changes to facilitate services that do not have regions

common/openstack/src/main/java/org/jclouds/openstack/domain/Resource.java

@@ -25,6 +25,8 @@ import static com.google.common.base.Preconditions.checkNotNull;
 
 import java.util.Set;
 
+import org.jclouds.javax.annotation.Nullable;
+
 import com.google.common.base.Objects;
 import com.google.common.collect.ImmutableSet;
 
@@ -62,8 +64,8 @@ public class Resource implements Comparable<Resource> {
       /**
        * @see Resource#getName()
        */
-      public Builder name(String name) {
+      public Builder name(@Nullable String name) {
-         this.name = checkNotNull(name, "name");
+         this.name = name;
          return this;
       }
 
@@ -95,9 +97,9 @@ public class Resource implements Comparable<Resource> {
    protected final String name;
    protected final Set<Link> links;
 
-   public Resource(String id, String name, Set<Link> links) {
+   public Resource(String id,@Nullable String name, Set<Link> links) {
       this.id = checkNotNull(id, "id");
-      this.name = checkNotNull(name, "name");
+      this.name =  name;
       this.links = ImmutableSet.copyOf(checkNotNull(links, "links"));
    }
 
@@ -114,6 +116,7 @@ public class Resource implements Comparable<Resource> {
    /**
     * @return the name of the resource
     */
+   @Nullable
    public String getName() {
       return name;
    }

common/openstack/src/main/java/org/jclouds/openstack/keystone/v2_0/config/KeystoneAuthenticationModule.java

@@ -36,7 +36,10 @@ import org.jclouds.http.annotation.ClientError;
 import org.jclouds.location.Provider;
 import org.jclouds.location.suppliers.RegionIdToURISupplier;
 import org.jclouds.location.suppliers.RegionIdsSupplier;
+import org.jclouds.location.suppliers.ZoneIdToURISupplier;
+import org.jclouds.location.suppliers.ZoneIdsSupplier;
 import org.jclouds.location.suppliers.derived.RegionIdsFromRegionIdToURIKeySet;
+import org.jclouds.location.suppliers.derived.ZoneIdsFromZoneIdToURIKeySet;
 import org.jclouds.openstack.Authentication;
 import org.jclouds.openstack.keystone.v2_0.ServiceAsyncClient;
 import org.jclouds.openstack.keystone.v2_0.ServiceClient;
@@ -45,6 +48,7 @@ import org.jclouds.openstack.keystone.v2_0.functions.AuthenticateApiAccessKeyCre
 import org.jclouds.openstack.keystone.v2_0.functions.AuthenticatePasswordCredentials;
 import org.jclouds.openstack.keystone.v2_0.handlers.RetryOnRenew;
 import org.jclouds.openstack.keystone.v2_0.suppliers.RegionIdToURIFromAccessForTypeAndVersionSupplier;
+import org.jclouds.openstack.keystone.v2_0.suppliers.ZoneIdToURIFromAccessForTypeAndVersionSupplier;
 import org.jclouds.rest.annotations.ApiVersion;
 
 import com.google.common.base.Function;
@@ -54,6 +58,7 @@ import com.google.common.cache.CacheLoader;
 import com.google.common.cache.LoadingCache;
 import com.google.inject.AbstractModule;
 import com.google.inject.Inject;
+import com.google.inject.Module;
 import com.google.inject.Provides;
 import com.google.inject.assistedinject.FactoryModuleBuilder;
 
