Merge pull request #782 from grkvlt/openstack

Further OpenStack extensibility changes

apis/openstack-keystone/src/main/java/org/jclouds/openstack/keystone/v2_0/KeystoneApi.java

@@ -21,12 +21,16 @@ package org.jclouds.openstack.keystone.v2_0;
 import java.util.concurrent.TimeUnit;
 
 import org.jclouds.concurrent.Timeout;
+import org.jclouds.javax.annotation.Nullable;
+import org.jclouds.location.functions.ZoneToEndpoint;
 import org.jclouds.openstack.keystone.v2_0.domain.ApiMetadata;
 import org.jclouds.openstack.keystone.v2_0.features.ServiceApi;
 import org.jclouds.openstack.keystone.v2_0.features.TenantApi;
 import org.jclouds.openstack.keystone.v2_0.features.TokenApi;
 import org.jclouds.openstack.keystone.v2_0.features.UserApi;
+import org.jclouds.openstack.v2_0.features.ExtensionApi;
 import org.jclouds.rest.annotations.Delegate;
+import org.jclouds.rest.annotations.EndpointParam;
 
 import com.google.common.base.Optional;
 
@@ -54,6 +58,12 @@ public interface KeystoneApi {
    @Delegate
    ServiceApi getServiceApi();
 
+   /**
+    * Provides synchronous access to Extension features.
+    */
+   @Delegate
+   ExtensionApi getExtensionApi();
+
    /** 
     * Provides synchronous access to Token features 
     */
@@ -66,7 +76,6 @@ public interface KeystoneApi {
    @Delegate
    Optional<UserApi> getUserApi();
    
-
    /** 
     * Provides synchronous access to Tenant features 
     */

apis/openstack-keystone/src/main/java/org/jclouds/openstack/keystone/v2_0/KeystoneAsyncApi.java

@@ -27,6 +27,7 @@ import org.jclouds.openstack.keystone.v2_0.features.ServiceAsyncApi;
 import org.jclouds.openstack.keystone.v2_0.features.TenantAsyncApi;
 import org.jclouds.openstack.keystone.v2_0.features.TokenAsyncApi;
 import org.jclouds.openstack.keystone.v2_0.features.UserAsyncApi;
+import org.jclouds.openstack.v2_0.features.ExtensionAsyncApi;
 import org.jclouds.rest.annotations.Delegate;
 import org.jclouds.rest.annotations.ExceptionParser;
 import org.jclouds.rest.annotations.SelectJson;
@@ -60,6 +61,12 @@ public interface KeystoneAsyncApi {
    @Delegate
    ServiceAsyncApi getServiceApi();
 
+   /**
+    * Provides asynchronous access to Extension features.
+    */
+   @Delegate
+   ExtensionAsyncApi getExtensionApi();
+
    /**
     * @see KeystoneApi#getTokenApi()
     */
@@ -71,7 +78,6 @@ public interface KeystoneAsyncApi {
     */
    @Delegate
    Optional<UserAsyncApi> getUserApi();
-   
 
    /**
     * @see KeystoneApi#getTenantApi()

apis/openstack-keystone/src/main/java/org/jclouds/openstack/keystone/v2_0/config/KeystoneRestClientModule.java

@@ -23,6 +23,8 @@ import static org.jclouds.util.Suppliers2.getLastValueInMap;
 import java.net.URI;
 import java.util.Map;
 import java.util.NoSuchElementException;
+import java.util.Set;
+import java.util.concurrent.TimeUnit;
 
 import javax.inject.Singleton;
 
@@ -41,11 +43,14 @@ import org.jclouds.openstack.keystone.v2_0.features.TokenApi;
 import org.jclouds.openstack.keystone.v2_0.features.TokenAsyncApi;
 import org.jclouds.openstack.keystone.v2_0.features.UserApi;
 import org.jclouds.openstack.keystone.v2_0.features.UserAsyncApi;
-import org.jclouds.openstack.keystone.v2_0.functions.PresentWhenAdminURLExistsForIdentityService;
 import org.jclouds.openstack.keystone.v2_0.handlers.KeystoneErrorHandler;
 import org.jclouds.openstack.keystone.v2_0.suppliers.RegionIdToAdminURIFromAccessForTypeAndVersion;
 import org.jclouds.openstack.keystone.v2_0.suppliers.RegionIdToAdminURISupplier;
 import org.jclouds.openstack.v2_0.ServiceType;
+import org.jclouds.openstack.v2_0.domain.Extension;
+import org.jclouds.openstack.v2_0.features.ExtensionApi;
+import org.jclouds.openstack.v2_0.features.ExtensionAsyncApi;
+import org.jclouds.openstack.v2_0.functions.PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet;
 import org.jclouds.openstack.v2_0.services.Identity;
 import org.jclouds.rest.ConfiguresRestClient;
 import org.jclouds.rest.annotations.ApiVersion;
@@ -54,7 +59,13 @@ import org.jclouds.rest.functions.ImplicitOptionalConverter;
 import org.jclouds.util.Suppliers2;
 
 import com.google.common.base.Supplier;
+import com.google.common.base.Suppliers;
+import com.google.common.cache.CacheBuilder;
+import com.google.common.cache.CacheLoader;
+import com.google.common.cache.LoadingCache;
 import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableMultimap;
+import com.google.common.collect.Multimap;
 import com.google.common.reflect.TypeToken;
 import com.google.inject.AbstractModule;
 import com.google.inject.Provides;
@@ -70,17 +81,18 @@ public class KeystoneRestClientModule<S extends KeystoneApi, A extends KeystoneA
          RestClientModule<S, A> {
 
    public static final Map<Class<?>, Class<?>> DELEGATE_MAP = ImmutableMap.<Class<?>, Class<?>> builder()
-            .put(ServiceApi.class, ServiceAsyncApi.class).put(TokenApi.class, TokenAsyncApi.class)
+            .put(ServiceApi.class, ServiceAsyncApi.class)
-            .put(UserApi.class, UserAsyncApi.class).put(TenantApi.class, TenantAsyncApi.class).build();
+            .put(ExtensionApi.class, ExtensionAsyncApi.class)
+            .put(TokenApi.class, TokenAsyncApi.class)
+            .put(UserApi.class, UserAsyncApi.class)
+            .put(TenantApi.class, TenantAsyncApi.class)
+            .build();
 
-   @SuppressWarnings("unchecked")
    public KeystoneRestClientModule() {
-      super(TypeToken.class.cast(TypeToken.of(KeystoneApi.class)), TypeToken.class.cast(TypeToken
+      super(TypeToken.class.cast(TypeToken.of(KeystoneApi.class)), TypeToken.class.cast(TypeToken.of(KeystoneAsyncApi.class)), DELEGATE_MAP);
-               .of(KeystoneAsyncApi.class)), DELEGATE_MAP);
    }
 
-   protected KeystoneRestClientModule(TypeToken<S> syncApiType, TypeToken<A> asyncApiType,
+   protected KeystoneRestClientModule(TypeToken<S> syncApiType, TypeToken<A> asyncApiType, Map<Class<?>, Class<?>> sync2Async) {
-            Map<Class<?>, Class<?>> sync2Async) {
       super(syncApiType, asyncApiType, sync2Async);
    }
 
@@ -88,7 +100,6 @@ public class KeystoneRestClientModule<S extends KeystoneApi, A extends KeystoneA
 
       @Override
       protected void configure() {
-         bind(ImplicitOptionalConverter.class).to(PresentWhenAdminURLExistsForIdentityService.class);
          install(new FactoryModuleBuilder().implement(RegionIdToAdminURISupplier.class,
                   RegionIdToAdminURIFromAccessForTypeAndVersion.class).build(RegionIdToAdminURISupplier.Factory.class));
       }
@@ -112,6 +123,31 @@ public class KeystoneRestClientModule<S extends KeystoneApi, A extends KeystoneA
       }
    }
 
+   @Override
+   protected void configure() {
+      bind(ImplicitOptionalConverter.class).to(PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet.class);
+      super.configure();
+   }
+   
+   @Provides
+   @Singleton
+   public Multimap<URI, URI> aliases() {
+       return ImmutableMultimap.<URI, URI>builder()
+          .build();
+   }
+
+   @Provides
+   @Singleton
+   public LoadingCache<String, Set<? extends Extension>> provideExtensionsByZone(final javax.inject.Provider<KeystoneApi> keystoneApi) {
+      return CacheBuilder.newBuilder().expireAfterWrite(23, TimeUnit.HOURS)
+            .build(CacheLoader.from(Suppliers.memoize(new Supplier<Set<? extends Extension>>() {
+               @Override
+               public Set<? extends Extension> get() {
+                  return keystoneApi.get().getExtensionApi().listExtensions();
+               }
+            })));
+   }
+
    @Override
    protected void bindErrorHandlers() {
       bind(HttpErrorHandler.class).annotatedWith(Redirection.class).to(KeystoneErrorHandler.class);

apis/openstack-keystone/src/main/java/org/jclouds/openstack/keystone/v2_0/functions/PresentWhenAdminURLExistsForIdentityService.java

