org.apache.mina.filter.codec.SynchronizedProtocolEncoder Maven / Gradle / Ivy
/*
* 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.mina.filter.codec;
import org.apache.mina.core.session.IoSession;
/**
* A {@link ProtocolEncoder} implementation which decorates an existing encoder
* to be thread-safe. Please be careful if you're going to use this decorator
* because it can be a root of performance degradation in a multi-thread
* environment. Please use this decorator only when you need to synchronize
* on a per-encoder basis instead of on a per-session basis, which is not
* common.
*
* @author Apache MINA Project
*/
public class SynchronizedProtocolEncoder implements ProtocolEncoder {
private final ProtocolEncoder encoder;
/**
* Creates a new instance which decorates the specified encoder.
* @param encoder The decorated encoder
*/
public SynchronizedProtocolEncoder(ProtocolEncoder encoder) {
if (encoder == null) {
throw new IllegalArgumentException("encoder");
}
this.encoder = encoder;
}
/**
* @return the encoder this encoder is decorating.
*/
public ProtocolEncoder getEncoder() {
return encoder;
}
/**
* {@inheritDoc}
*/
@Override
public void encode(IoSession session, Object message, ProtocolEncoderOutput out) throws Exception {
synchronized (encoder) {
encoder.encode(session, message, out);
}
}
/**
* {@inheritDoc}
*/
@Override
public void dispose(IoSession session) throws Exception {
synchronized (encoder) {
encoder.dispose(session);
}
}
}