From 1fe315346425dcdea73feebd431aba7ae2a75f61 Mon Sep 17 00:00:00 2001
From: Glyn Normington
Date: Tue, 20 Apr 2010 15:38:13 +0100
Subject: [bug 307650] initial check-in from dm Server Virgo medic
 0a647883a0176f60d8572f51c7eff591b7e408b6

---
 .../org/eclipse/virgo/medic/log/EntryExitTrace.aj  | 99 ++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 org.eclipse.virgo.medic/src/main/java/org/eclipse/virgo/medic/log/EntryExitTrace.aj

(limited to 'org.eclipse.virgo.medic/src/main/java/org/eclipse/virgo/medic/log/EntryExitTrace.aj')

diff --git a/org.eclipse.virgo.medic/src/main/java/org/eclipse/virgo/medic/log/EntryExitTrace.aj b/org.eclipse.virgo.medic/src/main/java/org/eclipse/virgo/medic/log/EntryExitTrace.aj
new file mode 100644
index 0000000..5e4d2c0
--- /dev/null
+++ b/org.eclipse.virgo.medic/src/main/java/org/eclipse/virgo/medic/log/EntryExitTrace.aj
@@ -0,0 +1,99 @@
+/*******************************************************************************
+ * Copyright (c) 2008, 2010 VMware Inc.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *   VMware Inc. - initial contribution
+ *******************************************************************************/
+
+package org.eclipse.virgo.medic.log;
+
+import org.aspectj.lang.JoinPoint;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * An aspect that will advise any method with entry and exit trace logging.
+ * 
+ * <strong>Concurrent Semantics</strong><br />
+ * 
+ * Threadsafe
+ * 
+ */
+public aspect EntryExitTrace pertypewithin(*) {
+	
+	private volatile Logger logger;
+	
+	pointcut performingEntryExitTrace() : cflowbelow(adviceexecution() && within(EntryExitTrace));
+
+    pointcut medic() : within(org.eclipse.virgo.medic..*);
+
+    pointcut util() : within(org.eclipse.virgo.util..*);
+    
+    pointcut logback() : within(ch.qos.logback..*) || within(org.slf4j.impl..*);
+    
+    pointcut infoCandidate() : execution(public * *(..)) && !medic() && !util() && !logback() && !performingEntryExitTrace();
+    
+    pointcut debugCandidate() : execution(!public !private * *(..)) && !medic() && !util() && !logback() && !performingEntryExitTrace();
+    
+    pointcut traceCandidate() : execution(private * *(..)) && !medic() && !util() && !logback() && !performingEntryExitTrace();
+    
+    before() : infoCandidate() {
+        getLogger(thisJoinPointStaticPart).info("{} {}", ">", getSignature(thisJoinPointStaticPart));
+    }
+
+    after() returning : infoCandidate()  {
+        getLogger(thisJoinPointStaticPart).info("{} {}", "<", getSignature(thisJoinPointStaticPart));
+    }
+
+    after() throwing(Throwable t) : infoCandidate()  {
+        Logger logger = getLogger(thisJoinPointStaticPart);
+        if (logger.isInfoEnabled()) {
+            logger.info(String.format("< %s", getSignature(thisJoinPointStaticPart)), t);
+        }
+    }
+
+    before() : debugCandidate() {
+        getLogger(thisJoinPointStaticPart).debug("{} {}", ">", getSignature(thisJoinPointStaticPart));
+    }
+
+    after() returning : debugCandidate()  {
+        getLogger(thisJoinPointStaticPart).debug("{} {}", "<", getSignature(thisJoinPointStaticPart));
+    }
+
+    after() throwing(Throwable t) : debugCandidate()  {
+        Logger logger = getLogger(thisJoinPointStaticPart);
+        if (logger.isDebugEnabled()) {
+            logger.debug(String.format("< %s", getSignature(thisJoinPointStaticPart)), t);
+        }
+    }
+    
+    before() : traceCandidate() {
+        getLogger(thisJoinPointStaticPart).trace("{} {}", ">", getSignature(thisJoinPointStaticPart));
+    }
+
+    after() returning : traceCandidate()  {
+        getLogger(thisJoinPointStaticPart).trace("{} {}", "<", getSignature(thisJoinPointStaticPart));
+    }
+
+    after() throwing(Throwable t) : traceCandidate()  {
+        Logger logger = getLogger(thisJoinPointStaticPart);
+        if (logger.isTraceEnabled()) {
+            logger.trace(String.format("< %s", getSignature(thisJoinPointStaticPart)), t);
+        }
+    }
+
+    private Logger getLogger(JoinPoint.StaticPart sp) {
+    	if (this.logger == null) {
+    		this.logger = LoggerFactory.getLogger(sp.getSignature().getDeclaringType());
+    	}
+    	return this.logger;
+    }
+
+    private String getSignature(JoinPoint.StaticPart sp) {
+        return sp.getSignature().toLongString();
+    }
+}
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