Examples of SnapshotDiffReport

org.apache.hadoop.hdfs.protocol.SnapshotDiffReport
This class represents to end users the difference between two snapshots of the same directory, or the difference between a snapshot of the directory and its current state. Instead of capturing all the details of the diff, this class only lists where the changes happened and their types.

Examples of org.apache.hadoop.hdfs.protocol.SnapshotDiffReport

  }
  
  /** check the correctness of the diff reports */
  private void verifyDiffReport(Path dir, String from, String to,
      DiffReportEntry... entries) throws IOException {
    SnapshotDiffReport report = hdfs.getSnapshotDiffReport(dir, from, to);
    // reverse the order of from and to
    SnapshotDiffReport inverseReport = hdfs
        .getSnapshotDiffReport(dir, to, from);
    System.out.println(report.toString());
    System.out.println(inverseReport.toString() + "\n");
    
    assertEquals(entries.length, report.getDiffList().size());
    assertEquals(entries.length, inverseReport.getDiffList().size());
    
    for (DiffReportEntry entry : entries) {
      if (entry.getType() == DiffType.MODIFY) {
        assertTrue(report.getDiffList().contains(entry));
        assertTrue(inverseReport.getDiffList().contains(entry));
      } else if (entry.getType() == DiffType.DELETE) {
        assertTrue(report.getDiffList().contains(entry));
        assertTrue(inverseReport.getDiffList().contains(
            new DiffReportEntry(DiffType.CREATE, entry.getRelativePath())));
      } else if (entry.getType() == DiffType.CREATE) {
        assertTrue(report.getDiffList().contains(entry));
        assertTrue(inverseReport.getDiffList().contains(
            new DiffReportEntry(DiffType.DELETE, entry.getRelativePath())));
      }
    }
  }

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Examples of org.apache.hadoop.hdfs.protocol.SnapshotDiffReport

          "Cannot find the snapshot of directory " + sub1 + " with name "
              + invalidName, e);
    }
    
    // diff between the same snapshot
    SnapshotDiffReport report = hdfs.getSnapshotDiffReport(sub1, "s0", "s0");
    System.out.println(report);
    assertEquals(0, report.getDiffList().size());
    
    report = hdfs.getSnapshotDiffReport(sub1, "", "");
    System.out.println(report);
    assertEquals(0, report.getDiffList().size());
    
    report = hdfs.getSnapshotDiffReport(subsubsub1, "s0", "s2");
    System.out.println(report);
    assertEquals(0, report.getDiffList().size());


    // test path with scheme also works
    report = hdfs.getSnapshotDiffReport(hdfs.makeQualified(subsubsub1), "s0", "s2");
    System.out.println(report);
    assertEquals(0, report.getDiffList().size());


    verifyDiffReport(sub1, "s0", "s2", 
        new DiffReportEntry(DiffType.MODIFY, DFSUtil.string2Bytes("")),
        new DiffReportEntry(DiffType.CREATE, DFSUtil.string2Bytes("file15")),
        new DiffReportEntry(DiffType.DELETE, DFSUtil.string2Bytes("file12")),

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Examples of org.apache.hadoop.hdfs.protocol.SnapshotDiffReport

    }
    
    if (auditLog.isInfoEnabled() && isExternalInvocation()) {
      logAuditEvent(true, "computeSnapshotDiff", null, null, null);
    }
    return diffs != null ? diffs.generateReport() : new SnapshotDiffReport(
        path, fromSnapshot, toSnapshot,
        Collections.<DiffReportEntry> emptyList());
  }

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Examples of org.apache.hadoop.hdfs.protocol.SnapshotDiffReport

  }


  @Override
  public SnapshotDiffReport getSnapshotDiffReport(String snapshotRoot,
      String earlierSnapshotName, String laterSnapshotName) throws IOException {
    SnapshotDiffReport report = namesystem.getSnapshotDiffReport(snapshotRoot,
        earlierSnapshotName, laterSnapshotName);
    metrics.incrSnapshotDiffReportOps();
    return report;
  }

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Examples of org.apache.hadoop.hdfs.protocol.SnapshotDiffReport

              diffMap.get(node), (INodeDirectoryWithSnapshot) node,
              isFromEarlier());
          diffReportList.addAll(subList);
        }
      }
      return new SnapshotDiffReport(snapshotRoot.getFullPathName(),
          Snapshot.getSnapshotName(from), Snapshot.getSnapshotName(to),
          diffReportList);
    }

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Examples of org.apache.hadoop.hdfs.protocol.SnapshotDiffReport

  }
  
  /** check the correctness of the diff reports */
  private void verifyDiffReport(Path dir, String from, String to,
      DiffReportEntry... entries) throws IOException {
    SnapshotDiffReport report = hdfs.getSnapshotDiffReport(dir, from, to);
    // reverse the order of from and to
    SnapshotDiffReport inverseReport = hdfs
        .getSnapshotDiffReport(dir, to, from);
    System.out.println(report.toString());
    System.out.println(inverseReport.toString() + "\n");
    
    assertEquals(entries.length, report.getDiffList().size());
    assertEquals(entries.length, inverseReport.getDiffList().size());
    
    for (DiffReportEntry entry : entries) {
      if (entry.getType() == DiffType.MODIFY) {
        assertTrue(report.getDiffList().contains(entry));
        assertTrue(inverseReport.getDiffList().contains(entry));
      } else if (entry.getType() == DiffType.DELETE) {
        assertTrue(report.getDiffList().contains(entry));
        assertTrue(inverseReport.getDiffList().contains(
            new DiffReportEntry(DiffType.CREATE, entry.getRelativePath())));
      } else if (entry.getType() == DiffType.CREATE) {
        assertTrue(report.getDiffList().contains(entry));
        assertTrue(inverseReport.getDiffList().contains(
            new DiffReportEntry(DiffType.DELETE, entry.getRelativePath())));
      }
    }
  }

