Examples of HiveSemaphoreImpl

org.hivedb.meta.HiveSemaphoreImpl
HiveSemaphore coordinates the Hive-global write lock, and provides a Hive revision counter which indicates signals that a new partition dimension, secondary partition, or node is introduced. @author Justin McCarthy (jmccarthy@cafepress.com)

Examples of org.hivedb.meta.HiveSemaphoreImpl

    HiveSemaphore hs;
    if (doesHiveSemaphoreExist())
      hs = get();
    else {
      JdbcTemplate j = getJdbcTemplate();
      hs = new HiveSemaphoreImpl(Status.writable, 1);
      Object[] parameters = new Object[]{hs.getStatus().getValue(), hs.getRevision()};
      try {
        j.update("INSERT INTO semaphore_metadata (status,revision) VALUES (?,?)", parameters);
      } catch (BadSqlGrammarException e) {
        throw new HiveSemaphoreNotFound(e.getMessage());

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Examples of org.hivedb.meta.HiveSemaphoreImpl

    return exists;
  }


  protected class HiveSemaphoreRowMapper implements RowMapper {
    public Object mapRow(ResultSet rs, int rowNumber) throws SQLException {
      return new HiveSemaphoreImpl(Status.getByValue(rs.getInt("status")), rs.getInt("revision"));
    }

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