Examples of org.kiji.schema.layout.impl.HTableSchemaTranslator

org.kiji.schema.layout.impl.HTableSchemaTranslator
Translates between KijiTableLayouts and HTableDescriptors.
A Kiji table has a layout with locality groups, families, and columns. An HTable only has HColumns. This classes maps between the Kiji layout components and the HTable schema components, which ultimately determines how we map Kiji data onto an HTable.

import org.kiji.schema.layout.impl.HTableSchemaTranslator;


public class TestHTableSchemaTranslator {
  @Test
  public void testTranslate() throws Exception {
    final HTableSchemaTranslator translator = new HTableSchemaTranslator();


    final KijiTableLayout tableLayout =
        KijiTableLayout.newLayout(KijiTableLayouts.getLayout(KijiTableLayouts.FULL_FEATURED));


    final KijiURI tableURI =
        KijiURI
            .newBuilder()
            .withInstanceName("myinstance")
            .withTableName(tableLayout.getName()).build();
    final HTableDescriptor tableDescriptor =
        translator.toHTableDescriptor(tableURI.getInstance(), tableLayout);


    assertEquals("kiji.myinstance.table.user", tableDescriptor.getNameAsString());
    assertEquals(2, tableDescriptor.getColumnFamilies().length);


    assertFalse(tableDescriptor.getFamily(Bytes.toBytes("B")).isInMemory());

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    if (dryRun) {
      printStream.println("This table layout is valid.");
    }


    LOG.debug("Computing new HBase schema");
    final HTableSchemaTranslator translator = new HTableSchemaTranslator();
    final HTableDescriptor newTableDescriptor =
        translator.toHTableDescriptor(tableURI.getInstance(), newLayout);


    LOG.debug("Reading existing HBase schema");
    final KijiManagedHBaseTableName hbaseTableName =
        KijiManagedHBaseTableName.getKijiTableName(mURI.getInstance(), tableName);
    HTableDescriptor currentTableDescriptor = null;

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        ZooKeeperUtils.wrapAndRethrow(e);
      }
    }


    try {
      final HTableSchemaTranslator translator = new HTableSchemaTranslator();
      final HTableDescriptor desc =
          translator.toHTableDescriptor(tableURI.getInstance(), kijiTableLayout);
      LOG.debug("Creating HBase table '{}'.", desc.getNameAsString());
      if (null != splitKeys) {
        getHBaseAdmin().createTable(desc, splitKeys);
      } else {
        getHBaseAdmin().createTable(desc);

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Related Classes of org.kiji.schema.layout.impl.HTableSchemaTranslator

org.apache.hadoop.hbase.HColumnDescriptor

org.apache.hadoop.hbase.HTableDescriptor

org.kiji.schema.avro.LocalityGroupDesc

org.kiji.schema.avro.TableLayoutDesc

org.kiji.schema.hbase.KijiManagedHBaseTableName

org.kiji.schema.impl.hbase.HBaseKiji

org.kiji.schema.layout.HBaseColumnNameTranslator

org.kiji.schema.layout.TestHTableSchemaTranslator

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