@@ -63,6 +68,65 @@ import com.google.inject.assistedinject.FactoryModuleBuilder;
  */
 @RequiresHttp
 public class KeystoneAuthenticationModule extends AbstractModule {
+   private final Module locationModule;
+
+   public KeystoneAuthenticationModule() {
+      this(new RegionModule());
+   }
+
+   protected KeystoneAuthenticationModule(Module locationModule) {
+      this.locationModule = locationModule;
+   }
+
+   public static Module forRegions() {
+      return new KeystoneAuthenticationModule(new RegionModule());
+   }
+
+   public static class RegionModule extends AbstractModule {
+      @Override
+      protected void configure() {
+         install(new FactoryModuleBuilder().implement(RegionIdToURISupplier.class,
+                  RegionIdToURIFromAccessForTypeAndVersionSupplier.class).build(RegionIdToURISupplier.Factory.class));
+         // dynamically build the region list as opposed to from properties
+         bind(RegionIdsSupplier.class).to(RegionIdsFromRegionIdToURIKeySet.class);
+      }
+
+      // supply the region to id map from keystone, based on the servicetype and api version in
+      // config
+      @Provides
+      @Singleton
+      protected RegionIdToURISupplier provideRegionIdToURISupplierForApiVersion(
+               @Named(KeystoneProperties.SERVICE_TYPE) String serviceType, @ApiVersion String apiVersion,
+               RegionIdToURISupplier.Factory factory) {
+         return factory.createForApiTypeAndVersion(serviceType, apiVersion);
+      }
+
+   }
+
+   public static class ZoneModule extends AbstractModule {
+      @Override
+      protected void configure() {
+         install(new FactoryModuleBuilder().implement(ZoneIdToURISupplier.class,
+                  ZoneIdToURIFromAccessForTypeAndVersionSupplier.class).build(ZoneIdToURISupplier.Factory.class));
+         // dynamically build the zone list as opposed to from properties
+         bind(ZoneIdsSupplier.class).to(ZoneIdsFromZoneIdToURIKeySet.class);
+      }
+
+      // supply the zone to id map from keystone, based on the servicetype and api version in
+      // config
+      @Provides
+      @Singleton
+      protected ZoneIdToURISupplier provideZoneIdToURISupplierForApiVersion(
+               @Named(KeystoneProperties.SERVICE_TYPE) String serviceType, @ApiVersion String apiVersion,
+               ZoneIdToURISupplier.Factory factory) {
+         return factory.createForApiTypeAndVersion(serviceType, apiVersion);
+      }
+
+   }
+
+   public static Module forZones() {
+      return new KeystoneAuthenticationModule(new ZoneModule());
+   }
 
    @Override
    protected void configure() {
@@ -71,19 +135,7 @@ public class KeystoneAuthenticationModule extends AbstractModule {
       // ServiceClient is used directly for filters and retry handlers, so let's bind it
       // explicitly
       bindClientAndAsyncClient(binder(), ServiceClient.class, ServiceAsyncClient.class);
-      install(new FactoryModuleBuilder().implement(RegionIdToURISupplier.class,
+      install(locationModule);
-               RegionIdToURIFromAccessForTypeAndVersionSupplier.class).build(RegionIdToURISupplier.Factory.class));
-      // dynamically build the region list as opposed to from properties
-      bind(RegionIdsSupplier.class).to(RegionIdsFromRegionIdToURIKeySet.class);
-   }
-
-   // supply the region to id map from keystone, based on the servicetype and api version in config
-   @Provides
-   @Singleton
-   protected RegionIdToURISupplier provideRegionIdToURISupplierForApiVersion(
-            @Named(KeystoneProperties.SERVICE_TYPE) String serviceType, @ApiVersion String apiVersion,
-            RegionIdToURISupplier.Factory factory) {
-      return factory.createForApiTypeAndVersion(serviceType, apiVersion);
    }
 
    /**

common/openstack/src/main/java/org/jclouds/openstack/keystone/v2_0/suppliers/LocationIdToURIFromAccessForTypeAndVersionSupplier.java

