NoOpCallStack (Apache Tomcat 10.0.27 API Documentation)

java.lang.Object
- org.apache.tomcat.dbcp.pool2.impl.NoOpCallStack

All Implemented Interfaces:

CallStack
```
public class NoOpCallStack
extends java.lang.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 CallStack INSTANCE
Singleton instance.

Method Summary

All Methods Instance Methods Concrete Methods
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(java.io.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 Detail
  - INSTANCE
```
public static final CallStack INSTANCE
```
    Singleton instance.
- Method Detail
  - 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(java.io.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