public ConnectionPoolType getConnectionPoolType(){
    String connectionPoolType = getProperty(SERVER_JDBC_CONNECTION_POOL);

    if (connectionPoolType.equals(ConnectionPoolType.C3P0.getName())) {
      return ConnectionPoolType.C3P0;
    }

    return ConnectionPoolType.INTERNAL;
  }
Gets the type of connection pool that EclipseLink should use.

@return default of {@link ConnectionPoolType#INTERNAL}.
ambari-server/src/main/java/org/apache/ambari/server/configuration/Configuration.java