org.apache.derby.impl.db

Class DatabaseContextImpl

java.lang.Object

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

org.apache.derby.impl.db.DatabaseContextImpl

All Implemented Interfaces:

DatabaseContext, Context

final class DatabaseContextImpl
extends ContextImpl
implements DatabaseContext

A context that shutdowns down the database on a databsae exception.

Field Summary

Fields

Modifier and Type	Field and Description
private Database	db

Fields inherited from interface org.apache.derby.iapi.db.DatabaseContext

CONTEXT_ID

Constructor Summary

Constructors

Constructor and Description
DatabaseContextImpl(ContextManager cm, Database db)

Method Summary

Modifier and Type	Method and Description
void	cleanupOnError(java.lang.Throwable t) Contexts will be passed errors that are caught by the outer system when they are serious enough to require corrective action.
boolean	equals(java.lang.Object other)
Database	getDatabase()
int	hashCode()

Methods inherited from class org.apache.derby.iapi.services.context.ContextImpl

appendErrorInfo, getContextManager, getIdName, isLastHandler, popMe, pushMe

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.derby.iapi.services.context.Context

getContextManager, getIdName, isLastHandler, popMe, pushMe

Field Detail

db

private final Database db

Constructor Detail

DatabaseContextImpl

DatabaseContextImpl(ContextManager cm,
                    Database db)

Method Detail

cleanupOnError

public void cleanupOnError(java.lang.Throwable t)

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

equals

public boolean equals(java.lang.Object other)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

getDatabase

public Database getDatabase()

Specified by:

getDatabase in interface DatabaseContext