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Examples of org.apache.hadoop.hdfs.protocol.SnapshotDiffReport

          "Cannot find the snapshot of directory " + sub1 + " with name "
              + invalidName, e);
    }
    
    // diff between the same snapshot
    SnapshotDiffReport report = hdfs.getSnapshotDiffReport(sub1, "s0", "s0");
    System.out.println(report);
    assertEquals(0, report.getDiffList().size());
    
    report = hdfs.getSnapshotDiffReport(sub1, "", "");
    System.out.println(report);
    assertEquals(0, report.getDiffList().size());
    
    report = hdfs.getSnapshotDiffReport(subsubsub1, "s0", "s2");
    System.out.println(report);
    assertEquals(0, report.getDiffList().size());


    // test path with scheme also works
    report = hdfs.getSnapshotDiffReport(hdfs.makeQualified(subsubsub1), "s0", "s2");
    System.out.println(report);
    assertEquals(0, report.getDiffList().size());


    verifyDiffReport(sub1, "s0", "s2", 
        new DiffReportEntry(DiffType.MODIFY, DFSUtil.string2Bytes("")),
        new DiffReportEntry(DiffType.CREATE, DFSUtil.string2Bytes("file15")),
        new DiffReportEntry(DiffType.DELETE, DFSUtil.string2Bytes("file12")),

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Examples of org.apache.hadoop.hdfs.protocol.SnapshotDiffReport

    hdfs.createSnapshot(sub1, snap1);
    DFSTestUtil.createFile(hdfs, file1, BLOCKSIZE, REPL, SEED);
    hdfs.rename(file1, file2);


    // Query the diff report and make sure it looks as expected.
    SnapshotDiffReport diffReport = hdfs.getSnapshotDiffReport(sub1, snap1, "");
    List<DiffReportEntry> entries = diffReport.getDiffList();
    assertTrue(entries.size() == 2);
    assertTrue(existsInDiffReport(entries, DiffType.MODIFY, ""));
    assertTrue(existsInDiffReport(entries, DiffType.CREATE, file2.getName()));
  }

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Examples of org.apache.hadoop.hdfs.protocol.SnapshotDiffReport

    DFSTestUtil.createFile(hdfs, file1, BLOCKSIZE, REPL, SEED);
    hdfs.createSnapshot(sub1, snap1);
    hdfs.rename(file1, file2);


    // Query the diff report and make sure it looks as expected.
    SnapshotDiffReport diffReport = hdfs.getSnapshotDiffReport(sub1, snap1, "");
    System.out.println("DiffList is " + diffReport.toString());
    List<DiffReportEntry> entries = diffReport.getDiffList();
    assertTrue(entries.size() == 3);
    assertTrue(existsInDiffReport(entries, DiffType.MODIFY, ""));
    assertTrue(existsInDiffReport(entries, DiffType.CREATE, file2.getName()));
    assertTrue(existsInDiffReport(entries, DiffType.DELETE, file1.getName()));
  }

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Examples of org.apache.hadoop.hdfs.protocol.SnapshotDiffReport

    hdfs.rename(file1, file2);
    
    hdfs.createSnapshot(sub1, snap2);
    hdfs.rename(file2, file3);


    SnapshotDiffReport diffReport;
    
    // Query the diff report and make sure it looks as expected.
    diffReport = hdfs.getSnapshotDiffReport(sub1, snap1, snap2);
    LOG.info("DiffList is " + diffReport.toString());
    List<DiffReportEntry> entries = diffReport.getDiffList();
    assertTrue(entries.size() == 3);
    assertTrue(existsInDiffReport(entries, DiffType.MODIFY, ""));
    assertTrue(existsInDiffReport(entries, DiffType.CREATE, file2.getName()));
    assertTrue(existsInDiffReport(entries, DiffType.DELETE, file1.getName()));
    
    diffReport = hdfs.getSnapshotDiffReport(sub1, snap2, "");
    LOG.info("DiffList is " + diffReport.toString());
    entries = diffReport.getDiffList();
    assertTrue(entries.size() == 3);
    assertTrue(existsInDiffReport(entries, DiffType.MODIFY, ""));
    assertTrue(existsInDiffReport(entries, DiffType.CREATE, file3.getName()));
    assertTrue(existsInDiffReport(entries, DiffType.DELETE, file2.getName()));
    
    diffReport = hdfs.getSnapshotDiffReport(sub1, snap1, "");
    LOG.info("DiffList is " + diffReport.toString());
    entries = diffReport.getDiffList();
    assertTrue(entries.size() == 3);
    assertTrue(existsInDiffReport(entries, DiffType.MODIFY, ""));
    assertTrue(existsInDiffReport(entries, DiffType.CREATE, file3.getName()));
    assertTrue(existsInDiffReport(entries, DiffType.DELETE, file1.getName()));
  }

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