hadoop ReconfigurationProtocolUtils 源码
haddop ReconfigurationProtocolUtils 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/protocolPB/ReconfigurationProtocolUtils.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.hdfs.protocolPB;
import java.util.Map;
import java.util.Optional;
import org.apache.hadoop.conf.ReconfigurationTaskStatus;
import org.apache.hadoop.conf.ReconfigurationUtil.PropertyChange;
import org.apache.hadoop.hdfs.protocol.proto.ReconfigurationProtocolProtos.GetReconfigurationStatusConfigChangeProto;
import org.apache.hadoop.hdfs.protocol.proto.ReconfigurationProtocolProtos.GetReconfigurationStatusResponseProto;
import org.apache.hadoop.thirdparty.com.google.common.collect.Maps;
/**
* This is a client side utility class that handles
* common logic to to parameter reconfiguration.
*/
public final class ReconfigurationProtocolUtils {
private ReconfigurationProtocolUtils() {
}
public static ReconfigurationTaskStatus getReconfigurationStatus(
GetReconfigurationStatusResponseProto response) {
Map<PropertyChange, Optional<String>> statusMap = null;
long startTime;
long endTime = 0;
startTime = response.getStartTime();
if (response.hasEndTime()) {
endTime = response.getEndTime();
}
if (response.getChangesCount() > 0) {
statusMap = Maps.newHashMap();
for (GetReconfigurationStatusConfigChangeProto change : response
.getChangesList()) {
PropertyChange pc = new PropertyChange(change.getName(),
change.getNewValue(), change.getOldValue());
String errorMessage = null;
if (change.hasErrorMessage()) {
errorMessage = change.getErrorMessage();
}
statusMap.put(pc, Optional.ofNullable(errorMessage));
}
}
return new ReconfigurationTaskStatus(startTime, endTime, statusMap);
}
}
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