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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.feedhandler;
import com.yahoo.concurrent.ThreadFactoryFactory;
import com.yahoo.document.DocumentPut;
import com.yahoo.document.DocumentRemove;
import com.yahoo.document.DocumentUpdate;
import com.yahoo.feedapi.SimpleFeedAccess;
import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.SynchronousQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
final class ThreadedFeedAccess implements SimpleFeedAccess {
private final SimpleFeedAccess simpleFeedAccess;
private final ExecutorService executorService;
private final Executor executor;
ThreadedFeedAccess(int numThreads, SimpleFeedAccess simpleFeedAccess) {
this.simpleFeedAccess = simpleFeedAccess;
if (numThreads <= 0) {
numThreads = Runtime.getRuntime().availableProcessors();
}
if (numThreads > 1) {
executorService = new ThreadPoolExecutor(numThreads, numThreads, 0L, TimeUnit.SECONDS,
new SynchronousQueue<>(false),
ThreadFactoryFactory.getDaemonThreadFactory("feeder"),
new ThreadPoolExecutor.CallerRunsPolicy());
executor = executorService;
} else {
executorService = null;
executor = new Executor() {
@Override
public void execute(Runnable command) {
command.run();
}
};
}
}
@Override
public void put(DocumentPut doc) {
executor.execute(() -> simpleFeedAccess.put(doc));
}
@Override
public void remove(DocumentRemove remove) {
executor.execute(() -> simpleFeedAccess.remove(remove));
}
@Override
public void update(DocumentUpdate update) {
executor.execute(() -> simpleFeedAccess.update(update));
}
@Override
public boolean isAborted() {
return simpleFeedAccess.isAborted();
}
@Override
public void close() {
if (executorService != null) {
executorService.shutdown();
}
}
}
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