Source Code Cross Referenced for GenericSoapClient.java in  » Workflow-Engines » wfmopen-2.1.1 » de » danet » an » workflow » tools » soap » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Workflow Engines » wfmopen 2.1.1 » de.danet.an.workflow.tools.soap 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * This file is part of the WfMOpen project.
003:         * Copyright (C) 2001-2004 Danet GmbH (www.danet.de), GS-AN.
004:         * All rights reserved.
005:         *
006:         * This program is free software; you can redistribute it and/or modify
007:         * it under the terms of the GNU General Public License as published by
008:         * the Free Software Foundation; either version 2 of the License, or
009:         * (at your option) any later version.
010:         *
011:         * This program is distributed in the hope that it will be useful,
012:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
013:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
014:         * GNU General Public License for more details.
015:         *
016:         * You should have received a copy of the GNU General Public License
017:         * along with this program; if not, write to the Free Software
018:         * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
019:         *
020:         * $Id: GenericSoapClient.java,v 1.8 2007/01/30 11:56:15 drmlipp Exp $
021:         *
022:         * $Log: GenericSoapClient.java,v $
023:         * Revision 1.8  2007/01/30 11:56:15  drmlipp
024:         * Merged Wf-XML branch.
025:         *
026:         * Revision 1.7.4.1  2006/12/20 14:37:59  schnelle
027:         * Implemented Factory GetDefinition.
028:         *
029:         * Revision 1.7  2006/10/17 08:43:42  drmlipp
030:         * Added support for JBoss connection exception detection.
031:         *
032:         * Revision 1.6  2006/09/29 12:32:09  drmlipp
033:         * Consistently using WfMOpen as projct name now.
034:         *
035:         * Revision 1.5  2005/09/05 14:03:44  drmlipp
036:         * Adapted to ToolAgent API update.
037:         *
038:         * Revision 1.4  2005/08/29 14:22:32  drmlipp
039:         * Added ConnectException handling for generic soap client.
040:         *
041:         * Revision 1.3  2005/08/04 07:02:37  drmlipp
042:         * Rmoved not needed code.
043:         *
044:         * Revision 1.2  2005/08/03 15:35:35  drmlipp
045:         * Back-ported generic SOAP tool from wfmopen-2 branch.
046:         *
047:         */
048:        package de.danet.an.workflow.tools.soap;
049:
050:        import java.io.Serializable;
051:        import java.net.MalformedURLException;
052:        import java.net.URL;
053:        import java.rmi.ConnectException;
054:        import java.rmi.RemoteException;
055:        import java.util.HashMap;
056:        import java.util.Iterator;
057:        import java.util.List;
058:        import java.util.Map;
059:
060:        import javax.xml.soap.MessageFactory;
061:        import javax.xml.soap.SOAPBody;
062:        import javax.xml.soap.SOAPConnection;
063:        import javax.xml.soap.SOAPConnectionFactory;
064:        import javax.xml.soap.SOAPElement;
065:        import javax.xml.soap.SOAPEnvelope;
066:        import javax.xml.soap.SOAPException;
067:        import javax.xml.soap.SOAPHeader;
068:        import javax.xml.soap.SOAPMessage;
069:        import javax.xml.soap.SOAPPart;
070:        import javax.xml.transform.Transformer;
071:        import javax.xml.transform.TransformerException;
072:        import javax.xml.transform.TransformerFactory;
073:        import javax.xml.transform.dom.DOMSource;
074:        import javax.xml.transform.sax.SAXResult;
075:
076:        import org.jaxen.JaxenException;
077:        import org.jaxen.XPath;
078:        import org.jaxen.dom.DOMXPath;
079:        import org.w3c.dom.Document;
080:        import org.w3c.dom.DocumentFragment;
081:        import org.w3c.dom.Element;
082:        import org.w3c.dom.Node;
083:        import org.w3c.dom.NodeList;
084:        import org.xml.sax.SAXException;
085:
086:        import de.danet.an.util.sax.HandlerStack;
087:        import de.danet.an.util.soap.SOAPBuilder;
088:        import de.danet.an.util.web.W3CDomUtil;
089:        import de.danet.an.workflow.api.Activity;
090:        import de.danet.an.workflow.api.FormalParameter;
091:        import de.danet.an.workflow.api.SAXEventBuffer;
092:        import de.danet.an.workflow.spis.aii.ApplicationNotStoppedException;
093:        import de.danet.an.workflow.spis.aii.CannotExecuteException;
094:        import de.danet.an.workflow.spis.aii.ResultProvider;
095:        import de.danet.an.workflow.spis.aii.ToolAgent;
096:        import de.danet.an.workflow.spis.aii.XMLArgumentTypeProvider;
097:        import de.danet.an.workflow.util.SAXEventBufferImpl;
098:        import de.danet.an.workflow.util.XPDLUtil;
099:
100:        /**
101:         * This class provides a generic SOAP client.
