HOUR, "hours"); set(c, Calendar.DAY_OF_MONTH, "day"); set(c, Calendar.MONTH, "month"); set(c, Calendar.YEAR, "year"); EventAdmin ea = (EventAdmin) tracker.getService(); if (ea != null) ea.sendEvent(new Event("com/demo/timer", time)); Thread.sleep(60000 - c.get(Calendar.SECOND) * 1000); } catch (InterruptedException e) { // 忽略 } } void set(Calendar c, int field, String key) { time.put(key, new Integer(c.get(field))); }} 在Plug-in ManiFest Editor中打开META-INF/MANIFEST.MF，如果安装了PDE，将会默认使用Plug-in ManiFest Editor打开。将Activator设置为com.demo.eventpublisher.TimerEvent，此时MANIFEST.MF文件中的内容如下： 1234567891011 Manifest-Version: 1.0Bundle-ManifestVersion: 2Bundle-Name: EventPublisher Plug-inBundle-SymbolicName: EventPublisherBundle-Version: 1.0.0Bundle-Activator: com.demo.eventpublisher.TimerEventImport-Package: org.osgi.framework;version="1.3.0", org.osgi.service.event;version="1.1.0", org.osgi.service.log;version="1.3.0", org.osgi.util.tracker;version="1.3.2" 注意：手工写MANIFEST.MF文件时，最后一行一定要有一个回车。 接下来我们再来建立一个Plug-in Project，命名为EventHander。 我们建立一个类，名为：com.demo.eventhandler.CustomEventHandler，代码如下 12345678910111213141516171819202122232425262728293031323334353637383940414243 package com.demo.eventhandler; import java.util.Dictionary;import java.util.Hashtable; import org.osgi.framework.BundleContext;import org.osgi.service.event.Event;import org.osgi.service.event.EventConstants;import org.osgi.service.event.EventHandler; import com.demo.internal.Log; public class CustomEventHandler implements EventHandler{ public final static String [] topics = new String[] { // "org/osgi/service/log/LogEntry/LOG_INFO", // "org/osgi/service/log/LogEntry/LOG_WARNING",// "org/osgi/framework/ServiceEvent/REGISTERED",// "org/osgi/framework/ServiceEvent/MODIFIED",// "org/osgi/framework/ServiceEvent/UNREGISTERING",// "org/osgi/framework/FrameworkEvent/STARTED",// "org/osgi/service/log/LogEntry/LOG_ERROR", "com/demo/timer"}; public void registry(BundleContext context) { Dictionary d = new Hashtable(); d.put(EventConstants.EVENT_TOPIC, topics ); context.registerService( EventHandler.class.getName(), this, d ); } public void handleEvent(Event event) { if ("com/acme/timer".equals(event.getTopic())) { Log.info("Received event, EventTopic " + event.getTopic() + " " + event.getProperty("year") + "-" + event.getProperty("month") + "-" + event.getProperty("day")); } else { Log.info("Received event, EventTopic " + event.getTopic()); } }} 我们再建立一个Activator，名为：com.demo.eventhandler.internal.Activator，代码如下 12345678910111213141516171819202122 package com.demo.internal; import org.osgi.framework.BundleActivator;import org.osgi.framework.BundleContext; import com.demo.eventhandler.CustomEventHandler; public class Activator implements BundleActivator{ public void start(BundleContext context) throws Exception { Log.init(context); CustomEventHandler eventhandler = new CustomEventHandler(); eventhandler.registry(context); } public void stop(BundleContext context) throws Exception { Log.dispose(); }} OK，我们将新建立的这两个Bundle加入到运行环境中，Run。 在Console中等待大约60秒后，输入log后可以在最后找到如下日志信息： 引用原文:-------------------------------------------------------------------------------- >Info [1] Rasie Event initial@reference:file:../../../../../../../../Documents/workspace/EventPublisher/ >Info [7] Received event, EventTopic com/demo/timer initial@reference:file:../../../../../../../../Documents/workspace/ConsumerServiceDemo/ --------------------------------------------------------------------------------瞧，我们已经收到打印出来的事件接收信息了 Received event, EventTopic com/demo/timer