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HADOOP-18444 Add Support for localized trash for ViewFileSystem in Trash.moveToAppropriateTrash (#4869)

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* HADOOP-18444 Add Support for localized trash for ViewFileSystem in Trash.moveToAppropriateTrash

Signed-off-by: Xing Lin <xinglin@linkedin.com>
This commit is contained in:
Xing Lin 2022-09-23 10:37:51 -07:00 committed by Owen O'Malley
parent af0a6d7987
commit f1c1ad52c5
2 changed files with 65 additions and 1 deletions
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23
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/Trash.java
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@ -23,8 +23,10 @@
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.viewfs.ViewFileSystem;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static org.apache.hadoop.fs.viewfs.Constants.*;
/**
* Provides a trash facility which supports pluggable Trash policies.
@ -94,6 +96,27 @@ public static boolean moveToAppropriateTrash(FileSystem fs, Path p,
LOG.warn("Failed to get server trash configuration", e);
throw new IOException("Failed to get server trash configuration", e);
}
/*
* In HADOOP-18144, we changed getTrashRoot() in ViewFileSystem to return a
* viewFS path, instead of a targetFS path. moveToTrash works for
* ViewFileSystem now. ViewFileSystem will do path resolution internally by
* itself.
*
* When localized trash flag is enabled:
* 1). if fs is a ViewFileSystem, we can initialize Trash() with a
* ViewFileSystem object;
* 2). When fs is not a ViewFileSystem, the only place we would need to
* resolve a path is for symbolic links. However, symlink is not
* enabled in Hadoop due to the complexity to support it
* (HADOOP-10019).
*/
if (conf.getBoolean(CONFIG_VIEWFS_TRASH_FORCE_INSIDE_MOUNT_POINT,
CONFIG_VIEWFS_TRASH_FORCE_INSIDE_MOUNT_POINT_DEFAULT)) {
Trash trash = new Trash(fs, conf);
return trash.moveToTrash(p);
}
Trash trash = new Trash(fullyResolvedFs, conf);
return trash.moveToTrash(fullyResolvedPath);
}

43
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/viewfs/TestViewFsTrash.java
View File

@ -17,15 +17,24 @@
*/
package org.apache.hadoop.fs.viewfs;
import java.io.DataOutputStream;
import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FileSystemTestHelper;
import org.apache.hadoop.fs.FsConstants;
import org.apache.hadoop.fs.LocalFileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.TestTrash;
import org.apache.hadoop.fs.Trash;
import org.apache.hadoop.fs.TrashPolicyDefault;
import org.apache.hadoop.fs.contract.ContractTestUtils;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import static org.apache.hadoop.fs.CommonConfigurationKeysPublic.*;
import static org.apache.hadoop.fs.viewfs.Constants.*;
import static org.junit.Assert.*;
public class TestViewFsTrash {
FileSystem fsTarget; // the target file system - the mount will point here
@ -65,5 +74,37 @@ public void testTrash() throws Exception {
TestTrash.trashShell(conf, fileSystemTestHelper.getTestRootPath(fsView),
fsView, new Path(fileSystemTestHelper.getTestRootPath(fsView), ".Trash/Current"));
}
@Test
public void testLocalizedTrashInMoveToAppropriateTrash() throws IOException {
Configuration conf2 = new Configuration(conf);
Path testFile = new Path("/data/testfile.txt");
// Enable moveToTrash and add a mount point for /data
conf2.setLong(FS_TRASH_INTERVAL_KEY, 1);
ConfigUtil.addLink(conf2, "/data", new Path(fileSystemTestHelper.getAbsoluteTestRootPath(fsTarget), "data").toUri());
// Default case. file should be moved to fsTarget.getTrashRoot()/resolvedPath
conf2.setBoolean(CONFIG_VIEWFS_TRASH_FORCE_INSIDE_MOUNT_POINT, false);
try (FileSystem fsView2 = FileSystem.get(conf2)) {
FileSystemTestHelper.createFile(fsView2, testFile);
Path resolvedFile = fsView2.resolvePath(testFile);
Trash.moveToAppropriateTrash(fsView2, testFile, conf2);
Trash trash = new Trash(fsTarget, conf2);
Path movedPath = Path.mergePaths(trash.getCurrentTrashDir(testFile), resolvedFile);
ContractTestUtils.assertPathExists(fsTarget, "File not in trash", movedPath);
}
// Turn on localized trash. File should be moved to viewfs:/data/.Trash/{user}/Current.
conf2.setBoolean(CONFIG_VIEWFS_TRASH_FORCE_INSIDE_MOUNT_POINT, true);
try (FileSystem fsView2 = FileSystem.get(conf2)) {
FileSystemTestHelper.createFile(fsView2, testFile);
Trash.moveToAppropriateTrash(fsView2, testFile, conf2);
Trash trash = new Trash(fsView2, conf2);
Path movedPath = Path.mergePaths(trash.getCurrentTrashDir(testFile), testFile);
ContractTestUtils.assertPathExists(fsView2, "File not in localized trash", movedPath);
}
}
}