#78 Added a default failure listener for loading modules

Author: rjrudin

src/main/java/com/marklogic/client/ext/modulesloader/impl/DefaultModulesLoader.java

@@ -57,6 +57,7 @@ public class DefaultModulesLoader extends LoggingObject implements ModulesLoader
 	public DefaultModulesLoader() {
 		this.extensionMetadataProvider = new DefaultExtensionMetadataProvider();
 		this.modulesManager = new PropertiesModuleManager();
+		failureListeners.add(new SimpleLoadModulesFailureListener());
 	}
 
 	public DefaultModulesLoader(AssetFileLoader assetFileLoader) {
@@ -532,4 +533,8 @@ private void updateTimestamp(Resource resource) {
 	public AssetFileLoader getAssetFileLoader() {
 		return assetFileLoader;
 	}
+
+	public List<LoadModulesFailureListener> getFailureListeners() {
+		return failureListeners;
+	}
 }

src/main/java/com/marklogic/client/ext/modulesloader/impl/SimpleLoadModulesFailureListener.java

@@ -0,0 +1,14 @@
+package com.marklogic.client.ext.modulesloader.impl;
+
+import com.marklogic.client.ext.datamovement.listener.LoadModulesFailureListener;
+import com.marklogic.client.ext.helper.LoggingObject;
+
+public class SimpleLoadModulesFailureListener extends LoggingObject implements LoadModulesFailureListener {
+
+	@Override
+	public void processFailure(Throwable throwable) {
+		if (logger.isErrorEnabled()) {
+			logger.error("Error caught while loading modules, cause: " + throwable.getMessage(), throwable);
+		}
+	}
+}