Package org.apache.hadoop.hdfs

Examples of org.apache.hadoop.hdfs.DistributedFileSystem.rename()

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    FSDataOutputStream s = dfs.create(pathFileCreate);
    // OP_CLOSE 9
    s.close();
    // OP_RENAME_OLD 1
    Path pathFileMoved = new Path("/file_moved");
    dfs.rename(pathFileCreate, pathFileMoved);
    // OP_DELETE 2
    dfs.delete(pathFileMoved, false);
    // OP_MKDIR 3
    Path pathDirectoryMkdir = new Path("/directory_mkdir");
    dfs.mkdirs(pathDirectoryMkdir);
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    DistributedFileSystem fs = (DistributedFileSystem) cluster.getFileSystem();
    OutputStream out = null;
    try {
      fs.mkdirs(new Path("/test-target"));
      out = fs.create(new Path("/test-source/foo")); // don't close
      fs.rename(new Path("/test-source/"), new Path("/test-target/"));

      fs.setSafeMode(SafeModeAction.SAFEMODE_ENTER);
      cluster.getNameNodeRpc().saveNamespace();
      fs.setSafeMode(SafeModeAction.SAFEMODE_LEAVE);
    } finally {
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      assertTrue(hasException);
      assertTrue(dfs.exists(tempPath));
      assertFalse(dfs.exists(new Path(quotaDir3, "nqdir32")));

      // 11: Move /nqdir0/qdir1/qdir20/nqdir30 to /nqdir0
      assertTrue(dfs.rename(tempPath, new Path("/nqdir0")));
      c = dfs.getContentSummary(quotaDir2);
      assertEquals(c.getDirectoryCount(), 2);
      assertEquals(c.getQuota(), 7);
      c = dfs.getContentSummary(quotaDir1);
      assertEquals(c.getDirectoryCount(), 4);
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      assertTrue(dfs.mkdirs(new Path("/nqdir0/nqdir30/nqdir33")));

      // 13: Move /nqdir0/nqdir30 /nqdir0/qdir1/qdir20/qdir30
      hasException = false;
      try {
        assertFalse(dfs.rename(new Path("/nqdir0/nqdir30"), tempPath));
      } catch (NSQuotaExceededException e) {
        hasException = true;
      }
      assertTrue(hasException);
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        hasException = true;
      }
      assertTrue(hasException);

      // 14: Move /nqdir0/qdir1/qdir21 /nqdir0/qdir1/qdir20
      assertTrue(dfs.rename(quotaDir3, quotaDir2));
      c = dfs.getContentSummary(quotaDir1);
      assertEquals(c.getDirectoryCount(), 4);
      assertEquals(c.getQuota(), 6);
      c = dfs.getContentSummary(quotaDir2);
      assertEquals(c.getDirectoryCount(), 3);
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      c = dfs.getContentSummary(quotaDir1);
      assertEquals(c.getDirectoryCount(), 3);
      assertEquals(c.getQuota(), 6);

      // 16: Move /nqdir0/qdir30 /nqdir0/qdir1/qdir20
      assertTrue(dfs.rename(new Path("/nqdir0/nqdir30"), quotaDir2));
      c = dfs.getContentSummary(quotaDir2);
      assertEquals(c.getDirectoryCount(), 5);
      assertEquals(c.getQuota(), 7);
      c = dfs.getContentSummary(quotaDir1);
      assertEquals(c.getDirectoryCount(), 6);
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      assertEquals(c.getSpaceConsumed(), 0);
     
      // Move /nqdir0/qdir1/qdir21/nqdir32 /nqdir0/qdir1/qdir20/nqdir30
      Path dstPath = new Path(quotaDir20, "nqdir30");
      Path srcPath = new Path(quotaDir21, "nqdir32");
      assertTrue(dfs.rename(srcPath, dstPath));
     
      // verify space after the move
      c = dfs.getContentSummary(quotaDir20);
      assertEquals(c.getSpaceConsumed(), fileSpace);
      // verify space for its parent
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      assertEquals(c.getSpaceConsumed(), 0);
     
      // Reverse: Move /nqdir0/qdir1/qdir20/nqdir30 to /nqdir0/qdir1/qdir21/
      hasException = false;
      try {
        assertFalse(dfs.rename(dstPath, srcPath));
      } catch (DSQuotaExceededException e) {
        hasException = true;
      }
      assertTrue(hasException);
     
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  private void oldRename(Path src, Path dst, boolean renameSucceeds,
      boolean exception) throws Exception {
    DistributedFileSystem fs = cluster.getFileSystem();
    try {
      Assert.assertEquals(renameSucceeds, fs.rename(src, dst));
    } catch (Exception ex) {
      Assert.assertTrue(exception);
    }
    Assert.assertEquals(renameSucceeds, !exists(fc, src));
    Assert.assertEquals(renameSucceeds, exists(fc, dst));
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    FSDataOutputStream s = dfs.create(pathFileCreate);
    // OP_CLOSE 9
    s.close();
    // OP_RENAME_OLD 1
    Path pathFileMoved = new Path("/file_moved");
    dfs.rename(pathFileCreate, pathFileMoved);
    // OP_DELETE 2
    dfs.delete(pathFileMoved, false);
    // OP_MKDIR 3
    Path pathDirectoryMkdir = new Path("/directory_mkdir");
    dfs.mkdirs(pathDirectoryMkdir);
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