Package org.apache.hadoop.hdfs.server.datanode

Examples of org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface$Factory

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    }
   
  }
 
  public void testInValidBlocks() throws IOException {
    FSDatasetInterface fsdataset = new SimulatedFSDataset(conf);
    Block b = new Block(1, 5, 0);
    checkInvalidBlock(b);
   
    // Now check invlaid after adding some blocks
    addSomeBlocks(fsdataset);
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    checkInvalidBlock(b);
   
  }

  public void testInvalidate() throws IOException {
    FSDatasetInterface fsdataset = new SimulatedFSDataset(conf);
    int bytesAdded = addSomeBlocks(fsdataset);
    Block[] deleteBlocks = new Block[2];
    deleteBlocks[0] = new Block(1, 0, 0);
    deleteBlocks[1] = new Block(2, 0, 0);
    fsdataset.invalidate(deleteBlocks);
    checkInvalidBlock(deleteBlocks[0]);
    checkInvalidBlock(deleteBlocks[1]);
    long sizeDeleted = blockIdToLen(1) + blockIdToLen(2);
    assertEquals(bytesAdded-sizeDeleted, fsdataset.getDfsUsed());
    assertEquals(fsdataset.getCapacity()-bytesAdded+sizeDeleted,  fsdataset.getRemaining());
   
   
   
    // Now make sure the rest of the blocks are valid
    for (int i=3; i <= NUMBLOCKS; ++i) {
      Block b = new Block(i, 0, 0);
      assertTrue(fsdataset.isValidBlock(b));
    }
  }
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  int addSomeBlocks(FSDatasetInterface fsdataset ) throws IOException {
    return addSomeBlocks(fsdataset, 1);
  }

  public void testGetMetaData() throws IOException {
    FSDatasetInterface fsdataset = new SimulatedFSDataset(conf);
    Block b = new Block(1, 5, 0);
    try {
      assertFalse(fsdataset.metaFileExists(b));
      assertTrue("Expected an IO exception", false);
    } catch (IOException e) {
      // ok - as expected
    }
    addSomeBlocks(fsdataset); // Only need to add one but ....
    b = new Block(1, 0, 0);
    InputStream metaInput = fsdataset.getMetaDataInputStream(b);
    DataInputStream metaDataInput = new DataInputStream(metaInput);
    short version = metaDataInput.readShort();
    assertEquals(FSDataset.METADATA_VERSION, version);
    DataChecksum checksum = DataChecksum.newDataChecksum(metaDataInput);
    assertEquals(DataChecksum.CHECKSUM_NULL, checksum.getChecksumType());
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    assertEquals(0, checksum.getChecksumSize()); 
  }


  public void testStorageUsage() throws IOException {
    FSDatasetInterface fsdataset = new SimulatedFSDataset(conf);
    assertEquals(fsdataset.getDfsUsed(), 0);
    assertEquals(fsdataset.getRemaining(), fsdataset.getCapacity());
    int bytesAdded = addSomeBlocks(fsdataset);
    assertEquals(bytesAdded, fsdataset.getDfsUsed());
    assertEquals(fsdataset.getCapacity()-bytesAdded,  fsdataset.getRemaining());
   
  }
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    }
    assertEquals(expectedLen, lengthRead);
  }
 
  public void testWriteRead() throws IOException {
    FSDatasetInterface fsdataset = new SimulatedFSDataset(conf);
    addSomeBlocks(fsdataset);
    for (int i=1; i <= NUMBLOCKS; ++i) {
      Block b = new Block(i, 0, 0);
      assertTrue(fsdataset.isValidBlock(b));
      assertEquals(blockIdToLen(i), fsdataset.getLength(b));
      checkBlockDataAndSize(fsdataset, b, blockIdToLen(i));
    }
  }
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   */
  public void injectBlocks(int dataNodeIndex, Block[] blocksToInject) throws IOException {
    if (dataNodeIndex < 0 || dataNodeIndex > dataNodes.size()) {
      throw new IndexOutOfBoundsException();
    }
    FSDatasetInterface dataSet = dataNodes.get(dataNodeIndex).datanode.getFSDataset();
    if (!(dataSet instanceof SimulatedFSDataset)) {
      throw new IOException("injectBlocks is valid only for SimilatedFSDataset");
    }
    SimulatedFSDataset sdataset = (SimulatedFSDataset) dataSet;
    sdataset.injectBlocks(blocksToInject);
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    assertEquals(SimulatedFSDataset.Factory.class, s.getClass());
    assertTrue(s.isSimulated());
  }

  public void testGetMetaData() throws IOException {
    FSDatasetInterface fsdataset = getSimulatedFSDataset();
    ExtendedBlock b = new ExtendedBlock(bpid, 1, 5, 0);
    try {
      assertFalse(fsdataset.metaFileExists(b));
      assertTrue("Expected an IO exception", false);
    } catch (IOException e) {
      // ok - as expected
    }
    addSomeBlocks(fsdataset); // Only need to add one but ....
    b = new ExtendedBlock(bpid, 1, 0, 0);
    InputStream metaInput = fsdataset.getMetaDataInputStream(b);
    DataInputStream metaDataInput = new DataInputStream(metaInput);
    short version = metaDataInput.readShort();
    assertEquals(BlockMetadataHeader.VERSION, version);
    DataChecksum checksum = DataChecksum.newDataChecksum(metaDataInput);
    assertEquals(DataChecksum.Type.NULL, checksum.getChecksumType());
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    assertEquals(0, checksum.getChecksumSize()); 
  }


  public void testStorageUsage() throws IOException {
    FSDatasetInterface fsdataset = getSimulatedFSDataset();
    assertEquals(fsdataset.getDfsUsed(), 0);
    assertEquals(fsdataset.getRemaining(), fsdataset.getCapacity());
    int bytesAdded = addSomeBlocks(fsdataset);
    assertEquals(bytesAdded, fsdataset.getDfsUsed());
    assertEquals(fsdataset.getCapacity()-bytesAdded,  fsdataset.getRemaining());
  }
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    }
    assertEquals(expectedLen, lengthRead);
  }
 
  public void testWriteRead() throws IOException {
    FSDatasetInterface fsdataset = getSimulatedFSDataset();
    addSomeBlocks(fsdataset);
    for (int i=1; i <= NUMBLOCKS; ++i) {
      ExtendedBlock b = new ExtendedBlock(bpid, i, 0, 0);
      assertTrue(fsdataset.isValidBlock(b));
      assertEquals(blockIdToLen(i), fsdataset.getLength(b));
      checkBlockDataAndSize(fsdataset, b, blockIdToLen(i));
    }
  }
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      // ok - as expected
    }
  }

  public void checkInvalidBlock(ExtendedBlock b) throws IOException {
    FSDatasetInterface fsdataset = getSimulatedFSDataset();
    assertFalse(fsdataset.isValidBlock(b));
    try {
      fsdataset.getLength(b);
      assertTrue("Expected an IO exception", false);
    } catch (IOException e) {
      // ok - as expected
    }
   
    try {
      fsdataset.getBlockInputStream(b);
      assertTrue("Expected an IO exception", false);
    } catch (IOException e) {
      // ok - as expected
    }
   
    try {
      fsdataset.finalizeBlock(b);
      assertTrue("Expected an IO exception", false);
    } catch (IOException e) {
      // ok - as expected
    }
  }
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