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/*
* Copyright (C) 2013 The Android Open Source Project
*
* 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 com.android.documentsui;
import com.android.internal.annotations.GuardedBy;
import com.android.internal.util.Preconditions;
import com.google.android.collect.Maps;
import java.util.HashMap;
import java.util.concurrent.Executor;
import java.util.concurrent.LinkedBlockingQueue;
public class ProviderExecutor extends Thread implements Executor {
@GuardedBy("sExecutors")
private static HashMap<String, ProviderExecutor> sExecutors = Maps.newHashMap();
public static Executor forAuthority(String authority) {
synchronized (sExecutors) {
ProviderExecutor executor = sExecutors.get(authority);
if (executor == null) {
executor = new ProviderExecutor();
executor.setName("ProviderExecutor: " + authority);
executor.start();
sExecutors.put(authority, executor);
}
return executor;
}
}
private final LinkedBlockingQueue<Runnable> mQueue = new LinkedBlockingQueue<Runnable>();
@Override
public void execute(Runnable command) {
Preconditions.checkNotNull(command);
mQueue.add(command);
}
@Override
public void run() {
while (true) {
try {
final Runnable command = mQueue.take();
command.run();
} catch (InterruptedException e) {
// That was weird; let's go look for more tasks.
}
}
}
}
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