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.

  }


  @Test
  public void testCoprocessorCanCreateConnectionToRemoteTable() throws Throwable {
    HTableDescriptor primary = new HTableDescriptor(TableName.valueOf("primary"));
    primary.addFamily(new HColumnDescriptor(family));
    // add our coprocessor
    primary.addCoprocessor(SendToOtherTableCoprocessor.class.getName());


    HTableDescriptor other = new HTableDescriptor(otherTable);
    other.addFamily(new HColumnDescriptor(family));
    UTIL.startMiniCluster();


    HBaseAdmin admin = UTIL.getHBaseAdmin();
    admin.createTable(primary);
    admin.createTable(other);

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    HTable table = new HTable(TEST_UTIL.getConfiguration(), tableName);


    // Add one column family and put some data in it
    admin.disableTable(tableName);
    admin.addColumn(tableName, new HColumnDescriptor(TEST_FAMILY2));
    admin.enableTable(tableName);
    assertEquals(2, table.getTableDescriptor().getFamilies().size());
    HTableDescriptor htd = admin.getTableDescriptor(tableName);
    assertEquals(2, htd.getFamilies().size());
    SnapshotTestingUtils.loadData(TEST_UTIL, table, 500, TEST_FAMILY2);

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  @Before
  public void setUp() throws Exception {
    // Create the test table (owner added to the _acl_ table)
    HBaseAdmin admin = TEST_UTIL.getHBaseAdmin();
    HTableDescriptor htd = new HTableDescriptor(TEST_TABLE.getTableName());
    htd.addFamily(new HColumnDescriptor(TEST_FAMILY));
    htd.setOwner(USER_OWNER);
    admin.createTable(htd);
    TEST_UTIL.waitTableEnabled(TEST_TABLE.getTableName().getName());


    HRegion region = TEST_UTIL.getHBaseCluster().getRegions(TEST_TABLE.getTableName()).get(0);

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  @Test
  public void testTableCreate() throws Exception {
    PrivilegedExceptionAction createTable = new PrivilegedExceptionAction() {
      public Object run() throws Exception {
        HTableDescriptor htd = new HTableDescriptor(TableName.valueOf("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.getTableName());
        htd.addFamily(new HColumnDescriptor(TEST_FAMILY));
        htd.addFamily(new HColumnDescriptor("fam_" + User.getCurrent().getShortName()));
        ACCESS_CONTROLLER.preModifyTable(ObserverContext.createAndPrepare(CP_ENV, null),
          TEST_TABLE.getTableName(), 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.getTableName(),
          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.getTableName(), 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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    Configuration conf = TESTING_UTIL.getConfiguration();
    ZooKeeperWatcher zkw = HBaseTestingUtility.getZooKeeperWatcher(TESTING_UTIL);
    TableName userTableName =
        TableName.valueOf("testSplitShouldNotThrowNPEEvenARegionHasEmptySplitFiles");
    HTableDescriptor htd = new HTableDescriptor(userTableName);
    HColumnDescriptor hcd = new HColumnDescriptor("col");
    htd.addFamily(hcd);
    admin.createTable(htd);
    ZKAssign.blockUntilNoRIT(zkw);
    HTable table = new HTable(conf, userTableName);
    try {

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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 user = User.createUserForTesting(TEST_UTIL.getConfiguration(), "user", new String[0]);

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