How to get file resources and do a custom JSON Marshaller in a Jersey web app?

Question

I am running a web application using Jersey. In my controller, I am trying to get a file in resources and also return an object which contains an enum. I am getting errors at both of these steps.

When the file is being fetched, I am getting a java.io.FileNotFoundException: src\main\resources\tsv\ProductValid.tsv (The system cannot find the path specified)
When the object is being marshalled, I am getting errors:

    jakarta.xml.bind.JAXBException: Implementation of Jakarta XML Binding-API has not been found on module path or classpath.
         - with linked exception:
        [java.lang.ClassNotFoundException: com.sun.xml.bind.v2.ContextFactory]

and

[Exception [EclipseLink-50001] (Eclipse Persistence Services - 3.0.0.v202012081010): org.eclipse.persistence.exceptions.JAXBException
Exception Description: The class com.jtv.insights.tool.model.IngestionLogs requires a zero argument constructor or a specified factory method.  Note that non-static inner classes do not have zero argument constructors and are not supported.]
Jul 14, 2021 11:15:17 AM org.glassfish.jersey.message.internal.WriterInterceptorExecutor$TerminalWriterInterceptor aroundWriteTo
SEVERE: MessageBodyWriter not found for media type=application/json, type=class java.util.ArrayList, genericType=java.util.List<com.jtv.insights.tool.model.IngestionLogs>.

My folder structure is:

My gradle dependencies are:

dependencies {
    implementation group: 'org.glassfish.jersey.containers', name: 'jersey-container-servlet', version: '3.0.2'
    implementation group: 'org.glassfish.jersey.inject', name: 'jersey-hk2', version: '3.0.2'
    implementation group: 'org.glassfish.jersey.media', name: 'jersey-media-moxy', version: '3.0.2'
}

My code is:

@GET
@Path(value = "/log/details/{fileId}")
@Produces(MediaType.APPLICATION_JSON)
public List<IngestionLogs> getIngestionLogDetails(@PathParam("fileId") String fileId) {
    List<IngestionLogs> logs = new ArrayList<>();

    try {
        String key = "Physical/STP_20201214.tsv";
        File file = new File("src/main/resources/tsv/ProductValid.tsv");
        InputStream stream = new FileInputStream(file);
        List<IngestionLogs> errors = TsvFileValidators.parseObject(stream);
        logs.addAll(errors);
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }
    try {
        Map<String, Object> properties = new HashMap<String, Object>();
        properties.put("eclipselink.media-type", "application/json");
         
        JAXBContext ctx = JAXBContext.newInstance(new Class[] { IngestionLogs.class }, properties);
        Marshaller jsonMarshaller = ctx.createMarshaller();
        jsonMarshaller.setProperty(MarshallerProperties.MEDIA_TYPE, MediaType.APPLICATION_JSON);
        jsonMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
        jsonMarshaller.marshal(logs, System.out);
    } catch (JAXBException e) {
        e.printStackTrace();
    }
    
    return logs;
}

How do I fix these two errors?

How to get file resources and do a custom JSON Marshaller in a Jersey web app?

0 Answers0