/*
* Copyright 2013 MovingBlocks
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.terasology.monitoring;
import com.google.common.base.Preconditions;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.eventbus.EventBus;
import org.terasology.monitoring.impl.SingleThreadMonitor;
import org.terasology.monitoring.impl.SingleThreadMonitorImpl;
import org.terasology.monitoring.impl.ThreadActivityInternal;
import org.terasology.monitoring.impl.ThreadMonitorEvent;
import java.util.List;
import java.util.Map;
public final class ThreadMonitor {
private static final EventBus EVENT_BUS = new EventBus("ThreadMonitor");
private static final Map<Thread, SingleThreadMonitor> THREAD_INFO_BY_ID = Maps.newConcurrentMap();
private ThreadMonitor() {
}
public static ThreadActivity startThreadActivity(String activityName) {
SingleThreadMonitor monitor = getMonitor();
monitor.beginTask(activityName);
return new ThreadActivityInternal(monitor);
}
public static synchronized List<SingleThreadMonitor> getThreadMonitors(List<SingleThreadMonitor> output, boolean aliveThreadsOnly) {
Preconditions.checkNotNull(output, "The parameter 'output' must not be null");
output.clear();
for (SingleThreadMonitor entry : THREAD_INFO_BY_ID.values()) {
if (!aliveThreadsOnly || entry.isAlive()) {
output.add(entry);
}
}
return output;
}
public static synchronized List<SingleThreadMonitor> getThreadMonitors(boolean aliveThreadsOnly) {
return getThreadMonitors(Lists.<SingleThreadMonitor>newArrayList(), aliveThreadsOnly);
}
public static void registerForEvents(Object object) {
Preconditions.checkNotNull(object, "The parameter 'object' must not be null");
EVENT_BUS.register(object);
}
public static void addError(Throwable e) {
SingleThreadMonitor monitor = getMonitor();
monitor.addError(e);
}
private static SingleThreadMonitor getMonitor() {
SingleThreadMonitor monitor = THREAD_INFO_BY_ID.get(Thread.currentThread());
if (monitor == null) {
monitor = new SingleThreadMonitorImpl(Thread.currentThread());
THREAD_INFO_BY_ID.put(Thread.currentThread(), monitor);
EVENT_BUS.post(new ThreadMonitorEvent(monitor, ThreadMonitorEvent.Type.MonitorAdded));
}
return monitor;
}
}