A common way to use the REST protocol is to transmit a Java Bean’s content in the message body. For this option to work, we need to have a method that will allow us to marshal the Java object to and from a suitable data format.
These data formats (suitable for encoding Java objects), are supported by the REST DSL:
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<?xml version="1.0" encoding="UTF-8"?>
<project ...>
...
<dependencies>
...
<!-- use for json binding --> <dependency> <groupId>org.apache.camel</groupId> <artifactId>camel-jackson</artifactId> </dependency>
...
</dependencies>
</project> |
REST DSL Route with JSON Binding
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<?xml version="1.0" encoding="UTF-8"?>
<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
...>
...
<!-- a bean for user services -->
<bean id="userService" class="org.apache.camel.example.rest.UserService"/>
<camelContext xmlns="http://camel.apache.org/schema/blueprint">
<restConfiguration component="servlet"
bindingMode="json"
contextPath="/camel-example-servlet-rest-blueprint/rest"
port="8181">
<dataFormatProperty key="prettyPrint" value="true"/>
</restConfiguration>
<!-- defines the REST services using the base path, /user -->
<rest path="/user" consumes="application/json" produces="application/json">
<description>User rest service</description>
<!-- this is a rest GET to view a user with the given id -->
<get uri="/{id}" outType="org.apache.camel.example.rest.User">
<description>Find user by id</description>
<to uri="bean:userService?method=getUser(${header.id})"/>
</get>
<!-- this is a rest PUT to create/update a user -->
<put type="org.apache.camel.example.rest.User">
<description>Updates or create a user</description>
<to uri="bean:userService?method=updateUser"/>
</put>
<!-- this is a rest GET to find all users -->
<get uri="/findAll" outType="org.apache.camel.example.rest.User[]">
<description>Find all users</description>
<to uri="bean:userService?method=listUsers"/>
</get>
</rest>
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