/*
* 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.tomcat.util.net;
import java.util.Objects;
import java.util.concurrent.locks.Lock;
public abstract class SocketProcessorBase<S> implements Runnable {
protected SocketWrapperBase<S> socketWrapper;
protected SocketEvent event;
public SocketProcessorBase(SocketWrapperBase<S> socketWrapper, SocketEvent event) {
reset(socketWrapper, event);
}
public void reset(SocketWrapperBase<S> socketWrapper, SocketEvent event) {
Objects.requireNonNull(event);
this.socketWrapper = socketWrapper;
this.event = event;
}
@Override
public final void run() {
Lock lock = socketWrapper.getLock();
lock.lock();
try {
// It is possible that processing may be triggered for read and
// write at the same time. The lock above makes sure that processing
// does not occur in parallel. The test below ensures that if the
// first event to be processed results in the socket being closed,
// the subsequent events are not processed.
if (socketWrapper.isClosed()) {
return;
}
doRun();
} finally {
lock.unlock();
}
}
protected abstract void doRun();
}