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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.LogService;
import org.osgi.util.tracker.ServiceTracker;
import org.osgi.util.tracker.ServiceTrackerCustomizer;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.logging.Handler;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* TODO: unused, remove (not public api)
*
* @author Simon Thoresen Hult
*/
class OsgiLogManager implements LogService {
private static final Object globalLock = new Object();
private final CopyOnWriteArrayList<LogService> services = new CopyOnWriteArrayList<>();
private final boolean configureLogLevel;
private ServiceTracker<LogService,LogService> tracker;
OsgiLogManager(boolean configureLogLevel) {
this.configureLogLevel = configureLogLevel;
}
public void install(BundleContext osgiContext) {
if (tracker != null) {
throw new IllegalStateException("OsgiLogManager already installed.");
}
tracker = new ServiceTracker<>(osgiContext, LogService.class, new ServiceTrackerCustomizer<>() {
@Override
public LogService addingService(ServiceReference<LogService> reference) {
LogService service = osgiContext.getService(reference);
services.add(service);
return service;
}
@Override
public void modifiedService(ServiceReference<LogService> reference, LogService service) {
}
@Override
public void removedService(ServiceReference<LogService> reference, LogService service) {
services.remove(service);
}
});
tracker.open();
synchronized (globalLock) {
Logger root = Logger.getLogger("");
if (configureLogLevel) {
root.setLevel(Level.ALL);
}
for (Handler handler : root.getHandlers()) {
root.removeHandler(handler);
}
root.addHandler(new OsgiLogHandler(this));
}
}
public boolean uninstall() {
if (tracker == null) {
return false;
}
tracker.close(); // implicitly clears the services array
tracker = null;
return true;
}
@Override
public void log(int level, String message) {
log(null, level, message, null);
}
@Override
public void log(int level, String message, Throwable throwable) {
log(null, level, message, throwable);
}
@SuppressWarnings("rawtypes")
@Override
public void log(ServiceReference serviceRef, int level, String message) {
log(serviceRef, level, message, null);
}
@SuppressWarnings("rawtypes")
@Override
public void log(ServiceReference serviceRef, int level, String message, Throwable throwable) {
for (LogService obj : services) {
obj.log(serviceRef, level, message, throwable);
}
}
public static OsgiLogManager newInstance() {
return new OsgiLogManager(System.getProperty("java.util.logging.config.file") == null);
}
}
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