Guice Jersey ClientConfig MessageBodyWriters and Injection - jersey

Question

I'm trying to get Guice injection working with a Jersey MessageBodyReader/MessageBodyWriter from the client perspective. I have the server starting up properly with Guice. My issue is with the client.
I whipped together the following which demonstrates the error: SEVERE: Missing dependency for constructor public FooExample$FooReader(FooExample$FooUnmarshaller) at parameter index 0
import java.io.IOException;
import java.io.InputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import javax.inject.Inject;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.core.UriBuilder;
import javax.ws.rs.ext.MessageBodyReader;
import com.google.inject.AbstractModule;
import com.google.inject.Guice;
import com.google.inject.Injector;
import com.google.inject.Provides;
import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.api.client.config.ClientConfig;
import com.sun.jersey.api.client.config.DefaultClientConfig;
class FooExample {
public static void main(String[] args) {
Injector i = Guice.createInjector(new FooExample().new FooModule());
WebResource service = i.getInstance(WebResource.class);
service.path("bar")
.accept(MediaType.APPLICATION_XML)
.put(String.class, "test123");
}
public class FooModule extends AbstractModule{
#Override
protected void configure() {
bind(FooUnmarshaller.class).to(SimpleFooUnmarshaller.class);
}
#Provides
public WebResource configuredClient() {
ClientConfig config = new DefaultClientConfig();
config.getClasses().add(FooReader.class);
return Client.create(config).resource(
UriBuilder.fromUri("http://localhost:8080/foo").build());
}
}
public static class Foo {}
public static interface FooUnmarshaller {
public Foo unmarshall(InputStream is);
}
public static class SimpleFooUnmarshaller implements FooUnmarshaller {
#Override
public Foo unmarshall(InputStream is) {
return new Foo();
}
}
public static class FooReader implements MessageBodyReader<Foo> {
private final FooUnmarshaller marshaller;
#Inject
public FooReader(FooUnmarshaller marshaller) {
this.marshaller = marshaller;
}
#Override
public boolean isReadable(
Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType) {
return true;
}
#Override
public Foo readFrom(
Class<Foo> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, String> httpHeaders,
InputStream entityStream) throws IOException, WebApplicationException {
return marshaller.unmarshall(entityStream);
}
}
}
Where I get console output:
Oct 23, 2012 3:17:22 PM com.sun.jersey.spi.inject.Errors processErrorMessages
SEVERE: The following errors and warnings have been detected with resource and/or provider classes:
SEVERE: Missing dependency for constructor public FooExample$FooReader(FooExample$FooUnmarshaller) at parameter index 0
Exception in thread "main" com.google.inject.ProvisionException: Guice provision errors:
1) Error in custom provider, com.sun.jersey.spi.inject.Errors$ErrorMessagesException
at FooExample$FooModule.configuredClient(FooExample.java:40)
while locating com.sun.jersey.api.client.WebResource
1 error
at com.google.inject.internal.InjectorImpl$4.get(InjectorImpl.java:987)
at com.google.inject.internal.InjectorImpl.getInstance(InjectorImpl.java:1013)
at FooExample.main(FooExample.java:25)
Caused by: com.sun.jersey.spi.inject.Errors$ErrorMessagesException
at com.sun.jersey.spi.inject.Errors.processErrorMessages(Errors.java:170)
at com.sun.jersey.spi.inject.Errors.postProcess(Errors.java:136)
at com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:199)
at com.sun.jersey.api.client.Client.<init>(Client.java:187)
at com.sun.jersey.api.client.Client.<init>(Client.java:170)
at com.sun.jersey.api.client.Client.create(Client.java:679)
at FooExample$FooModule.configuredClient(FooExample.java:42)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at com.google.inject.internal.ProviderMethod.get(ProviderMethod.java:104)
at com.google.inject.internal.InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:40)
at com.google.inject.internal.InjectorImpl$4$1.call(InjectorImpl.java:978)
at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1024)
at com.google.inject.internal.InjectorImpl$4.get(InjectorImpl.java:974)
... 2 more
I have the feeling I need to use GuiceComponentProviderFactory, but I cant seem to find any documentation on it nor IoCComponentProviderFactory with ClientConfig. Any help would be much appreciated. Thanks!

Answer 1

So I solved my own question by guess and check. I cant confirm that this was the intended way to do things, but this works.
The Client class has a method: public static Client create(ClientConfig cc, IoCComponentProviderFactory provider) that I passed a GuiceComponentProviderFactory to and things worked out. A working version of the above code is:
import java.io.IOException;
import java.io.InputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import javax.inject.Inject;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.core.UriBuilder;
import javax.ws.rs.ext.MessageBodyReader;
import com.google.inject.AbstractModule;
import com.google.inject.Guice;
import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.api.client.config.DefaultClientConfig;
import com.sun.jersey.api.core.DefaultResourceConfig;
import com.sun.jersey.core.spi.component.ioc.IoCComponentProviderFactory;
import com.sun.jersey.guice.spi.container.GuiceComponentProviderFactory;
class FooExample {
public static void main(String[] args) {
WebResource service = configuredClient();
service.path("bar")
.accept(MediaType.APPLICATION_XML)
.put(String.class, "test123");
}
private static WebResource configuredClient() {
DefaultClientConfig config = new DefaultClientConfig();
config.getClasses().add(FooReader.class);
return Client.create(config, provider()).resource(
UriBuilder.fromUri("http://localhost:8080/foo").build());
}
private static IoCComponentProviderFactory provider() {
return new GuiceComponentProviderFactory(
new DefaultResourceConfig(),
Guice.createInjector(new FooExample().new FooModule()));
}
public class FooModule extends AbstractModule {
#Override
protected void configure() {
bind(FooUnmarshaller.class).to(SimpleFooUnmarshaller.class);
}
}
public static class Foo {}
public static interface FooUnmarshaller {
public Foo unmarshall(InputStream is);
}
public static class SimpleFooUnmarshaller implements FooUnmarshaller {
#Override
public Foo unmarshall(InputStream is) {
return new Foo();
}
}
public static class FooReader implements MessageBodyReader<Foo> {
private final FooUnmarshaller marshaller;
#Inject
public FooReader(FooUnmarshaller marshaller) {
this.marshaller = marshaller;
}
#Override
public boolean isReadable(
Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType) {
return true;
}
#Override
public Foo readFrom(
Class<Foo> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, String> httpHeaders,
InputStream entityStream) throws IOException, WebApplicationException {
return marshaller.unmarshall(entityStream);
}
}
}
and outputs
Oct 23, 2012 5:17:11 PM com.sun.jersey.guice.spi.container.GuiceComponentProviderFactory getComponentProvider
INFO: Binding FooExample$FooReader to GuiceInstantiatedComponentProvider
Exception in thread "main" com.sun.jersey.api.client.UniformInterfaceException: PUT http://localhost:8080/foo/bar returned a response status of 404 Not Found
at com.sun.jersey.api.client.WebResource.handle(WebResource.java:686)
at com.sun.jersey.api.client.WebResource.access$200(WebResource.java:74)
at com.sun.jersey.api.client.WebResource$Builder.put(WebResource.java:537)
at FooExample.main(FooExample.java:28)
meaning the guice bindings worked! =)