TaskTrackerManager.java
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上传日期:2018-01-08
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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.hadoop.mapred;
- import java.io.IOException;
- import java.util.Collection;
- /**
- * Manages information about the {@link TaskTracker}s running on a cluster.
- * This interface exits primarily to test the {@link JobTracker}, and is not
- * intended to be implemented by users.
- */
- interface TaskTrackerManager {
- /**
- * @return A collection of the {@link TaskTrackerStatus} for the tasktrackers
- * being managed.
- */
- public Collection<TaskTrackerStatus> taskTrackers();
-
- /**
- * @return The number of unique hosts running tasktrackers.
- */
- public int getNumberOfUniqueHosts();
-
- /**
- * @return a summary of the cluster's status.
- */
- public ClusterStatus getClusterStatus();
- /**
- * Registers a {@link JobInProgressListener} for updates from this
- * {@link TaskTrackerManager}.
- * @param jobInProgressListener the {@link JobInProgressListener} to add
- */
- public void addJobInProgressListener(JobInProgressListener listener);
- /**
- * Unregisters a {@link JobInProgressListener} from this
- * {@link TaskTrackerManager}.
- * @param jobInProgressListener the {@link JobInProgressListener} to remove
- */
- public void removeJobInProgressListener(JobInProgressListener listener);
- /**
- * Return the {@link QueueManager} which manages the queues in this
- * {@link TaskTrackerManager}.
- *
- * @return the {@link QueueManager}
- */
- public QueueManager getQueueManager();
-
- /**
- * Return the current heartbeat interval that's used by {@link TaskTracker}s.
- *
- * @return the heartbeat interval used by {@link TaskTracker}s
- */
- public int getNextHeartbeatInterval();
- /**
- * Kill the job identified by jobid
- *
- * @param jobid
- * @throws IOException
- */
- public void killJob(JobID jobid)
- throws IOException;
- /**
- * Obtain the job object identified by jobid
- *
- * @param jobid
- * @return jobInProgress object
- */
- public JobInProgress getJob(JobID jobid);
- }