/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.nifi.util;
import java.util.Collection;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import org.apache.nifi.controller.queue.QueueSize;
public class MockFlowFileQueue {
private final BlockingQueue<MockFlowFile> queue;
private final ReadWriteLock rwLock = new ReentrantReadWriteLock();
private final Lock readLock = rwLock.readLock();
private final Lock writeLock = rwLock.writeLock();
public MockFlowFileQueue() {
queue = new LinkedBlockingQueue<>();
}
public void offer(final MockFlowFile flowFile) {
writeLock.lock();
try {
queue.offer(flowFile);
} finally {
writeLock.unlock();
}
}
public MockFlowFile poll() {
writeLock.lock();
try {
return queue.poll();
} finally {
writeLock.unlock();
}
}
public void addAll(final Collection<MockFlowFile> flowFiles) {
writeLock.lock();
try {
queue.addAll(flowFiles);
} finally {
writeLock.unlock();
}
}
public QueueSize size() {
readLock.lock();
try {
final int count = queue.size();
long contentSize = 0L;
for (final MockFlowFile flowFile : queue) {
contentSize += flowFile.getSize();
}
return new QueueSize(count, contentSize);
} finally {
readLock.unlock();
}
}
public boolean isEmpty() {
return size().getObjectCount() == 0;
}
}