关于使用Axis2 webservice 处理Fault响应时抛org.apache.axis2.AxisFault的分析

使用Axis2这个框架进行webservice协议通讯，期间出了个问题，我（CLIENT）请求后，当服务端返回符合协议的SOAP异常报文，例如<soap:fault> ...

我的程序直接抛org.apache.axis2.AxisFault异常，导致连服务端给我们的报文都没有接收成功。

--请注意，是我连报文都没有接收成功，而不是接收成功后我解析失败了。

try {
ServiceClient serviceClient = new ServiceClient();
Options options = new Options();
//设置超时时间，单位毫秒
options.setTimeOutInMilliSeconds(this.wsTimeOut);
options.setTransportInProtocol(Constants.TRANSPORT_HTTP);
options.setTo(new EndpointReference(this.wsEndpointAddress));
options.setSoapVersionURI(org.apache.axiom.soap.SOAP12Constants.SOAP_ENVELOPE_NAMESPACE_URI);
options.setAction(this.wsMethod);
MessageContext requetMessageContext = new MessageContext();
SOAPEnvelope env = this.getRequestEnvelope();
log.info("version : "+ env.getVersion().getEnvelopeURI());
requetMessageContext.setEnvelope(env);
OperationClient opClient = serviceClient.createClient(ServiceClient.ANON_OUT_IN_OP);
opClient.addMessageContext(requetMessageContext);
opClient.setOptions(options);
opClient.execute(true);
MessageContext rspMC = opClient.getMessageContext("In");
response = rspMC.getEnvelope().getBody().getFirstElement();
log.info("应答报文: "+ rspMC.getEnvelope());
} catch (AxisFault e) {
this.errRspDesc = "xxxxx";
log.error("soapDispatch AxisFault!");
throw e;
} catch (Exception e) {
this.errRspDesc = "xxxxxxxxxxxxx！";
log.error("soapDispatch Exception!");
throw e;
}

try {

         ServiceClient serviceClient = new ServiceClient();

         Options options = new Options();

         //设置超时时间，单位毫秒

         options.setTimeOutInMilliSeconds(this.wsTimeOut);

           options.setTransportInProtocol(Constants.TRANSPORT_HTTP);

           options.setTo(new EndpointReference(this.wsEndpointAddress));

           options.setSoapVersionURI(org.apache.axiom.soap.SOAP12Constants.SOAP_ENVELOPE_NAMESPACE_URI);

           options.setAction(this.wsMethod);

           MessageContext requetMessageContext = new MessageContext();

           SOAPEnvelope env = this.getRequestEnvelope();

           log.info("version : "+ env.getVersion().getEnvelopeURI());

            requetMessageContext.setEnvelope(env);

            OperationClient opClient = serviceClient.createClient(ServiceClient.ANON_OUT_IN_OP);

            opClient.addMessageContext(requetMessageContext);

            opClient.setOptions(options);

            opClient.execute(true);

            MessageContext rspMC = opClient.getMessageContext("In");

            response = rspMC.getEnvelope().getBody().getFirstElement();

         log.info("应答报文: "+ rspMC.getEnvelope());

      } catch (AxisFault e) {

         this.errRspDesc = "xxxxx";

         log.error("soapDispatch AxisFault!");

         throw e;

      } catch (Exception e) {

         this.errRspDesc = "xxxxxxxxxxxxx！";

         log.error("soapDispatch Exception!");

         throw e;

      }

当执行到发送请求opClient.execute(true);

服务端成功返回格式正常的SOAP异常报文，此时程序直接抛异常，走不到下面rspMC的获取，也就拿不到响应报文。

经过一段时间的查看Axis2源码，终于找到原因。

从opClient.execute(true); 入手，可以看到

public final void execute(boolean block) throws AxisFault {
this.sc.setLastOperationContext(this.oc);
this.executeImpl(block);
}

 public final void execute(boolean block) throws AxisFault {

        this.sc.setLastOperationContext(this.oc);

        this.executeImpl(block);

