/**
* 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.yarn.client.api;
import java.io.IOException;
import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.classification.InterfaceAudience.Public;
import org.apache.hadoop.classification.InterfaceStability.Unstable;
import org.apache.hadoop.security.token.Token;
import org.apache.hadoop.service.AbstractService;
import org.apache.hadoop.yarn.api.records.timeline.TimelineEntity;
import org.apache.hadoop.yarn.api.records.timeline.TimelinePutResponse;
import org.apache.hadoop.yarn.client.api.impl.TimelineClientImpl;
import org.apache.hadoop.yarn.exceptions.YarnException;
import org.apache.hadoop.yarn.security.client.TimelineDelegationTokenIdentifier;
/**
* A client library that can be used to post some information in terms of a
* number of conceptual entities.
*/
@Public
@Unstable
public abstract class TimelineClient extends AbstractService {
@Public
public static TimelineClient createTimelineClient() {
TimelineClient client = new TimelineClientImpl();
return client;
}
@Private
protected TimelineClient(String name) {
super(name);
}
/**
* <p>
* Send the information of a number of conceptual entities to the timeline
* server. It is a blocking API. The method will not return until it gets the
* response from the timeline server.
* </p>
*
* @param entities
* the collection of {@link TimelineEntity}
* @return the error information if the sent entities are not correctly stored
* @throws IOException
* @throws YarnException
*/
@Public
public abstract TimelinePutResponse putEntities(
TimelineEntity... entities) throws IOException, YarnException;
/**
* <p>
* Get a delegation token so as to be able to talk to the timeline server in a
* secure way.
* </p>
*
* @param renewer
* Address of the renewer who can renew these tokens when needed by
* securely talking to the timeline server
* @return a delegation token ({@link Token}) that can be used to talk to the
* timeline server
* @throws IOException
* @throws YarnException
*/
@Public
public abstract Token<TimelineDelegationTokenIdentifier> getDelegationToken(
String renewer) throws IOException, YarnException;
}