@@ -0,0 +1,95 @@
+/**
+ * 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.suppliers;
+
+import java.net.URI;
+import java.util.Map;
+import java.util.NoSuchElementException;
+
+import javax.inject.Inject;
+import javax.inject.Singleton;
+
+import org.jclouds.openstack.keystone.v2_0.domain.Access;
+import org.jclouds.openstack.keystone.v2_0.domain.Endpoint;
+import org.jclouds.openstack.keystone.v2_0.domain.Service;
+import org.jclouds.openstack.keystone.v2_0.functions.EndpointToSupplierURI;
+
+import com.google.common.base.Function;
+import com.google.common.base.Predicate;
+import com.google.common.base.Supplier;
+import com.google.common.collect.Iterables;
+import com.google.common.collect.Maps;
+import com.google.inject.assistedinject.Assisted;
+
+@Singleton
+public class LocationIdToURIFromAccessForTypeAndVersionSupplier implements Supplier<Map<String, Supplier<URI>>> {
+   protected final Supplier<Access> access;
+   protected final EndpointToSupplierURI endpointToSupplierURI;
+   protected final Function<Endpoint, String> endpointToLocationId;
+   protected final String apiType;
+   protected final String apiVersion;
+
+   @Inject
+   public LocationIdToURIFromAccessForTypeAndVersionSupplier(Supplier<Access> access,
+            EndpointToSupplierURI endpointToSupplierURI, Function<Endpoint, String> endpointToLocationId,
+            @Assisted("apiType") String apiType, @Assisted("apiVersion") String apiVersion) {
+      this.access = access;
+      this.endpointToSupplierURI = endpointToSupplierURI;
+      this.endpointToLocationId = endpointToLocationId;
+      this.apiType = apiType;
+      this.apiVersion = apiVersion;
+   }
+
+   @Override
+   public Map<String, Supplier<URI>> get() {
+      Access accessResponse = access.get();
+      Service service = null;
+      try {
+         service = Iterables.find(accessResponse.getServiceCatalog(), new Predicate<Service>() {
+
+            @Override
+            public boolean apply(Service input) {
+               return input.getType().equals(apiType);
+            }
+
+         });
+      } catch (NoSuchElementException e) {
+         throw new NoSuchElementException(String.format("apiType %s not found in catalog %s", apiType,
+               accessResponse.getServiceCatalog()));
+      }
+      Map<String, Endpoint> locationIdToEndpoint = Maps.uniqueIndex(Iterables.filter(service.getEndpoints(),
+               new Predicate<Endpoint>() {
+
+                  @Override
+                  public boolean apply(Endpoint input) {
+                     if (input.getVersionId() == null) {
+                         return true;
+                     }
+                     return input.getVersionId().equals(apiVersion);
+                  }
+
+               }), endpointToLocationId);
+      return Maps.transformValues(locationIdToEndpoint, endpointToSupplierURI);
+   }
+
+   @Override
+   public String toString() {
+      return "locationIdToURIFromAccessForTypeAndVersion(" + apiType + ", " + apiVersion + ")";
+   }
+}

common/openstack/src/main/java/org/jclouds/openstack/keystone/v2_0/suppliers/RegionIdToURIFromAccessForTypeAndVersionSupplier.java

@@ -18,75 +18,26 @@
  */
 package org.jclouds.openstack.keystone.v2_0.suppliers;
 
-import java.net.URI;
-import java.util.Map;
-import java.util.NoSuchElementException;
-
 import javax.inject.Inject;
 import javax.inject.Singleton;
 
 import org.jclouds.location.suppliers.RegionIdToURISupplier;
 import org.jclouds.openstack.keystone.v2_0.domain.Access;
-import org.jclouds.openstack.keystone.v2_0.domain.Endpoint;
-import org.jclouds.openstack.keystone.v2_0.domain.Service;
 import org.jclouds.openstack.keystone.v2_0.functions.EndpointToRegion;
 import org.jclouds.openstack.keystone.v2_0.functions.EndpointToSupplierURI;
 
-import com.google.common.base.Predicate;
 import com.google.common.base.Supplier;
-import com.google.common.collect.Iterables;
-import com.google.common.collect.Maps;
 import com.google.inject.assistedinject.Assisted;
 
 @Singleton
-public class RegionIdToURIFromAccessForTypeAndVersionSupplier implements RegionIdToURISupplier {
+public class RegionIdToURIFromAccessForTypeAndVersionSupplier extends
-   private final Supplier<Access> access;
+         LocationIdToURIFromAccessForTypeAndVersionSupplier implements RegionIdToURISupplier {
-   private final EndpointToSupplierURI endpointToSupplierURI;
-   private final EndpointToRegion endpointToRegion;
-   private final String apiType;
-   private final String apiVersion;
 