@@ -1,46 +0,0 @@
-/**
- * Licensed to jclouds, Inc. (jclouds) under one or more
- * contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  jclouds licenses this file
- * to you 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.openstack.keystone.v2_0.functions;
-
-import javax.inject.Singleton;
-
-import org.jclouds.internal.ClassMethodArgsAndReturnVal;
-import org.jclouds.rest.functions.ImplicitOptionalConverter;
-
-import com.google.common.base.Optional;
-
-/**
- * 
- * @author Adrian Cole
- * 
- */
-@Singleton
-public class PresentWhenAdminURLExistsForIdentityService implements ImplicitOptionalConverter {
-
-   @Override
-   public Optional<Object> apply(ClassMethodArgsAndReturnVal input) {
-      //TODO: log and return absent when the admin url for identity service isn't available
-      return Optional.of(input.getReturnVal());
-   }
-
-   public String toString() {
-      return "presentWhenAdminURLExistsForIdentityService()";
-   }
-
-}

apis/openstack-keystone/src/main/java/org/jclouds/openstack/v2_0/domain/Extension.java

@@ -16,7 +16,7 @@
  * specific language governing permissions and limitations
  * under the License.
  */
-package org.jclouds.openstack.nova.v2_0.domain;
+package org.jclouds.openstack.v2_0.domain;
 
 import static com.google.common.base.Preconditions.checkNotNull;
 
@@ -26,8 +26,6 @@ import java.util.Date;
 import java.util.Set;
 
 import org.jclouds.javax.annotation.Nullable;
-import org.jclouds.openstack.v2_0.domain.Link;
-import org.jclouds.openstack.v2_0.domain.Resource;
 
 import com.google.common.base.Objects;
 import com.google.common.base.Objects.ToStringHelper;

apis/openstack-keystone/src/main/java/org/jclouds/openstack/v2_0/features/ExtensionApi.java

@@ -16,13 +16,13 @@
  * specific language governing permissions and limitations
  * under the License.
  */
-package org.jclouds.openstack.nova.v2_0.features;
+package org.jclouds.openstack.v2_0.features;
 
 import java.util.Set;
 import java.util.concurrent.TimeUnit;
 
 import org.jclouds.concurrent.Timeout;
-import org.jclouds.openstack.nova.v2_0.domain.Extension;
+import org.jclouds.openstack.v2_0.domain.Extension;
 
 /**
  * Provides asynchronous access to Extensions via their REST API.

apis/openstack-keystone/src/main/java/org/jclouds/openstack/v2_0/features/ExtensionAsyncApi.java

@@ -16,7 +16,7 @@
  * specific language governing permissions and limitations
  * under the License.
  */
-package org.jclouds.openstack.nova.v2_0.features;
+package org.jclouds.openstack.v2_0.features;
 
 import java.util.Set;
 
@@ -27,7 +27,7 @@ import javax.ws.rs.PathParam;
 import javax.ws.rs.core.MediaType;
 
 import org.jclouds.openstack.keystone.v2_0.filters.AuthenticateRequest;
-import org.jclouds.openstack.nova.v2_0.domain.Extension;
+import org.jclouds.openstack.v2_0.domain.Extension;
 import org.jclouds.rest.annotations.ExceptionParser;
 import org.jclouds.rest.annotations.RequestFilters;
 import org.jclouds.rest.annotations.SelectJson;

apis/openstack-keystone/src/main/java/org/jclouds/openstack/v2_0/functions/ExtensionToNameSpace.java

@@ -16,7 +16,7 @@
  * specific language governing permissions and limitations
  * under the License.
  */
-package org.jclouds.openstack.nova.v2_0.functions;
+package org.jclouds.openstack.v2_0.functions;
 
 import java.net.URI;
 
@@ -25,7 +25,7 @@ import javax.inject.Provider;
 import javax.inject.Singleton;
 import javax.ws.rs.core.UriBuilder;
 
-import org.jclouds.openstack.nova.v2_0.domain.Extension;
+import org.jclouds.openstack.v2_0.domain.Extension;
 
 import com.google.common.base.Function;
 

apis/openstack-keystone/src/main/java/org/jclouds/openstack/v2_0/functions/PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet.java

@@ -0,0 +1,88 @@
+/**
+ * Licensed to jclouds, Inc. (jclouds) under one or more
+ * contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  jclouds licenses this file
+ * to you 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.openstack.v2_0.functions;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import java.net.URI;
+import java.util.Set;
+
+import javax.inject.Inject;
+
+import org.jclouds.internal.ClassMethodArgsAndReturnVal;
+import org.jclouds.openstack.v2_0.domain.Extension;
+import org.jclouds.openstack.v2_0.predicates.ExtensionPredicates;
+import org.jclouds.rest.functions.ImplicitOptionalConverter;
+
+import com.google.common.base.Optional;
+import com.google.common.cache.LoadingCache;
+import com.google.common.collect.ImmutableMultimap;
+import com.google.common.collect.Iterables;
+import com.google.common.collect.Multimap;
+
+/**
+ * We use the annotation {@link org.jclouds.openstack.services.Extension} to
+ * bind a class that iimplements an extension API to an {@link Extension}.
+ * 
+ * @author Adrian Cole
+ * 
+ */
+public class PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet implements
+      ImplicitOptionalConverter {
+   private final LoadingCache<String, Set<? extends Extension>> extensions;
+   private final Multimap<URI, URI> aliases;
+   
+   @Inject
+   public PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet(
+         LoadingCache<String, Set<? extends Extension>> extensions,
+         Multimap<URI, URI> aliases) {
+      this.extensions = checkNotNull(extensions, "extensions");
+      this.aliases = aliases == null ? ImmutableMultimap.<URI, URI>of() : ImmutableMultimap.copyOf(aliases);
+   }
+
+   @Override
+   public Optional<Object> apply(ClassMethodArgsAndReturnVal input) {
+      Optional<org.jclouds.openstack.v2_0.services.Extension> ext = Optional.fromNullable(input.getClazz().getAnnotation(
+            org.jclouds.openstack.v2_0.services.Extension.class));
+      if (ext.isPresent()) {
+         URI namespace = URI.create(ext.get().namespace());
+         if (input.getArgs() == null || input.getArgs().length == 0) {
+	        if (Iterables.any(extensions.getUnchecked(""),
+	              ExtensionPredicates.namespaceOrAliasEquals(namespace, aliases.get(namespace))))
+	           return Optional.of(input.getReturnVal());
+	     } else if (input.getArgs() != null && input.getArgs().length == 1) {
+	        if (Iterables.any(extensions.getUnchecked(checkNotNull(input.getArgs()[0], "arg[0] in %s", input).toString()),
+	              ExtensionPredicates.namespaceOrAliasEquals(namespace, aliases.get(namespace))))
+	           return Optional.of(input.getReturnVal());
+         } else {
+            throw new RuntimeException(String.format("expecting zero or one args %s", input));
+         }
+         return Optional.absent();
+      } else {
+         // No extension annotation, should check whether to return absent
+	     return Optional.of(input.getReturnVal());
+      }
+   }
+
+   @Override
+   public String toString() {
+      return "presentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet()";
+   }
+
+}

apis/openstack-keystone/src/main/java/org/jclouds/openstack/v2_0/predicates/ExtensionPredicates.java

@@ -16,14 +16,14 @@
  * specific language governing permissions and limitations
  * under the License.
  */
-package org.jclouds.openstack.nova.v2_0.predicates;
+package org.jclouds.openstack.v2_0.predicates;
 
 import static com.google.common.base.Preconditions.checkNotNull;
 
 import java.net.URI;
 import java.util.Collection;
 
-import org.jclouds.openstack.nova.v2_0.domain.Extension;
+import org.jclouds.openstack.v2_0.domain.Extension;
 
 import com.google.common.base.Predicate;
 

apis/openstack-keystone/src/test/java/org/jclouds/openstack/v2_0/functions/ExtensionToNameSpaceTest.java

@@ -1,4 +1,4 @@
-package org.jclouds.openstack.nova.v2_0.functions;
+package org.jclouds.openstack.v2_0.functions;
 
 import static org.testng.Assert.assertEquals;
 
