Java 如何从代码启动和使用ApacheFelix?
我无法从代码中找到有关启动和使用ApacheFelix的信息 我想用ApacheFelix的Shell做一些我能够(或不能)做的事情 例如,如何启动模块Java 如何从代码启动和使用ApacheFelix?,java,module,osgi,apache-felix,Java,Module,Osgi,Apache Felix,我无法从代码中找到有关启动和使用ApacheFelix的信息 我想用ApacheFelix的Shell做一些我能够(或不能)做的事情 例如,如何启动模块 请帮助。因此,在尝试了很多时间之后,这里有一个可能的解决方案 我们将有两个项目: OsgiModuleA,其中包含要启动的模块 OsgiUsage,它将使用“模块A” OsgiModuleA项目 文件模块/a/Activator.java 文件manifest.mf OsgiUsage项目 文件用法/Main.java “为什么我的服务没有
请帮助。因此,在尝试了很多时间之后,这里有一个可能的解决方案 我们将有两个项目:
- OsgiModuleA,其中包含要启动的模块
- OsgiUsage,它将使用“模块A”
“为什么我的服务没有出现”:那是什么服务?在您显示的代码中,您没有注册任何服务。请为“如何在OSGi中注册服务”打开一个新问题。创建了一个新问题:标记为正确,因为该问题是关于启动和使用Apache Felix的。有关此问题的完整答案,您可以参考此问题(killbill团队对此表示感谢)。
package module.a;
import org.osgi.framework.*;
public class Activator
implements BundleActivator, ServiceListener {
@Override
public void start(BundleContext bc)
throws Exception {
System.out.println("*** started");
bc.addServiceListener(this);
}
@Override
public void stop(BundleContext bc)
throws Exception {
bc.removeServiceListener(this);
System.out.println("*** stopped");
}
@Override
public void serviceChanged(ServiceEvent se) {
String s;
switch (se.getType()) {
case ServiceEvent.MODIFIED:
s = "modified";
break;
case ServiceEvent.REGISTERED:
s = "registered";
break;
case ServiceEvent.UNREGISTERING:
s = "unregistered";
break;
default:
s = "unknown";
}
System.out.println("= = = service changed: " + s);
}
}
Manifest-Version: 1.0
X-COMMENT: Main-Class will be added automatically by build
Bundle-Name: Module A
Bundle-Description: Module A
Bundle-Vendor: me
Bundle-Version: 1.0.0
Bundle-Activator: module.a.Activator
Import-Package: org.osgi.framework
package usage;
import java.util.*;
import org.apache.felix.framework.*;
import org.apache.felix.framework.util.*;
import org.osgi.framework.*;
public class Main {
static class HostActivator
implements BundleActivator {
private BundleContext context = null;
@Override
public void start(BundleContext bc) {
context = bc;
}
@Override
public void stop(BundleContext bc) {
context = null;
}
public BundleContext getContext() {
return context;
}
}
public static void main(String[] args)
throws Exception {
Map<String, Object> map = new HashMap<String, Object>();
map.put(Constants.FRAMEWORK_SYSTEMPACKAGES_EXTRA,
"some.module.i.dont.know; version=1.0.0");
HostActivator activator = new HostActivator();
List<Object> list = new LinkedList<Object>();
list.add(activator);
map.put(FelixConstants.SYSTEMBUNDLE_ACTIVATORS_PROP, list);
Felix f = new Felix(map);
System.out.println("starting OSGI...");
f.start();
Bundle b = f.getBundleContext().installBundle(
"file:../OsgiModuleA/dist/OsgiModuleA.jar"); // dirty path ;)
String bName = b.getLocation();
System.out.println("starting bundle " + bName);
b.start();
Set<String> inUse = new HashSet<String>();
for (ServiceReference sr : f.getServicesInUse()) {
inUse.add(sr.toString());
}
for (ServiceReference sr : f.getRegisteredServices()) {
String flag = (inUse.contains(sr.toString()) ? "[in use]" : "[ ]");
System.out.println("+ registered service: " + flag + " " + sr.toString());
}
System.out.println("stopping bundle " + bName);
b.stop();
System.out.println("uninstalling bundle " + bName);
b.uninstall();
System.out.println("stopping...");
f.stop();
f.waitForStop(1000);
}
}
starting OSGI...
starting bundle file:../OsgiModuleA/dist/OsgiModuleA.jar
*** started
+ registered service: [in use] [org.osgi.service.startlevel.StartLevel]
+ registered service: [ ] [org.osgi.service.packageadmin.PackageAdmin]
stopping bundle file:../OsgiModuleA/dist/OsgiModuleA.jar
*** stopped
uninstalling bundle file:../OsgiModuleA/dist/OsgiModuleA.jar
stopping...