visad.util
Class Trace

java.lang.Object
  visad.util.Trace

public class Trace
extends Object

This class provides a hook into the IDV Trace facility. It uses reflection to call the corresponding ucar.unidata.util.Trace methods if that class can be found. Else, nothing happens. To use this first call: Trace.startTrace();

You can bracket a code segment with:

  Trace.call1("some label");
  ... code
  Trace.call2("some label");
 

This matches the "some label". It will indent subsequent Trace calls to show nesting. You can also just print something out with:

 Trace.msg("some message");
 

The output looks like:

 196  996   >ImageRenderer type.doTransform
 11   99      >ImageRenderer build texture length: 4503200
 2    15        >ImageRenderer new byte
 691  15683     <ImageRenderer new byte ms: 690
 1    1         >ImageRenderer color_bytes
 345  99        <ImageRenderer color_bytes ms: 344
 0    2       <ImageRenderer build texture ms: 1037
 

The first column is the elapsed time since the last print line. The second column is the memory delta (note: GC can make this negative). For the call1/call2 pairs the ms:... shows the time spent in the block.

Constructor Summary

Trace()

Method Summary

static void	call1(String msg) Bracket a block of code with call1("some unique msg"); ...code...; call2("some unique msg"); Where "some unique msg" is used to match up the call1/call2 pairs
static void	call1(String msg, String extra) Bracket a block of code with call1("some unique msg"); ...code...; call2("some unique msg"); Append extra to the end of the line
static void	call2(String msg) Bracket a block of code with call1("some unique msg"); ...code...; call2("some unique msg");
static void	call2(String msg, String extra) Close the call
static void	main(String[] args)
static void	msg(String msg) Print out a line
static void	startTrace() Call this to start tracing
static void	stopTrace() Call this to start tracing

Methods inherited from class java.lang.Object

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

Constructor Detail

Trace

public Trace()

Method Detail

main

public static void main(String[] args)

call1

public static void call1(String msg)

Bracket a block of code with call1("some unique msg"); ...code...; call2("some unique msg"); Where "some unique msg" is used to match up the call1/call2 pairs

call1

public static void call1(String msg,
                         String extra)

Bracket a block of code with call1("some unique msg"); ...code...; call2("some unique msg"); Append extra to the end of the line

startTrace

public static void startTrace()

Call this to start tracing

stopTrace

public static void stopTrace()

Call this to start tracing

call2

public static void call2(String msg)

Bracket a block of code with call1("some unique msg"); ...code...; call2("some unique msg");

call2

public static void call2(String msg,
                         String extra)

Close the call

msg

public static void msg(String msg)

Print out a line