    }

再看this.executeImpl(block);

public void executeImpl(boolean block) throws AxisFault {
if(log.isDebugEnabled()) {
log.debug("Entry: OutInAxisOperationClient::execute, " + block);
}
if(this.completed) {
throw new AxisFault(Messages.getMessage("mepiscomplted"));
} else {
ConfigurationContext cc = this.sc.getConfigurationContext();
MessageContext mc = this.oc.getMessageContext("Out");
if(mc == null) {
throw new AxisFault(Messages.getMessage("outmsgctxnull"));
} else {
this.prepareMessageContext(cc, mc);
if(this.options.getTransportIn() == null && mc.getTransportIn() == null) {
mc.setTransportIn(ClientUtils.inferInTransport(cc.getAxisConfiguration(), this.options, mc));
} else if(mc.getTransportIn() == null) {
mc.setTransportIn(this.options.getTransportIn());
}
boolean useAsync = false;
if(!mc.getOptions().isUseSeparateListener()) {
Boolean replyTo = (Boolean)mc.getProperty("UseAsyncOperations");
if(log.isDebugEnabled()) {
log.debug("OutInAxisOperationClient: useAsyncOption " + replyTo);
}
if(replyTo != null) {
useAsync = replyTo.booleanValue();
}
}
EndpointReference replyTo1 = mc.getReplyTo();
if(replyTo1 != null) {
if(replyTo1.hasNoneAddress()) {
throw new AxisFault(replyTo1.getAddress() + "" + " can not be used with OutInAxisOperationClient , user either " + "fireAndForget or sendRobust)");
}
if(replyTo1.isWSAddressingAnonymous() && replyTo1.getAllReferenceParameters() != null) {
mc.setProperty("includeOptionalHeaders", Boolean.TRUE);
}
String customReplyTo = (String)this.options.getProperty(Options.CUSTOM_REPLYTO_ADDRESS);
if(!Options.CUSTOM_REPLYTO_ADDRESS_TRUE.equals(customReplyTo) && !replyTo1.hasAnonymousAddress()) {
useAsync = true;
}
}
if(!useAsync && !mc.getOptions().isUseSeparateListener()) {
if(block) {
this.send(mc);
this.completed = true;
} else {
this.sc.getConfigurationContext().getThreadPool().execute(new OutInAxisOperationClient.NonBlockingInvocationWorker(this.callback, mc, this.axisCallback));
}
} else {
this.sendAsync(useAsync, mc);
}
}
}
}

 public void executeImpl(boolean block) throws AxisFault {

        if(log.isDebugEnabled()) {

            log.debug("Entry: OutInAxisOperationClient::execute, " + block);

        }

        if(this.completed) {

            throw new AxisFault(Messages.getMessage("mepiscomplted"));

        } else {

            ConfigurationContext cc = this.sc.getConfigurationContext();

            MessageContext mc = this.oc.getMessageContext("Out");

            if(mc == null) {

                throw new AxisFault(Messages.getMessage("outmsgctxnull"));

            } else {

                this.prepareMessageContext(cc, mc);

                if(this.options.getTransportIn() == null && mc.getTransportIn() == null) {

                    mc.setTransportIn(ClientUtils.inferInTransport(cc.getAxisConfiguration(), this.options, mc));

                } else if(mc.getTransportIn() == null) {

                    mc.setTransportIn(this.options.getTransportIn());

                }

                boolean useAsync = false;

                if(!mc.getOptions().isUseSeparateListener()) {

                    Boolean replyTo = (Boolean)mc.getProperty("UseAsyncOperations");

                    if(log.isDebugEnabled()) {

                        log.debug("OutInAxisOperationClient: useAsyncOption " + replyTo);

                    }

                    if(replyTo != null) {

                        useAsync = replyTo.booleanValue();

                    }

                }

                EndpointReference replyTo1 = mc.getReplyTo();

                if(replyTo1 != null) {

                    if(replyTo1.hasNoneAddress()) {

                        throw new AxisFault(replyTo1.getAddress() + "" + " can not be used with OutInAxisOperationClient , user either " + "fireAndForget or sendRobust)");

