Examples of org.apache.hadoop.hbase.client.Admin.deleteTable()

Class org.apache.hadoop.hbase.client.Admin

Examples of org.apache.hadoop.hbase.client.Admin.deleteTable()

org.apache.hadoop.hbase.client.Admin.deleteTable()
Deletes a table. Synchronous operation. @param tableName name of table to delete @throws IOException if a remote or network exception occurs

    Admin admin = TEST_UTIL.getHBaseAdmin();
    if (admin.tableExists(tableName)) {
      if (admin.isTableEnabled(tableName)) {
        admin.disableTable(tableName);
      }
      admin.deleteTable(tableName);
    }
    admin.createTable(htd);
    waitForTable(htd.getTableName());


    // verify that the coprocessors were loaded

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    admin.truncateTable(TEST_TABLE, false);


    // delete table
    admin.disableTable(TEST_TABLE);
    assertTrue(admin.isTableDisabled(TEST_TABLE));
    admin.deleteTable(TEST_TABLE);
    assertFalse("Test table should have been deleted",
        admin.tableExists(TEST_TABLE));
    // preDeleteTable can't bypass default action.
    assertTrue("Coprocessor should have been called on table delete",
        cp.wasDeleteTableCalled());

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    // delete table
    assertFalse("No table deleted yet", cp.wasDeleteTableCalled());
    assertFalse("Delete table handler should not be called.",
        cp.wasDeleteTableHandlerCalled());
    admin.deleteTable(TEST_TABLE);
    assertFalse("Test table should have been deleted",
        admin.tableExists(TEST_TABLE));
    assertTrue("Coprocessor should have been called on table delete",
        cp.wasDeleteTableCalled());
    assertTrue("Delete table handler should be called.",

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        cp.wasCloneSnapshotCalled());
      assertFalse("Coprocessor restore should not have been called on snapshot clone",
        cp.wasRestoreSnapshotCalled());
      admin.disableTable(TEST_CLONE);
      assertTrue(admin.isTableDisabled(TEST_TABLE));
      admin.deleteTable(TEST_CLONE);


      // Test restore operation
      cp.resetStates();
      admin.restoreSnapshot(TEST_SNAPSHOT);
      assertTrue("Coprocessor should have been called on snapshot restore",

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      admin.deleteSnapshot(TEST_SNAPSHOT);
      assertTrue("Coprocessor should have been called on snapshot delete",
        cp.wasDeleteSnapshotCalled());
    } finally {
      admin.deleteTable(TEST_TABLE);
    }
  }


  @Test
  public void testNamespaceOperations() throws Exception {

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      modifiedHtd.addFamily(new HColumnDescriptor(FAMILY_0));
      modifiedHtd.addFamily(new HColumnDescriptor(FAMILY_1));
      admin.modifyTable(TABLE_NAME, modifiedHtd);
      verifyTableDescriptor(TABLE_NAME, FAMILY_0, FAMILY_1);
    } finally {
      admin.deleteTable(TABLE_NAME);
    }
  }


  @Test
  public void testAddColumn() throws IOException {

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      // Modify the table removing one family and verify the descriptor
      admin.addColumn(TABLE_NAME, new HColumnDescriptor(FAMILY_1));
      verifyTableDescriptor(TABLE_NAME, FAMILY_0, FAMILY_1);
    } finally {
      admin.deleteTable(TABLE_NAME);
    }
  }


  @Test
  public void testDeleteColumn() throws IOException {

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      // Modify the table removing one family and verify the descriptor
      admin.deleteColumn(TABLE_NAME, FAMILY_1);
      verifyTableDescriptor(TABLE_NAME, FAMILY_0);
    } finally {
      admin.deleteTable(TABLE_NAME);
    }
  }


  private void verifyTableDescriptor(final TableName tableName,
                                     final byte[]... families) throws IOException {

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      @Override
      public Object call() throws Exception {
        Admin admin = TEST_UTIL.getHBaseAdmin();
        admin.disableTable(TABLE_NAME);
        assertTrue(admin.isTableDisabled(TABLE_NAME));
        admin.deleteTable(TABLE_NAME);
        assertFalse(admin.tableExists(TABLE_NAME));
        return null;
      }
    });

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  public void testDelete() throws Exception {
    prepareMiniCluster();


    Admin admin = TEST_UTIL.getHBaseAdmin();
    admin.disableTable(TABLE_NAME);
    admin.deleteTable(TABLE_NAME);


    //ensure that znode for the table node has been deleted
    final ZooKeeperWatcher zkWatcher = TEST_UTIL.getZooKeeperWatcher();
    final String znode = ZKUtil.joinZNode(zkWatcher.tableLockZNode, TABLE_NAME.getNameAsString());

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