我正在尝试嵌入在我的java应用程序中使用的OSGI包。
下面是我在捆绑中唯一的java文件（我现在做的很简单）：
package it.eng.test.ds.consumer;
public class Consumer {
public void activate(){
System.out.println("I'm here, in the activate ds automatic method ;)");
}
public void deactivate()
{
System.out.println("Bye Bye!");
}
}
以下是consumer.xml：
<?xml version="1.0" encoding="UTF-8"?>
<scr:component xmlns:scr="http://www.osgi.org/xmlns/scr/v1.1.0" name="it.eng.test.ds.consumer"
activate="activate"
deactivate="deactivate"
modified="modified"
enabled="true"
immediate="true">
<implementation class="it.eng.test.ds.consumer.Consumer"/>
</scr:component>
以下是MANIFEST.MF：
Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: Ds-bundle
Bundle-SymbolicName: it.eng.test.ds.consumer
Bundle-Version: 1.0.0.qualifier
Bundle-RequiredExecutionEnvironment: JavaSE-1.7
-Component: OSGI-INF/consumer.xml
接下来，我在我的应用程序中嵌入了equinox，启动了必需的bundle（org.eclipse.equinox.ds及其依赖项），最后启动了我的名为it.eng.test.ds.consumer_1.0.0.201401071018.jar的bundle。
以下是我的申请代码：
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.ServiceLoader;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.framework.BundleException;
import org.osgi.framework.launch.Framework;
import org.osgi.framework.launch.FrameworkFactory;
public class MainEmbedder {
public static void main(String[] args)
{
FrameworkFactory frameworkFactory = ServiceLoader.load(FrameworkFactory.class).iterator().next();
Map<String, String> config = new HashMap<String, String>();
//TODO: add some config properties
Framework framework = frameworkFactory.newFramework(config);
try {
framework.start();
} catch (BundleException e) {
e.printStackTrace();
}
BundleContext context = framework.getBundleContext();
List<Bundle> installedBundles = new LinkedList<Bundle>();
try {
installedBundles.add(context.installBundle("file:C:\\Users\\student\\Desktop\\DS-Plugins\\org.eclipse.osgi.services_3.3.100.v20120522-1822.jar"));
installedBundles.add(context.installBundle("file:C:\\Users\\student\\Desktop\\DS-Plugins\\org.eclipse.equinox.util_1.0.200.v20100503.jar"));
installedBundles.add(context.installBundle(
"file:C:\\Users\\student\\Desktop\\DS-Plugins\\org.eclipse.equinox.ds_1.4.1.v20120926-201320.jar"));
installedBundles.add(context.installBundle(
"file:C:\\Users\\student\\Desktop\\DS-Plugins\\plugins\\it.eng.test.ds.consumer_1.0.0.201401071018.jar"));
} catch (BundleException e) {
e.printStackTrace();
}
for (Bundle bundle : installedBundles) {
try {
bundle.start();
} catch (BundleException e) {
e.printStackTrace();
}
}System.out.println("after starting bundles");
}
}
当我运行我的应用时，我可以看到消息"after starting bundles"，但我看不到消息"I'm here, in the activate ds automatic method ;)"。这意味着我的包没有进入activate方法。这是为什么？我怎么解决这个问题？谢谢。
更新
我尝试使用以下代码启动与Felix框架的捆绑包：
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.felix.framework.Felix;
import org.apache.felix.framework.util.FelixConstants;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.framework.BundleException;
import org.osgi.framework.Constants;
import org.osgi.framework.ServiceRegistration;
public class HostApplication
{
private HostActivator m_activator = null;
private Felix m_felix = null;
public HostApplication()
{
// Create a configuration property map.
Map config = new HashMap();
config.put(Constants.FRAMEWORK_STORAGE_CLEAN, Constants.FRAMEWORK_STORAGE_CLEAN_ONFIRSTINIT);
// Create host activator;
m_activator = new HostActivator();
List list = new ArrayList();
list.add(m_activator);
config.put(FelixConstants.SYSTEMBUNDLE_ACTIVATORS_PROP, list);
try
{
// Now create an instance of the framework with
// our configuration properties.
m_felix = new Felix(config);
// Now start Felix instance.
m_felix.start();
}
catch (Exception ex)
{
System.err.println("Could not create framework: " + ex);
ex.printStackTrace();
}
// Register the application's context as an OSGi service!
BundleContext bundleContext1 = m_felix.getBundleContext();
System.out.println("6");
try {
Bundle dsBundle = bundleContext1.installBundle("file:C:\\Users\\student\\Desktop\\DS-Plugins\\org.apache.felix.scr-1.8.0.jar");
dsBundle.start();
if(dsBundle.getState()== dsBundle.ACTIVE)
System.out.println("DS Bundle is Active!");
Bundle consumerBundle = bundleContext1.installBundle("file:C:\\Users\\student\\Desktop\\DS-Plugins\\plugins\\it.eng.test.ds.consumer_1.0.0.201401071018.jar");
consumerBundle.start();
if(consumerBundle.getState()== consumerBundle.ACTIVE)
System.out.println("Consumer Bundle is Active!");
System.out.println("done!");
} catch (BundleException e) {
e.printStackTrace();
System.out.println("Not done!");
}
shutdownApplication();
}
public Bundle[] getInstalledBundles()
{
// Use the system bundle activator to gain external
// access to the set of installed bundles.
return m_activator.getBundles();
}
public void shutdownApplication()
{
// Shut down the felix framework when stopping the
// host application.
try {
m_felix.stop();
} catch (BundleException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try {
m_felix.waitForStop(0);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
现在我收到以下错误：
ERROR: it.eng.test.ds.consumer (2): Component descriptor entry 'OSGI-INF/consumer.xml' not found.
我想我的捆绑包有问题，但它非常简单，正如我在上面描述的那样。有什么想法吗？
答案 0 :(得分：1)
我已经重播了你的设置，我已经让它工作了。
（如果所有其他方法都失败，则github仓库为here
检查OSGI-INF /是否实际在您的捆绑包中，是否将其添加到build.properties（如果您使用PDE）
问候，弗兰克
答案 1 :(得分：0)
我不确定你的确切意图是什么，但是将osgi bundle嵌入到标准的java应用程序中可能不是最好的选择。我建议将您的应用程序转换为osgi（如果可能的话，它不会太大）。如果您不能这样做，请考虑使用ds组件模拟包，例如只需手动创建组件实例并立即设置它的依赖项。但不要混淆两个世界。