@@ -8,8 +8,7 @@ import javax.inject.Provider;
 import javax.ws.rs.core.UriBuilder;
 
 import org.jclouds.date.internal.SimpleDateFormatDateService;
-import org.jclouds.openstack.nova.v2_0.domain.Extension;
+import org.jclouds.openstack.v2_0.domain.Extension;
-import org.jclouds.openstack.nova.v2_0.extensions.ExtensionNamespaces;
 import org.testng.annotations.Test;
 
 import com.sun.jersey.api.uri.UriBuilderImpl;
@@ -39,6 +38,6 @@ public class ExtensionToNameSpaceTest {
       assertEquals(fn.apply(Extension.builder().alias("security_groups").name("SecurityGroups").namespace(
                URI.create("https://docs.openstack.org/ext/securitygroups/api/v1.1")).updated(
                new SimpleDateFormatDateService().iso8601SecondsDateParse("2011-07-21T00:00:00+00:00")).description(
-               "Security group support").build()), URI.create(ExtensionNamespaces.SECURITY_GROUPS));
+               "Security group support").build()), URI.create("http://docs.openstack.org/ext/securitygroups/api/v1.1"));
    }
 }

apis/openstack-keystone/src/test/java/org/jclouds/openstack/v2_0/functions/PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSetTest.java

@@ -1,4 +1,4 @@
-package org.jclouds.openstack.nova.v2_0.functions;
+package org.jclouds.openstack.v2_0.functions;
 
 import static org.testng.Assert.assertEquals;
 
@@ -9,10 +9,9 @@ import javax.inject.Named;
 
 import org.jclouds.date.internal.SimpleDateFormatDateService;
 import org.jclouds.internal.ClassMethodArgsAndReturnVal;
-import org.jclouds.openstack.nova.v2_0.domain.Extension;
-import org.jclouds.openstack.nova.v2_0.extensions.ExtensionNamespaces;
-import org.jclouds.openstack.nova.v2_0.extensions.KeyPairAsyncApi;
 import org.jclouds.openstack.v2_0.ServiceType;
+import org.jclouds.openstack.v2_0.domain.Extension;
+import org.jclouds.openstack.v2_0.functions.PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet;
 import org.jclouds.rest.annotations.Delegate;
 import org.testng.annotations.Test;
 
@@ -40,8 +39,8 @@ public class PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensio
             new SimpleDateFormatDateService().iso8601SecondsDateParse("2011-08-08T00:00:00+00:00")).description(
             "Keypair Support").build();
 
-   @org.jclouds.openstack.v2_0.services.Extension(of = ServiceType.COMPUTE, namespace = ExtensionNamespaces.KEYPAIRS)
+   @org.jclouds.openstack.v2_0.services.Extension(of = ServiceType.COMPUTE, namespace = "http://docs.openstack.org/ext/keypairs/api/v1.1")
-   static interface KeyPairIPAsyncApi {
+   static interface KeyPairAsyncApi {
 
    }
 
@@ -50,7 +49,7 @@ public class PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensio
             new SimpleDateFormatDateService().iso8601SecondsDateParse("2011-06-16T00:00:00+00:00")).description(
             "Floating IPs support").build();
 
-   @org.jclouds.openstack.v2_0.services.Extension(of = ServiceType.COMPUTE, namespace = ExtensionNamespaces.FLOATING_IPS)
+   @org.jclouds.openstack.v2_0.services.Extension(of = ServiceType.COMPUTE, namespace = "http://docs.openstack.org/ext/floating_ips/api/v1.1")
    static interface FloatingIPAsyncApi {
 
    }
@@ -68,27 +67,27 @@ public class PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensio
    ClassMethodArgsAndReturnVal getFloatingIPExtension() throws SecurityException, NoSuchMethodException {
       return ClassMethodArgsAndReturnVal.builder().clazz(FloatingIPAsyncApi.class).method(
                NovaAsyncApi.class.getDeclaredMethod("getFloatingIPExtensionForZone", String.class)).args(
-               new Object[] { "expectedzone" }).returnVal("foo").build();
+               new Object[] { "zone" }).returnVal("foo").build();
    }
 
    ClassMethodArgsAndReturnVal getKeyPairExtension() throws SecurityException, NoSuchMethodException {
       return ClassMethodArgsAndReturnVal.builder().clazz(KeyPairAsyncApi.class).method(
                NovaAsyncApi.class.getDeclaredMethod("getKeyPairExtensionForZone", String.class)).args(
-               new Object[] { "expectedzone" }).returnVal("foo").build();
+               new Object[] { "zone" }).returnVal("foo").build();
    }
 
    public void testPresentWhenExtensionsIncludeNamespaceFromAnnotationAbsentWhenNot() throws SecurityException, NoSuchMethodException {
 
-      assertEquals(whenExtensionsInclude(keypairs, floatingIps).apply(getFloatingIPExtension()), Optional.of("foo"));
+      assertEquals(whenExtensionsInZoneInclude("zone", keypairs, floatingIps).apply(getFloatingIPExtension()), Optional.of("foo"));
-      assertEquals(whenExtensionsInclude(keypairs, floatingIps).apply(getKeyPairExtension()), Optional.of("foo"));
+      assertEquals(whenExtensionsInZoneInclude("zone", keypairs, floatingIps).apply(getKeyPairExtension()), Optional.of("foo"));
-      assertEquals(whenExtensionsInclude(keypairs).apply(getFloatingIPExtension()), Optional.absent());
+      assertEquals(whenExtensionsInZoneInclude("zone", keypairs).apply(getFloatingIPExtension()), Optional.absent());
-      assertEquals(whenExtensionsInclude(floatingIps).apply(getKeyPairExtension()), Optional.absent());
+      assertEquals(whenExtensionsInZoneInclude("zone", floatingIps).apply(getKeyPairExtension()), Optional.absent());
    }
    
    public void testZoneWithoutExtensionsReturnsAbsent() throws SecurityException, NoSuchMethodException {
-      assertEquals(whenExtensionsInclude(floatingIps).apply(
+      assertEquals(whenExtensionsInZoneInclude("zone", floatingIps).apply(
                getFloatingIPExtension().toBuilder().args(new Object[] { "differentzone" }).build()), Optional.absent());
-      assertEquals(whenExtensionsInclude(keypairs).apply(
+      assertEquals(whenExtensionsInZoneInclude("zone", keypairs).apply(
                getKeyPairExtension().toBuilder().args(new Object[] { "differentzone" }).build()), Optional.absent());
    }
 
@@ -105,22 +104,22 @@ public class PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensio
       Multimap<URI, URI> aliases = ImmutableMultimap.of(keypairs.getNamespace(), keypairsWithDifferentNamespace
                .getNamespace());
 
-      assertEquals(whenExtensionsAndAliasesInclude(ImmutableSet.of(keypairsWithDifferentNamespace), aliases).apply(
+      assertEquals(whenExtensionsAndAliasesInZoneInclude("zone", ImmutableSet.of(keypairsWithDifferentNamespace), aliases).apply(
               getKeyPairExtension()), Optional.of("foo"));
-      assertEquals(whenExtensionsAndAliasesInclude(ImmutableSet.of(keypairsWithDifferentNamespace), aliases).apply(
+      assertEquals(whenExtensionsAndAliasesInZoneInclude("zone", ImmutableSet.of(keypairsWithDifferentNamespace), aliases).apply(
               getFloatingIPExtension()), Optional.absent());
 
    }
 
-   private PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet whenExtensionsInclude(
+   private PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet whenExtensionsInZoneInclude(
-            Extension... extensions) {
+            String zone, Extension... extensions) {
-      return whenExtensionsAndAliasesInclude(ImmutableSet.copyOf(extensions), ImmutableMultimap.<URI, URI> of());
+      return whenExtensionsAndAliasesInZoneInclude(zone, ImmutableSet.copyOf(extensions), ImmutableMultimap.<URI, URI> of());
    }
 
-   private PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet whenExtensionsAndAliasesInclude(
+   private PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet whenExtensionsAndAliasesInZoneInclude(
-            final Set<Extension> extensions, final Multimap<URI, URI> aliases) {
+            String zone, final Set<Extension> extensions, final Multimap<URI, URI> aliases) {
       final LoadingCache<String, Set<? extends Extension>> extensionsForZone = CacheBuilder.newBuilder().build(
-               CacheLoader.from(Functions.forMap(ImmutableMap.<String, Set<? extends Extension>>of("expectedzone", extensions, "differentzone",
+               CacheLoader.from(Functions.forMap(ImmutableMap.<String, Set<? extends Extension>>of(zone, extensions, "differentzone",
                         ImmutableSet.<Extension> of()))));
 
       PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet fn = Guice.createInjector(
@@ -135,7 +134,6 @@ public class PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensio
                   }
 
                   @Provides
-                  @Named("openstack.nova.extensions")
                   Multimap<URI, URI> getAliases() {
                      return aliases;
                   }

apis/openstack-keystone/src/test/java/org/jclouds/openstack/v2_0/predicates/ExtensionPredicatesTest.java

@@ -16,15 +16,15 @@
  * specific language governing permissions and limitations
  * under the License.
  */
-package org.jclouds.openstack.nova.v2_0.predicates;
+package org.jclouds.openstack.v2_0.predicates;
 
