How can i call a SOAP web service with an empty message body using Apache Camel?
For example, the final endpoint on a route would be the invocation of a method on my proxy that takes 0 arguments.
EDIT:
example xml configuration:
<route id="someRoute">
<from uri="ref:activemq-queue"/>
<setHeader headerName="operationName">
<constant>invoke</constant>
</setHeader>
<to uri="cxf:bean:someWS"/>
</route>
...
<cxf:cxfEndpoint id="someWS" address="${ws.address}"
serviceClass="com.example.ws.SomeWS"
The problem is that the method 'invoke' on the WS takes 0 arguments, and an exception is thrown stating that 1 argument is being received. Is there a way for me to specify to ignore this received input?
You can set the message body to be null, if the invocation just take 0 argument. null simple expression is added since camel 2.12.3.
<route id="someRoute">
<from uri="ref:activemq-queue"/>
<setBody>
<simple>null</simple>
</setBody>
<setHeader headerName="operationName">
<constant>invoke</constant>
</setHeader>
<to uri="cxf:bean:someWS"/>
</route>
I also needed to set an empty body to Apache Camel xml and the solution below worked for me.
<setBody id="set-empty-body">
<constant/>
</setBody>
Hope this helps to whoever need it.
The xml configuration will fail if the content of the body is not with the correct type of the class required by the method of your bean. By default, it could be an Object and not a String. When the method recieves the body in an incorrect format, it would process a null value, instead of the body of the route. To solve this problem, you will need to convert the body into the expected class of the method of your bean. For example, if the method's argument of the bean is a String, then you could do something like:
<route id="someRoute">
<from uri="ref:activemq-queue"/>
<setHeader headerName="operationName">
<constant>invoke</constant>
</setHeader>
<convertBodyTo type="String"/>
<to uri="cxf:bean:someWS"/>
</route>
For more information about body conversion, you can check the docs: https://camel.apache.org/components/3.14.x/eips/convertBodyTo-eip.html
Related
I'm using a ActiveMQ Broker with built-in Camel Routes. I want to read a file after an Event received.
<pseudo>
from Event A
read File XY
to Event B with Body from File XY
</pseuod>
I simple tried moving files from a temporary directory based on an event but only event B is written. In the Log file are no Exceptions or Error messages.
<camelContext id="camel" xmlns="http://camel.apache.org/schema/spring">
<!-- You can use Spring XML syntax to define the routes here using the <route> element -->
<route>
<description>Example Camel Route</description>
<from uri="activemq:example.A"/>
<from uri="file://tmp/a?delete=true"/>
<to uri="file://tmp/b?overruleFile=copy-of-${file:name}"/>
<to uri="activemq:example.B"/>
</route>
</camelContext>
Update with working solution for single file:
<camelContext id="camel" xmlns="http://camel.apache.org/schema/spring">
<!-- You can use Spring XML syntax to define the routes here using the <route> element -->
<route>
<description>Example Camel Route</description>
<from uri="activemq:example.A"/>
<pollEnrich>
<constant>file:///tmp/a?fileName=file1</constant>
</pollEnrich>
<log message="file content ${body}"/>
<to uri="activemq:example.B"/>
</route>
</camelContext>
You need to use Content Enrichers for this. This is exactly what you are looking for.
<route>
<from uri="activemq:example.A"/>
<pollEnrich>
<constant>file://tmp/a?delete=true</constant>
</pollEnrich>
<to uri="activemq:example.B"/>
</route>
Please be aware that for camel version 2.15 or older
pollEnrich does not access any data from the current Exchange which
means when polling it cannot use any of the existing headers you may
have set on the Exchange. For example you cannot set a filename in the
Exchange.FILE_NAME header and use pollEnrich to consume only that
file. For that you must set the filename in the endpoint URI.
I have a route using the Spring DSL as such
<camelContext id="camel" xmlns="http://camel.apache.org/schema/spring">
<route>
<from uri="activemq:queue:worker?mapJmsMessage=false" />
<convertBodyTo type="java.lang.String"/>
<setHeader headerName="CamelHttpMethod">
<constant>POST</constant>
</setHeader>
<to uri="http://localhost/queue" />
</route>
</camelContext>
The message type is an ActiveMQTextMessage. I am able to POST the message to the HTTP URL, but what I get seems to be the toString() output:
ActiveMQTextMessage {commandId = 5, responseRequired = false, message....
