Merge HDFS-5331 make SnapshotDiff.java to a o.a.h.util.Tool interface implementation. Contributed by Vinay.
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1533918 13f79535-47bb-0310-9956-ffa450edef68
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@ -136,6 +136,9 @@ Release 2.2.1 - UNRELEASED
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HDFS-5360. Improvement of usage message of renameSnapshot and
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HDFS-5360. Improvement of usage message of renameSnapshot and
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deleteSnapshot. (Shinichi Yamashita via wang)
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deleteSnapshot. (Shinichi Yamashita via wang)
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HDFS-5331. make SnapshotDiff.java to a o.a.h.util.Tool interface implementation.
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(Vinayakumar B via umamahesh)
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OPTIMIZATIONS
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OPTIMIZATIONS
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BUG FIXES
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BUG FIXES
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@ -20,12 +20,14 @@ package org.apache.hadoop.hdfs.tools.snapshot;
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import java.io.IOException;
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import java.io.IOException;
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import org.apache.hadoop.classification.InterfaceAudience;
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import org.apache.hadoop.classification.InterfaceAudience;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.conf.Configured;
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import org.apache.hadoop.fs.FileSystem;
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import org.apache.hadoop.fs.FileSystem;
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import org.apache.hadoop.fs.Path;
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import org.apache.hadoop.fs.Path;
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import org.apache.hadoop.hdfs.DistributedFileSystem;
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import org.apache.hadoop.hdfs.DistributedFileSystem;
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import org.apache.hadoop.hdfs.protocol.HdfsConstants;
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import org.apache.hadoop.hdfs.protocol.HdfsConstants;
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import org.apache.hadoop.hdfs.protocol.SnapshotDiffReport;
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import org.apache.hadoop.hdfs.protocol.SnapshotDiffReport;
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import org.apache.hadoop.util.Tool;
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import org.apache.hadoop.util.ToolRunner;
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/**
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/**
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* A tool used to get the difference report between two snapshots, or between
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* A tool used to get the difference report between two snapshots, or between
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@ -38,7 +40,7 @@ import org.apache.hadoop.hdfs.protocol.SnapshotDiffReport;
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* </pre>
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* </pre>
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*/
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*/
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@InterfaceAudience.Private
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@InterfaceAudience.Private
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public class SnapshotDiff {
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public class SnapshotDiff extends Configured implements Tool {
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private static String getSnapshotName(String name) {
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private static String getSnapshotName(String name) {
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if (Path.CUR_DIR.equals(name)) { // current directory
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if (Path.CUR_DIR.equals(name)) { // current directory
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return "";
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return "";
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@ -57,7 +59,8 @@ public class SnapshotDiff {
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return name.substring(i + HdfsConstants.DOT_SNAPSHOT_DIR.length() + 1);
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return name.substring(i + HdfsConstants.DOT_SNAPSHOT_DIR.length() + 1);
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}
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}
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public static void main(String[] argv) throws IOException {
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@Override
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public int run(String[] argv) throws Exception {
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String description = "SnapshotDiff <snapshotDir> <from> <to>:\n" +
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String description = "SnapshotDiff <snapshotDir> <from> <to>:\n" +
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"\tGet the difference between two snapshots, \n" +
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"\tGet the difference between two snapshots, \n" +
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"\tor between a snapshot and the current tree of a directory.\n" +
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"\tor between a snapshot and the current tree of a directory.\n" +
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@ -67,15 +70,14 @@ public class SnapshotDiff {
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if(argv.length != 3) {
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if(argv.length != 3) {
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System.err.println("Usage: \n" + description);
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System.err.println("Usage: \n" + description);
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System.exit(1);
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return 1;
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}
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}
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Configuration conf = new Configuration();
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FileSystem fs = FileSystem.get(getConf());
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FileSystem fs = FileSystem.get(conf);
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if (! (fs instanceof DistributedFileSystem)) {
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if (! (fs instanceof DistributedFileSystem)) {
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System.err.println(
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System.err.println(
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"SnapshotDiff can only be used in DistributedFileSystem");
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"SnapshotDiff can only be used in DistributedFileSystem");
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System.exit(1);
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return 1;
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}
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}
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DistributedFileSystem dfs = (DistributedFileSystem) fs;
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DistributedFileSystem dfs = (DistributedFileSystem) fs;
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@ -89,7 +91,14 @@ public class SnapshotDiff {
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} catch (IOException e) {
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} catch (IOException e) {
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String[] content = e.getLocalizedMessage().split("\n");
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String[] content = e.getLocalizedMessage().split("\n");
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System.err.println("snapshotDiff: " + content[0]);
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System.err.println("snapshotDiff: " + content[0]);
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return 1;
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}
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}
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return 0;
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}
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public static void main(String[] argv) throws Exception {
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int rc = ToolRunner.run(new SnapshotDiff(), argv);
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System.exit(rc);
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}
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}
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}
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}
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