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/*
* Copyright 2000-2014 JetBrains s.r.o.
*
* 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.
*/
/*
* @author max
*/
package com.intellij.util.io.storage;
import com.intellij.openapi.Disposable;
import com.intellij.util.EventDispatcher;
import org.jetbrains.annotations.NotNull;
import java.util.EventListener;
import java.util.concurrent.atomic.AtomicInteger;
public class HeavyProcessLatch {
public static final HeavyProcessLatch INSTANCE = new HeavyProcessLatch();
private final AtomicInteger myHeavyProcessCounter = new AtomicInteger();
private final EventDispatcher<HeavyProcessListener> myEventDispatcher = EventDispatcher.create(HeavyProcessListener.class);
private HeavyProcessLatch() {
}
public void processStarted() {
myHeavyProcessCounter.incrementAndGet();
myEventDispatcher.getMulticaster().processStarted();
}
public void processFinished() {
myHeavyProcessCounter.decrementAndGet();
myEventDispatcher.getMulticaster().processFinished();
}
public boolean isRunning() {
return myHeavyProcessCounter.get() != 0;
}
public interface HeavyProcessListener extends EventListener {
public void processStarted();
public void processFinished();
}
public void addListener(@NotNull Disposable parentDisposable,
@NotNull HeavyProcessListener listener) {
myEventDispatcher.addListener(listener, parentDisposable);
}
}
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