I would like to call the getText() method on the ActiveMQTextMessage instance to populate the route, but I cannot figure out how to get that method called. I am quite sure I could get this to work in code, but I need to do everything via XML.
Figured out the problem. I had mapJmsMessage=false set to handle an exception a few days ago. I removed it and suddenly it worked fine.
I have this Camel Route:
<route id="externalRestPushRoute">
<from uri="jms:pushProcessedRecordsToExternal" />
<setHeader headerName="PAYLOAD">
<simple>body</simple>
</setHeader>
<marshal ref="jack"></marshal>
<to uri="http://localhost/front/rest/karec/dummy-push"/>
<transform>
<simple>in.header[PAYLOAD]</simple>
</transform>
<to uri="bean:noAuthRecordPersistenceService?method=deliverySuccess" />
</route>
The idea is this:
I want to deliver an object in JSON format to a REST endpoint(all the headers are properly set and the rest endpoint receives the json format)/
To convert the object to JSON format I use marshal and it works.
Now, the response back from the http endpoint is of type java.io.InputStream but I don't care.
What I care is converting the body back to the original object before it was marshaled.
I did save the object in a header before marshaling in a header named PAYLOAD.
Now I want to use transform to get it back into the body of the message.
Well, that does not seem to work. When it get to the last bean it complains that body is still of type java.io.InputStream.
Stores the body on the exchange property instead of a header, that is safer.
<setProperty propertyName="PAYLOAD">
<simple>body</simple>
</setProperty>
<transform>
<simple>${property.PAYLOAD}</simple>
</transform>
I have created a simple cxf web service. following is the body of soap message
<soapenv:Body>
<bean:getRTOEmployeeSalary>
<!--Optional:-->
<bean:arg0>sdf</bean:arg0>
</bean:getRTOEmployeeSalary>
</soapenv:Body>
My requirement is to extract the value of arg0 in my camel context file. i.e. i want to log the value of arg0. Please help me on this
<route routePolicyRef="loggingInInterceptor">
<from uri="cxf:bean:rtoemplyeeService"/>
<setHeader headerName="exchange">
<spel>${exchange}</spel>
</setHeader>
<log message="value of arg0======== "/>
<convertBodyTo type="java.lang.String" id="stringInput"/>
<bean ref="rtoEmpBean" method="getRTOEmployeeSalary" beanType="rtoEmpBean" id="govtRTOEmp"/>
</route>
I need to use the value of arg0 here.
We can use camel provided spring expression language to extract the value from exchange object. Since exchange object also resides in spring container.
below will be code src to extract the value of arg0 in camel context-
<setHeader headerName="arg0">
<spel>#{exchange.in.body.get(0)}</spel>
</setHeader>
This will set the value of arg0 of soap message in a header named arg0.
http://camel.apache.org/spel.html
I want to build a route something like
<route>
<from uri="servlet:///user?matchOnUriPrefix=true"/>
<to uri="direct:put"/>
</route>
<route>
<from uri="direct:put"/>
<setHeader headerName="CamelHazelcastOperationType">
<constant>put</constant>
</setHeader>
<to uri="hazelcast:map:foo"/>
</route>
ie everything that matches POST:/user/{cachename}/{key1} should take the key1 as key and place the payload under key:key1 to map:{cachename}.
Same thing for
GET:/user/{cachename}/{key1} should take the {key1} as key and retrieve the payload under key1 from map:{cachename}.
Any Help will be highly appreciated.
Thanks,
You should have a number of Camel headers available from the incoming servlet, such as:
CamelHttpMethod = GET
CamelHttpPath = /user/{cachename}/{key1}
You could use code or an expression language to extract the information from there, a very basic example would be:
<setHeader headerName="cachename">
<simple>${header.CamelHttpPath.split("/")[2]}</simple>
</setHeader>
<setHeader headerName="key1">
<simple>${header.CamelHttpPath.split("/")[3]}</simple>
</setHeader>