Merge pull request #30 from damienbiggs/topic/exception

Logging: Log stack trace if exception message is null

src/main/java/org/jenkinsci/plugins/vsphere/VSphereBuildStepContainer.java

@@ -69,15 +69,16 @@ public VSphereBuildStep getBuildStep() {
 
 	@Override
 	public boolean perform(final AbstractBuild<?, ?> build, final Launcher launcher, final BuildListener listener)  {
-		try {
+        VSphere vsphere = null;
+        try {
             EnvVars env = build.getEnvironment(listener);
             env.overrideAll(build.getBuildVariables()); // Add in matrix axes..
             String expandedServerName = env.expand(serverName);
 
             startLogs(listener.getLogger(), expandedServerName);
 			//Need to ensure this server is same as one that was previously saved.
 			//TODO - also need to improve logging here.
-			VSphere vsphere;
+
             // select by hash if we have one
             if (serverHash != null) {
                 vsphere = VSphereBuildStep.VSphereBuildStepDescriptor.getVSphereCloudByHash(serverHash).vSphereInstance();
@@ -86,15 +87,16 @@ public boolean perform(final AbstractBuild<?, ?> build, final Launcher launcher,
             }
 
 			buildStep.setVsphere(vsphere);
-
-                        Boolean buildStepResult = buildStep.perform(build, launcher, listener);
-                        vsphere.disconnect();
 
-			return buildStepResult;
+            return buildStep.perform(build, launcher, listener);
 		} catch (Exception e) {
-			VSphereLogger.vsLogger(listener.getLogger(), e.getMessage());
-		}
-		return false;	
+			VSphereLogger.vsLogger(listener.getLogger(), e);
+		} finally {
+            if (vsphere != null) {
+                vsphere.disconnect();
+            }
+        }
+        return false;
 	}
 
 	private void startLogs(PrintStream logger, String serverName){

src/main/java/org/jenkinsci/plugins/vsphere/tools/VSphereLogger.java

@@ -23,12 +23,23 @@ public class VSphereLogger {
 	 * checks the verboseOutput flag and writes to the logger as appropriate.
 	 * 
 	 * @param logger - logger that should receive the information
-	 * @param log - string to be sent to the stream
-	 * @param force - forces the output the stream, overwriting the verboseOutput flag.
 	 */
 	public static void vsLogger(PrintStream logger, String str){
 		if(logger!=null){
 			logger.println("["+Messages.VSphereLogger_title()+"] "+str);
 		}
 	}
+
+    public static void vsLogger(PrintStream logger, Exception e){
+        if(logger ==null) {
+            return;
+        }
+
+        if (e.getMessage() != null) {
+            logger.println("["+Messages.VSphereLogger_title()+"] Exception: " + e.getMessage());
+        } else {
+            logger.println("["+Messages.VSphereLogger_title()+"] Exception message was null, stack trace");
+            e.printStackTrace(logger);
+        }
+    }
 }