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+/*
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+ * Licensed to the Apache Software Foundation (ASF) under one
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+ * or more contributor license agreements. See the NOTICE file
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+ * distributed with this work for additional information
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+ * regarding copyright ownership. The ASF licenses this file
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+ * to you under the Apache License, Version 2.0 (the
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+ * "License"); you may not use this file except in compliance
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+ * with the License. You may obtain a copy of the License at
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+ *
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+ * http://www.apache.org/licenses/LICENSE-2.0
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+ *
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+ * Unless required by applicable law or agreed to in writing, software
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+ * distributed under the License is distributed on an "AS IS" BASIS,
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+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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+ * See the License for the specific language governing permissions and
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+ * limitations under the License.
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+ */
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+
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+package org.apache.hadoop.yarn.util;
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+
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+import org.apache.commons.logging.Log;
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+import org.apache.commons.logging.LogFactory;
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+import org.apache.hadoop.yarn.YarnVersionAnnotation;
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+import org.apache.hadoop.classification.InterfaceAudience;
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+import org.apache.hadoop.classification.InterfaceStability;
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+
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+/**
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+ * This class finds the package info for Yarn and the YarnVersionAnnotation
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+ * information.
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+ */
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+@InterfaceAudience.Private
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+@InterfaceStability.Unstable
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+public class YarnVersionInfo {
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+ private static final Log LOG = LogFactory.getLog(YarnVersionInfo.class);
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+
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+ private static Package myPackage;
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+ private static YarnVersionAnnotation version;
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+
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+ static {
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+ myPackage = YarnVersionAnnotation.class.getPackage();
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+ version = myPackage.getAnnotation(YarnVersionAnnotation.class);
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+ }
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+
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+ /**
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+ * Get the meta-data for the Yarn package.
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+ * @return
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+ */
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+ static Package getPackage() {
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+ return myPackage;
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+ }
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+
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+ /**
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+ * Get the Yarn version.
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+ * @return the Yarn version string, eg. "0.6.3-dev"
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+ */
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+ public static String getVersion() {
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+ return version != null ? version.version() : "Unknown";
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+ }
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+
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+ /**
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+ * Get the subversion revision number for the root directory
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+ * @return the revision number, eg. "451451"
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+ */
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+ public static String getRevision() {
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+ return version != null ? version.revision() : "Unknown";
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+ }
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+
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+ /**
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+ * Get the branch on which this originated.
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+ * @return The branch name, e.g. "trunk" or "branches/branch-0.20"
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+ */
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+ public static String getBranch() {
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+ return version != null ? version.branch() : "Unknown";
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+ }
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+
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+ /**
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+ * The date that Yarn was compiled.
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+ * @return the compilation date in unix date format
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+ */
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+ public static String getDate() {
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+ return version != null ? version.date() : "Unknown";
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+ }
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+
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+ /**
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+ * The user that compiled Yarn.
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+ * @return the username of the user
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+ */
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+ public static String getUser() {
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+ return version != null ? version.user() : "Unknown";
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+ }
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+
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+ /**
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+ * Get the subversion URL for the root Yarn directory.
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+ */
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+ public static String getUrl() {
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+ return version != null ? version.url() : "Unknown";
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+ }
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+
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+ /**
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+ * Get the checksum of the source files from which Yarn was
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+ * built.
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+ **/
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+ public static String getSrcChecksum() {
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+ return version != null ? version.srcChecksum() : "Unknown";
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+ }
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+
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+ /**
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+ * Returns the buildVersion which includes version,
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+ * revision, user and date.
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+ */
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+ public static String getBuildVersion(){
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+ return YarnVersionInfo.getVersion() +
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+ " from " + YarnVersionInfo.getRevision() +
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+ " by " + YarnVersionInfo.getUser() +
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+ " source checksum " + YarnVersionInfo.getSrcChecksum();
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+ }
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+
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+ public static void main(String[] args) {
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+ LOG.debug("version: "+ version);
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+ System.out.println("Yarn " + getVersion());
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+ System.out.println("Subversion " + getUrl() + " -r " + getRevision());
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+ System.out.println("Compiled by " + getUser() + " on " + getDate());
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+ System.out.println("From source with checksum " + getSrcChecksum());
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+ }
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+}
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