/**************************************************************************************
* Copyright (C) 2008 EsperTech, Inc. All rights reserved. *
* http://esper.codehaus.org *
* http://www.espertech.com *
* ---------------------------------------------------------------------------------- *
* The software in this package is published under the terms of the GPL license *
* a copy of which has been included with this distribution in the license.txt file. *
**************************************************************************************/
package com.espertech.esper.event;
import com.espertech.esper.client.EPException;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.client.EventSender;
import com.espertech.esper.core.EPRuntimeEventSender;
import com.espertech.esper.core.thread.InboundUnitSendWrapped;
import com.espertech.esper.core.thread.ThreadingOption;
import com.espertech.esper.core.thread.ThreadingService;
import com.espertech.esper.event.xml.BaseXMLEventType;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
/**
* Event sender for XML DOM-backed events.
* <p>
* Allows sending only event objects of type Node or Document, does check the root name of the XML document
* which must match the event type root name as configured. Any other event object generates an error.
*/
public class EventSenderXMLDOM implements EventSender
{
private final EPRuntimeEventSender runtimeEventSender;
private final BaseXMLEventType baseXMLEventType;
private final boolean validateRootElement;
private final EventAdapterService eventAdapterService;
private final ThreadingService threadingService;
/**
* Ctor.
* @param runtimeEventSender for processing events
* @param baseXMLEventType the event type
* @param threadingService for inbound threading
* @param eventAdapterService for event bean creation
*/
public EventSenderXMLDOM(EPRuntimeEventSender runtimeEventSender, BaseXMLEventType baseXMLEventType, EventAdapterService eventAdapterService, ThreadingService threadingService)
{
this.runtimeEventSender = runtimeEventSender;
this.baseXMLEventType = baseXMLEventType;
this.validateRootElement = baseXMLEventType.getConfigurationEventTypeXMLDOM().isEventSenderValidatesRoot();
this.eventAdapterService = eventAdapterService;
this.threadingService = threadingService;
}
public void sendEvent(Object node) throws EPException
{
sendEvent(node, false);
}
public void route(Object node) throws EPException
{
sendEvent(node, true);
}
private void sendEvent(Object node, boolean isRoute) throws EPException
{
Node namedNode;
if (node instanceof Document)
{
namedNode = ((Document) node).getDocumentElement();
}
else if (node instanceof Element)
{
namedNode = (Element) node;
}
else
{
throw new EPException("Unexpected event object type '" + node.getClass().getName() + "' encountered, please supply a org.w3c.dom.Document or Element node");
}
if (validateRootElement)
{
String getNodeName = namedNode.getLocalName();
if (getNodeName == null)
{
getNodeName = namedNode.getNodeName();
}
if (!getNodeName.equals(baseXMLEventType.getRootElementName()))
{
throw new EPException("Unexpected root element name '" + getNodeName + "' encountered, expected a root element name of '" + baseXMLEventType.getRootElementName() + "'");
}
}
EventBean event = eventAdapterService.adapterForTypedDOM(namedNode, baseXMLEventType);
if (isRoute)
{
runtimeEventSender.routeEventBean(event);
}
else
{
if ((ThreadingOption.isThreadingEnabled) && (threadingService.isInboundThreading()))
{
threadingService.submitInbound(new InboundUnitSendWrapped(event, runtimeEventSender));
}
else
{
runtimeEventSender.processWrappedEvent(event);
}
}
}
}