/***********************************************************************************************************************
* 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.protocols;
import java.io.IOException;
import eu.stratosphere.core.protocols.VersionedProtocol;
import eu.stratosphere.nephele.instance.HardwareDescription;
import eu.stratosphere.nephele.instance.InstanceConnectionInfo;
import eu.stratosphere.nephele.taskmanager.TaskExecutionState;
/**
* The job manager protocol is implemented by the job manager and offers functionality
* to task managers which allows them to register themselves, send heart beat messages
* or to report the results of a task execution.
*
*/
public interface JobManagerProtocol extends VersionedProtocol {
/**
* Sends a heart beat to the job manager.
*
* @param instanceConnectionInfo
* the information the job manager requires to connect to the instance's task manager
* @param hardwareDescription
* a hardware description with details on the instance's compute resources.
* @throws IOException
* thrown if an error occurs during this remote procedure call
*/
void sendHeartbeat(InstanceConnectionInfo instanceConnectionInfo, HardwareDescription hardwareDescription)
throws IOException;
/**
* Reports an update of a task's execution state to the job manager.
*
* @param taskExecutionState
* the new task execution state
* @throws IOException
* thrown if an error occurs during this remote procedure call
*/
void updateTaskExecutionState(TaskExecutionState taskExecutionState) throws IOException;
}