-import static org.jclouds.openstack.nova.v2_0.predicates.ExtensionPredicates.aliasEquals;
+import static org.jclouds.openstack.v2_0.predicates.ExtensionPredicates.aliasEquals;
-import static org.jclouds.openstack.nova.v2_0.predicates.ExtensionPredicates.namespaceEquals;
+import static org.jclouds.openstack.v2_0.predicates.ExtensionPredicates.namespaceEquals;
 
 import java.net.URI;
 
 import org.jclouds.date.internal.SimpleDateFormatDateService;
-import org.jclouds.openstack.nova.v2_0.domain.Extension;
+import org.jclouds.openstack.v2_0.domain.Extension;
 import org.testng.annotations.Test;
 
 /**

apis/openstack-nova/src/main/java/org/jclouds/openstack/nova/v2_0/NovaApi.java

@@ -39,10 +39,10 @@ import org.jclouds.openstack.nova.v2_0.extensions.SimpleTenantUsageApi;
 import org.jclouds.openstack.nova.v2_0.extensions.VirtualInterfaceApi;
 import org.jclouds.openstack.nova.v2_0.extensions.VolumeApi;
 import org.jclouds.openstack.nova.v2_0.extensions.VolumeTypeApi;
-import org.jclouds.openstack.nova.v2_0.features.ExtensionApi;
 import org.jclouds.openstack.nova.v2_0.features.FlavorApi;
 import org.jclouds.openstack.nova.v2_0.features.ImageApi;
 import org.jclouds.openstack.nova.v2_0.features.ServerApi;
+import org.jclouds.openstack.v2_0.features.ExtensionApi;
 import org.jclouds.rest.annotations.Delegate;
 import org.jclouds.rest.annotations.EndpointParam;
 

apis/openstack-nova/src/main/java/org/jclouds/openstack/nova/v2_0/NovaAsyncApi.java

@@ -37,10 +37,10 @@ import org.jclouds.openstack.nova.v2_0.extensions.SimpleTenantUsageAsyncApi;
 import org.jclouds.openstack.nova.v2_0.extensions.VirtualInterfaceAsyncApi;
 import org.jclouds.openstack.nova.v2_0.extensions.VolumeAsyncApi;
 import org.jclouds.openstack.nova.v2_0.extensions.VolumeTypeAsyncApi;
-import org.jclouds.openstack.nova.v2_0.features.ExtensionAsyncApi;
 import org.jclouds.openstack.nova.v2_0.features.FlavorAsyncApi;
 import org.jclouds.openstack.nova.v2_0.features.ImageAsyncApi;
 import org.jclouds.openstack.nova.v2_0.features.ServerAsyncApi;
+import org.jclouds.openstack.v2_0.features.ExtensionAsyncApi;
 import org.jclouds.rest.annotations.Delegate;
 import org.jclouds.rest.annotations.EndpointParam;
 

apis/openstack-nova/src/main/java/org/jclouds/openstack/nova/v2_0/config/NovaRestClientModule.java

@@ -18,6 +18,7 @@
  */
 package org.jclouds.openstack.nova.v2_0.config;
 
+import java.net.URI;
 import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.TimeUnit;
@@ -29,47 +30,48 @@ import org.jclouds.http.HttpErrorHandler;
 import org.jclouds.http.annotation.ClientError;
 import org.jclouds.http.annotation.Redirection;
 import org.jclouds.http.annotation.ServerError;
-import org.jclouds.openstack.nova.v2_0.NovaAsyncApi;
 import org.jclouds.openstack.nova.v2_0.NovaApi;
-import org.jclouds.openstack.nova.v2_0.domain.Extension;
+import org.jclouds.openstack.nova.v2_0.NovaAsyncApi;
-import org.jclouds.openstack.nova.v2_0.extensions.AdminActionsAsyncApi;
 import org.jclouds.openstack.nova.v2_0.extensions.AdminActionsApi;
-import org.jclouds.openstack.nova.v2_0.extensions.FlavorExtraSpecsAsyncApi;
+import org.jclouds.openstack.nova.v2_0.extensions.AdminActionsAsyncApi;
+import org.jclouds.openstack.nova.v2_0.extensions.ExtensionNamespaces;
 import org.jclouds.openstack.nova.v2_0.extensions.FlavorExtraSpecsApi;
-import org.jclouds.openstack.nova.v2_0.extensions.FloatingIPAsyncApi;
+import org.jclouds.openstack.nova.v2_0.extensions.FlavorExtraSpecsAsyncApi;
 import org.jclouds.openstack.nova.v2_0.extensions.FloatingIPApi;
-import org.jclouds.openstack.nova.v2_0.extensions.HostAdministrationAsyncApi;
+import org.jclouds.openstack.nova.v2_0.extensions.FloatingIPAsyncApi;
 import org.jclouds.openstack.nova.v2_0.extensions.HostAdministrationApi;
-import org.jclouds.openstack.nova.v2_0.extensions.HostAggregateAsyncApi;
+import org.jclouds.openstack.nova.v2_0.extensions.HostAdministrationAsyncApi;
 import org.jclouds.openstack.nova.v2_0.extensions.HostAggregateApi;
-import org.jclouds.openstack.nova.v2_0.extensions.KeyPairAsyncApi;
+import org.jclouds.openstack.nova.v2_0.extensions.HostAggregateAsyncApi;
 import org.jclouds.openstack.nova.v2_0.extensions.KeyPairApi;
-import org.jclouds.openstack.nova.v2_0.extensions.QuotaAsyncApi;
+import org.jclouds.openstack.nova.v2_0.extensions.KeyPairAsyncApi;
-import org.jclouds.openstack.nova.v2_0.extensions.QuotaClassAsyncApi;
-import org.jclouds.openstack.nova.v2_0.extensions.QuotaClassApi;
 import org.jclouds.openstack.nova.v2_0.extensions.QuotaApi;
-import org.jclouds.openstack.nova.v2_0.extensions.SecurityGroupAsyncApi;
+import org.jclouds.openstack.nova.v2_0.extensions.QuotaAsyncApi;
+import org.jclouds.openstack.nova.v2_0.extensions.QuotaClassApi;
+import org.jclouds.openstack.nova.v2_0.extensions.QuotaClassAsyncApi;
 import org.jclouds.openstack.nova.v2_0.extensions.SecurityGroupApi;
-import org.jclouds.openstack.nova.v2_0.extensions.ServerWithSecurityGroupsAsyncApi;
+import org.jclouds.openstack.nova.v2_0.extensions.SecurityGroupAsyncApi;
 import org.jclouds.openstack.nova.v2_0.extensions.ServerWithSecurityGroupsApi;
-import org.jclouds.openstack.nova.v2_0.extensions.SimpleTenantUsageAsyncApi;
+import org.jclouds.openstack.nova.v2_0.extensions.ServerWithSecurityGroupsAsyncApi;
 import org.jclouds.openstack.nova.v2_0.extensions.SimpleTenantUsageApi;
-import org.jclouds.openstack.nova.v2_0.extensions.VirtualInterfaceAsyncApi;
+import org.jclouds.openstack.nova.v2_0.extensions.SimpleTenantUsageAsyncApi;
 import org.jclouds.openstack.nova.v2_0.extensions.VirtualInterfaceApi;
-import org.jclouds.openstack.nova.v2_0.extensions.VolumeAsyncApi;
+import org.jclouds.openstack.nova.v2_0.extensions.VirtualInterfaceAsyncApi;
 import org.jclouds.openstack.nova.v2_0.extensions.VolumeApi;
-import org.jclouds.openstack.nova.v2_0.extensions.VolumeTypeAsyncApi;
+import org.jclouds.openstack.nova.v2_0.extensions.VolumeAsyncApi;
 import org.jclouds.openstack.nova.v2_0.extensions.VolumeTypeApi;
-import org.jclouds.openstack.nova.v2_0.features.ExtensionAsyncApi;
+import org.jclouds.openstack.nova.v2_0.extensions.VolumeTypeAsyncApi;
-import org.jclouds.openstack.nova.v2_0.features.ExtensionApi;
-import org.jclouds.openstack.nova.v2_0.features.FlavorAsyncApi;
 import org.jclouds.openstack.nova.v2_0.features.FlavorApi;
-import org.jclouds.openstack.nova.v2_0.features.ImageAsyncApi;
+import org.jclouds.openstack.nova.v2_0.features.FlavorAsyncApi;
 import org.jclouds.openstack.nova.v2_0.features.ImageApi;
-import org.jclouds.openstack.nova.v2_0.features.ServerAsyncApi;
+import org.jclouds.openstack.nova.v2_0.features.ImageAsyncApi;
 import org.jclouds.openstack.nova.v2_0.features.ServerApi;
-import org.jclouds.openstack.nova.v2_0.functions.PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet;
+import org.jclouds.openstack.nova.v2_0.features.ServerAsyncApi;
 import org.jclouds.openstack.nova.v2_0.handlers.NovaErrorHandler;
+import org.jclouds.openstack.v2_0.domain.Extension;
+import org.jclouds.openstack.v2_0.features.ExtensionApi;
+import org.jclouds.openstack.v2_0.features.ExtensionAsyncApi;
+import org.jclouds.openstack.v2_0.functions.PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet;
 import org.jclouds.rest.ConfiguresRestClient;
 import org.jclouds.rest.config.RestClientModule;
 import org.jclouds.rest.functions.ImplicitOptionalConverter;
@@ -78,6 +80,8 @@ import com.google.common.cache.CacheBuilder;
 import com.google.common.cache.CacheLoader;
 import com.google.common.cache.LoadingCache;
 import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableMultimap;
+import com.google.common.collect.Multimap;
 import com.google.common.reflect.TypeToken;
 import com.google.inject.Provides;
 
