Cleaned up scoping of delegated methods

core/src/main/java/org/jclouds/rest/annotations/Caller.java

@@ -0,0 +1,38 @@
+/**
+ *
+ * Copyright (C) 2009 Cloud Conscious, LLC. <info@cloudconscious.com>
+ *
+ * ====================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ====================================================================
+ */
+package org.jclouds.rest.annotations;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import javax.inject.Qualifier;
+
+/**
+ * Apply this to implementation classes when you want Access to items from the
+ * scope of a delegate.
+ * 
+ * @author Adrian Cole
+ */
+@Target( { ElementType.TYPE, ElementType.METHOD, ElementType.PARAMETER , ElementType.FIELD})
+@Retention(RetentionPolicy.RUNTIME)
+@Qualifier
+public @interface Caller {
+}

core/src/main/java/org/jclouds/rest/config/RestClientModule.java

@@ -51,15 +51,15 @@ public class RestClientModule<S, A> extends AbstractModule {
    protected final Map<Class<?>, Class<?>> delegates;
 
    public RestClientModule(Class<S> syncClientType, Class<A> asyncClientType,
-            Map<Class<?>, Class<?>> delegates) {
+         Map<Class<?>, Class<?>> delegates) {
       this.asyncClientType = asyncClientType;
       this.syncClientType = syncClientType;
       this.delegates = delegates;
    }
 
    public RestClientModule(Class<S> syncClientType, Class<A> asyncClientType) {
-      this(syncClientType, asyncClientType, ImmutableMap.<Class<?>, Class<?>> of(syncClientType,
-               asyncClientType));
+      this(syncClientType, asyncClientType, ImmutableMap
+            .<Class<?>, Class<?>> of(syncClientType, asyncClientType));
    }
 
    @SuppressWarnings("unchecked")
@@ -68,8 +68,9 @@ public class RestClientModule<S, A> extends AbstractModule {
       // Ensures the restcontext can be looked up without generic types.
       bind(new TypeLiteral<RestContext>() {
       }).to(
-               (TypeLiteral) TypeLiteral.get(Types.newParameterizedType(RestContextImpl.class,
-                        syncClientType, asyncClientType))).in(Scopes.SINGLETON);
+            (TypeLiteral) TypeLiteral.get(Types.newParameterizedType(
+                  RestContextImpl.class, syncClientType, asyncClientType))).in(
+            Scopes.SINGLETON);
       bindAsyncClient();
       bindClient();
       bindErrorHandlers();
@@ -82,8 +83,10 @@ public class RestClientModule<S, A> extends AbstractModule {
     * ex.
     * 
     * <pre>
-    * bind(HttpRetryHandler.class).annotatedWith(Redirection.class).to(AWSRedirectionRetryHandler.class);
-    * bind(HttpRetryHandler.class).annotatedWith(ClientError.class).to(AWSClientErrorRetryHandler.class);
+    * bind(HttpRetryHandler.class).annotatedWith(Redirection.class).to(
+    *       AWSRedirectionRetryHandler.class);
+    * bind(HttpRetryHandler.class).annotatedWith(ClientError.class).to(
+    *       AWSClientErrorRetryHandler.class);
     * </pre>
     * 
     */
@@ -96,9 +99,12 @@ public class RestClientModule<S, A> extends AbstractModule {
     * ex.
     * 
     * <pre>
-    * bind(HttpErrorHandler.class).annotatedWith(Redirection.class).to(ParseAWSErrorFromXmlContent.class);
-    * bind(HttpErrorHandler.class).annotatedWith(ClientError.class).to(ParseAWSErrorFromXmlContent.class);
-    * bind(HttpErrorHandler.class).annotatedWith(ServerError.class).to(ParseAWSErrorFromXmlContent.class);
+    * bind(HttpErrorHandler.class).annotatedWith(Redirection.class).to(
+    *       ParseAWSErrorFromXmlContent.class);
+    * bind(HttpErrorHandler.class).annotatedWith(ClientError.class).to(
+    *       ParseAWSErrorFromXmlContent.class);
+    * bind(HttpErrorHandler.class).annotatedWith(ServerError.class).to(
+    *       ParseAWSErrorFromXmlContent.class);
     * </pre>
     * 
     * 
@@ -111,14 +117,16 @@ public class RestClientModule<S, A> extends AbstractModule {
    }
 
    protected void bindClient() {
-      BinderUtils.bindClient(binder(), syncClientType, asyncClientType, delegates);
+      BinderUtils.bindClient(binder(), syncClientType, asyncClientType,
+            delegates);
    }
 
+
    @Provides
    @Singleton
    @Named("sync")
    ConcurrentMap<ClassMethodArgs, Object> provideSyncDelegateMap(
-            CreateClientForCaller createClientForCaller) {
+         CreateClientForCaller createClientForCaller) {
       createClientForCaller.sync2Async = delegates;
       return new MapMaker().makeComputingMap(createClientForCaller);
    }

core/src/main/java/org/jclouds/rest/config/RestModule.java

@@ -18,9 +18,9 @@
  */
 package org.jclouds.rest.config;
 
+import java.net.URI;
 import java.util.concurrent.ConcurrentMap;
 
-import javax.inject.Inject;
 import javax.inject.Named;
 import javax.inject.Singleton;
 import javax.ws.rs.core.UriBuilder;
@@ -36,6 +36,7 @@ import org.jclouds.internal.ClassMethodArgs;
 import org.jclouds.rest.AsyncClientFactory;
 import org.jclouds.rest.HttpAsyncClient;
 import org.jclouds.rest.HttpClient;
+import org.jclouds.rest.annotations.Caller;
 import org.jclouds.rest.internal.AsyncRestClientProxy;
 import org.jclouds.rest.internal.RestAnnotationProcessor;
 
