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Axis2 Data Binding module
/*
* 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.
*/
/*
* Reflection based RPCMessageReceiver , request will be processed by looking at the method signature
* of the invocation method
*/
package org.apache.axis2.rpc.receivers;
import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.OMNamespace;
import org.apache.axiom.om.OMAbstractFactory;
import org.apache.axiom.om.impl.builder.StAXOMBuilder;
import org.apache.axiom.soap.SOAPBody;
import org.apache.axiom.soap.SOAPEnvelope;
import org.apache.axiom.soap.SOAPFactory;
import org.apache.axis2.AxisFault;
import org.apache.axis2.util.StreamWrapper;
import org.apache.axis2.databinding.utils.BeanUtil;
import org.apache.axis2.context.MessageContext;
import org.apache.axis2.description.AxisMessage;
import org.apache.axis2.description.AxisOperation;
import org.apache.axis2.description.AxisService;
import org.apache.axis2.description.Parameter;
import org.apache.axis2.description.WSDL2Constants;
import org.apache.axis2.description.java2wsdl.Java2WSDLConstants;
import org.apache.axis2.description.java2wsdl.TypeTable;
import org.apache.axis2.receivers.AbstractInOutMessageReceiver;
import org.apache.axis2.wsdl.WSDLConstants;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamReader;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
public class RPCMessageReceiver extends AbstractInOutMessageReceiver {
private static Log log = LogFactory.getLog(RPCMessageReceiver.class);
/**
* reflect and get the Java method - for each i'th param in the java method - get the first
* child's i'th child -if the elem has an xsi:type attr then find the deserializer for it - if
* not found, lookup deser for th i'th param (java type) - error if not found - deserialize &
* save in an object array - end for
*
* - invoke method and get the return value
*
* - look up serializer for return value based on the value and type
*
* - create response msg and add return value as grand child of
*
* @param inMessage incoming MessageContext
* @param outMessage outgoing MessageContext
* @throws AxisFault
*/
public void invokeBusinessLogic(MessageContext inMessage, MessageContext outMessage)
throws AxisFault {
Method method = null;
try {
// get the implementation class for the Web Service
Object obj = getTheImplementationObject(inMessage);
Class implClass = obj.getClass();
AxisOperation op = inMessage.getOperationContext().getAxisOperation();
method = (Method)(op.getParameterValue("myMethod"));
// If the declaring class has changed, then the cached method is invalid, so we need to
// reload it. This is to fix AXIS2-3947.
if (method != null && method.getDeclaringClass() != implClass) {
method = null;
}
AxisService service = inMessage.getAxisService();
SOAPBody body = inMessage.getEnvelope().getBody();
if(body==null){
throw new AxisFault("SOAP body is missing in the request" );
}
OMElement methodElement = body.getFirstElement();
AxisMessage inAxisMessage = op.getMessage(WSDLConstants.MESSAGE_LABEL_IN_VALUE);
String messageNameSpace = null;
if (method == null) {
String methodName = op.getName().getLocalPart();
Method[] methods = implClass.getMethods();
for (Method method1 : methods) {
if (method1.isBridge()) {
continue;
}
if (method1.getName().equals(methodName)) {
method = method1;
op.addParameter("myMethod", method);
break;
}
}
if (method == null) {
throw new AxisFault("No such method '" + methodName +
"' in class " + implClass.getName());
}
}
Object resObject = null;
if (inAxisMessage != null) {
resObject = RPCUtil.invokeServiceClass(inAxisMessage,
method,
obj,
messageNameSpace,
methodElement,inMessage);
}
SOAPFactory fac = getSOAPFactory(inMessage);
// Handling the response
AxisMessage outaxisMessage = op.getMessage(WSDLConstants.MESSAGE_LABEL_OUT_VALUE);
