com.hazelcast.nio.tcp.nonblocking.SelectionHandler Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2016, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.nio.tcp.nonblocking;
/**
* The SelectionHandler is a callback interface that gets called by an IO-thread when there data available to read, or space
* available to write.
*/
public interface SelectionHandler {
/**
* Called when there are bytes available for reading, or space available to write.
*
* Any exception that leads to a termination of the connection like an IOException should not be handled in the handle method
* but should be propagated. The reason behind this is that the handle logic already is complicated enough and by pulling it
* out the flow will be easier to understand.
*
* @throws Exception
*/
void handle() throws Exception;
/**
* Is called when the {@link #handle()} throws an exception.
*
* The idiom to use a handler is:
*
* try{
* handler.handle();
* } catch(Throwable t) {
* handler.onFailure(t);
* }
*
*
* @param throwable
*/
void onFailure(Throwable throwable);
}