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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.jdisc.core;
import org.osgi.framework.*;
/**
* @author Simon Thoresen Hult
*/
class OsgiLogService {
private ServiceRegistration<OsgiLogService> registration;
public void start(BundleContext ctx) {
if (registration != null) {
throw new IllegalStateException();
}
ctx.addServiceListener(new ActivatorProxy(ctx));
registration = ctx.registerService(OsgiLogService.class, this, null);
}
public void stop() {
registration.unregister();
registration = null;
}
private class ActivatorProxy implements ServiceListener {
final BundleActivator activator = new org.apache.felix.log.Activator();
final BundleContext ctx;
ActivatorProxy(BundleContext ctx) {
this.ctx = ctx;
}
@Override
public void serviceChanged(ServiceEvent event) {
if (ctx.getService(event.getServiceReference()) != OsgiLogService.this) {
return;
}
switch (event.getType()) {
case ServiceEvent.REGISTERED:
try {
activator.start(ctx);
} catch (Exception e) {
throw new RuntimeException("Exception thrown while starting " +
activator.getClass().getName() + ".", e);
}
break;
case ServiceEvent.UNREGISTERING:
try {
activator.stop(ctx);
} catch (Exception e) {
throw new RuntimeException("Exception thrown while stopping " +
activator.getClass().getName() + ".", e);
}
break;
}
}
}
}
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