@@ -122,22 +126,54 @@ public class NovaRestClientModule<S extends NovaApi, A extends NovaAsyncApi> ext
    @Override
    protected void configure() {
       install(new NovaParserModule());
-      bind(ImplicitOptionalConverter.class).to(
+      bind(ImplicitOptionalConverter.class).to(PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet.class);
-            PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet.class);
       super.configure();
    }
+   
+   @Provides
+   @Singleton
+   public Multimap<URI, URI> aliases() {
+       return ImmutableMultimap.<URI, URI>builder()
+          .put(URI.create(ExtensionNamespaces.SECURITY_GROUPS),
+               URI.create("http://docs.openstack.org/compute/ext/securitygroups/api/v1.1"))
+          .put(URI.create(ExtensionNamespaces.FLOATING_IPS),
+               URI.create("http://docs.openstack.org/compute/ext/floating_ips/api/v1.1"))
+          .put(URI.create(ExtensionNamespaces.KEYPAIRS),
+               URI.create("http://docs.openstack.org/compute/ext/keypairs/api/v1.1"))
+          .put(URI.create(ExtensionNamespaces.SIMPLE_TENANT_USAGE),
+               URI.create("http://docs.openstack.org/compute/ext/os-simple-tenant-usage/api/v1.1"))
+          .put(URI.create(ExtensionNamespaces.HOSTS),
+               URI.create("http://docs.openstack.org/compute/ext/hosts/api/v1.1"))
+          .put(URI.create(ExtensionNamespaces.VOLUMES),
+               URI.create("http://docs.openstack.org/compute/ext/volumes/api/v1.1"))
+          .put(URI.create(ExtensionNamespaces.VIRTUAL_INTERFACES),
+               URI.create("http://docs.openstack.org/compute/ext/virtual_interfaces/api/v1.1"))
+          .put(URI.create(ExtensionNamespaces.CREATESERVEREXT),
+               URI.create("http://docs.openstack.org/compute/ext/createserverext/api/v1.1"))
+          .put(URI.create(ExtensionNamespaces.ADMIN_ACTIONS),
+               URI.create("http://docs.openstack.org/compute/ext/admin-actions/api/v1.1"))
+          .put(URI.create(ExtensionNamespaces.AGGREGATES),
+               URI.create("http://docs.openstack.org/compute/ext/aggregates/api/v1.1"))
+          .put(URI.create(ExtensionNamespaces.FLAVOR_EXTRA_SPECS),
+               URI.create("http://docs.openstack.org/compute/ext/flavor_extra_specs/api/v1.1"))
+          .put(URI.create(ExtensionNamespaces.QUOTAS),
+               URI.create("http://docs.openstack.org/compute/ext/quotas-sets/api/v1.1"))
+          .put(URI.create(ExtensionNamespaces.QUOTA_CLASSES),
+               URI.create("http://docs.openstack.org/compute/ext/quota-classes-sets/api/v1.1"))
+          .put(URI.create(ExtensionNamespaces.VOLUME_TYPES),
+               URI.create("http://docs.openstack.org/compute/ext/volume_types/api/v1.1"))
+          .build();
+   }
 
    @Provides
    @Singleton
    public LoadingCache<String, Set<? extends Extension>> provideExtensionsByZone(final Provider<NovaApi> novaApi) {
       return CacheBuilder.newBuilder().expireAfterWrite(23, TimeUnit.HOURS)
             .build(new CacheLoader<String, Set<? extends Extension>>() {
-
                @Override
                public Set<? extends Extension> load(String key) throws Exception {
                   return novaApi.get().getExtensionApiForZone(key).listExtensions();
                }
-
             });
    }
 

apis/openstack-nova/src/main/java/org/jclouds/openstack/nova/v2_0/extensions/FloatingIPAsyncApi.java

@@ -31,8 +31,8 @@ import javax.ws.rs.core.MediaType;
 
 import org.jclouds.openstack.keystone.v2_0.filters.AuthenticateRequest;
 import org.jclouds.openstack.nova.v2_0.domain.FloatingIP;
-import org.jclouds.openstack.nova.v2_0.features.ExtensionAsyncApi;
 import org.jclouds.openstack.v2_0.ServiceType;
+import org.jclouds.openstack.v2_0.features.ExtensionAsyncApi;
 import org.jclouds.openstack.v2_0.services.Extension;
 import org.jclouds.rest.annotations.ExceptionParser;
 import org.jclouds.rest.annotations.Payload;

apis/openstack-nova/src/main/java/org/jclouds/openstack/nova/v2_0/extensions/KeyPairAsyncApi.java

@@ -32,8 +32,8 @@ import javax.ws.rs.core.MediaType;
 
 import org.jclouds.openstack.keystone.v2_0.filters.AuthenticateRequest;
 import org.jclouds.openstack.nova.v2_0.domain.KeyPair;
-import org.jclouds.openstack.nova.v2_0.features.ExtensionAsyncApi;
 import org.jclouds.openstack.v2_0.ServiceType;
+import org.jclouds.openstack.v2_0.features.ExtensionAsyncApi;
 import org.jclouds.openstack.v2_0.services.Extension;
 import org.jclouds.rest.annotations.ExceptionParser;
 import org.jclouds.rest.annotations.Payload;

apis/openstack-nova/src/main/java/org/jclouds/openstack/nova/v2_0/functions/PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet.java

@@ -1,113 +0,0 @@
-/**
- * Licensed to jclouds, Inc. (jclouds) under one or more
- * contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  jclouds licenses this file
- * to you 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.openstack.nova.v2_0.functions;
-
-import static com.google.common.base.Preconditions.checkNotNull;
-import static com.google.common.base.Preconditions.checkState;
-
-import java.net.URI;
-import java.util.Set;
-
-import javax.inject.Inject;
-import javax.inject.Named;
-import javax.inject.Singleton;
-
-import org.jclouds.internal.ClassMethodArgsAndReturnVal;
-import org.jclouds.openstack.nova.v2_0.domain.Extension;
-import org.jclouds.openstack.nova.v2_0.extensions.ExtensionNamespaces;
-import org.jclouds.openstack.nova.v2_0.predicates.ExtensionPredicates;
-import org.jclouds.rest.functions.ImplicitOptionalConverter;
-
-import com.google.common.base.Optional;
-import com.google.common.cache.LoadingCache;
-import com.google.common.collect.ImmutableMultimap;
-import com.google.common.collect.Iterables;
-import com.google.common.collect.Multimap;
-
-/**
- * We use the annotation {@link org.jclouds.openstack.services.Extension} to
- * bind a class that is an extension to an extension found in the
- * {@link org.jclouds.openstack.nova.v2_0.features.ExtensionApi#listExtensions} call.
- * 
- * @author Adrian Cole
- * 
- */
-@Singleton
-public class PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet implements
-      ImplicitOptionalConverter {
-   private final LoadingCache<String, Set<? extends Extension>> extensions;
-
-   @com.google.inject.Inject(optional=true)
-   @Named("openstack.nova.extensions")
-   Multimap<URI, URI> aliases = ImmutableMultimap.<URI, URI>builder()
-      .put(URI.create(ExtensionNamespaces.SECURITY_GROUPS),
-           URI.create("http://docs.openstack.org/compute/ext/securitygroups/api/v1.1"))
-      .put(URI.create(ExtensionNamespaces.FLOATING_IPS),
-           URI.create("http://docs.openstack.org/compute/ext/floating_ips/api/v1.1"))
-      .put(URI.create(ExtensionNamespaces.KEYPAIRS),
-           URI.create("http://docs.openstack.org/compute/ext/keypairs/api/v1.1"))
-      .put(URI.create(ExtensionNamespaces.SIMPLE_TENANT_USAGE),
-           URI.create("http://docs.openstack.org/compute/ext/os-simple-tenant-usage/api/v1.1"))
-      .put(URI.create(ExtensionNamespaces.HOSTS),
-           URI.create("http://docs.openstack.org/compute/ext/hosts/api/v1.1"))
-      .put(URI.create(ExtensionNamespaces.VOLUMES),
-           URI.create("http://docs.openstack.org/compute/ext/volumes/api/v1.1"))
-      .put(URI.create(ExtensionNamespaces.VIRTUAL_INTERFACES),
-           URI.create("http://docs.openstack.org/compute/ext/virtual_interfaces/api/v1.1"))
-      .put(URI.create(ExtensionNamespaces.CREATESERVEREXT),
-           URI.create("http://docs.openstack.org/compute/ext/createserverext/api/v1.1"))
-      .put(URI.create(ExtensionNamespaces.ADMIN_ACTIONS),
-           URI.create("http://docs.openstack.org/compute/ext/admin-actions/api/v1.1"))
-      .put(URI.create(ExtensionNamespaces.AGGREGATES),
-           URI.create("http://docs.openstack.org/compute/ext/aggregates/api/v1.1"))
-      .put(URI.create(ExtensionNamespaces.FLAVOR_EXTRA_SPECS),
-           URI.create("http://docs.openstack.org/compute/ext/flavor_extra_specs/api/v1.1"))
-      .put(URI.create(ExtensionNamespaces.QUOTAS),
-           URI.create("http://docs.openstack.org/compute/ext/quotas-sets/api/v1.1"))
-      .put(URI.create(ExtensionNamespaces.QUOTA_CLASSES),
-           URI.create("http://docs.openstack.org/compute/ext/quota-classes-sets/api/v1.1"))
-      .put(URI.create(ExtensionNamespaces.VOLUME_TYPES),
-           URI.create("http://docs.openstack.org/compute/ext/volume_types/api/v1.1"))
-      .build();
-   
-   @Inject
-   public PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet(
-         LoadingCache<String, Set<? extends Extension>> extensions) {
-      this.extensions = checkNotNull(extensions, "extensions");
-   }
-
-   @Override
-   public Optional<Object> apply(ClassMethodArgsAndReturnVal input) {
-      Optional<org.jclouds.openstack.v2_0.services.Extension> ext = Optional.fromNullable(input.getClazz().getAnnotation(
-            org.jclouds.openstack.v2_0.services.Extension.class));
-      if (ext.isPresent()) {
-         checkState(input.getArgs() != null && input.getArgs().length == 1, "expecting an arg %s", input);
-         URI namespace = URI.create(ext.get().namespace());
-         if (Iterables.any(extensions.getUnchecked(checkNotNull(input.getArgs()[0], "arg[0] in %s", input).toString()),
-               ExtensionPredicates.namespaceOrAliasEquals(namespace, aliases.get(namespace))))
-            return Optional.of(input.getReturnVal());
-      }
-      return Optional.absent();
-   }
-
-   public String toString() {
-      return "presentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet()";
-   }
-
-}

