/**
* 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.mapreduce.util;
import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.classification.InterfaceStability.Unstable;
@Private
@Unstable
public class HostUtil {
/**
* Construct the taskLogUrl
* @param taskTrackerHostName
* @param httpPort
* @param taskAttemptID
* @return the taskLogUrl
*/
public static String getTaskLogUrl(String scheme, String taskTrackerHostName,
String httpPort, String taskAttemptID) {
return (scheme + taskTrackerHostName + ":" +
httpPort + "/tasklog?attemptid=" + taskAttemptID);
}
/**
* Always throws {@link RuntimeException} because this method is not
* supposed to be called at runtime. This method is only for keeping
* binary compatibility with Hive 0.13. MAPREDUCE-5830 for the details.
* @deprecated Use {@link #getTaskLogUrl(String, String, String, String)}
* to construct the taskLogUrl.
*/
@Deprecated
public static String getTaskLogUrl(String taskTrackerHostName,
String httpPort, String taskAttemptID) {
throw new RuntimeException(
"This method is not supposed to be called at runtime. " +
"Use HostUtil.getTaskLogUrl(String, String, String, String) instead.");
}
public static String convertTrackerNameToHostName(String trackerName) {
// Ugly!
// Convert the trackerName to its host name
int indexOfColon = trackerName.indexOf(":");
String trackerHostName = (indexOfColon == -1) ?
trackerName :
trackerName.substring(0, indexOfColon);
return trackerHostName.substring("tracker_".length());
}
}