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/**
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* '$RCSfile$'
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* Copyright: 2010 Regents of the University of California and the
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* National Center for Ecological Analysis and Synthesis
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*
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* '$Author: $'
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* '$Date: 2009-06-13 15:28:13 +0300 $'
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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package edu.ucsb.nceas.metacat;
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import java.io.File;
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import java.io.FileWriter;
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import java.io.IOException;
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import java.util.Date;
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import java.util.Enumeration;
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import java.util.Hashtable;
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import java.util.Vector;
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/**
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* @author berkley
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* Singleton to track metacat profile stats and print them to a CSV file
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*/
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public class MetacatProfiler
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{
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private static MetacatProfiler profiler = null;
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private Hashtable<String,Profile> profiles;
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private String log = "";
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private int callOrderCount = 0;
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private boolean aggregateMethodCalls = true;
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/**
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* private constructor
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*/
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private MetacatProfiler()
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{
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profiles = new Hashtable<String,Profile>();
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}
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/**
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* get a singleton instance
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* @return
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*/
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public static MetacatProfiler getInstance()
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{
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if(profiler == null)
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{
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profiler = new MetacatProfiler();
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}
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return profiler;
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}
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/**
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* return a hashtable of the profiles
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* @return
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*/
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public Hashtable<String, Profile> getProfiles()
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{
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return profiles;
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}
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/**
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* reset all times in the singleton
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*/
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public void reset()
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{
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profiles = new Hashtable<String, Profile>();
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log = "";
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}
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/**
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* print a message to the log in real-time
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* @param msg
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*/
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public void printLogMsg(String msg)
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{
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log += "//" + new Date().toString() + ":" + msg + "\n";
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}
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/**
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* start the timing on a profile
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* @param profileName
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*/
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public void startTime(String profileName)
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{
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long start = new Date().getTime();
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Profile p = profiles.get(profileName);
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if(!aggregateMethodCalls || p == null)
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{
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p = new Profile();
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p.name = profileName;
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p.start = start;
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p.methodcalls = 0;
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p.total = 0;
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p.callorder = callOrderCount;
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callOrderCount++;
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profiles.put(profileName, p);
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}
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else
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{
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p.start = start;
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profiles.put(profileName, p);
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}
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}
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/**
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* stop the timing on a profile
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* @param profileName
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*/
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public void stopTime(String profileName)
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{
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//System.out.println("\n==================stop==================");
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long stop = new Date().getTime();
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boolean found = false;
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Profile p = profiles.get(profileName);
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if(p == null)
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{
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System.out.println("WARNING: profile " + profileName + " not registered with MetacatProfiler");
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}
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else
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{
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p.stop = stop;
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}
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if(!aggregateMethodCalls)
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{
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log += p.toString();
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}
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else
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{
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if(p != null)
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{
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//System.out.println("p: " + p.toString());
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p.total += p.stop - p.start;
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p.methodcalls = p.methodcalls + 1;
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//System.out.println("newp: " + p.toString());
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profiles.put(profileName, p);
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}
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else
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{
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p = new Profile();
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p.methodcalls = 1;
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profiles.put(profileName, p);
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}
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}
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}
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/**
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* sort the profiles by "callorder", "callcount" or "total"
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* @param sortKey
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* @return
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*/
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public Profile[] sortProfiles(String sortKey)
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{
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Vector<Profile> v = new Vector<Profile>();
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Enumeration keys = profiles.keys();
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Profile[] pArr = new Profile[profiles.size()];
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int i = 0;
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while(keys.hasMoreElements())
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{
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String key = (String)keys.nextElement();
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pArr[i] = profiles.get(key);
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i++;
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}
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int n = profiles.size();
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for (int pass=1; pass < n; pass++) { // count how many times
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// This next loop becomes shorter and shorter
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for (i=0; i < n-pass; i++) {
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long x = 0;
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long y = 0;
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if(sortKey.equals("callorder"))
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{
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x = pArr[i].callorder;
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y = pArr[i+1].callorder;
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}
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else if(sortKey.equals("callcount"))
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{
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x = pArr[i].methodcalls;
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y = pArr[i+1].methodcalls;
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}
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else
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{ //default by total
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x = pArr[i].total;
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y = pArr[i+1].total;
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}
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if (x < y) {
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// exchange elements
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Profile temp = pArr[i];
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pArr[i] = pArr[i+1];
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pArr[i+1] = temp;
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}
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}
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}
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return pArr;
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}
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/**
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* print a sorted CSV file. The sortKey can be "callorder", "callcount" or "total"
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* @param f
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* @param sortKey
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* @throws IOException
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*/
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public void printSortedCSV(File f, String sortKey) throws IOException
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{
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Profile[] p = sortProfiles(sortKey);
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String log2 = "";
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log2 = "\n" + log + "\n" + "=======profile entries sorted by " + sortKey + "========\n";
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for(int i=0; i<p.length; i++)
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{
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log2 += p[i].toString() + "\n";
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}
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log2 += "=======end profile entries========";
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System.out.println(log2);
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if(f != null)
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{
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FileWriter fw = new FileWriter(f, true);
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fw.write(log2);
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fw.flush();
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fw.close();
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}
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}
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/**
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* print the CSV file with no sorting
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* @param f
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* @throws IOException
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*/
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public void printCSV(File f) throws IOException
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{
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if(aggregateMethodCalls)
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{
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Enumeration keys = profiles.keys();
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while(keys.hasMoreElements())
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{
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String key = (String)keys.nextElement();
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Profile p = profiles.get(key);
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log += p.toString();
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}
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}
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FileWriter fw = new FileWriter(f, true);
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fw.write(log);
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fw.flush();
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fw.close();
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}
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/**
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* container class for profile information
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* @author berkley
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*
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*/
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public class Profile
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{
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public long start;
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public long stop;
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public long total = -1;
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public long methodcalls;
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public long callorder;
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public String name;
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public String toString()
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{
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if(total == -1)
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{
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total = stop - start;
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}
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return "name: " + name + ", calls: " + methodcalls + ", totaltime: " + total;
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}
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}
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}
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