apis/openstack-nova/src/test/java/org/jclouds/openstack/nova/v2_0/extensions/AdminActionsApiLiveTest.java

@@ -27,11 +27,11 @@ import org.jclouds.http.HttpResponseException;
 import org.jclouds.openstack.nova.v2_0.domain.BackupType;
 import org.jclouds.openstack.nova.v2_0.domain.Image;
 import org.jclouds.openstack.nova.v2_0.domain.Server.Status;
-import org.jclouds.openstack.nova.v2_0.features.ExtensionApi;
 import org.jclouds.openstack.nova.v2_0.features.ImageApi;
 import org.jclouds.openstack.nova.v2_0.features.ServerApi;
 import org.jclouds.openstack.nova.v2_0.internal.BaseNovaApiLiveTest;
 import org.jclouds.openstack.nova.v2_0.options.CreateBackupOfServerOptions;
+import org.jclouds.openstack.v2_0.features.ExtensionApi;
 import org.testng.annotations.AfterGroups;
 import org.testng.annotations.AfterMethod;
 import org.testng.annotations.BeforeGroups;

apis/openstack-nova/src/test/java/org/jclouds/openstack/nova/v2_0/features/ExtensionApiLiveTest.java

@@ -23,8 +23,9 @@ import static org.testng.Assert.assertTrue;
 
 import java.util.Set;
 
-import org.jclouds.openstack.nova.v2_0.domain.Extension;
 import org.jclouds.openstack.nova.v2_0.internal.BaseNovaApiLiveTest;
+import org.jclouds.openstack.v2_0.domain.Extension;
+import org.jclouds.openstack.v2_0.features.ExtensionApi;
 import org.testng.annotations.Test;
 
 /**

apis/openstack-nova/src/test/java/org/jclouds/openstack/nova/v2_0/parse/ParseExtensionListNormalTest.java

@@ -28,7 +28,7 @@ import org.jclouds.date.internal.SimpleDateFormatDateService;
 import org.jclouds.json.BaseSetParserTest;
 import org.jclouds.json.config.GsonModule;
 import org.jclouds.openstack.nova.v2_0.config.NovaParserModule;
-import org.jclouds.openstack.nova.v2_0.domain.Extension;
+import org.jclouds.openstack.v2_0.domain.Extension;
 import org.jclouds.rest.annotations.SelectJson;
 import org.testng.annotations.Test;
 

apis/openstack-nova/src/test/java/org/jclouds/openstack/nova/v2_0/parse/ParseExtensionListTest.java

@@ -28,7 +28,7 @@ import org.jclouds.date.internal.SimpleDateFormatDateService;
 import org.jclouds.json.BaseSetParserTest;
 import org.jclouds.json.config.GsonModule;
 import org.jclouds.openstack.nova.v2_0.config.NovaParserModule;
-import org.jclouds.openstack.nova.v2_0.domain.Extension;
+import org.jclouds.openstack.v2_0.domain.Extension;
 import org.jclouds.openstack.v2_0.domain.Link;
 import org.jclouds.openstack.v2_0.domain.Link.Relation;
 import org.jclouds.rest.annotations.SelectJson;

apis/openstack-nova/src/test/java/org/jclouds/openstack/nova/v2_0/parse/ParseExtensionTest.java

@@ -27,7 +27,7 @@ import org.jclouds.date.internal.SimpleDateFormatDateService;
 import org.jclouds.json.BaseItemParserTest;
 import org.jclouds.json.config.GsonModule;
 import org.jclouds.openstack.nova.v2_0.config.NovaParserModule;
-import org.jclouds.openstack.nova.v2_0.domain.Extension;
+import org.jclouds.openstack.v2_0.domain.Extension;
 import org.jclouds.openstack.v2_0.domain.Link;
 import org.jclouds.openstack.v2_0.domain.Link.Relation;
 import org.jclouds.rest.annotations.SelectJson;

labs/openstack-glance/src/main/java/org/jclouds/openstack/glance/v1_0/GlanceApi.java

@@ -26,6 +26,7 @@ import org.jclouds.javax.annotation.Nullable;
 import org.jclouds.location.Region;
 import org.jclouds.location.functions.RegionToEndpoint;
 import org.jclouds.openstack.glance.v1_0.features.ImageApi;
+import org.jclouds.openstack.v2_0.features.ExtensionApi;
 import org.jclouds.rest.annotations.Delegate;
 import org.jclouds.rest.annotations.EndpointParam;
 
@@ -49,6 +50,13 @@ public interface GlanceApi {
    @Region
    Set<String> getConfiguredRegions();
 
+   /**
+    * Provides synchronous access to Extension features.
+    */
+   @Delegate
+   ExtensionApi getExtensionApiForRegion(
+         @EndpointParam(parser = RegionToEndpoint.class) @Nullable String region);
+
    /**
     * Provides synchronous access to Image features.
     */

labs/openstack-glance/src/main/java/org/jclouds/openstack/glance/v1_0/GlanceAsyncApi.java

@@ -24,6 +24,7 @@ import org.jclouds.javax.annotation.Nullable;
 import org.jclouds.location.Region;
 import org.jclouds.location.functions.RegionToEndpoint;
 import org.jclouds.openstack.glance.v1_0.features.ImageAsyncApi;
+import org.jclouds.openstack.v2_0.features.ExtensionAsyncApi;
 import org.jclouds.rest.annotations.Delegate;
 import org.jclouds.rest.annotations.EndpointParam;
 
@@ -46,6 +47,13 @@ public interface GlanceAsyncApi {
    @Region
    Set<String> getConfiguredRegions();
 
+   /**
+    * Provides asynchronous access to Extension features.
+    */
+   @Delegate
+   ExtensionAsyncApi getExtensionApiForRegion(
+         @EndpointParam(parser = RegionToEndpoint.class) @Nullable String region);
+
    /**
     * Provides asynchronous access to Image features.
     */

labs/openstack-glance/src/main/java/org/jclouds/openstack/glance/v1_0/config/GlanceRestClientModule.java

@@ -18,7 +18,13 @@
  */
 package org.jclouds.openstack.glance.v1_0.config;
 
