CD Actual 27/CDROM27.iso/share/wnt/jig/data1.cab/Program_Executable_Files/src/Samples/ProfileNester.java

Java Source | 1998-08-19 | 5.7 KB | 185 lines

/*
 * Copyright (c) 1998 S Cubed. All Rights Reserved.
 *
 * Permission to use, copy, modify, and distribute this software
 * and its documentation for NON-COMMERCIAL purposes and without
 * fee is hereby granted provided that this copyright notice
 * appears in all copies. Please refer to the file "copyright.html"
 * for further important copyright and licensing information.
 *
 * S CUBED MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
 * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
 * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. S CUBED SHALL NOT BE LIABLE FOR
 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
 */

package Samples;

import java.util.*;
import java.io.*;

/**
 * This class provides a utility which accepts a file of
 * java profile information generated by the java -prof option
 * and prints out a call tree of the called methods,
 * their call counts and amounts of time.
 *
 * See the main method for invocation protocol.
 */

public class ProfileNester  {
/**
 * The associations between the callee and the caller.
 */
private Hashtable calleeTable = null;

/**
 * The associations between the callee-caller and the amounts of time spent in the calls.
 */
private Hashtable timesTable = null;

/**
 * The associations between the callee-caller and the counts of calls from caller to callee.
 */
private Hashtable countsTable = null;

/**
 * A string for formatting the indentation representing the nesting level.
 */
private static String TabString = "    ";

/**
 * Constructs an initialized ProfileNester.
 */
ProfileNester  (  ) {
    calleeTable = new Hashtable();
    timesTable = new Hashtable();
    countsTable = new Hashtable();
    }
/**
 * Captures the information from the profile file.
 * Parse the fields from the java.prof file populating association tables.
 *
 * @param filename the complete file name of the java.prof file
 */
void parse(String filename) {

    BufferedReader br = null;    // open the file for readLine() access
    try {
        br = new BufferedReader(
    new InputStreamReader(
    new FileInputStream(filename)));
        } catch (IOException e) {
        System.err.println(filename + ", "+ e);
        return;
        }

    String line = null;
    String callee = null;
    String caller = null;
    String times = null;
    String counts = null;

    try { while ((line = br.readLine()) != null) { // get the next line

    // parse line delimited by spaces
        StringTokenizer st = new StringTokenizer(line);

    // cases are ordinal positions of tokens
    for (int i=0;st.hasMoreTokens();i++) switch (i){
            case 0:
            counts = st.nextToken();
        if (counts.equals("handles_used:")) return;
            break;

            case 1:
            callee = st.nextToken();
            break;

            case 2:
            caller = st.nextToken();
            if (caller.charAt(0) == '<') caller += " " + st.nextToken();
            break;

            case 3:
            times = st.nextToken();
            break;

            default:;
            }

    // load up the association tables
    calleeTable.put(callee,caller);
    timesTable.put(callee+caller,times);
    countsTable.put(callee+caller,counts);
        }
        } catch (IOException e) {
        System.err.println(filename + ", "+ e);
        return;
        }
    }
/**
 * Invokes the ProfileNester service.
 * To invoke this utility call ProfileNester,
 * Usage: ProfileNester java.prof caller_entry_point
 * where java.prof is the file generated by the java -prof option
 * and caller_entry_point is the desired root node of the call tree,
 * this must match exactly the desired caller as specified in the java.prof file
 *
 * For example, running Samples.GetQuotes with jdk1.1.6\bin\java_g -prof
 * (jdk1.2beta3\bin\java -Xprof), see GetQuotes.main() for protocols,
 * or, running it in the debugger with a Debug option of -prof,
 * will produce a java.prof that this example will process.
 * Create the java.prof file, then from the JIG Browser,
 * highlight this command line and select run,
 * <pre>
Samples.ProfileNester ..\Samples\java.prof Samples/GetQuotes.main([Ljava/lang/String;)V
</pre>
 *
 * @param args    command line argument list
 */
public static void main(String args[]) {
    ProfileNester pn = new ProfileNester();
    if (args.length != 2) {
        System.out.println("Usage: ProfileNester java.prof caller_entry_point");
        System.exit(1);
        }
    pn.parse(args[0]);
    System.out.println(args[1] + " [count, time]");
    pn.call(args[1],0);
    System.exit(1);
    }
/**
 * Prints nested nodes in the call tree.
 * Recursively called method to print out the next node in the call tree.
 * A new nesting level is indicated by increased indentation.
 *
 * @param caller the name of the calling method
 * @param tab the numeric value of the nesting level
 */
void call  (String caller,int tab) {
    tab++;    // set indentation for this level

    // iterate through "callee" associations to find match for caller
    for (Enumeration e = calleeTable.keys() ; e.hasMoreElements() ;) {
        String name = (String) e.nextElement();

    // if match is found print a formatted node
        if (calleeTable.get(name).equals(caller)) {
            for (int i=0;i<tab;i++) System.out.print(TabString);
            System.out.println(
            name
            +" ["
            +countsTable.get(name+calleeTable.get(name))
            +", "
            +timesTable.get(name+calleeTable.get(name))
            +"]"
            );
            call(name,tab);
            }
        }
    }
}