if (outaxisMessage != null && outaxisMessage.getElementQName() !=null) {
messageNameSpace = outaxisMessage.getElementQName().getNamespaceURI();
} else {
messageNameSpace = service.getTargetNamespace();
}
OMNamespace ns = fac.createOMNamespace(messageNameSpace,
service.getSchemaTargetNamespacePrefix());
SOAPEnvelope envelope = fac.getDefaultEnvelope();
OMElement bodyContent = null;
if (WSDL2Constants.MEP_URI_ROBUST_IN_ONLY.equals(
op.getMessageExchangePattern())){
if (outMessage.getAxisMessage().getName() != null) {
OMElement bodyChild = fac.createOMElement(outMessage.getAxisMessage().getName(), ns);
envelope.getBody().addChild(bodyChild);
}
outMessage.setEnvelope(envelope);
return;
}
Parameter generateBare = service.getParameter(Java2WSDLConstants.DOC_LIT_BARE_PARAMETER);
if (generateBare!=null && "true".equals(generateBare.getValue())) {
RPCUtil.processResonseAsDocLitBare(resObject, service,
method, envelope, fac, ns,
bodyContent, outMessage);
} else {
RPCUtil.processResponseAsDocLitWrapped(resObject, service,
method, envelope, fac, ns,
bodyContent, outMessage);
}
outMessage.setEnvelope(envelope);
} catch (InvocationTargetException e) {
String msg = null;
Throwable cause = e.getCause();
if (cause != null) {
msg = cause.getMessage();
}
if (msg == null) {
msg = "Exception occurred while trying to invoke service method " +
(method != null ? method.getName() : "null");
}
if (cause instanceof AxisFault) {
log.debug(msg, cause);
throw (AxisFault)cause;
}
Class[] exceptionTypes = method.getExceptionTypes();
for (Class exceptionType : exceptionTypes){
if (cause != null && exceptionType.getName().equals(cause.getClass().getName())){
// this is an bussiness logic exception so handle it properly
String partQName = inMessage.getAxisService().getName() + getSimpleClassName(exceptionType);
TypeTable typeTable = inMessage.getAxisService().getTypeTable();
QName elementQName = typeTable.getQNamefortheType(partQName);
SOAPFactory fac = getSOAPFactory(inMessage);
OMElement exceptionElement = fac.createOMElement(elementQName);
if (exceptionType.getName().equals(Exception.class.getName())){
// this is an exception class. so create a element by hand and add the message
OMElement innterExceptionElement = fac.createOMElement(elementQName);
OMElement messageElement = fac.createOMElement("Message", inMessage.getAxisService().getTargetNamespace(), null);
messageElement.setText(cause.getMessage());
innterExceptionElement.addChild(messageElement);
exceptionElement.addChild(innterExceptionElement);
} else {
// if it is a normal bussiness exception we need to generate the schema assuming it is a pojo
// Ignore RuntimeException because no way to map type info.
if (!(cause instanceof RuntimeException)) {
QName innerElementQName = new QName(elementQName.getNamespaceURI(), getSimpleClassName(exceptionType));
XMLStreamReader xr = BeanUtil.getPullParser(cause,
innerElementQName, typeTable, true, false);
StAXOMBuilder stAXOMBuilder = new StAXOMBuilder(OMAbstractFactory.getOMFactory(), new StreamWrapper(xr));
OMElement documentElement = stAXOMBuilder.getDocumentElement();
exceptionElement.addChild(documentElement);
}
}
AxisFault axisFault = new AxisFault(cause.getMessage());
axisFault.setDetail(exceptionElement);
throw axisFault;
}
}
log.error(msg, e);
throw new AxisFault(msg, e);
} catch(RuntimeException e) {
log.error(e.getMessage(), e);
throw AxisFault.makeFault(e);
} catch (Exception e) {
String msg = "Exception occurred while trying to invoke service method " +
(method != null ? method.getName() : "null");
log.error(msg, e);
throw AxisFault.makeFault(e);
}
}
private String getSimpleClassName(Class type) {
String simpleClassName = type.getName();
int idx = simpleClassName.lastIndexOf('.');
if (idx != -1 && idx < (simpleClassName.length() - 1)) {
simpleClassName = simpleClassName.substring(idx + 1);
}
return simpleClassName.replace('$', '_');
}
}