+import java.net.URI;
 import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.TimeUnit;
+
+import javax.inject.Provider;
+import javax.inject.Singleton;
 
 import org.jclouds.http.HttpErrorHandler;
 import org.jclouds.http.annotation.ClientError;
@@ -26,15 +32,27 @@ import org.jclouds.http.annotation.Redirection;
 import org.jclouds.http.annotation.ServerError;
 import org.jclouds.json.config.GsonModule.DateAdapter;
 import org.jclouds.json.config.GsonModule.Iso8601DateAdapter;
-import org.jclouds.openstack.glance.v1_0.GlanceAsyncApi;
 import org.jclouds.openstack.glance.v1_0.GlanceApi;
-import org.jclouds.openstack.glance.v1_0.features.ImageAsyncApi;
+import org.jclouds.openstack.glance.v1_0.GlanceAsyncApi;
 import org.jclouds.openstack.glance.v1_0.features.ImageApi;
+import org.jclouds.openstack.glance.v1_0.features.ImageAsyncApi;
 import org.jclouds.openstack.glance.v1_0.handlers.GlanceErrorHandler;
+import org.jclouds.openstack.v2_0.domain.Extension;
+import org.jclouds.openstack.v2_0.features.ExtensionApi;
+import org.jclouds.openstack.v2_0.features.ExtensionAsyncApi;
+import org.jclouds.openstack.v2_0.functions.PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet;
 import org.jclouds.rest.ConfiguresRestClient;
 import org.jclouds.rest.config.RestClientModule;
+import org.jclouds.rest.functions.ImplicitOptionalConverter;
 
+import com.google.common.cache.CacheBuilder;
+import com.google.common.cache.CacheLoader;
+import com.google.common.cache.LoadingCache;
 import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableMultimap;
+import com.google.common.collect.Multimap;
+import com.google.common.reflect.TypeToken;
+import com.google.inject.Provides;
 
 /**
  * Configures the Glance connection.
@@ -42,22 +60,47 @@ import com.google.common.collect.ImmutableMap;
  * @author Adrian Cole
  */
 @ConfiguresRestClient
-public class GlanceRestClientModule extends RestClientModule<GlanceApi, GlanceAsyncApi> {
+public class GlanceRestClientModule<S extends GlanceApi, A extends GlanceAsyncApi> extends RestClientModule<S, A> {
 
    public static final Map<Class<?>, Class<?>> DELEGATE_MAP = ImmutableMap.<Class<?>, Class<?>> builder()
+         .put(ExtensionApi.class, ExtensionAsyncApi.class)
          .put(ImageApi.class, ImageAsyncApi.class)
          .build();
 
    public GlanceRestClientModule() {
-      super(DELEGATE_MAP);
+      super(TypeToken.class.cast(TypeToken.of(GlanceApi.class)), TypeToken.class.cast(TypeToken.of(GlanceAsyncApi.class)), DELEGATE_MAP);
+   }
+
+   protected GlanceRestClientModule(TypeToken<S> syncClientType, TypeToken<A> asyncClientType, Map<Class<?>, Class<?>> sync2Async) {
+      super(syncClientType, asyncClientType, sync2Async);
    }
 
    @Override
    protected void configure() {
       bind(DateAdapter.class).to(Iso8601DateAdapter.class);
+      bind(ImplicitOptionalConverter.class).to(PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet.class);
       super.configure();
    }
    
+   @Provides
+   @Singleton
+   public Multimap<URI, URI> aliases() {
+       return ImmutableMultimap.<URI, URI>builder()
+          .build();
+   }
+
+   @Provides
+   @Singleton
+   public LoadingCache<String, Set<? extends Extension>> provideExtensionsByZone(final Provider<GlanceApi> glanceApi) {
+      return CacheBuilder.newBuilder().expireAfterWrite(23, TimeUnit.HOURS)
+            .build(new CacheLoader<String, Set<? extends Extension>>() {
+               @Override
+               public Set<? extends Extension> load(String key) throws Exception {
+                  return glanceApi.get().getExtensionApiForRegion(key).listExtensions();
+               }
+            });
+   }
+   
    @Override
    protected void bindErrorHandlers() {
       bind(HttpErrorHandler.class).annotatedWith(Redirection.class).to(GlanceErrorHandler.class);

labs/openstack-quantum/src/main/java/org/jclouds/openstack/quantum/v1_0/QuantumApi.java

@@ -28,8 +28,10 @@ import org.jclouds.concurrent.Timeout;
 import org.jclouds.javax.annotation.Nullable;
 import org.jclouds.location.Region;
 import org.jclouds.location.functions.RegionToEndpoint;
+import org.jclouds.location.functions.ZoneToEndpoint;
 import org.jclouds.openstack.quantum.v1_0.features.NetworkApi;
 import org.jclouds.openstack.quantum.v1_0.features.PortApi;
+import org.jclouds.openstack.v2_0.features.ExtensionApi;
 import org.jclouds.rest.annotations.Delegate;
 import org.jclouds.rest.annotations.EndpointParam;
 
@@ -52,6 +54,13 @@ public interface QuantumApi {
    @Region
    Set<String> getConfiguredRegions();
 
+   /**
+    * Provides synchronous access to Extension features.
+    */
+   @Delegate
+   ExtensionApi getExtensionApiForRegion(
+         @EndpointParam(parser = RegionToEndpoint.class) @Nullable String region);
+
    /**
     * Provides synchronous access to Network features.
     */

labs/openstack-quantum/src/main/java/org/jclouds/openstack/quantum/v1_0/QuantumAsyncApi.java

@@ -28,6 +28,7 @@ import org.jclouds.location.Region;
 import org.jclouds.location.functions.RegionToEndpoint;
 import org.jclouds.openstack.quantum.v1_0.features.NetworkAsyncApi;
 import org.jclouds.openstack.quantum.v1_0.features.PortAsyncApi;
+import org.jclouds.openstack.v2_0.features.ExtensionAsyncApi;
 import org.jclouds.rest.annotations.Delegate;
 import org.jclouds.rest.annotations.EndpointParam;
 
@@ -50,6 +51,13 @@ public interface QuantumAsyncApi {
    @Region
    Set<String> getConfiguredRegions();
 
+   /**
+    * Provides asynchronous access to Extension features.
+    */
+   @Delegate
+   ExtensionAsyncApi getExtensionApiForRegion(
+         @EndpointParam(parser = RegionToEndpoint.class) @Nullable String region);
+
    /**
     * Provides asynchronous access to Network features.
     */

labs/openstack-quantum/src/main/java/org/jclouds/openstack/quantum/v1_0/config/QuantumRestClientModule.java

@@ -18,7 +18,13 @@
  */
 package org.jclouds.openstack.quantum.v1_0.config;
 
+import java.net.URI;
 import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.TimeUnit;
+
+import javax.inject.Provider;
+import javax.inject.Singleton;
 
 import org.jclouds.http.HttpErrorHandler;
 import org.jclouds.http.annotation.ClientError;
@@ -26,17 +32,29 @@ import org.jclouds.http.annotation.Redirection;
 import org.jclouds.http.annotation.ServerError;
 import org.jclouds.json.config.GsonModule.DateAdapter;
 import org.jclouds.json.config.GsonModule.Iso8601DateAdapter;
-import org.jclouds.openstack.quantum.v1_0.QuantumAsyncApi;
 import org.jclouds.openstack.quantum.v1_0.QuantumApi;
-import org.jclouds.openstack.quantum.v1_0.features.NetworkAsyncApi;
+import org.jclouds.openstack.quantum.v1_0.QuantumAsyncApi;
 import org.jclouds.openstack.quantum.v1_0.features.NetworkApi;
-import org.jclouds.openstack.quantum.v1_0.features.PortAsyncApi;
+import org.jclouds.openstack.quantum.v1_0.features.NetworkAsyncApi;
 import org.jclouds.openstack.quantum.v1_0.features.PortApi;
+import org.jclouds.openstack.quantum.v1_0.features.PortAsyncApi;
 import org.jclouds.openstack.quantum.v1_0.handlers.QuantumErrorHandler;
+import org.jclouds.openstack.v2_0.domain.Extension;
+import org.jclouds.openstack.v2_0.features.ExtensionApi;
+import org.jclouds.openstack.v2_0.features.ExtensionAsyncApi;
+import org.jclouds.openstack.v2_0.functions.PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet;
 import org.jclouds.rest.ConfiguresRestClient;
 import org.jclouds.rest.config.RestClientModule;
+import org.jclouds.rest.functions.ImplicitOptionalConverter;
 
+import com.google.common.cache.CacheBuilder;
+import com.google.common.cache.CacheLoader;
+import com.google.common.cache.LoadingCache;
 import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableMultimap;
+import com.google.common.collect.Multimap;
+import com.google.common.reflect.TypeToken;
+import com.google.inject.Provides;
 
