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Java Source Code / Java Documentation » Science » Cougaar12_4 » org.cougaar.util

Source Cross Reference

Class Diagram

Java Document (Java Doc)

java.lang .Object

org.cougaar.util .CallerTracker

CallerTracker
abstract public class CallerTracker (Code)
	A set of utilities for tracking method invocations by stack. Typically used to reduce repetitive warnings by only emitting one complaint per caller.

Inner Class :protected static class ShallowTracker extends CallerTracker

Inner Class :protected static class PredicateTracker extends CallerTracker

Field Summary
final protected HashSet	set

Constructor Summary
protected	CallerTracker()

Method Summary
protected Object	checkFrame(Throwable t)
abstract protected Object	getKey(Throwable t) compute a set object from the throwable's stack.
public static CallerTracker	getPredicateTracker(UnaryPredicate p) Construct a CallerTracker which discriminates between contexts based only on stack frame selected by the predicate.
public static CallerTracker	getShallowTracker()
public static CallerTracker	getShallowTracker(int i) Construct a CallerTracker which discriminates between contexts based only on the stack frame the specified number of frames above the frame which invokes #isNew(). A typical use would be to track callers of a particular method foo().
public boolean	isNew()
public Object	isNewFrame()

Field Detail

set
final protected HashSet set(Code)

Constructor Detail

CallerTracker
protected CallerTracker()(Code)

Method Detail

checkFrame
protected Object checkFrame(Throwable t)(Code)

getKey
abstract protected Object getKey(Throwable t)(Code)
	compute a set object from the throwable's stack. May return null if it cannot compute a useful key.

getPredicateTracker
public static CallerTracker getPredicateTracker(UnaryPredicate p)(Code)
	Construct a CallerTracker which discriminates between contexts based only on stack frame selected by the predicate. The predicate is invoked on the class names of frames of the stack (innermost first, skipping the first one that is a CallerTracker frame), until the predicate returns true. The whole selected frame is the one used as the key.

getShallowTracker
public static CallerTracker getShallowTracker()(Code)
	Alias for getShallowTracker(1)

getShallowTracker
public static CallerTracker getShallowTracker(int i)(Code)
	Construct a CallerTracker which discriminates between contexts based only on the stack frame the specified number of frames above the frame which invokes #isNew(). A typical use would be to track callers of a particular method foo(). In the class foo, define a static member which has a ShallowTracker(1) and then modify the foo() method to emit a log message IFF tracker.isNew() is true.

isNew
public boolean isNew()(Code)

isNewFrame
public Object isNewFrame()(Code)

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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