Package org.apache.tomcat.dbcp.pool2.impl

Class NoOpCallStack

java.lang.Object

org.apache.tomcat.dbcp.pool2.impl.NoOpCallStack

All Implemented Interfaces:

CallStack

public class NoOpCallStack
extends Object
implements CallStack

CallStack strategy using no-op implementations of all functionality. Can be used by default when abandoned object logging is disabled.

Since:

2.5

Field Summary

Fields

Modifier and Type	Field	Description
static final CallStack	INSTANCE	Singleton instance.

Method Summary

Modifier and Type	Method	Description
void	clear()	Clears the current stack trace snapshot.
void	fillInStackTrace()	Takes a snapshot of the current call stack.
boolean	printStackTrace(PrintWriter writer)	Prints the current stack trace if available to a PrintWriter.

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE

public static final CallStack INSTANCE

Singleton instance.

Method Details

clear

public void clear()

Description copied from interface: CallStack

Clears the current stack trace snapshot. Subsequent calls to CallStack.printStackTrace(PrintWriter) will be no-ops until another call to CallStack.fillInStackTrace().

Specified by:

clear in interface CallStack

fillInStackTrace

public void fillInStackTrace()

Description copied from interface: CallStack

Takes a snapshot of the current call stack. Subsequent calls to CallStack.printStackTrace(PrintWriter) will print out that stack trace until it is cleared.

Specified by:

fillInStackTrace in interface CallStack

printStackTrace

public boolean printStackTrace(PrintWriter writer)

Description copied from interface: CallStack

Prints the current stack trace if available to a PrintWriter. The format is undefined and is primarily useful for debugging issues with PooledObject usage in user code.

Specified by:

printStackTrace in interface CallStack

Parameters:

writer - a PrintWriter to write the current stack trace to if available

Returns:

true if a stack trace was available to print or false if nothing was printed