TestResource.java

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package org.glassfish.jersey.tests.integration.jersey2704;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Response;

import javax.inject.Inject;

import org.glassfish.jersey.internal.inject.InjectionManager;

/**
 * This resource is used to test if specific service class instance is available in the
 * {@link InjectionManager} that comes from Jersey context.
 *
 * @author Bartosz Firyn (bartoszfiryn at gmail.com)
 */
@Path("test")
public class TestResource {

    InjectionManager injectionManager;

    /**
     * Inject {@link InjectionManager} from Jersey context.
     *
     * @param injectionManager the {@link InjectionManager}
     */
    @Inject
    public TestResource(InjectionManager injectionManager) {
        this.injectionManager = injectionManager;
    }

    /**
     * This method will test given class by checking if it is available in {@link InjectionManager}
     * that has been injected from the Jersey context.
     *
     * @param clazz the service class name to check
     * @return {@link Response} with status code 200 if service is available, 600 otherwise
     * @throws Exception in case when there are any error (e.g. class not exist)
     */
    @GET
    @Path("{clazz}")
    @Produces("text/plain")
    public Response test(@PathParam("clazz") String clazz) throws Exception {
        return Response
            .status(injectionManager.getInstance(Class.forName(clazz)) != null ? 200 : 600)
            .build();
    }
}