1 /*
2 * Copyright 2012 The Netty Project
3 *
4 * The Netty Project licenses this file to you under the Apache License,
5 * version 2.0 (the "License"); you may not use this file except in compliance
6 * with the License. You may obtain a copy of the License at:
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations
14 * under the License.
15 */
16 package org.jboss.netty.handler.codec.marshalling;
17
18 import org.jboss.marshalling.Marshaller;
19 import org.jboss.marshalling.MarshallerFactory;
20 import org.jboss.marshalling.MarshallingConfiguration;
21 import org.jboss.netty.channel.ChannelHandlerContext;
22
23 /**
24 * {@link UnmarshallerProvider} implementation which use a {@link ThreadLocal} to store references
25 * to {@link Marshaller} instances. This may give you some performance boost if you need to marshall
26 * many small {@link Object}'s and your actual Thread count is not to big
27 *
28 *
29 *
30 *
31 */
32 public class ThreadLocalMarshallerProvider implements MarshallerProvider {
33 private final ThreadLocal<Marshaller> marshallers = new ThreadLocal<Marshaller>();
34
35 private final MarshallerFactory factory;
36 private final MarshallingConfiguration config;
37
38 /**
39 * Create a new instance of the {@link ThreadLocalMarshallerProvider}
40 *
41 * @param factory the {@link MarshallerFactory} to use to create {@link Marshaller}'s if needed
42 * @param config the {@link MarshallingConfiguration} to use
43 */
44 public ThreadLocalMarshallerProvider(MarshallerFactory factory, MarshallingConfiguration config) {
45 this.factory = factory;
46 this.config = config;
47 }
48
49 public Marshaller getMarshaller(ChannelHandlerContext ctx) throws Exception {
50 Marshaller marshaller = marshallers.get();
51 if (marshaller == null) {
52 marshaller = factory.createMarshaller(config);
53 marshallers.set(marshaller);
54 }
55 return marshaller;
56 }
57 }