本文整理匯總了Java中org.apache.hadoop.hdfs.DistributedFileSystem.getSnapshottableDirListing方法的典型用法代碼示例。如果您正苦於以下問題：Java DistributedFileSystem.getSnapshottableDirListing方法的具體用法？Java DistributedFileSystem.getSnapshottableDirListing怎麽用？Java DistributedFileSystem.getSnapshottableDirListing使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類org.apache.hadoop.hdfs.DistributedFileSystem的用法示例。
在下文中一共展示了DistributedFileSystem.getSnapshottableDirListing方法的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: run
import org.apache.hadoop.hdfs.DistributedFileSystem; //導入方法依賴的package包/類
@Override
public int run(String[] argv) throws Exception {
String description = "hdfs lsSnapshottableDir: \n" +
"\tGet the list of snapshottable directories that are owned by the current user.\n" +
"\tReturn all the snapshottable directories if the current user is a super user.\n";
if(argv.length != 0) {
System.err.println("Usage: \n" + description);
return 1;
}
FileSystem fs = FileSystem.get(getConf());
if (! (fs instanceof DistributedFileSystem)) {
System.err.println(
"LsSnapshottableDir can only be used in DistributedFileSystem");
return 1;
}
DistributedFileSystem dfs = (DistributedFileSystem) fs;
try {
SnapshottableDirectoryStatus[] stats = dfs.getSnapshottableDirListing();
SnapshottableDirectoryStatus.print(stats, System.out);
} catch (IOException e) {
String[] content = e.getLocalizedMessage().split("\n");
System.err.println("lsSnapshottableDir: " + content[0]);
return 1;
}
return 0;
}
示例2: testListWithDifferentUser
import org.apache.hadoop.hdfs.DistributedFileSystem; //導入方法依賴的package包/類
/**
* Test the listing with different user names to make sure only directories
* that are owned by the user are listed.
*/
@Test (timeout=60000)
public void testListWithDifferentUser() throws Exception {
cluster.getNamesystem().getSnapshotManager().setAllowNestedSnapshots(true);
// first make dir1 and dir2 snapshottable
hdfs.allowSnapshot(dir1);
hdfs.allowSnapshot(dir2);
hdfs.setPermission(root, FsPermission.valueOf("-rwxrwxrwx"));
// create two dirs and make them snapshottable under the name of user1
UserGroupInformation ugi1 = UserGroupInformation.createUserForTesting(
"user1", new String[] { "group1" });
DistributedFileSystem fs1 = (DistributedFileSystem) DFSTestUtil
.getFileSystemAs(ugi1, conf);
Path dir1_user1 = new Path("/dir1_user1");
Path dir2_user1 = new Path("/dir2_user1");
fs1.mkdirs(dir1_user1);
fs1.mkdirs(dir2_user1);
hdfs.allowSnapshot(dir1_user1);
hdfs.allowSnapshot(dir2_user1);
// user2
UserGroupInformation ugi2 = UserGroupInformation.createUserForTesting(
"user2", new String[] { "group2" });
DistributedFileSystem fs2 = (DistributedFileSystem) DFSTestUtil
.getFileSystemAs(ugi2, conf);
Path dir_user2 = new Path("/dir_user2");
Path subdir_user2 = new Path(dir_user2, "subdir");
fs2.mkdirs(dir_user2);
fs2.mkdirs(subdir_user2);
hdfs.allowSnapshot(dir_user2);
hdfs.allowSnapshot(subdir_user2);
// super user
String supergroup = conf.get(DFS_PERMISSIONS_SUPERUSERGROUP_KEY,
DFS_PERMISSIONS_SUPERUSERGROUP_DEFAULT);
UserGroupInformation superUgi = UserGroupInformation.createUserForTesting(
"superuser", new String[] { supergroup });
DistributedFileSystem fs3 = (DistributedFileSystem) DFSTestUtil
.getFileSystemAs(superUgi, conf);
// list the snapshottable dirs for superuser
SnapshottableDirectoryStatus[] dirs = fs3.getSnapshottableDirListing();
// 6 snapshottable dirs: dir1, dir2, dir1_user1, dir2_user1, dir_user2, and
// subdir_user2
assertEquals(6, dirs.length);
// list the snapshottable dirs for user1
dirs = fs1.getSnapshottableDirListing();
// 2 dirs owned by user1: dir1_user1 and dir2_user1
assertEquals(2, dirs.length);
assertEquals(dir1_user1, dirs[0].getFullPath());
assertEquals(dir2_user1, dirs[1].getFullPath());
// list the snapshottable dirs for user2
dirs = fs2.getSnapshottableDirListing();
// 2 dirs owned by user2: dir_user2 and subdir_user2
assertEquals(2, dirs.length);
assertEquals(dir_user2, dirs[0].getFullPath());
assertEquals(subdir_user2, dirs[1].getFullPath());
}