Package org.apache.calcite.avatica

Class HandlerImpl

java.lang.Object
org.apache.calcite.avatica.HandlerImpl
All Implemented Interfaces:
Handler
public class HandlerImpl extends 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 Details

    • HandlerImpl

      public HandlerImpl()

  • Method Details

    • onConnectionInit

      public void onConnectionInit(AvaticaConnection connection) throws 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:
      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