Field Detail

• connRef

  private java.lang.ref.SoftReference<EmbedConnection> connRef

  We hold a soft reference to the connection so that when the application releases its reference to the Connection without closing it, its finalize method will be called, which will then close the connection. If a direct reference is used here, such a Connection will never be closed or garbage collected as modules hold onto the ContextManager and thus there would be a direct reference through this object.

Constructor Detail

• EmbedConnectionContext

  EmbedConnectionContext​(ContextManager cm,
                         EmbedConnection conn)

Method Detail

• cleanupOnError

  public void cleanupOnError​(java.lang.Throwable error)

  Description copied from interface: Context
  Contexts will be passed errors that are caught by the outer system when they are serious enough to require corrective action. They will be told what the error is, so that they can react appropriately. Most of the time, the contexts will react by either doing nothing or by removing themselves from the context manager. If there are no other references to the context, removing itself from the manager equates to freeing it.
  On an exception that is session severity or greater the Context must push itself off the stack. This is to ensure that after a session has been closed there are no Contexts on the stack that potentially hold references to objects, thus delaying their garbage collection.

  Contexts must release all their resources before removing themselves from their context manager.

  The context manager will "unwind" the contexts during cleanup in the reverse order they were placed on its global stack.

  If error is an instance of StandardException then an implementation of this method may throw a new exception if and only if the new exception is an instance of StandardException that is more severe than the original error or the new exception is a not an instance of StandardException (e.g java.lang.NullPointerException).

  Specified by:

  cleanupOnError in interface Context

• getNestedConnection

  public java.sql.Connection getNestedConnection​(boolean internal)
                                          throws java.sql.SQLException

  Get a connection equivalent to the call

                  DriverManager.getConnection("jdbc:default:connection");
                  

  Specified by:

  getNestedConnection in interface ConnectionContext

  Throws:

  java.sql.SQLException - Parent connection has been closed.

• getResultSet

  public java.sql.ResultSet getResultSet​(ResultSet executionResultSet)
                                  throws java.sql.SQLException

  Get a jdbc ResultSet based on the execution ResultSet.

  Specified by:

  getResultSet in interface ConnectionContext

  Parameters:

  executionResultSet - a result set as gotten from execution

  Throws:

  java.sql.SQLException - on error

• processInaccessibleDynamicResult

  public boolean processInaccessibleDynamicResult​(java.sql.ResultSet resultSet)

  Process a ResultSet from a procedure to be a dynamic result, but one that will be closed due to it being inaccessible. We cannot simply close the ResultSet as it the nested connection that created it might be closed, leading to its close method being a no-op. This performs all the conversion (linking the ResultSet to a valid connection) required but does not close the ResultSet.

  Specified by:

  processInaccessibleDynamicResult in interface ConnectionContext

  Parameters:

  resultSet - ResultSet to process.

  Returns:

  True if this ResultSet was created by this connection and the result set is open. False otherwise.

  See Also:

  EmbedStatement.processDynamicResult(EmbedConnection, java.sql.ResultSet, EmbedStatement)

• privilegedGetLCC

  private LanguageConnectionContext privilegedGetLCC​(EmbedConnection conn)

  Private, privileged lookup of the lcc..