Examples of org.apache.hadoop.hbase.HColumnDescriptor

org.apache.hadoop.hbase.HColumnDescriptor
An HColumnDescriptor contains information about a column family such as the number of versions, compression settings, etc. It is used as input when creating a table or adding a column. Once set, the parameters that specify a column cannot be changed without deleting the column and recreating it. If there is data stored in the column, it will be deleted when the column is deleted.

        if (admin.tableExists(tableName)) {
          throw new AlreadyExists("table name already in use");
        }
        HTableDescriptor desc = new HTableDescriptor(tableName);
        for (ColumnDescriptor col : columnFamilies) {
          HColumnDescriptor colDesc = ThriftUtilities.colDescFromThrift(col);
          desc.addFamily(colDesc);
        }
        admin.createTable(desc);
      } catch (IOException e) {
        LOG.warn(e.getMessage(), e);

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   */
  private boolean fabricateTableInfo(String tableName, Set<String> columns) throws IOException {
    if (columns ==null || columns.isEmpty()) return false;
    HTableDescriptor htd = new HTableDescriptor(tableName);
    for (String columnfamimly : columns) {
      htd.addFamily(new HColumnDescriptor(columnfamimly));
    }
    FSTableDescriptors.createTableDescriptor(htd, getConf(), true);
    return true;
  }

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  @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";

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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";

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    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();

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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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    verifyDenied(deleteTable, USER_RW, USER_RO, USER_NONE);
  }


  @Test
  public void testAddColumn() throws Exception {
    final HColumnDescriptor hcd = new HColumnDescriptor("fam_new");
    PrivilegedExceptionAction action = new PrivilegedExceptionAction() {
      public Object run() throws Exception {
        ACCESS_CONTROLLER.preAddColumn(ObserverContext.createAndPrepare(CP_ENV, null), TEST_TABLE,
          hcd);
        return null;

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    verifyDenied(action, USER_RW, USER_RO, USER_NONE);
  }


  @Test
  public void testModifyColumn() throws Exception {
    final HColumnDescriptor hcd = new HColumnDescriptor(TEST_FAMILY);
    hcd.setMaxVersions(10);
    PrivilegedExceptionAction action = new PrivilegedExceptionAction() {
      public Object run() throws Exception {
        ACCESS_CONTROLLER.preModifyColumn(ObserverContext.createAndPrepare(CP_ENV, null),
          TEST_TABLE, hcd);
        return null;

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    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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