@@ -43,8 +44,10 @@ import com.google.common.base.Function;
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.MapMaker;
 import com.google.inject.AbstractModule;
+import com.google.inject.Inject;
 import com.google.inject.Injector;
 import com.google.inject.Key;
+import com.google.inject.Module;
 import com.google.inject.Provides;
 import com.google.inject.Scopes;
 import com.google.inject.TypeLiteral;
@@ -61,58 +64,99 @@ public class RestModule extends AbstractModule {
    protected void configure() {
       install(new ParserModule());
       bind(UriBuilder.class).to(UriBuilderImpl.class);
-      bind(AsyncRestClientProxy.Factory.class).to(Factory.class).in(Scopes.SINGLETON);
+      bind(AsyncRestClientProxy.Factory.class).to(Factory.class).in(
+            Scopes.SINGLETON);
       BinderUtils.bindAsyncClient(binder(), HttpAsyncClient.class);
-      BinderUtils.bindClient(binder(), HttpClient.class, HttpAsyncClient.class, ImmutableMap
-               .<Class<?>, Class<?>> of(HttpClient.class, HttpAsyncClient.class));
+      BinderUtils.bindClient(binder(), HttpClient.class, HttpAsyncClient.class,
+            ImmutableMap.<Class<?>, Class<?>> of(HttpClient.class,
+                  HttpAsyncClient.class));
    }
 
    @Provides
    @Singleton
    @Named("async")
    ConcurrentMap<ClassMethodArgs, Object> provideAsyncDelegateMap(
-            CreateAsyncClientForCaller createAsyncClientForCaller) {
+         CreateAsyncClientForCaller createAsyncClientForCaller) {
       return new MapMaker().makeComputingMap(createAsyncClientForCaller);
    }
 
-   static class CreateAsyncClientForCaller implements Function<ClassMethodArgs, Object> {
+   static class CreateAsyncClientForCaller implements
+         Function<ClassMethodArgs, Object> {
       private final Injector injector;
       private final AsyncRestClientProxy.Factory factory;
 
+      @Caller
+      @Inject(optional = true)
+      Module callerModule = new CallerScopedBindingModule();
+
       @Inject
-      CreateAsyncClientForCaller(Injector injector, AsyncRestClientProxy.Factory factory) {
+      CreateAsyncClientForCaller(Injector injector,
+            AsyncRestClientProxy.Factory factory) {
          this.injector = injector;
          this.factory = factory;
       }
 
       @SuppressWarnings("unchecked")
       @Override
-      public Object apply(ClassMethodArgs from) {
+      public Object apply(final ClassMethodArgs from) {
          Class clazz = from.getAsyncClass();
          TypeLiteral typeLiteral = TypeLiteral.get(clazz);
-         RestAnnotationProcessor util = (RestAnnotationProcessor) injector.getInstance(Key
-                  .get(TypeLiteral.get(Types.newParameterizedType(RestAnnotationProcessor.class,
-                           clazz))));
-         util.setCaller(from);
+         Injector injector = this.injector.createChildInjector(callerModule,
+               new AbstractModule() {
 
-         ConcurrentMap<ClassMethodArgs, Object> delegateMap = injector.getInstance(Key.get(
-                  new TypeLiteral<ConcurrentMap<ClassMethodArgs, Object>>() {
-                  }, Names.named("async")));
-         AsyncRestClientProxy proxy = new AsyncRestClientProxy(injector, factory, util,
-                  typeLiteral, delegateMap);
+                  @Override
+                  protected void configure() {
+                     bind(ClassMethodArgs.class).annotatedWith(Caller.class)
+                           .toInstance(from);
+                     install(callerModule);
+                  }
+
+               });
+         RestAnnotationProcessor util = (RestAnnotationProcessor) injector
+               .getInstance(Key.get(TypeLiteral.get(Types.newParameterizedType(
+                     RestAnnotationProcessor.class, clazz))));
+         // not sure why we have to go back and re-inject this...
+         injector.injectMembers(util);
+         ConcurrentMap<ClassMethodArgs, Object> delegateMap = injector
+               .getInstance(Key.get(
+                     new TypeLiteral<ConcurrentMap<ClassMethodArgs, Object>>() {
+                     }, Names.named("async")));
+         AsyncRestClientProxy proxy = new AsyncRestClientProxy(injector,
+               factory, util, typeLiteral, delegateMap);
          injector.injectMembers(proxy);
          return AsyncClientFactory.create(clazz, proxy);
       }
    }
 
+   @Singleton
+   public static class CallerScopedBindingModule extends AbstractModule {
+
+      @Provides
+      @Caller
+      URI provideCallerScopedURI(Injector injector, @Caller ClassMethodArgs args) {
+         try {
+            return RestAnnotationProcessor.getEndpointFor(args.getMethod(),
+                  args.getArgs(), injector);
+         } catch (IllegalStateException e) {
+            return null;
+         }
+      }
+
+      @Override
+      protected void configure() {
+
+      }
+   }
+
    private static class Factory implements AsyncRestClientProxy.Factory {
       @Inject
       private TransformingHttpCommandExecutorService executorService;
 
       @SuppressWarnings("unchecked")
       public TransformingHttpCommand<?> create(HttpRequest request,
-               Function<HttpResponse, ?> transformer) {
-         return new TransformingHttpCommandImpl(executorService, request, transformer);
+            Function<HttpResponse, ?> transformer) {
+         return new TransformingHttpCommandImpl(executorService, request,
+               transformer);
       }
 
    }