I am trying to setup a Spring Integration based Restful service. I am trying to avoid creating individual objects for request and response but instead use a HashMap for simple functions such as isUserAvailableForRegistration at service.
e.g
HashMap<String, String> isUserAvailableForRegistration(HashMap<String,String> request)
The following is the integration related context information:
<bean class="org.springframework.integration.http.inbound.UriPathHandlerMapping"/>
<int-http:inbound-gateway id="inboundGateway"
request-channel="incoming" reply-channel="outgoing"
supported-methods="POST" reply-timeout="5000"
path="/customer/isUserAvailable" />
<int:channel id="incoming" />
<int:channel id="outgoing" />
<int:service-activator id="activator" input-channel="incoming" ref="customerManagementGateway"
method="isUserAvailableForRegistration" output-channel="outgoing" requires-reply="true" />
<int:object-to-json-transformer id="outgoingJsonConverter"
input-channel="outgoing" />
<int:json-to-object-transformer id="incomingJsonConverter" input-channel="incoming" type="java.util.HashMap" />
While I can successfully test that I could marshall HashMap to JSON successfully, I am missing the configuration to unmarshall JSON data into HashMap.
I get the following exception:
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.integration.dispatcher.AggregateMessageDeliveryException: All attempts to deliver Message to MessageHandlers failed. Multiple causes:
failed to transform message
org.springframework.expression.AccessException: Problem invoking method: public java.util.Map com.testapp.customer.CustomerManagementServiceActivator.isUserAvailableForRegistration(java.util.Map)
See below for the stacktrace of the first cause.
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:894)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)
javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
root cause
org.springframework.integration.dispatcher.AggregateMessageDeliveryException: All attempts to deliver Message to MessageHandlers failed. Multiple causes:
failed to transform message
org.springframework.expression.AccessException: Problem invoking method: public java.util.Map com.testapp.customer.CustomerManagementServiceActivator.isUserAvailableForRegistration(java.util.Map)
See below for the stacktrace of the first cause.
org.springframework.integration.dispatcher.UnicastingDispatcher.handleExceptions(UnicastingDispatcher.java:164)
org.springframework.integration.dispatcher.UnicastingDispatcher.doDispatch(UnicastingDispatcher.java:127)
org.springframework.integration.dispatcher.UnicastingDispatcher.dispatch(UnicastingDispatcher.java:101)
org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:61)
org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:157)
org.springframework.integration.core.MessagingTemplate.doSend(MessagingTemplate.java:288)
org.springframework.integration.core.MessagingTemplate.doSendAndReceive(MessagingTemplate.java:318)
org.springframework.integration.core.MessagingTemplate.sendAndReceive(MessagingTemplate.java:239)
org.springframework.integration.gateway.MessagingGatewaySupport.doSendAndReceive(MessagingGatewaySupport.java:233)
org.springframework.integration.gateway.MessagingGatewaySupport.sendAndReceiveMessage(MessagingGatewaySupport.java:207)
org.springframework.integration.http.inbound.HttpRequestHandlingEndpointSupport.doHandleRequest(HttpRequestHandlingEndpointSupport.java:378)
org.springframework.integration.http.inbound.HttpRequestHandlingMessagingGateway.handleRequest(HttpRequestHandlingMessagingGateway.java:95)
org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter.handle(HttpRequestHandlerAdapter.java:49)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:900)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:827)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)
javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
root cause
org.springframework.integration.transformer.MessageTransformationException: failed to transform message
org.springframework.integration.transformer.AbstractTransformer.transform(AbstractTransformer.java:44)
org.springframework.integration.transformer.MessageTransformingHandler.handleRequestMessage(MessageTransformingHandler.java:67)
org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:97)
org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:73)
org.springframework.integration.dispatcher.UnicastingDispatcher.doDispatch(UnicastingDispatcher.java:114)
org.springframework.integration.dispatcher.UnicastingDispatcher.dispatch(UnicastingDispatcher.java:101)
org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:61)
org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:157)
org.springframework.integration.core.MessagingTemplate.doSend(MessagingTemplate.java:288)
org.springframework.integration.core.MessagingTemplate.doSendAndReceive(MessagingTemplate.java:318)
org.springframework.integration.core.MessagingTemplate.sendAndReceive(MessagingTemplate.java:239)
org.springframework.integration.gateway.MessagingGatewaySupport.doSendAndReceive(MessagingGatewaySupport.java:233)
org.springframework.integration.gateway.MessagingGatewaySupport.sendAndReceiveMessage(MessagingGatewaySupport.java:207)
org.springframework.integration.http.inbound.HttpRequestHandlingEndpointSupport.doHandleRequest(HttpRequestHandlingEndpointSupport.java:378)
org.springframework.integration.http.inbound.HttpRequestHandlingMessagingGateway.handleRequest(HttpRequestHandlingMessagingGateway.java:95)
org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter.handle(HttpRequestHandlerAdapter.java:49)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:900)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:827)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)
javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
root cause
java.lang.ClassCastException: [B cannot be cast to java.lang.String
org.springframework.integration.json.JsonToObjectTransformer.transformPayload(JsonToObjectTransformer.java:30)
org.springframework.integration.transformer.AbstractPayloadTransformer.doTransform(AbstractPayloadTransformer.java:33)
org.springframework.integration.transformer.AbstractTransformer.transform(AbstractTransformer.java:33)
org.springframework.integration.transformer.MessageTransformingHandler.handleRequestMessage(MessageTransformingHandler.java:67)
org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:97)
org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:73)
org.springframework.integration.dispatcher.UnicastingDispatcher.doDispatch(UnicastingDispatcher.java:114)
org.springframework.integration.dispatcher.UnicastingDispatcher.dispatch(UnicastingDispatcher.java:101)
org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:61)
org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:157)
org.springframework.integration.core.MessagingTemplate.doSend(MessagingTemplate.java:288)
org.springframework.integration.core.MessagingTemplate.doSendAndReceive(MessagingTemplate.java:318)
org.springframework.integration.core.MessagingTemplate.sendAndReceive(MessagingTemplate.java:239)
org.springframework.integration.gateway.MessagingGatewaySupport.doSendAndReceive(MessagingGatewaySupport.java:233)
org.springframework.integration.gateway.MessagingGatewaySupport.sendAndReceiveMessage(MessagingGatewaySupport.java:207)
org.springframework.integration.http.inbound.HttpRequestHandlingEndpointSupport.doHandleRequest(HttpRequestHandlingEndpointSupport.java:378)
org.springframework.integration.http.inbound.HttpRequestHandlingMessagingGateway.handleRequest(HttpRequestHandlingMessagingGateway.java:95)
org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter.handle(HttpRequestHandlerAdapter.java:49)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:900)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:827)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)
javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
Can anybody help me with figuring out what could possible be wrong ?
I have double checked the headers, hence i am sure that I it’s something with the configuration or Jackson’s support for unmarshalling to HashMap. Thanks for your time.
As Biju mentioned the integration graph wasnt correct, but the error was thrown even before the message reached json-to-object-transformer. After fixing the integration graph correctly i still was getting this error. after searching in spring integration forum, i found that mentioning request-payload-type in the int-http:inbound-gateway gateway solved the problem.
So the correct configuration is