/*
* 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.Channel;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.util.Attribute;
import io.netty.util.AttributeKey;
import org.jboss.marshalling.MarshallerFactory;
import org.jboss.marshalling.MarshallingConfiguration;
import org.jboss.marshalling.Unmarshaller;
UnmarshallerProvider
which store a reference to the Unmarshaller
in the ChannelHandlerContext
via the ChannelHandlerContext.attr(AttributeKey<Object>)
method. So the same Unmarshaller
will be used during the life-time of a Channel
for the ChannelHandler
's ChannelHandlerContext
. /**
* {@link UnmarshallerProvider} which store a reference to the {@link Unmarshaller} in the
* {@link ChannelHandlerContext} via the {@link ChannelHandlerContext#attr(AttributeKey)}
* method. So the same {@link Unmarshaller} will be used during the life-time of a {@link Channel}
* for the {@link ChannelHandler}'s {@link ChannelHandlerContext}.
*
*
*/
public class ContextBoundUnmarshallerProvider extends DefaultUnmarshallerProvider {
private static final AttributeKey<Unmarshaller> UNMARSHALLER = AttributeKey.valueOf(
ContextBoundUnmarshallerProvider.class, "UNMARSHALLER");
public ContextBoundUnmarshallerProvider(MarshallerFactory factory, MarshallingConfiguration config) {
super(factory, config);
}
@Override
public Unmarshaller getUnmarshaller(ChannelHandlerContext ctx) throws Exception {
Attribute<Unmarshaller> attr = ctx.channel().attr(UNMARSHALLER);
Unmarshaller unmarshaller = attr.get();
if (unmarshaller == null) {
unmarshaller = super.getUnmarshaller(ctx);
attr.set(unmarshaller);
}
return unmarshaller;
}
}