| /* |
| * 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); |
| } |
| } |