Class GenericExecutionContext

java.lang.Object

org.apache.derby.iapi.services.context.ContextImpl

org.apache.derby.impl.sql.execute.GenericExecutionContext

All Implemented Interfaces:

Context, ExecutionContext

class GenericExecutionContext
extends ContextImpl
implements ExecutionContext

ExecutionContext stores the result set factory to be used by the current connection, and manages execution-level connection activities.

An execution context is expected to be on the stack for the duration of the connection.

Field Summary

Fields

Modifier and Type	Field	Description
private ExecutionFactory	execFactory

Fields inherited from interface ExecutionContext

CONTEXT_ID

Constructor Summary

Constructors

Constructor	Description
GenericExecutionContext(ContextManager cm, ExecutionFactory ef)

Method Summary

Modifier and Type	Method	Description
void	cleanupOnError(Throwable error)	Contexts will be passed errors that are caught by the outer system when they are serious enough to require corrective action.
ExecutionFactory	getExecutionFactory()	Get the ExecutionFactory from this ExecutionContext.

Methods inherited from class ContextImpl

appendErrorInfo, getContextManager, getIdName, isLastHandler, popMe, pushMe

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface Context

getContextManager, getIdName, isLastHandler, popMe, pushMe

Field Details

execFactory

private ExecutionFactory execFactory

Constructor Details

GenericExecutionContext

GenericExecutionContext(ContextManager cm,
 ExecutionFactory ef)

Method Details

getExecutionFactory

public ExecutionFactory getExecutionFactory()

Description copied from interface: ExecutionContext

Get the ExecutionFactory from this ExecutionContext.

Specified by:

getExecutionFactory in interface ExecutionContext

Returns:

The Execution factory associated with this ExecutionContext

cleanupOnError

public void cleanupOnError(Throwable error)
                    throws StandardException

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

Throws:

StandardException - Thrown on error