From 6bf6295895351381b81fdf1cb625ea8e81032c1a Mon Sep 17 00:00:00 2001
From: mwebster <mwebster>
Date: Mon, 14 Aug 2006 15:51:34 +0000
Subject: [PATCH] Bug 150487 "Tracing and Logging Framework" (override
 TraceFactory, trace info, warn, error, fatal by default)

---
 .../aspectj/weaver/tools/DefaultTrace.java    | 27 +++++----------
 .../aspectj/weaver/tools/TraceFactory.java    | 33 +++++++++++++++++--
 2 files changed, 39 insertions(+), 21 deletions(-)

diff --git a/weaver/src/org/aspectj/weaver/tools/DefaultTrace.java b/weaver/src/org/aspectj/weaver/tools/DefaultTrace.java
index b50c081ec..ddb03dbb5 100644
--- a/weaver/src/org/aspectj/weaver/tools/DefaultTrace.java
+++ b/weaver/src/org/aspectj/weaver/tools/DefaultTrace.java
@@ -56,38 +56,27 @@ public class DefaultTrace extends AbstractTrace {
 		}
 	}
 	public void debug (String message) {
-		if (traceEnabled) {
-			println(formatMessage("?",message,null));
-		}
+		println(formatMessage("?",message,null));
 	}
 
 	public void info(String message) {
-		if (traceEnabled) {
-			println(formatMessage("I",message,null));
-		}
+		println(formatMessage("I",message,null));
 	}
 
 	public void warn (String message, Throwable th) {
-		if (traceEnabled) {
-			println(formatMessage("W",message,th));
-			if (th != null) th.printStackTrace();
-		}
+		println(formatMessage("W",message,th));
+		if (th != null) th.printStackTrace();
 	}
 
 
 	public void error (String message, Throwable th) {
-		if (traceEnabled) {
-			println(formatMessage("E",message,th));
-			if (th != null) th.printStackTrace();
-		}
-		
+		println(formatMessage("E",message,th));
+		if (th != null) th.printStackTrace();
 	}
 
 	public void fatal (String message, Throwable th) {
-		if (traceEnabled) {
-			println(formatMessage("X",message,th));
-			if (th != null) th.printStackTrace();
-		}
+		println(formatMessage("X",message,th));
+		if (th != null) th.printStackTrace();
 	}
 
 	/**
diff --git a/weaver/src/org/aspectj/weaver/tools/TraceFactory.java b/weaver/src/org/aspectj/weaver/tools/TraceFactory.java
index beaaf862a..dedceeadb 100644
--- a/weaver/src/org/aspectj/weaver/tools/TraceFactory.java
+++ b/weaver/src/org/aspectj/weaver/tools/TraceFactory.java
@@ -16,9 +16,10 @@ public abstract class TraceFactory {
     
 	public final static String DEBUG_PROPERTY = "org.aspectj.tracing.debug";
 	public final static String FACTORY_PROPERTY = "org.aspectj.tracing.factory";
+	public final static String DEFAULT_FACTORY_NAME = "default";
 	
     private static boolean debug = getBoolean(DEBUG_PROPERTY,false); 
-    private static TraceFactory instance = new DefaultTraceFactory();
+    private static TraceFactory instance;
     
     public Trace getTrace (Class clazz) {
     	return instance.getTrace(clazz);
@@ -35,7 +36,28 @@ public abstract class TraceFactory {
 	}
 
 	static {
-    	try {
+		
+		/*
+		 * Allow user to override default behaviour or specify their own factory 
+		 */
+		String factoryName = System.getProperty(FACTORY_PROPERTY);
+		if (factoryName != null) try {
+			if (factoryName.equals(DEFAULT_FACTORY_NAME)) {
+				instance = new DefaultTraceFactory();
+			}
+			else {
+	    		Class factoryClass = Class.forName(factoryName);
+	    		instance = (TraceFactory)factoryClass.newInstance();
+			}
+		}
+    	catch (Throwable th) {
+    		if (debug) th.printStackTrace();
+    	}
+    	
+		/*
+		 * Try to load external trace infrastructure using supplied factories
+		 */
+    	if (instance == null) try {
 			if (LangUtil.is15VMOrGreater()) {
 	    		Class factoryClass = Class.forName("org.aspectj.weaver.tools.Jdk14TraceFactory");
 	    		instance = (TraceFactory)factoryClass.newInstance();
@@ -47,6 +69,13 @@ public abstract class TraceFactory {
     	catch (Throwable th) {
     		if (debug) th.printStackTrace();
     	}
+
+    	/*
+		 * Use default trace 
+		 */
+    	if (instance == null) {
+    	    instance = new DefaultTraceFactory();
+    	}
     	
     	if (debug) System.out.println("TraceFactory.instance=" + instance);
     }
-- 
2.39.5