102:         *
103:         * @author <a href="mailto:lipp@danet.de">Michael Lipp</a>
104:         * @version $Revision: 1.8 $
105:         */
106:
107:        public class GenericSoapClient implements  ToolAgent,
108:                XMLArgumentTypeProvider, ResultProvider, Serializable {
109:
110:            private static final org.apache.commons.logging.Log logger = org.apache.commons.logging.LogFactory
111:                    .getLog(GenericSoapClient.class);
112:
113:            // hold the mapping of return parameter name and eventually the XPath 
114:            // expression
115:            private Map returnParamInfo = new HashMap();
116:
117:            private String endpoint;
118:
119:            /** The result container. */
120:            private ThreadLocal result = new ThreadLocal();
121:
122:            /**
123:             * Creates an instance of <code>GenericSoapClient</code>
124:             * with all attributes initialized to default values.
125:             */
126:            public GenericSoapClient() {
127:            }
128:
129:            /**
130:             * Get the value of endpoint.
131:             * @return value of endpoint.
132:             * @see #setEndpoint
133:             */
134:            public String getEndpoint() {
135:                return endpoint;
136:            }
137:
138:            /**
139:             * Set the value of endpoint.
140:             * @param newEndpoint value to assign to endpoint.
141:             * @see #getEndpoint
142:             */
143:            public void setEndpoint(String newEndpoint) {
144:                this .endpoint = newEndpoint;
145:            }
146:
147:            /** 
148:             * Set the xml definition of output mappings. It is used to convert the 
149:             * WSIF invocation response.
150:             *
151:             * @param outputMappings the given xml as W3C Element.
152:             */
153:            public void setMappings(Element outputMappings) {
154:                try {
155:                    // retrieve namespaces
156:                    NodeList namespacesNodeList = outputMappings
157:                            .getElementsByTagNameNS(XPDLUtil.XPDL_EXTN_NS,
158:                                    "Namespaces");
159:                    NodeList nsNodeList = null;
160:                    if (namespacesNodeList.getLength() > 0) {
161:                        Element namespacesNode = (Element) namespacesNodeList
162:                                .item(0);
163:                        nsNodeList = namespacesNode.getElementsByTagNameNS(
164:                                XPDLUtil.XPDL_EXTN_NS, "Namespace");
165:                    }
166:                    NodeList paramNodeList = outputMappings
167:                            .getElementsByTagNameNS(XPDLUtil.XPDL_EXTN_NS,
168:                                    "Parameter");
169:                    for (int i = 0; i < paramNodeList.getLength(); i++) {
170:                        Element param = (Element) paramNodeList.item(i);
171:                        String name = param.getAttribute("Name");
172:                        XPath xpath = new DOMXPath(param.getAttribute("Select"));
173:                        if (nsNodeList != null) {
174:                            for (int j = 0; j < nsNodeList.getLength(); j++) {
175:                                Element ns = (Element) nsNodeList.item(j);
176:                                String prefix = ns.getAttribute("Prefix");
177:                                String uri = ns.getAttribute("Uri");
178:                                xpath.addNamespace(prefix, uri);
179:                            }
180:                        }
181:                        returnParamInfo.put(name, xpath);
182:                    }
183:                } catch (Exception e) {
184:                    // if any error ocurred, outputMappings is still null.
185:                    logger
186:                            .error("error in setting XML for output mappings!",
187:                                    e);
188:                }
189:            }
190:
191:            // Implementation of de.danet.an.workflow.spis.aii.ToolAgent
192:
193:            /* Comment copied from interface. */
194:            public void invoke(Activity activity, FormalParameter[] formPars,
195:                    Map map) throws RemoteException, CannotExecuteException {
196:                try {
197:                    SAXEventBuffer headerContent = (SAXEventBuffer) map
198:                            .get("header");
199:                    SAXEventBuffer bodyContent = (SAXEventBuffer) map
200:                            .get("body");
201:
202:                    SOAPConnectionFactory factory = SOAPConnectionFactory
203:                            .newInstance();
204:                    SOAPConnection connection = factory.createConnection();
205:
206:                    MessageFactory messageFactory = MessageFactory
207:                            .newInstance();
208:                    SOAPMessage message = messageFactory.createMessage();
209:                    SOAPEnvelope env = message.getSOAPPart().getEnvelope();
210:
211:                    if (headerContent != null) {
212:                        SOAPHeader hdr = env.getHeader();
213:                        appendNodes(env, hdr, headerContent);
214:                    }
215:
216:                    SOAPBody body = env.getBody();
217:                    appendNodes(env, body, bodyContent);
218:
219:                    SOAPMessage response = null;
220:                    try {
221:                        response = connection.call(message, new URL(endpoint));
222:                    } catch (SOAPException e) {
223:                        if (e.getMessage().indexOf("ConnectException") >= 0) {
224:                            // Axis way of reporting this
225:                            if (logger.isDebugEnabled()) {
226:                                logger.debug(
227:                                        "Cannot invoke (signalled ConnectException): "
228:                                                + e.getMessage(), e);
229:                            }
230:                            throw new CannotExecuteException(
231:                                    "Assuming connection failure: "
232:                                            + e.getMessage(),
