Package org.apache.calcite.avatica

Class HandlerImpl

  • All Implemented Interfaces:
    Handler
    public class HandlerImpl
extends java.lang.Object
implements Handler
    Implementation of Handler that does nothing for each callback. It is recommended implementations of Handler use this as a base class, to ensure forward compatibility.

    • Constructor Detail

      • HandlerImpl

        public HandlerImpl()

    • Method Detail

      • onConnectionInit

        public void onConnectionInit​(AvaticaConnection connection)
                      throws java.sql.SQLException
        Description copied from interface: Handler
        Called by container when a connection is being created.

        If the implementation of this method throws, the connection will not be created.

        Specified by:
        onConnectionInit in interface Handler
        Parameters:
        connection - Connection
        Throws:
        java.sql.SQLException - on error

      • onConnectionClose

        public void onConnectionClose​(AvaticaConnection connection)
        Description copied from interface: Handler
        Called by container when a connection is being closed.

        If the implementation of this method throws, the call to Connection.close() that triggered this method will throw an exception, but the connection will still be marked closed.

        Specified by:
        onConnectionClose in interface Handler
        Parameters:
        connection - Connection

      • onStatementExecute

        public void onStatementExecute​(AvaticaStatement statement,
                               Handler.ResultSink resultSink)
        Description copied from interface: Handler
        Called by container when a statement is being executed.

        If the session would like the statement results stored in a temporary table, resultSink is not null. The provider must call its Handler.ResultSink.toBeCompleted() method at some point during execution (not necessarily before the call to this method returns).

        Specified by:
        onStatementExecute in interface Handler
        Parameters:
        statement - Statement
        resultSink - Place to put result of query. Null if container does not want results stored to a temporary table

      • onStatementClose

        public void onStatementClose​(AvaticaStatement statement)
        Description copied from interface: Handler
        Called by container when a statement is being closed.

        This method is called after marking the statement closed, and after closing any open ResultSet objects.

        If the implementation of this method throws, the call to Statement.close() that triggered this method will throw an exception, but the statement will still be marked closed.

        Specified by:
        onStatementClose in interface Handler
        Parameters:
        statement - Statement