I have a simple entity that I'm attempting to return using Jersey 2.x and Jackson 2.x for JSON encoding.
However when I hit the endpoint in the browser for a GET request, it fails with:
HTTP Status 500 - org.glassfish.jersey.message.internal.MessageBodyProviderNotFoundException: MessageBodyWriter not found for media type=application/json, type=class com.package.ResponseWrapper, genericType=class com.package.ResponseWrapper.
I suspect this is due to some lacking dependency or versions not matching. I tried several but still I get the same issue.
I'm using Maven, and here is how the jersey-related dependencies look like:
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet</artifactId>
<version>2.9.1</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-server</artifactId>
<version>2.9.1</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-common</artifactId>
<version>2.9.1</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.ext</groupId>
<artifactId>jersey-entity-filtering</artifactId>
<version>2.9.1</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.4.1</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.jaxrs</groupId>
<artifactId>jackson-jaxrs-json-provider</artifactId>
<version>2.4.1</version>
</dependency>
I read some folks fixing this by adding the follow dependency:
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-json</artifactId>
<version>1.8</version>
</dependency>
...but since I'm on Jersey 2.x and using Jackson's provider ( jackson-jaxrs-json-provider
) I don't think that is the way to go for me.
I'm not sure how to proceed here.. anyone has any ideas on what could I be missing?
Thank you!!
Ok, found the issue...
I forgot to add
packages("com.fasterxml.jackson.jaxrs.json");
to my ResourceConfig
class.
Now everything is working!
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