/***********************************************************************************************************************
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* 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 eu.stratosphere.nephele.services.iomanager;
import java.io.IOException;
/**
* Basic interface that I/O requests that are sent to the threads of the I/O manager need to implement.
*
*/
interface IORequest
{
/**
* Method that is called by the target I/O thread after the request has been processed.
*
* @param ioex The exception that occurred while processing the I/O request. Is <tt>null</tt> if everything
* was fine.
*/
public void requestDone(IOException ioex);
}
/**
* Interface for I/O requests that are handled by the IOManager's reading thread.
*/
interface ReadRequest extends IORequest
{
/**
* Called by the target I/O thread to perform the actual reading operation.
*
* @throws IOException My be thrown by the method to indicate an I/O problem.
*/
public void read() throws IOException;
}
/**
* Interface for I/O requests that are handled by the IOManager's writing thread.
*/
interface WriteRequest extends IORequest
{
/**
* Called by the target I/O thread to perform the actual writing operation.
*
* @throws IOException My be thrown by the method to indicate an I/O problem.
*/
public void write() throws IOException;
}