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RE: Apache camel rest dsl RestBindingMode.json is throwing exception


Hi Rahul,

Could you try simplifying the route to determine where it's starting to break down for you? Initially just declare something trivial with just the endpoint, mapping and processor.

restConfiguration().component("spark-rest").bindingMode(RestBindingMode.json);
    	rest("/balance").post("/update")
    	  .type(BalanceInfo.class)
    	  .route()
	  .process(this::process)
    	  .endRest();

Call you bean from the process method and see if that still works. If it's working, then start adding the other configuration bits one by one and see where things start falling over, that might help track things down faster.


Regards,
Valdis

-----Original Message-----
From: rahul vashishth [mailto:vrahul1991@xxxxxxxxx] 
Sent: 23 October 2018 15:03
To: users@xxxxxxxxxxxxxxxx
Subject: Apache camel rest dsl RestBindingMode.json is throwing exception

I am trying to build rest api using camel-rest-dsl. I have tried with multiple provider, spark-rest, jetty. But it throwing marshelling exception when i use RestBindingMode.json, if i remove rest binding mode then it works fine with string type.

I am using version 2.22.1

*SpringRouteBuilder*
*--------------------------*
@Component
public class RestAPIRoutes extends SpringRouteBuilder {
    @Override
    public void configure() throws Exception {
        restConfiguration().component("spark-rest")
            .bindingMode(RestBindingMode.json)
            .port(8787)
            .dataFormatProperty("prettyPrint","true");


rest("/balance").produces("application/json").consumes("application/json")
            /* mock api */

.get("/query").route().bean(BalanceService.class,"fetchBalance").endRest()
            /* fetch balance by msisdn*/
            .get("/query/{msisdn}").description("Fetch line balance by
msisdn")

.type(BalanceInfo.class).to("bean:balanceService?method=fetchBalance(${header.msisdn})")

.post("/update").type(BalanceInfo.class).outType(BalanceInfo.class).to("bean:balanceService?method=updateBalance");
    }
}

Here balanceService is a simple Spring @Service with overloaded method and BalanceInfo is simple pojo class with two field and getter setters.

*Pom dependency*

  <dependency>
        <groupId>org.apache.camel</groupId>
        <artifactId>camel-spark-rest</artifactId>
        <version>2.22.1</version>
    </dependency>
<dependency>
        <groupId>org.apache.camel</groupId>
        <artifactId>camel-spring-boot-starter</artifactId>
        <version>2.22.1</version>
    </dependency>

*Exception*

org.apache.camel.processor.binding.BindingException: Cannot bind to json as message body is not json compatible.
Exchange[ID-LTB0202777-MAC-1540301942376-3-1]
    at
org.apache.camel.processor.RestBindingAdvice.unmarshal(RestBindingAdvice.java:317)
~[camel-core-2.22.1.jar:2.22.1]
    at
org.apache.camel.processor.RestBindingAdvice.before(RestBindingAdvice.java:137)
~[camel-core-2.22.1.jar:2.22.1]


Please help

Rahul

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