Examples of org.apache.hadoop.hbase.HTableDescriptor

org.apache.hadoop.hbase.HTableDescriptor
HTableDescriptor contains the details about an HBase table such as the descriptors of all the column families, is the table a catalog table, -ROOT- or .META. , is the table is read only, the maximum size of the memstore, when the region split should occur, coprocessors associated with it etc...

    }


    LOG.debug("No existing snapshot, attempting snapshot...");


    // check to see if the table exists
    HTableDescriptor desc = null;
    try {
      desc = master.getTableDescriptors().get(snapshot.getTable());
    } catch (FileNotFoundException e) {
      String msg = "Table:" + snapshot.getTable() + " info doesn't exist!";
      LOG.error(msg);

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      throw new SnapshotDoesNotExistException(reqSnapshot);
    }


    // read snapshot information
    SnapshotDescription fsSnapshot = SnapshotDescriptionUtils.readSnapshotInfo(fs, snapshotDir);
    HTableDescriptor snapshotTableDesc = FSTableDescriptors.getTableDescriptor(fs, snapshotDir);
    String tableName = reqSnapshot.getTable();


    // stop tracking completed restores
    cleanupRestoreSentinels();


    // Execute the restore/clone operation
    if (MetaReader.tableExists(master.getCatalogTracker(), tableName)) {
      if (master.getAssignmentManager().getZKTable().isEnabledTable(fsSnapshot.getTable())) {
        throw new UnsupportedOperationException("Table '" +
          fsSnapshot.getTable() + "' must be disabled in order to perform a restore operation.");
      }


      // call coproc pre hook
      if (cpHost != null) {
        cpHost.preRestoreSnapshot(reqSnapshot, snapshotTableDesc);
      }
      restoreSnapshot(fsSnapshot, snapshotTableDesc);
      LOG.info("Restore snapshot=" + fsSnapshot.getName() + " as table=" + tableName);


      if (cpHost != null) {
        cpHost.postRestoreSnapshot(reqSnapshot, snapshotTableDesc);
      }
    } else {
      HTableDescriptor htd = RestoreSnapshotHelper.cloneTableSchema(snapshotTableDesc,
                                                         Bytes.toBytes(tableName));
      if (cpHost != null) {
        cpHost.preCloneSnapshot(reqSnapshot, htd);
      }
      cloneSnapshot(fsSnapshot, htd);

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      HBaseTestingUtility();


  @Test
  public void testColumnCountGetFilter() throws IOException {
    String family = "Family";
    HTableDescriptor htd = new HTableDescriptor("testColumnCountGetFilter");
    htd.addFamily(new HColumnDescriptor(family));
    HRegionInfo info = new HRegionInfo(htd.getName(), null, null, false);
    HRegion region = HRegion.createHRegion(info, TEST_UTIL.
      getDataTestDir(), TEST_UTIL.getConfiguration(), htd);
    try {
      String valueString = "ValueString";
      String row = "row-1";

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  }


  @Test
  public void testColumnCountGetFilterWithFilterList() throws IOException {
    String family = "Family";
    HTableDescriptor htd = new HTableDescriptor("testColumnCountGetFilter");
    htd.addFamily(new HColumnDescriptor(family));
    HRegionInfo info = new HRegionInfo(htd.getName(), null, null, false);
    HRegion region = HRegion.createHRegion(info, TEST_UTIL.
      getDataTestDir(), TEST_UTIL.getConfiguration(), htd);
    try {
      String valueString = "ValueString";
      String row = "row-1";

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   * @throws IOException
   */
  public HTableDescriptor getTableDescriptor()
  throws FileNotFoundException, IOException {
    final String name = Bytes.toString(tableName);
    HTableDescriptor htd =
      this.masterServices.getTableDescriptors().get(name);
    if (htd == null) {
      throw new IOException("HTableDescriptor missing for " + name);
    }
    return htd;

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      LOG.debug("Files for region: " + b);
      listPaths(fs, b.getRegionDir());
    }


