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

Class ThrowableCallStack

java.lang.Object

org.apache.tomcat.dbcp.pool2.impl.ThrowableCallStack

All Implemented Interfaces:

CallStack

public class ThrowableCallStack
extends Object
implements CallStack

CallStack strategy that uses the stack trace from a Throwable. This strategy, while slower than the SecurityManager implementation, provides call stack method names and other metadata in addition to the call stack of classes.

Since:

2.4.3

See Also:

• Throwable.fillInStackTrace()

Constructor Summary

Constructors

Constructor	Description
ThrowableCallStack(String messageFormat, boolean useTimestamp)	Create a new 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

Constructor Details

ThrowableCallStack

public ThrowableCallStack(String messageFormat,
 boolean useTimestamp)

Create a new instance.

Parameters:

messageFormat - message format

useTimestamp - whether to format the dates in the output message or not

Method Details

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

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

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