Type boolean, and MIME media type application/octet-stream was not found Java (Jersey)

Question

I am using Jersey version 1.12 and i am facing the error that is

A message body writer for Java class java.lang.Boolean, and Java type boolean, and MIME media type application/octet-stream was not found

    at com.sun.jersey.spi.container.ContainerResponse.write(ContainerResponse.java:285)
    at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1451)
    at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1363)
    at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1353)
    at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:414)
    at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537)
    at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:708)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

my code is

        @POST
        @Path("/save/{Name}/{data}")
        @Consumes("application/x-www-form-urlencoded")
        public String saveDataMap(@QueryParam("number") String number,
        @PathParam("data") String data,
        @PathParam("Name") String appName
        MultivaluedMap<String, String> formParam) throws Exception{
        boolean response =false'
        try{
        // some business logic
        response =true
        }

        return response;
        }

After Googling this error i found that this is due to you are not specifying the content type of the data you are sending - so Jersey is not able to locate the right MessageBodyWritter to serialize

after this i added produces anotation to the method with the MediaType.TEXT_PLAIN but it doesn't work ,but when i changed return type of method to String it started working.

I simply wants to know whats problem with boolean ,why it is not working with boolean ? and how to solve this problem without changing boolean to String ?

any help will be greatly appreciated.

Answer 1

I usually code these methods like this:

    @POST
    @Path("/save/{Name}/{data}")
    @Consumes("application/x-www-form-urlencoded")
    @Produces(MediaType.TEXT_PLAIN)
    public Response saveDataMap(@QueryParam("number") String number,
    @PathParam("data") String data,
    @PathParam("Name") String appName
    MultivaluedMap<String, String> formParam) throws Exception{
    boolean response =false
    try{
    // some business logic
    response =true
    }

    return Response.ok().entity(String.valueOf(response)).build();
    }

The only changes is that it returns a jersey HTTP response building it from a string from a boolean.

I hope it helps.

Regards, Cris.