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// Copyright Yahoo. 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.BundleContext;
import org.osgi.framework.ServiceReference;
import org.osgi.service.log.LogReaderService;
import org.osgi.util.tracker.ServiceTracker;
import org.osgi.util.tracker.ServiceTrackerCustomizer;
/**
* @author <a href="mailto:vikasp@yahoo-inc.com">Vikas Panwar</a>
*/
class ConsoleLogManager {
private final ConsoleLogListener listener = ConsoleLogListener.newInstance();
private ServiceTracker<LogReaderService,LogReaderService> tracker;
@SuppressWarnings("unchecked")
public void install(final BundleContext osgiContext) {
if (tracker != null) {
throw new IllegalStateException("ConsoleLogManager already installed.");
}
tracker = new ServiceTracker<LogReaderService,LogReaderService>(osgiContext, LogReaderService.class.getName(),
new ServiceTrackerCustomizer<LogReaderService,LogReaderService>() {
@Override
public LogReaderService addingService(ServiceReference<LogReaderService> reference) {
LogReaderService service = osgiContext.getService(reference);
service.addLogListener(listener);
return service;
}
@Override
public void modifiedService(ServiceReference<LogReaderService> reference, LogReaderService service) {
}
@Override
public void removedService(ServiceReference<LogReaderService> reference, LogReaderService service) {
service.removeLogListener(listener);
}
});
tracker.open();
}
public boolean uninstall() {
if (tracker == null) {
return false;
}
tracker.close();
tracker = null;
return true;
}
}
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