I'm trying to develop a simple restful api in java using jersey implementation of Jax-rs and Tomcat 9.XX server. The application produces data in XML format.
But when calling the api resource, I'm getting the following exception from the server:
Type Exception Report
Message: Servlet.init() for servlet [ApplicationConfig] threw exception
Description: The server encountered an unexpected condition that prevented it from fulfilling the request.
Exception:
javax.servlet.ServletException: Servlet.init() for servlet [ApplicationConfig] threw exception
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1417)
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Thread.java:748)
Root Cause:
java.lang.IllegalStateException: The resource configuration is not modifiable in this context.
org.glassfish.jersey.server.ResourceConfig$ImmutableState.register(ResourceConfig.java:246)
org.glassfish.jersey.server.ResourceConfig$ImmutableState.register(ResourceConfig.java:193)
org.glassfish.jersey.server.ResourceConfig.register(ResourceConfig.java:426)
org.glassfish.jersey.servlet.WebComponent.<init>(WebComponent.java:306)
org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:154)
org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:346)
javax.servlet.GenericServlet.init(GenericServlet.java:158)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1417)
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Thread.java:748)
I'm unable to figure out what's causing this issue.
The base model of the application was able to properly output xml data but when I tried to implement HATEOS model for including links in the data, server has started throwing exceptions.
jersey app config:
import java.util.HashMap;
import java.util.Map;
import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;
@ApplicationPath(value = "restapi")
public class ApplicationConfig extends Application {
@Override
public Map<String, Object> getProperties() {
Map<String, Object> properties = new HashMap<>();
properties.put("jersey.config.server.provider.packages", "restresources");
return properties;
}
}
Rest resource:
@Path(value = "poketype")
public class PokemonTypeRestResource {
PokemonTypeService typeService = new PokemonTypeService();
@GET
@Produces(value = MediaType.APPLICATION_XML)
public List<PokemonType> returnAllTypes(@Context UriInfo uriInfo) {
List<PokemonType> allTypes = typeService.getAllTypes();
allTypes.forEach((t) -> {
String uri = uriInfo.getBaseUriBuilder().path(PokemonTypeRestResource.class).path(t.getType()).build().toString();
t.getLinks().add(new Link(uri, "Self"));
});
return allTypes;
}
@Path("{type}")
@GET
@Produces(value = MediaType.APPLICATION_XML)
public List<PokemonType> returnSpecificType(@PathParam("type") String type, @Context UriInfo uriInfo) {
List<PokemonType> specificType = typeService.getSpecificType(type);
specificType.forEach((t) -> {
String uri = uriInfo.getBaseUriBuilder().path(PokemonTypeRestResource.class).path(t.getType()).build().toString();
t.getLinks().add(new Link(uri, "Self"));
});
return specificType;
}
@Path("filter")
@GET
@Produces(value = MediaType.APPLICATION_XML)
public List<PokemonType> returnWeatherBoostedPokemonTypes(@QueryParam("weather") String weather, @Context UriInfo uriInfo) {
List<PokemonType> weatherBoostedTypes = typeService.getWeatherBoostedTypes(weather);
weatherBoostedTypes.forEach((t) -> {
String uri = uriInfo.getBaseUriBuilder().path(PokemonTypeRestResource.class).path(t.getType()).build().toString();
t.getLinks().add(new Link(uri, "Self"));
});
return weatherBoostedTypes;
}
}
Resource model:
@XmlRootElement(name = "Pokemon_Type")
@XmlAccessorType(value = XmlAccessType.FIELD)
@Entity
@Table(name = "pokemon_types")
public class PokemonType implements Serializable
{
//type & weather
@XmlElement(name = "Type")
@Id
@Column(name="type")
private String type;
@XmlElement(name = "Boosted_Weather")
@Column(name="weather")
private String weather;
@XmlElement(name = "Links")
private List<Link> links = new ArrayList<>();
//constructors
//getters & setters
}
I'm unable to find anything wrong with ApplicationConfig.java class as this worked before without any issues in other applications. Am I messing anything else in configuring the jersey application?
