Java tutorial
/** * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ package demo.wseventing; import java.io.ByteArrayOutputStream; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.xml.bind.JAXBContext; import javax.xml.bind.JAXBException; import javax.xml.bind.Marshaller; import javax.xml.datatype.DatatypeConfigurationException; import org.apache.commons.lang3.StringEscapeUtils; import org.apache.cxf.jaxws.JaxWsProxyFactoryBean; import org.apache.cxf.ws.addressing.AttributedURIType; import org.apache.cxf.ws.addressing.EndpointReferenceType; import org.apache.cxf.ws.eventing.DeliveryType; import org.apache.cxf.ws.eventing.ExpirationType; import org.apache.cxf.ws.eventing.FilterType; import org.apache.cxf.ws.eventing.ObjectFactory; import org.apache.cxf.ws.eventing.Subscribe; import org.apache.cxf.ws.eventing.SubscribeResponse; import org.apache.cxf.ws.eventing.eventsource.EventSourceEndpoint; @WebServlet(urlPatterns = "/CreateSubscriptionServlet") public class CreateSubscriptionServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { try { resp.getWriter().append("<html><body>"); JaxWsProxyFactoryBean factory = new JaxWsProxyFactoryBean(); factory.setServiceClass(EventSourceEndpoint.class); factory.setAddress("http://localhost:8080/ws_eventing/services/EventSource"); EventSourceEndpoint requestorClient = (EventSourceEndpoint) factory.create(); String expires = null; if (req.getParameter("expires-set") == null) { expires = req.getParameter("expires"); } else { if (!req.getParameter("expires-set").equals("false")) { expires = req.getParameter("expires"); } } Subscribe sub = createSubscribeMessage(req.getParameter("targeturl"), req.getParameter("filter-set") == null ? req.getParameter("filter") : null, expires); resp.getWriter().append("<h3>Subscription request</h3>"); resp.getWriter().append(convertJAXBElementToStringAndEscapeHTML(sub)); SubscribeResponse subscribeResponse = requestorClient.subscribeOp(sub); resp.getWriter().append("<h3>Response from Event Source</h3>"); resp.getWriter().append(convertJAXBElementToStringAndEscapeHTML(subscribeResponse)); resp.getWriter().append("<br/><a href=\"index.jsp\">Back to main page</a>"); resp.getWriter().append("</body></html>"); } catch (Exception e) { throw new ServletException(e); } } public Subscribe createSubscribeMessage(String targetURL, String filter, String expires) throws DatatypeConfigurationException { Subscribe sub = new Subscribe(); // expires if (expires != null) { sub.setExpires(new ExpirationType()); sub.getExpires().setValue(expires); } // delivery EndpointReferenceType eventSink = new EndpointReferenceType(); AttributedURIType eventSinkAddr = new AttributedURIType(); eventSinkAddr.setValue(targetURL); eventSink.setAddress(eventSinkAddr); sub.setDelivery(new DeliveryType()); sub.getDelivery().getContent().add(new ObjectFactory().createNotifyTo(eventSink)); // filter if (filter != null && filter.length() > 0) { sub.setFilter(new FilterType()); sub.getFilter().getContent().add(filter); } return sub; } public String convertJAXBElementToStringAndEscapeHTML(Object o) throws JAXBException { JAXBContext jc = JAXBContext.newInstance(Subscribe.class.getPackage().getName()); Marshaller m = jc.createMarshaller(); ByteArrayOutputStream baos = new ByteArrayOutputStream(); m.marshal(o, baos); String unescaped = baos.toString(); return StringEscapeUtils.escapeHtml4(unescaped); } }