/*
* Copyright 2015 Ben Manes. All Rights Reserved.
*
* 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.github.benmanes.caffeine.cache.testing;
import static java.util.Objects.requireNonNull;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.atomic.AtomicInteger;
import com.google.common.util.concurrent.ForwardingExecutorService;
/**
* An executor that retains metrics regarding the execution history.
*
* @author ben.manes@gmail.com (Ben Manes)
*/
public final class TrackingExecutor extends ForwardingExecutorService {
private final ExecutorService delegate;
private final AtomicInteger totalTasks;
private final AtomicInteger failures;
public TrackingExecutor(ExecutorService executor) {
delegate = requireNonNull(executor);
totalTasks = new AtomicInteger();
failures = new AtomicInteger();
}
@Override
public void execute(Runnable command) {
try {
delegate.execute(() -> {
try {
command.run();
} catch (Throwable t) {
failures.incrementAndGet();
throw t;
}
});
} catch (Throwable t) {
failures.incrementAndGet();
throw t;
}
}
public int totalTasksCount() {
return totalTasks.get();
}
public int failureCount() {
return failures.get();
}
@Override
protected ExecutorService delegate() {
return delegate;
}
}