                    }

                    if(replyTo1.isWSAddressingAnonymous() && replyTo1.getAllReferenceParameters() != null) {

                        mc.setProperty("includeOptionalHeaders", Boolean.TRUE);

                    }

                    String customReplyTo = (String)this.options.getProperty(Options.CUSTOM_REPLYTO_ADDRESS);

                    if(!Options.CUSTOM_REPLYTO_ADDRESS_TRUE.equals(customReplyTo) && !replyTo1.hasAnonymousAddress()) {

                        useAsync = true;

                    }

                }

                if(!useAsync && !mc.getOptions().isUseSeparateListener()) {

                    if(block) {

                        this.send(mc);

                        this.completed = true;

                    } else {

                        this.sc.getConfigurationContext().getThreadPool().execute(new OutInAxisOperationClient.NonBlockingInvocationWorker(this.callback, mc, this.axisCallback));

                    }

                } else {

                    this.sendAsync(useAsync, mc);

                }

            }

        }

    }

进send(mc)方法

protected MessageContext send(MessageContext msgContext) throws AxisFault {
MessageContext responseMessageContext = msgContext.getConfigurationContext().createMessageContext();
responseMessageContext.setServerSide(false);
responseMessageContext.setOperationContext(msgContext.getOperationContext());
responseMessageContext.setOptions(new Options(this.options));
responseMessageContext.setMessageID(msgContext.getMessageID());
this.addMessageContext(responseMessageContext);
responseMessageContext.setServiceContext(msgContext.getServiceContext());
responseMessageContext.setAxisMessage(this.axisOp.getMessage("In"));
AxisEngine.send(msgContext);
responseMessageContext.setDoingREST(msgContext.isDoingREST());
responseMessageContext.setProperty("TRANSPORT_HEADERS", msgContext.getProperty("TRANSPORT_HEADERS"));
responseMessageContext.setProperty(HTTPConstants.MC_HTTP_STATUS_CODE, msgContext.getProperty(HTTPConstants.MC_HTTP_STATUS_CODE));
responseMessageContext.setProperty("TRANSPORT_IN", msgContext.getProperty("TRANSPORT_IN"));
responseMessageContext.setTransportIn(msgContext.getTransportIn());
responseMessageContext.setTransportOut(msgContext.getTransportOut());
this.handleResponse(responseMessageContext);
return responseMessageContext;
}

 protected MessageContext send(MessageContext msgContext) throws AxisFault {

        MessageContext responseMessageContext = msgContext.getConfigurationContext().createMessageContext();

        responseMessageContext.setServerSide(false);

        responseMessageContext.setOperationContext(msgContext.getOperationContext());

        responseMessageContext.setOptions(new Options(this.options));

        responseMessageContext.setMessageID(msgContext.getMessageID());

        this.addMessageContext(responseMessageContext);

        responseMessageContext.setServiceContext(msgContext.getServiceContext());

        responseMessageContext.setAxisMessage(this.axisOp.getMessage("In"));

        AxisEngine.send(msgContext);

        responseMessageContext.setDoingREST(msgContext.isDoingREST());

        responseMessageContext.setProperty("TRANSPORT_HEADERS", msgContext.getProperty("TRANSPORT_HEADERS"));

        responseMessageContext.setProperty(HTTPConstants.MC_HTTP_STATUS_CODE, msgContext.getProperty(HTTPConstants.MC_HTTP_STATUS_CODE));

        responseMessageContext.setProperty("TRANSPORT_IN", msgContext.getProperty("TRANSPORT_IN"));

        responseMessageContext.setTransportIn(msgContext.getTransportIn());

        responseMessageContext.setTransportOut(msgContext.getTransportOut());

        this.handleResponse(responseMessageContext);

        return responseMessageContext;

