diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/DatanodeLocalInfo.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/DatanodeLocalInfo.java new file mode 100644 index 00000000000..3ee235a3edc --- /dev/null +++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/DatanodeLocalInfo.java @@ -0,0 +1,64 @@ +/** + * 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.protocol; + +import org.apache.hadoop.classification.InterfaceAudience; +import org.apache.hadoop.classification.InterfaceStability; + + +/** + * Locally available datanode information + */ +@InterfaceAudience.Private +@InterfaceStability.Evolving +public class DatanodeLocalInfo { + private String softwareVersion; + private String configVersion; + private long uptime; // datanode uptime in seconds. + + public DatanodeLocalInfo(String softwareVersion, + String configVersion, long uptime) { + this.softwareVersion = softwareVersion; + this.configVersion = configVersion; + this.uptime = uptime; + } + + /** get software version */ + public String getSoftwareVersion() { + return this.softwareVersion; + } + + /** get config version */ + public String getConfigVersion() { + return this.configVersion; + } + + /** get uptime */ + public long getUptime() { + return this.uptime; + } + + /** A formatted string for printing the status of the DataNode. */ + public String getDatanodeLocalReport() { + StringBuilder buffer = new StringBuilder(); + buffer.append("Uptime: " + getUptime()); + buffer.append(", Software version: " + getSoftwareVersion()); + buffer.append(", Config version: " + getConfigVersion()); + return buffer.toString(); + } +}