hadoop AppToFlowRowKey 源码
haddop AppToFlowRowKey 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/hadoop-yarn-server-timelineservice-hbase-common/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/apptoflow/AppToFlowRowKey.java
/**
* 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.server.timelineservice.storage.apptoflow;
import org.apache.hadoop.yarn.server.timelineservice.storage.common.AppIdKeyConverter;
import org.apache.hadoop.yarn.server.timelineservice.storage.common.KeyConverter;
/**
* Represents a row key for the app_flow table, which is the app id.
*/
public class AppToFlowRowKey {
private final String appId;
private final KeyConverter<String> appIdKeyConverter =
new AppIdKeyConverter();
public AppToFlowRowKey(String appId) {
this.appId = appId;
}
public String getAppId() {
return appId;
}
/**
* Constructs a row key prefix for the app_flow table.
*
* @return byte array with the row key
*/
public byte[] getRowKey() {
return appIdKeyConverter.encode(appId);
}
/**
* Given the raw row key as bytes, returns the row key as an object.
*
* @param rowKey a rowkey represented as a byte array.
* @return an <cite>AppToFlowRowKey</cite> object.
*/
public static AppToFlowRowKey parseRowKey(byte[] rowKey) {
String appId = new AppIdKeyConverter().decode(rowKey);
return new AppToFlowRowKey(appId);
}
}
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