    Configuration conf = a.getConf();
    HTableDescriptor tabledesc = a.getTableDesc();
    HLog log = a.getLog();
    Path tableDir = a.getTableDir();
    // Presume both are of same region type -- i.e. both user or catalog
    // table regions.  This way can use comparator.
    final byte[] startKey =
      (a.comparator.matchingRows(a.getStartKey(), 0, a.getStartKey().length,
           HConstants.EMPTY_BYTE_ARRAY, 0, HConstants.EMPTY_BYTE_ARRAY.length)
       || b.comparator.matchingRows(b.getStartKey(), 0,
              b.getStartKey().length, HConstants.EMPTY_BYTE_ARRAY, 0,
              HConstants.EMPTY_BYTE_ARRAY.length))
      ? HConstants.EMPTY_BYTE_ARRAY
      : (a.comparator.compareRows(a.getStartKey(), 0, a.getStartKey().length,
             b.getStartKey(), 0, b.getStartKey().length) <= 0
         ? a.getStartKey()
         : b.getStartKey());
    final byte[] endKey =
      (a.comparator.matchingRows(a.getEndKey(), 0, a.getEndKey().length,
           HConstants.EMPTY_BYTE_ARRAY, 0, HConstants.EMPTY_BYTE_ARRAY.length)
       || a.comparator.matchingRows(b.getEndKey(), 0, b.getEndKey().length,
              HConstants.EMPTY_BYTE_ARRAY, 0,
              HConstants.EMPTY_BYTE_ARRAY.length))
      ? HConstants.EMPTY_BYTE_ARRAY
      : (a.comparator.compareRows(a.getEndKey(), 0, a.getEndKey().length,
             b.getEndKey(), 0, b.getEndKey().length) <= 0
         ? b.getEndKey()
         : a.getEndKey());


    HRegionInfo newRegionInfo =
        new HRegionInfo(tabledesc.getName(), startKey, endKey);
    LOG.info("Creating new region " + newRegionInfo.toString());
    String encodedName = newRegionInfo.getEncodedName();
    Path newRegionDir = HRegion.getRegionDir(a.getTableDir(), encodedName);
    if(fs.exists(newRegionDir)) {
      throw new IOException("Cannot merge; target file collision at " +

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    USER_OWNER = User.createUserForTesting(conf, "owner", new String[0]);
    USER_CREATE = User.createUserForTesting(conf, "tbl_create", new String[0]);
    USER_NONE = User.createUserForTesting(conf, "nouser", new String[0]);


    HBaseAdmin admin = TEST_UTIL.getHBaseAdmin();
    HTableDescriptor htd = new HTableDescriptor(TEST_TABLE);
    htd.addFamily(new HColumnDescriptor(TEST_FAMILY));
    htd.setOwner(USER_OWNER);
    admin.createTable(htd);


    HRegion region = TEST_UTIL.getHBaseCluster().getRegions(TEST_TABLE).get(0);
    RegionCoprocessorHost rcpHost = region.getCoprocessorHost();
    RCP_ENV = rcpHost.createEnvironment(AccessController.class, ACCESS_CONTROLLER,

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  @Test
  public void testTableCreate() throws Exception {
    PrivilegedExceptionAction createTable = new PrivilegedExceptionAction() {
      public Object run() throws Exception {
        HTableDescriptor htd = new HTableDescriptor("testnewtable");
        htd.addFamily(new HColumnDescriptor(TEST_FAMILY));
        ACCESS_CONTROLLER.preCreateTable(ObserverContext.createAndPrepare(CP_ENV, null), htd, null);
        return null;
      }
    };

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  @Test
  public void testTableModify() throws Exception {
    PrivilegedExceptionAction modifyTable = new PrivilegedExceptionAction() {
      public Object run() throws Exception {
        HTableDescriptor htd = new HTableDescriptor(TEST_TABLE);
        htd.addFamily(new HColumnDescriptor(TEST_FAMILY));
        htd.addFamily(new HColumnDescriptor("fam_" + User.getCurrent().getShortName()));
        ACCESS_CONTROLLER.preModifyTable(ObserverContext.createAndPrepare(CP_ENV, null),
          TEST_TABLE, htd);
        return null;
      }
    };

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    HBaseAdmin admin = TEST_UTIL.getHBaseAdmin();
    if (admin.tableExists(tableName)) {
      admin.disableTable(tableName);
      admin.deleteTable(tableName);
    }
    HTableDescriptor htd = new HTableDescriptor(tableName);
    htd.addFamily(new HColumnDescriptor(family1));
    htd.addFamily(new HColumnDescriptor(family2));
    admin.createTable(htd);


    // create temp users
    User tblUser = User
        .createUserForTesting(TEST_UTIL.getConfiguration(), "tbluser", new String[0]);

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