Examples of org.kiji.schema.cassandra.CassandraTableName

org.kiji.schema.cassandra.CassandraTableName
The name of a Kiji-controlled Cassandra table name.
Multiple instances of Kiji can be installed on a single Cassandra cluster. Within a Kiji instance, several Cassandra tables are created to manage system, metadata, schemas, and user-space tables. This class represents the name of one of those Cassandra tables that are created and managed by Kiji. This class should only be used internally in Kiji modules, or by framework application developers who need direct access to Cassandra tables managed by Kiji.

The names of tables in Cassandra created and managed by Kiji are made of a list of delimited components. There are at least 3 components of a name:
1. Prefix: a literal string "kiji" used to mark that this table is managed by Kiji.
2. KijiInstance: the name of kiji instance managing this table.
3. Type: the type of table (system, schema, meta, user).
4. Name: if the table is a user table ("lg"), then the Kiji table's name is the fourth component.
5. Name: if the table is a user table ("lg"), then the locality group ID is the fifth component.
For example, a Cassandra cluster might have the following tables:
```
 devices kiji_default.meta kiji_default.schema kiji_default.schema_hash kiji_default.schema_id kiji_default.system kiji_default.lg_foo_BB kiji_default.lg_foo_BC kiji_default.lg_bar_BB kiji_experimental.meta kiji_experimental.schema kiji_experimental.schema_hash kiji_experimental.schema_id kiji_experimental.system kiji_experimental.lg_baz_BB 
```
In this example, there is a Cassandra keyspace completely unrelated to Kiji called "devices." There are two Kiji installations, one called "default" and another called "experimental." Within the "default" installation, there are two Kiji tables, "foo" and "bar." Within the "experimental" installation, there is a single Kiji table "baz."

Note that Cassandra does not allow the "." character in keyspace or table names, so the '_' character is used as a delimiter.

          String.format("No such column '%s' in table %s.", column, tableURI));
    }


    final ColumnId localityGroupId =
        layout.getFamilyMap().get(column.getFamily()).getLocalityGroup().getId();
    final CassandraTableName table =
        CassandraTableName.getLocalityGroupTableName(tableURI, localityGroupId);


    if (column.isFullyQualified()) {


      final Statement statement =

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  /**
   * Increment the schema ID counter.
   * @param incrementAmount Amount by which to increment the counter (can be negative).
   */
  private void incrementSchemaIdCounter(long incrementAmount) {
    CassandraTableName tableName = mCounterTable;
    String incrementSign = incrementAmount >= 0 ? "+" : "-";
    String queryText = String.format("UPDATE %s SET %s = %s %s %d WHERE %s='%s';",
        tableName,
        SCHEMA_COUNTER_COLUMN_VALUE,
        SCHEMA_COUNTER_COLUMN_VALUE,

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   * @param schemaId schema ID
   * @return Avro schema entry, or null if the schema ID does not exist in the table
   * @throws java.io.IOException on I/O error.
   */
  private SchemaTableEntry loadFromIdTable(long schemaId) throws IOException {
    CassandraTableName tableName = mSchemaIdTable;


    // TODO: Prepare this statement once in constructor, not every load.
    final String queryText = String.format(
        "SELECT %s FROM %s WHERE %s=%d ORDER BY %s DESC LIMIT 1",
        SCHEMA_COLUMN_VALUE,

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   * @param kijiURI The KijiURI for the instance to remove.
   * @throws java.io.IOException If there is an error.
   */
  public static void uninstall(CassandraAdmin admin, KijiURI kijiURI)
      throws IOException {
    final CassandraTableName hashTableName = CassandraTableName.getSchemaHashTableName(kijiURI);
    deleteTable(admin, hashTableName);


    final CassandraTableName idTableName = CassandraTableName.getSchemaIdTableName(kijiURI);
    deleteTable(admin, idTableName);


    final CassandraTableName counterTableName =
        CassandraTableName.getSchemaCounterTableName(kijiURI);
    deleteTable(admin, counterTableName);
  }

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   * Install a table for storing table layout information.
   * @param admin A wrapper around an open C* session.
   * @param uri The KijiURI of the instance for this table.
   */
  public static void install(CassandraAdmin admin, KijiURI uri) {
    CassandraTableName tableName = CassandraTableName.getMetaLayoutTableName(uri);


    // Standard C* table layout.  Use text key + timestamp as composite primary key to allow
    // selection by timestamp.


    // I did not use timeuuid here because we need to be able to write timestamps sometimes.

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   */
  public static void install(CassandraAdmin admin, KijiURI kijiURI, Map<String, String> properties)
      throws IOException {
    // Install the table.  Sadly, we have to just use blobs and byte arrays here, so that we are
    // compliant with everything else in Kiji.  :(
    final CassandraTableName systemTableName = CassandraTableName.getSystemTableName(kijiURI);


    // The layout of this table is straightforward - just blob to blob!
    // TODO: Any check here first for whether the table exists?
    final String tableLayout =
        String.format("CREATE TABLE %s (%s text PRIMARY KEY, %s blob);",

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  public static void uninstall(
      final CassandraAdmin admin,
      final KijiURI kijiURI
  ) throws IOException {
    // TODO: Does this actually need to do anything beyond dropping the table?
    final CassandraTableName tableName = CassandraTableName.getSystemTableName(kijiURI);
    final String delete = CQLUtils.getDropTableStatement(tableName);
    admin.execute(delete);
  }

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   * Install a table for user-defined key-value pairs.
   * @param admin A wrapper around an open C* session.
   * @param uri The KijiURI of the instance for this table.
   */
  public static void install(CassandraAdmin admin, KijiURI uri) {
    CassandraTableName tableName = CassandraTableName.getMetaKeyValueTableName(uri);


    // Standard C* table layout.  Use text key + timestamp as composite primary key to allow
    // selection by timestamp.
    String tableDescription = String.format(
        "CREATE TABLE %s (%s text, %s text, %s timestamp, %s blob, PRIMARY KEY (%s, %s, %s)) "

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      if (familyLayout == null) {
        throw new IllegalArgumentException(
            String.format("Unknown family '%s' in table %s.", family, tableURI));
      }


      final CassandraTableName table =
          CassandraTableName.getLocalityGroupTableName(
              tableURI,
              familyLayout.getLocalityGroup().getId());


      // In Cassandra Kiji, a write to HConstants.LATEST_TIMESTAMP should be a write with the

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    synchronized (mMonitor) {
      final KijiTableLayout layout = mCapsule.getLayout();
      final CassandraKijiTable tableURI = mTable;
      for (LocalityGroupLayout localityGroup : layout.getLocalityGroups()) {
        final ColumnId localityGroupId = localityGroup.getId();
        final CassandraTableName table =
            CassandraTableName.getLocalityGroupTableName(tableURI.getURI(), localityGroupId);


        final Statement delete =
            CQLUtils.getLocalityGroupDeleteStatement(layout, table, entityId);

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