org.apache.mina.core.filterchain.IoFilterChainBuilder Maven / Gradle / Ivy
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* 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.core.filterchain;
import org.apache.mina.core.session.IoSession;
/**
* An interface that builds {@link IoFilterChain} in predefined way
* when {@link IoSession} is created. You can extract common filter chain
* modification logic to this interface. For example, to add a filter
* to the chain,
*
* public class MyFilterChainBuilder implements IoFilterChainBuilder {
* public void buildFilterChain( IoFilterChain chain ) throws Exception {
* chain.addLast( "myFilter", new MyFilter() );
* }
* }
*
*
* @author Apache MINA Project
*/
public interface IoFilterChainBuilder {
/**
* An implementation which does nothing.
*/
IoFilterChainBuilder NOOP = new IoFilterChainBuilder() {
/**
* {@inheritDoc}
*/
@Override
public void buildFilterChain(IoFilterChain chain) throws Exception {
}
/**
* {@inheritDoc}
*/
@Override
public String toString() {
return "NOOP";
}
};
/**
* Modifies the specified chain.
*
* @param chain The chain to modify
* @throws Exception If the chain modification failed
*/
void buildFilterChain(IoFilterChain chain) throws Exception;
}