233:                                    new ConnectException(e.getMessage(), e));
234:                        } else if (e.getCause() != null
235:                                && e.getCause().getCause() != null
236:                                && (e.getCause().getCause() instanceof  java.net.ConnectException)) {
237:                            // JBossWS way of reporting this
238:                            throw new CannotExecuteException(
239:                                    "Assuming connection failure: "
240:                                            + e.getMessage(),
241:                                    new ConnectException(e.getMessage(), e));
242:                        }
243:                        throw e;
244:                    } finally {
245:                        connection.close();
246:                    }
247:                    SOAPPart respPart = response.getSOAPPart();
248:
249:                    Map resData = new HashMap();
250:                    for (int i = 0; i < formPars.length; i++) {
251:                        if (formPars[i].mode() == FormalParameter.Mode.IN) {
252:                            continue;
253:                        }
254:                        XPath path = (XPath) returnParamInfo.get(formPars[i]
255:                                .id());
256:                        if (path == null) {
257:                            resData.put(formPars[i].id(), convertToSax(respPart
258:                                    .getDocumentElement()));
259:                        } else {
260:                            if (formPars[i].type().equals(String.class)) {
261:                                resData.put(formPars[i].id(), path
262:                                        .stringValueOf(respPart));
263:                            } else if ((formPars[i].type() instanceof  Class)
264:                                    && Number.class
265:                                            .isAssignableFrom((Class) formPars[i]
266:                                                    .type())) {
267:                                Number n = path.numberValueOf(respPart);
268:                                if (formPars[i].type().equals(Long.class)
269:                                        && !(n instanceof  Long)) {
270:                                    n = new Long(n.longValue());
271:                                }
272:                                resData.put(formPars[i].id(), n);
273:                            } else {
274:                                resData.put(formPars[i].id(), convertToSax(path
275:                                        .selectNodes(respPart)));
276:                            }
277:                        }
278:                    }
279:                    result.set(resData);
280:                } catch (CannotExecuteException e) {
281:                    throw e;
282:                } catch (MalformedURLException e) {
283:                    throw new CannotExecuteException(e.getMessage(), e);
284:                } catch (SOAPException e) {
285:                    throw new CannotExecuteException(e.getMessage(), e);
286:                } catch (SAXException e) {
287:                    throw new CannotExecuteException(e.getMessage(), e);
288:                } catch (JaxenException e) {
289:                    throw new CannotExecuteException(e.getMessage(), e);
290:                } catch (TransformerException e) {
291:                    throw new CannotExecuteException(e.getMessage(), e);
292:                }
293:            }
294:
295:            private SAXEventBuffer convertToSax(Node value)
296:                    throws TransformerException {
297:                TransformerFactory tf = TransformerFactory.newInstance();
298:                Transformer t = tf.newTransformer();
299:                SAXEventBufferImpl res = new SAXEventBufferImpl();
300:                t.transform(new DOMSource(value), new SAXResult(res));
301:                return res;
302:            }
303:
304:            private SAXEventBuffer convertToSax(List nodes)
305:                    throws TransformerException {
306:                Document doc = W3CDomUtil.createNewDocument();
307:                DocumentFragment frag = doc.createDocumentFragment();
308:                for (Iterator i = nodes.iterator(); i.hasNext();) {
309:                    Element e = (Element) i.next();
310:                    frag.appendChild(doc.importNode(e, true));
311:                }
312:                return convertToSax(frag);
313:            }
314:
315:            private void appendNodes(SOAPEnvelope env, SOAPElement root,
316:                    SAXEventBuffer data) throws SAXException {
317:                HandlerStack hs = new HandlerStack(new SOAPBuilder(root));
318:                hs.setContextData("envelope", env);
319:                data.emit(hs.contentHandler());
320:            }
321:
322:            /**
323:             * Return the requested type for XML arguments.
324:             * @return one of <code>XML_AS_W3C_DOM</code>,
325:             * <code>XML_AS_JDOM</code> or <code>XML_AS_SAX</code>
326:             */
327:            public int requestedXMLArgumentType() {
328:                return XMLArgumentTypeProvider.XML_AS_SAX;
329:            }
330:
331:            /**
332:             * Return the result evaluated during {@link ToolAgent#invoke
333:             * <code>invoke</code>}. The method will only be called once after
334:             * each invoke, i.e. the attribute holding the result be be
335:             * cleared in this method.
336:             *
337:             * @return the result data or <code>null</code> if the invocation
338:             * does not return any data.
339:             */
340:            public Object result() {
341:                Object res = result.get();
342:                result.set(null);
343:                return res;
344:            }
345:
346:            /* Comment copied from interface. */
347:            public void terminate(Activity activity)
348:                    throws ApplicationNotStoppedException {
349:                throw new ApplicationNotStoppedException(
350:                        "Terminate not implemented for GenericSoapClient.");
351:            }
352:        }
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