2010-11-09 Francois Chouinard <fchouinard@gmail.com> Contribution for Bug315307

[deliverable/tracecompass.git] / org.eclipse.linuxtools.lttng.ui / src / org / eclipse / linuxtools / lttng / ui / TraceDebug.java

package org.eclipse.linuxtools.lttng.ui;\r
\r
import java.io.FileWriter;\r
import java.io.IOException;\r
import java.io.PrintWriter;\r
import java.text.SimpleDateFormat;\r
import java.util.Date;\r
\r
import org.eclipse.core.runtime.ILog;\r
import org.eclipse.core.runtime.IStatus;\r
import org.eclipse.core.runtime.Platform;\r
import org.eclipse.core.runtime.Plugin;\r
import org.eclipse.core.runtime.Status;\r
\r
@SuppressWarnings("nls")\r
public class TraceDebug {\r
	static boolean DEBUG = false;\r
	static boolean INFO = false;\r
	static boolean WARN = false;\r
\r
	static boolean CFV = false;\r
	static boolean RV = false;\r
\r
	private static Plugin plugin = LTTngUiPlugin.getDefault();\r
	private static String pluginID = LTTngUiPlugin.PLUGIN_ID;\r
	private static SimpleDateFormat stimeformat = new SimpleDateFormat("HH:mm:ss:SSS");\r
\r
	// Note: files are created in $HOME\r
	static private PrintWriter fCFVfile = null;\r
	static private PrintWriter fRVfile  = null;\r
\r
	public static void init() {\r
		// Update Trace configuration options\r
		String debugTrace = Platform.getDebugOption(pluginID + "/debug");\r
		String infoTrace = Platform.getDebugOption(pluginID + "/info");\r
		String warnTrace = Platform.getDebugOption(pluginID + "/warn");\r
\r
		if (debugTrace != null) {\r
			DEBUG = (new Boolean(debugTrace)).booleanValue();\r
		}\r
\r
		if (infoTrace != null) {\r
			INFO = (new Boolean(infoTrace)).booleanValue();\r
		}\r
\r
		if (warnTrace != null) {\r
			WARN = (new Boolean(warnTrace)).booleanValue();\r
		}\r
\r
		String cfvTrace = Platform.getDebugOption(pluginID + "/cfv");\r
		if (cfvTrace != null) {\r
			CFV = (new Boolean(cfvTrace)).booleanValue();\r
			if (CFV) {\r
				try {\r
					fCFVfile = new PrintWriter(new FileWriter("CFVTrace.txt"));\r
				} catch (IOException e) {\r
					e.printStackTrace();\r
				}\r
			}\r
		}\r
\r
		String rvTrace = Platform.getDebugOption(pluginID + "/rv");\r
		if (rvTrace != null) {\r
			RV = (new Boolean(rvTrace)).booleanValue();\r
			if (RV) {\r
				try {\r
					fRVfile = new PrintWriter(new FileWriter("RVTrace.txt"));\r
				} catch (IOException e) {\r
					e.printStackTrace();\r
				}\r
			}\r
		}\r
	}\r
\r
	public static void stop() {\r
		if (fCFVfile != null) {\r
			fCFVfile.close();\r
			fCFVfile = null;\r
		}\r
\r
		if (fRVfile != null) {\r
			fRVfile.close();\r
			fRVfile = null;\r
		}\r
	}\r
\r
	public static void traceCFV(String trace) {\r
		if (CFV && fCFVfile != null) {\r
			fCFVfile.println(trace);\r
			fCFVfile.flush();\r
		}\r
	}\r
\r
	public static void traceRV(String trace) {\r
		if (RV && fRVfile != null) {\r
			fRVfile.println(trace);\r
			fRVfile.flush();\r
		}\r
	}\r
\r
	public static void info(String message) {\r
		if (INFO) {\r
			ILog logger = plugin.getLog();\r
			logger.log(new Status(IStatus.INFO, LTTngUiPlugin.PLUGIN_ID,\r
					IStatus.OK, message, null));\r
		}\r
	}\r
\r
	public static void warn(String message) {\r
		if (WARN) {\r
			ILog logger = plugin.getLog();\r
			logger.log(new Status(IStatus.WARNING, LTTngUiPlugin.PLUGIN_ID,\r
					IStatus.WARNING, message, null));\r
		}\r
	}\r
\r
	public static void debug(String message) {\r
		if (DEBUG) {\r
			String location = getCallingLocation();\r
			System.out.println(location + "\n\t-> " + message);\r
\r
		}\r
	}\r
\r
	public static void debug(String message, int additionalStackLines) {\r
		if (DEBUG) {\r
			String location = getCallingLocation(additionalStackLines);\r
			System.out.println(location + "\n\t-> " + message);\r
		}\r
	}\r
\r
	public static void throwException(String message) {\r
		if (DEBUG) {\r
			try {\r
				triggerException(message);\r
			} catch (Exception e) {\r
				e.printStackTrace();\r
			}\r
		}\r
	}\r
\r
	private static void triggerException(String message) throws Exception {\r
		throw new Exception(message);\r
	}\r
\r
	private static String getCallingLocation() {\r
		StringBuilder sb = new StringBuilder();\r
		sb.append(trace(Thread.currentThread().getStackTrace(), 4));\r
		sb.append("\n" + trace(Thread.currentThread().getStackTrace(), 3));\r
		return sb.toString();\r
	}\r
\r
	private static String getCallingLocation(int numOfStackLines) {\r
		int stackCalledFromIdx = 3;\r
		int earliestRequested = numOfStackLines > 0 ? stackCalledFromIdx\r
				+ numOfStackLines : stackCalledFromIdx;\r
		StringBuilder sb = new StringBuilder();\r
		for (int i = earliestRequested; i >= stackCalledFromIdx; i--) {\r
			sb.append(trace(Thread.currentThread().getStackTrace(), i) + "\n");\r
		}\r
		return sb.toString();\r
	}\r
\r
	private static String trace(StackTraceElement e[], int level) {\r
		if (e != null) {\r
			level = level >= e.length ? e.length - 1 : level;\r
			StackTraceElement s = e[level];\r
			if (s != null) {\r
				String simpleClassName = s.getClassName();\r
				String[] clsNameSegs = simpleClassName.split("\\.");\r
				if (clsNameSegs.length > 0)\r
					simpleClassName = clsNameSegs[clsNameSegs.length - 1];\r
				return stimeformat.format(new Date()) + " " + simpleClassName\r
						+ "." + s.getLineNumber() + "." + s.getMethodName();\r
			}\r
		}\r
\r
		return null;\r
	}\r
\r
	public static boolean isDEBUG() {\r
		return DEBUG;\r
	}\r
\r
	public static boolean isINFO() {\r
		return INFO;\r
	}\r
\r
	public static boolean isWARN() {\r
		return WARN;\r
	}\r
\r
	public static boolean isCFV() {\r
		return CFV;\r
	}\r
\r
	public static boolean isRV() {\r
		return RV;\r
	}\r
}\r