 /**
  * Configures the Quantum connection.
@@ -44,23 +62,48 @@ import com.google.common.collect.ImmutableMap;
  * @author Adam Lowe
  */
 @ConfiguresRestClient
-public class QuantumRestClientModule extends RestClientModule<QuantumApi, QuantumAsyncApi> {
+public class QuantumRestClientModule<S extends QuantumApi, A extends QuantumAsyncApi> extends RestClientModule<S, A> {
 
    public static final Map<Class<?>, Class<?>> DELEGATE_MAP = ImmutableMap.<Class<?>, Class<?>> builder()
+         .put(ExtensionApi.class, ExtensionAsyncApi.class)
          .put(NetworkApi.class, NetworkAsyncApi.class)
          .put(PortApi.class, PortAsyncApi.class)
          .build();
 
    public QuantumRestClientModule() {
-      super(DELEGATE_MAP);
+      super(TypeToken.class.cast(TypeToken.of(QuantumApi.class)), TypeToken.class.cast(TypeToken.of(QuantumAsyncApi.class)), DELEGATE_MAP);
+   }
+
+   protected QuantumRestClientModule(TypeToken<S> syncClientType, TypeToken<A> asyncClientType, Map<Class<?>, Class<?>> sync2Async) {
+      super(syncClientType, asyncClientType, sync2Async);
    }
    
    @Override
    protected void configure() {
       bind(DateAdapter.class).to(Iso8601DateAdapter.class);
+      bind(ImplicitOptionalConverter.class).to(PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet.class);
       super.configure();
    }
    
+   @Provides
+   @Singleton
+   public Multimap<URI, URI> aliases() {
+       return ImmutableMultimap.<URI, URI>builder()
+          .build();
+   }
+
+   @Provides
+   @Singleton
+   public LoadingCache<String, Set<? extends Extension>> provideExtensionsByZone(final Provider<QuantumApi> quantumApi) {
+      return CacheBuilder.newBuilder().expireAfterWrite(23, TimeUnit.HOURS)
+            .build(new CacheLoader<String, Set<? extends Extension>>() {
+               @Override
+               public Set<? extends Extension> load(String key) throws Exception {
+                  return quantumApi.get().getExtensionApiForRegion(key).listExtensions();
+               }
+            });
+   }
+   
    @Override
    protected void bindErrorHandlers() {
       bind(HttpErrorHandler.class).annotatedWith(Redirection.class).to(QuantumErrorHandler.class);

labs/openstack-swift/src/main/java/org/jclouds/openstack/swift/v1/SwiftApi.java

@@ -28,6 +28,7 @@ import org.jclouds.location.functions.RegionToEndpoint;
 import org.jclouds.openstack.swift.v1.features.AccountApi;
 import org.jclouds.openstack.swift.v1.features.ContainerApi;
 import org.jclouds.openstack.swift.v1.features.ObjectApi;
+import org.jclouds.openstack.v2_0.features.ExtensionApi;
 import org.jclouds.rest.annotations.Delegate;
 import org.jclouds.rest.annotations.EndpointParam;
 
@@ -51,6 +52,13 @@ public interface SwiftApi {
    @Region
    Set<String> getConfiguredRegions();
 
+   /**
+    * Provides synchronous access to Extension features.
+    */
+   @Delegate
+   ExtensionApi getExtensionApiForRegion(
+         @EndpointParam(parser = RegionToEndpoint.class) @Nullable String region);
+
    /**
     * Provides synchronous access to Account features.
     */

labs/openstack-swift/src/main/java/org/jclouds/openstack/swift/v1/SwiftAsyncApi.java

@@ -26,6 +26,7 @@ import org.jclouds.location.functions.RegionToEndpoint;
 import org.jclouds.openstack.swift.v1.features.AccountAsyncApi;
 import org.jclouds.openstack.swift.v1.features.ContainerAsyncApi;
 import org.jclouds.openstack.swift.v1.features.ObjectAsyncApi;
+import org.jclouds.openstack.v2_0.features.ExtensionAsyncApi;
 import org.jclouds.rest.annotations.Delegate;
 import org.jclouds.rest.annotations.EndpointParam;
 
@@ -48,6 +49,13 @@ public interface SwiftAsyncApi {
    @Region
    Set<String> getConfiguredRegions();
 
+   /**
+    * Provides asynchronous access to Extension features.
+    */
+   @Delegate
+   ExtensionAsyncApi getExtensionApiForRegion(
+         @EndpointParam(parser = RegionToEndpoint.class) @Nullable String region);
+
    /**
     * Provides asynchronous access to Account features.
     */

labs/openstack-swift/src/main/java/org/jclouds/openstack/swift/v1/config/SwiftRestClientModule.java

@@ -18,7 +18,13 @@
  */
 package org.jclouds.openstack.swift.v1.config;
 
+import java.net.URI;
 import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.TimeUnit;
+
+import javax.inject.Provider;
+import javax.inject.Singleton;
 
 import org.jclouds.http.HttpErrorHandler;
 import org.jclouds.http.annotation.ClientError;
@@ -26,19 +32,31 @@ import org.jclouds.http.annotation.Redirection;
 import org.jclouds.http.annotation.ServerError;
 import org.jclouds.json.config.GsonModule.DateAdapter;
 import org.jclouds.json.config.GsonModule.Iso8601DateAdapter;
-import org.jclouds.openstack.swift.v1.SwiftAsyncApi;
 import org.jclouds.openstack.swift.v1.SwiftApi;
-import org.jclouds.openstack.swift.v1.features.AccountAsyncApi;
+import org.jclouds.openstack.swift.v1.SwiftAsyncApi;
 import org.jclouds.openstack.swift.v1.features.AccountApi;
-import org.jclouds.openstack.swift.v1.features.ContainerAsyncApi;
+import org.jclouds.openstack.swift.v1.features.AccountAsyncApi;
 import org.jclouds.openstack.swift.v1.features.ContainerApi;
-import org.jclouds.openstack.swift.v1.features.ObjectAsyncApi;
+import org.jclouds.openstack.swift.v1.features.ContainerAsyncApi;
 import org.jclouds.openstack.swift.v1.features.ObjectApi;
+import org.jclouds.openstack.swift.v1.features.ObjectAsyncApi;
 import org.jclouds.openstack.swift.v1.handlers.SwiftErrorHandler;
+import org.jclouds.openstack.v2_0.domain.Extension;
+import org.jclouds.openstack.v2_0.features.ExtensionApi;
+import org.jclouds.openstack.v2_0.features.ExtensionAsyncApi;
+import org.jclouds.openstack.v2_0.functions.PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet;
 import org.jclouds.rest.ConfiguresRestClient;
 import org.jclouds.rest.config.RestClientModule;
+import org.jclouds.rest.functions.ImplicitOptionalConverter;
 
+import com.google.common.cache.CacheBuilder;
+import com.google.common.cache.CacheLoader;
+import com.google.common.cache.LoadingCache;
 import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableMultimap;
+import com.google.common.collect.Multimap;
+import com.google.common.reflect.TypeToken;
+import com.google.inject.Provides;
 
 /**
  * Configures the Swift connection.
@@ -46,23 +64,48 @@ import com.google.common.collect.ImmutableMap;
  * @author Adrian Cole
  */
 @ConfiguresRestClient
-public class SwiftRestClientModule extends RestClientModule<SwiftApi, SwiftAsyncApi> {
+public class SwiftRestClientModule<S extends SwiftApi, A extends SwiftAsyncApi> extends RestClientModule<S, A> {
 
    public static final Map<Class<?>, Class<?>> DELEGATE_MAP = ImmutableMap.<Class<?>, Class<?>> builder()
+         .put(ExtensionApi.class, ExtensionAsyncApi.class)
          .put(AccountApi.class, AccountAsyncApi.class)
          .put(ContainerApi.class, ContainerAsyncApi.class)
          .put(ObjectApi.class, ObjectAsyncApi.class)
          .build();
 
    public SwiftRestClientModule() {
-      super(DELEGATE_MAP);
+      super(TypeToken.class.cast(TypeToken.of(SwiftApi.class)), TypeToken.class.cast(TypeToken.of(SwiftAsyncApi.class)), DELEGATE_MAP);
+   }
+
+   protected SwiftRestClientModule(TypeToken<S> syncClientType, TypeToken<A> asyncClientType, Map<Class<?>, Class<?>> sync2Async) {
+      super(syncClientType, asyncClientType, sync2Async);
    }
    
    @Override
    protected void configure() {
       bind(DateAdapter.class).to(Iso8601DateAdapter.class);
+      bind(ImplicitOptionalConverter.class).to(PresentWhenExtensionAnnotationNamespaceEqualsAnyNamespaceInExtensionsSet.class);
       super.configure();
    }
+   
+   @Provides
+   @Singleton
+   public Multimap<URI, URI> aliases() {
+       return ImmutableMultimap.<URI, URI>builder()
+          .build();
+   }
+
+   @Provides
+   @Singleton
+   public LoadingCache<String, Set<? extends Extension>> provideExtensionsByZone(final Provider<SwiftApi> swiftApi) {
+      return CacheBuilder.newBuilder().expireAfterWrite(23, TimeUnit.HOURS)
+            .build(new CacheLoader<String, Set<? extends Extension>>() {
+               @Override
+               public Set<? extends Extension> load(String key) throws Exception {
+                  return swiftApi.get().getExtensionApiForRegion(key).listExtensions();
+               }
+            });
+   }
 
    @Override
    protected void bindErrorHandlers() {