Class ServiceBootContext
- java.lang.Object
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- org.apache.derby.iapi.services.context.ContextImpl
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- org.apache.derby.impl.services.monitor.ServiceBootContext
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- All Implemented Interfaces:
Context
final class ServiceBootContext extends ContextImpl
A context that is used during a service boot to stop cleanup on the stack at this point.
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Constructor Summary
Constructors Constructor Description ServiceBootContext(ContextManager cm)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method 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
isLastHandler(int severity)
Return whether or not this context is the "last" handler for a the specified severity level.-
Methods inherited from class org.apache.derby.iapi.services.context.ContextImpl
appendErrorInfo, getContextManager, getIdName, popMe, pushMe
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Constructor Detail
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ServiceBootContext
ServiceBootContext(ContextManager cm)
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Method Detail
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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).
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isLastHandler
public boolean isLastHandler(int severity)
Description copied from interface:Context
Return whether or not this context is the "last" handler for a the specified severity level. Previously, the context manager would march through all of the contexts in cleanupOnError() and call each of their cleanupOnError() methods. That did not work with server side JDBC, especially for a StatementException, because outer contexts could get cleaned up incorrectly. This functionality is specific to the Language system. Any non-language system contexts should return ExceptionSeverity.NOT_APPLICABLE_SEVERITY. NOTE: Both the LanguageConnectionContext and the JDBC Connection Context are interested in session level errors because they both have clean up to do. This method allows both of them to return false so that all such handlers under them can do their clean up.- Specified by:
isLastHandler
in interfaceContext
- Overrides:
isLastHandler
in classContextImpl
- See Also:
Context.isLastHandler(int)
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