Examples with Table org.apache.hadoop.hbase.client.Table used on opensource projects

Example 6 with Table

use of org.apache.hadoop.hbase.client.Table in project hbase by apache.

the class MetaTableAccessor method getAllBarriers.

/**
   * Get all barriers in all regions.
   * @return a map of barrier lists in all regions
   * @throws IOException
   */
public static Map<String, List<Long>> getAllBarriers(Connection connection) throws IOException {
    Map<String, List<Long>> map = new HashMap<>();
    Scan scan = new Scan();
    scan.addFamily(HConstants.REPLICATION_BARRIER_FAMILY);
    try (Table t = getMetaHTable(connection);
        ResultScanner scanner = t.getScanner(scan)) {
        Result result;
        while ((result = scanner.next()) != null) {
            String key = Bytes.toString(result.getRow());
            List<Long> list = new ArrayList<>(result.rawCells().length);
            for (Cell cell : result.rawCells()) {
                list.add(Bytes.toLong(cell.getQualifierArray(), cell.getQualifierOffset(), cell.getQualifierLength()));
            }
            map.put(key, list);
        }
    }
    return map;
}

Example 7 with Table

use of org.apache.hadoop.hbase.client.Table in project hbase by apache.

the class HelloHBase method main.

public static void main(final String[] args) throws IOException {
    final boolean deleteAllAtEOJ = true;
    /**
     * ConnectionFactory#createConnection() automatically looks for
     * hbase-site.xml (HBase configuration parameters) on the system's
     * CLASSPATH, to enable creation of Connection to HBase via ZooKeeper.
     */
    try (Connection connection = ConnectionFactory.createConnection();
        Admin admin = connection.getAdmin()) {
        // assure connection successfully established
        admin.getClusterStatus();
        System.out.println("\n*** Hello HBase! -- Connection has been " + "established via ZooKeeper!!\n");
        createNamespaceAndTable(admin);
        System.out.println("Getting a Table object for [" + MY_TABLE_NAME + "] with which to perform CRUD operations in HBase.");
        try (Table table = connection.getTable(MY_TABLE_NAME)) {
            putRowToTable(table);
            getAndPrintRowContents(table);
            if (deleteAllAtEOJ) {
                deleteRow(table);
            }
        }
        if (deleteAllAtEOJ) {
            deleteNamespaceAndTable(admin);
        }
    }
}

Example 8 with Table

use of org.apache.hadoop.hbase.client.Table in project hbase by apache.

the class TestHelloHBase method testDeleteRow.

@Test
public void testDeleteRow() throws IOException {
    Admin admin = TEST_UTIL.getAdmin();
    admin.createNamespace(NamespaceDescriptor.create(HelloHBase.MY_NAMESPACE_NAME).build());
    Table table = TEST_UTIL.createTable(HelloHBase.MY_TABLE_NAME, HelloHBase.MY_COLUMN_FAMILY_NAME);
    table.put(new Put(HelloHBase.MY_ROW_ID).addColumn(HelloHBase.MY_COLUMN_FAMILY_NAME, HelloHBase.MY_FIRST_COLUMN_QUALIFIER, Bytes.toBytes("xyz")));
    HelloHBase.deleteRow(table);
    Result row = table.get(new Get(HelloHBase.MY_ROW_ID));
    assertEquals("#deleteRow failed to delete row.", true, row.isEmpty());
    TEST_UTIL.deleteTable(HelloHBase.MY_TABLE_NAME);
    admin.deleteNamespace(HelloHBase.MY_NAMESPACE_NAME);
}

Example 9 with Table

use of org.apache.hadoop.hbase.client.Table in project hbase by apache.

the class TestHelloHBase method testDeleteRow.

@Test
public void testDeleteRow() throws IOException {
    Admin admin = TEST_UTIL.getAdmin();
    admin.createNamespace(NamespaceDescriptor.create(HelloHBase.MY_NAMESPACE_NAME).build());
    Table table = TEST_UTIL.createTable(HelloHBase.MY_TABLE_NAME, HelloHBase.MY_COLUMN_FAMILY_NAME);
    table.put(new Put(HelloHBase.MY_ROW_ID).addColumn(HelloHBase.MY_COLUMN_FAMILY_NAME, HelloHBase.MY_FIRST_COLUMN_QUALIFIER, Bytes.toBytes("xyz")));
    HelloHBase.deleteRow(table);
    Result row = table.get(new Get(HelloHBase.MY_ROW_ID));
    assertEquals("#deleteRow failed to delete row.", true, row.isEmpty());
    TEST_UTIL.deleteTable(HelloHBase.MY_TABLE_NAME);
    admin.deleteNamespace(HelloHBase.MY_NAMESPACE_NAME);
}

Example 10 with Table

use of org.apache.hadoop.hbase.client.Table in project hbase by apache.

the class TestHelloHBase method testPutRowToTable.

@Test
public void testPutRowToTable() throws IOException {
    Admin admin = TEST_UTIL.getAdmin();
    admin.createNamespace(NamespaceDescriptor.create(HelloHBase.MY_NAMESPACE_NAME).build());
    Table table = TEST_UTIL.createTable(HelloHBase.MY_TABLE_NAME, HelloHBase.MY_COLUMN_FAMILY_NAME);
    HelloHBase.putRowToTable(table);
    Result row = table.get(new Get(HelloHBase.MY_ROW_ID));
    assertEquals("#putRowToTable failed to store row.", false, row.isEmpty());
    TEST_UTIL.deleteTable(HelloHBase.MY_TABLE_NAME);
    admin.deleteNamespace(HelloHBase.MY_NAMESPACE_NAME);
}