    }

这里就是发送请求并接收响应的地方再看倒数第二行this.handleResponse(responseMessageContext);

protected void handleResponse(MessageContext responseMessageContext) throws AxisFault {
responseMessageContext.setSoapAction((String)null);
SOAPEnvelope resenvelope;
if(responseMessageContext.getEnvelope() == null) {
resenvelope = TransportUtils.createSOAPMessage(responseMessageContext);
if(resenvelope == null) {
throw new AxisFault(Messages.getMessage("blockingInvocationExpectsResponse"));
}
responseMessageContext.setEnvelope(resenvelope);
}
resenvelope = responseMessageContext.getEnvelope();
if(resenvelope != null) {
AxisEngine.receive(responseMessageContext);
if(responseMessageContext.getReplyTo() != null) {
this.sc.setTargetEPR(responseMessageContext.getReplyTo());
}
resenvelope = responseMessageContext.getEnvelope();
if((resenvelope.hasFault() || responseMessageContext.isProcessingFault()) && this.options.isExceptionToBeThrownOnSOAPFault()) {
throw Utils.getInboundFaultFromMessageContext(responseMessageContext);
}
}
}

   protected void handleResponse(MessageContext responseMessageContext) throws AxisFault {

        responseMessageContext.setSoapAction((String)null);

        SOAPEnvelope resenvelope;

        if(responseMessageContext.getEnvelope() == null) {

            resenvelope = TransportUtils.createSOAPMessage(responseMessageContext);

            if(resenvelope == null) {

                throw new AxisFault(Messages.getMessage("blockingInvocationExpectsResponse"));

            }

            responseMessageContext.setEnvelope(resenvelope);

        }

        resenvelope = responseMessageContext.getEnvelope();

        if(resenvelope != null) {

            AxisEngine.receive(responseMessageContext);

            if(responseMessageContext.getReplyTo() != null) {

                this.sc.setTargetEPR(responseMessageContext.getReplyTo());

            }

            resenvelope = responseMessageContext.getEnvelope();

            if((resenvelope.hasFault() || responseMessageContext.isProcessingFault()) && this.options.isExceptionToBeThrownOnSOAPFault()) {

                throw Utils.getInboundFaultFromMessageContext(responseMessageContext);

            }

        }

    }

这时，我们可以看到一个很有趣的方法， if((resenvelope.hasFault() || responseMessageContext.isProcessingFault()) 总算是跟我们的异常报文有关了。跟进去看一下

public boolean hasFault() {
QName payloadQName = this.getPayloadQName_Optimized();
if(payloadQName != null && "Fault".equals(payloadQName.getLocalPart())) {
String body1 = payloadQName.getNamespaceURI();
return "http://schemas.xmlsoap.org/soap/envelope/".equals(body1) || "http://www.w3.org/2003/05/soap-envelope".equals(body1);
} else {
SOAPBody body = this.getBody();
return body == null?false:body.hasFault();
}
}

  public boolean hasFault() {

        QName payloadQName = this.getPayloadQName_Optimized();

        if(payloadQName != null && "Fault".equals(payloadQName.getLocalPart())) {

            String body1 = payloadQName.getNamespaceURI();

            return "http://schemas.xmlsoap.org/soap/envelope/".equals(body1) || "http://www.w3.org/2003/05/soap-envelope".equals(body1);

        } else {

            SOAPBody body = this.getBody();

            return body == null?false:body.hasFault();

        }

    }

可以看到Axis2的内部处理机制，就是一但发现响应报文有Fault节点，它就要抛异常。总算找到源头了那要如何解决这个问题我们可以看到 if((resenvelope.hasFault() || responseMessageContext.isProcessingFault()) && this.options.isExceptionToBeThrownOnSOAPFault()) { throw Utils.getInboundFaultFromMessageContext(responseMessageContext); } 这里还有一个判断条件， this.options.isExceptionToBeThrownOnSOAPFault() 当它为TRUE时才抛异常。这就是options的一个参数，可配置，所以给我们的代码加上

options.setExceptionToBeThrownOnSOAPFault(false);

options.setExceptionToBeThrownOnSOAPFault(false);

就不抛异常了，能够正常获取并解析响应报文。总结：一切的害怕源于对代码的神秘，未知，当你把它当成自己写的代码，去反编译，去阅读，那就不会再害怕！

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关于使用Axis2 webservice 处理Fault响应时抛org.apache.axis2.AxisFault的分析

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