private void sendMultipleEvents(Object obj) {
if (obj instanceof OMElement) {
OMElement events = (OMElement) obj;
if (eventBuilderConfiguration.isTraceEnabled()) {
trace.info("[Event-Builder] Received batch of events as OMElement.\n" + events.toString());
}
Iterator childIterator = events.getChildElements();
while (childIterator.hasNext()) {
Object eventObj = childIterator.next();
sendEvent(eventObj);
/**
* Usually the global lookup '//' is used in the XPATH expression which works fine for
* 'single event mode'. However, if global lookup is used, it will return the first element
* from the whole document as specified in XPATH-2.0 Specification. Therefore the same XPATH
* expression that works fine in 'single event mode' will always return the first element of
* a batch in 'batch mode'. Therefore to return what the user expects, each child element is
* removed after sending to simulate an iteration for the global lookup.
*/
childIterator.remove();
}
}
}
private void sendEvent(Object obj) {
if (obj instanceof OMElement) {
OMElement eventOMElement = (OMElement) obj;
if (eventBuilderConfiguration.isTraceEnabled()) {
trace.info("[Event-Builder] Received event as OMElement.\n" + eventOMElement.toString());
}
OMNamespace omNamespace = null;
if (this.xPathDefinition == null || this.xPathDefinition.isEmpty()) {
omNamespace = eventOMElement.getNamespace();
}
List<Object> objList = new ArrayList<Object>();
for (XPathData xpathData : attributeXpathList) {
AXIOMXPath xpath = xpathData.getXpath();
OMElement omElementResult = null;
String type = xpathData.getType();
try {
if (omNamespace != null) {
xpath.addNamespaces(eventOMElement);
}
omElementResult = (OMElement) xpath.selectSingleNode(eventOMElement);
Class<?> beanClass = Class.forName(type);
Object returnedObj = null;
if (omElementResult != null) {
returnedObj =
BeanUtil.deserialize(
beanClass, omElementResult, reflectionBasedObjectSupplier, null);
} else if (xpathData.getDefaultValue() != null) {
if (!beanClass.equals(String.class)) {
Class<?> stringClass = String.class;
Method valueOfMethod = beanClass.getMethod("valueOf", stringClass);
returnedObj = valueOfMethod.invoke(null, xpathData.getDefaultValue());
} else {
returnedObj = xpathData.getDefaultValue();
}
log.warn("Unable to parse XPath to retrieve required attribute. Sending defaults.");
} else {
log.warn(
"Unable to parse XPath to retrieve required attribute. Skipping to next attribute.");
}
objList.add(returnedObj);
} catch (JaxenException e) {
throw new EventBuilderConfigurationException("Error parsing xpath for " + xpath, e);
} catch (ClassNotFoundException e) {
throw new EventBuilderConfigurationException(
"Cannot find specified class for type " + type);
} catch (AxisFault axisFault) {
throw new EventBuilderConfigurationException(
"Error deserializing OMElement " + omElementResult, axisFault);
} catch (NoSuchMethodException e) {
throw new EventBuilderConfigurationException(
"Error trying to convert default value to specified target type.", e);
} catch (InvocationTargetException e) {
throw new EventBuilderConfigurationException(
"Error trying to convert default value to specified target type.", e);
} catch (IllegalAccessException e) {
throw new EventBuilderConfigurationException(
"Error trying to convert default value to specified target type.", e);
}
}
Object[] objArray = objList.toArray(new Object[objList.size()]);
if (!this.basicEventListeners.isEmpty()) {
if (eventBuilderConfiguration.isTraceEnabled()) {
trace.info(
"[Event-Builder] Sending event object array "
+ Arrays.toString(objArray)
+ " to all registered basic event listeners");
}
for (BasicEventListener basicEventListener : basicEventListeners) {
basicEventListener.onEvent(objArray);
}
}
if (!this.wso2EventListeners.isEmpty()) {
Event event =
new Event(
exportedStreamDefinition.getStreamId(),
System.currentTimeMillis(),
null,
null,
objArray);
if (eventBuilderConfiguration.isTraceEnabled()) {
trace.info(
"[Event-Builder] Sending event "
+ event.toString()
+ " to all registered wso2 event listeners");
}
for (Wso2EventListener wso2EventListener : wso2EventListeners) {
wso2EventListener.onEvent(event);
}
}
}
}
