/*
* Copyright 2012 The Netty Project
*
* The Netty Project 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 io.netty.handler.codec.marshalling;
import io.netty.channel.ChannelHandlerContext;
import org.jboss.marshalling.MarshallerFactory;
import org.jboss.marshalling.MarshallingConfiguration;
import org.jboss.marshalling.Unmarshaller;
/**
* {@link UnmarshallerProvider} implementation which use a {@link ThreadLocal} to store references
* to {@link Unmarshaller} instances. This may give you some performance boost if you need to unmarshall
* many small {@link Object}'s.
*/
public class ThreadLocalUnmarshallerProvider implements UnmarshallerProvider {
private final ThreadLocal<Unmarshaller> unmarshallers = new ThreadLocal<Unmarshaller>();
private final MarshallerFactory factory;
private final MarshallingConfiguration config;
/**
* Create a new instance of the {@link ThreadLocalUnmarshallerProvider}
*
* @param factory the {@link MarshallerFactory} to use to create {@link Unmarshaller}'s if needed
* @param config the {@link MarshallingConfiguration} to use
*/
public ThreadLocalUnmarshallerProvider(MarshallerFactory factory, MarshallingConfiguration config) {
this.factory = factory;
this.config = config;
}
@Override
public Unmarshaller getUnmarshaller(ChannelHandlerContext ctx) throws Exception {
Unmarshaller unmarshaller = unmarshallers.get();
if (unmarshaller == null) {
unmarshaller = factory.createUnmarshaller(config);
unmarshallers.set(unmarshaller);
}
return unmarshaller;
}
}