    @Inject
    public RegionIdToURIFromAccessForTypeAndVersionSupplier(Supplier<Access> access,
             EndpointToSupplierURI endpointToSupplierURI, EndpointToRegion endpointToRegion,
             @Assisted("apiType") String apiType, @Assisted("apiVersion") String apiVersion) {
-      this.access = access;
+      super(access, endpointToSupplierURI, endpointToRegion, apiType, apiVersion);
-      this.endpointToSupplierURI = endpointToSupplierURI;
-      this.endpointToRegion = endpointToRegion;
-      this.apiType = apiType;
-      this.apiVersion = apiVersion;
-   }
-
-   @Override
-   public Map<String, Supplier<URI>> get() {
-      Access accessResponse = access.get();
-      Service service = null;
-      try {
-         service = Iterables.find(accessResponse.getServiceCatalog(), new Predicate<Service>() {
-
-            @Override
-            public boolean apply(Service input) {
-               return input.getType().equals(apiType);
-            }
-
-         });
-      } catch (NoSuchElementException e) {
-         throw new NoSuchElementException(String.format("apiType %s not found in catalog %s", apiType,
-               accessResponse.getServiceCatalog()));
-      }
-      Map<String, Endpoint> regionIdToEndpoint = Maps.uniqueIndex(Iterables.filter(service.getEndpoints(),
-               new Predicate<Endpoint>() {
-
-                  @Override
-                  public boolean apply(Endpoint input) {
-                     if (input.getVersionId() == null) {
-                         return true;
-                     }
-                     return input.getVersionId().equals(apiVersion);
-                  }
-
-               }), endpointToRegion);
-      return Maps.transformValues(regionIdToEndpoint, endpointToSupplierURI);
    }
 
    @Override

common/openstack/src/main/java/org/jclouds/openstack/keystone/v2_0/suppliers/ZoneIdToURIFromAccessForTypeAndVersionSupplier.java

@@ -0,0 +1,50 @@
+/**
+ * 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.suppliers;
+
+import javax.inject.Inject;
+import javax.inject.Singleton;
+
+import org.jclouds.location.suppliers.ZoneIdToURISupplier;
+import org.jclouds.openstack.keystone.v2_0.domain.Access;
+import org.jclouds.openstack.keystone.v2_0.functions.EndpointToRegion;
+import org.jclouds.openstack.keystone.v2_0.functions.EndpointToSupplierURI;
+
+import com.google.common.base.Supplier;
+import com.google.inject.assistedinject.Assisted;
+
+@Singleton
+public class ZoneIdToURIFromAccessForTypeAndVersionSupplier extends LocationIdToURIFromAccessForTypeAndVersionSupplier
+         implements ZoneIdToURISupplier {
+
+   @Inject
+   public ZoneIdToURIFromAccessForTypeAndVersionSupplier(
+            Supplier<Access> access,
+            // NOTE that in some services, the region is in fact the zone. temporarily, we need
+            // to use the region field, in this case.
+            EndpointToSupplierURI endpointToSupplierURI, EndpointToRegion endpointToZone,
+            @Assisted("apiType") String apiType, @Assisted("apiVersion") String apiVersion) {
+      super(access, endpointToSupplierURI, endpointToZone, apiType, apiVersion);
+   }
+
+   @Override
+   public String toString() {
+      return "zoneIdToURIFromAccessForTypeAndVersion(" + apiType + ", " + apiVersion + ")";
+   }
+}

common/openstack/src/test/java/org/jclouds/openstack/keystone/v2_0/parse/ParseAccessTest.java

@@ -80,10 +80,10 @@ public class ParseAccessTest extends BaseItemParserTest<Access> {
 
                Service.builder().name("Cloud Servers").type("compute").endpoints(
                         Endpoint.builder().tenantId("1").publicURL(URI.create("https://compute.north.host/v1/1234"))
-                                 .internalURL(URI.create("https://compute.north.host/v1/1234")).region("North")
+                                 .internalURL(URI.create("https://compute.north.host/v1/1234")).region("az-1.region-a.geo-1")
                                  .versionId("1.0").build(),
                         Endpoint.builder().tenantId("2").publicURL(URI.create("https://compute.north.host/v1.1/3456"))
-                                 .internalURL(URI.create("https://compute.north.host/v1.1/3456")).region("North")
+                                 .internalURL(URI.create("https://compute.north.host/v1.1/3456")).region("az-1.region-a.geo-1")
                                  .versionId("1.1").build()).build()).build();
 
    }

common/openstack/src/test/java/org/jclouds/openstack/keystone/v2_0/suppliers/RegionIdToURIFromAccessForTypeAndVersionSupplierTest.java

@@ -61,9 +61,9 @@ public class RegionIdToURIFromAccessForTypeAndVersionSupplierTest {
 
    public void testRegionMatches() {
       assertEquals(Maps.transformValues(factory.createForApiTypeAndVersion("compute", "1.0").get(), Suppliers
-               .<URI> supplierFunction()), ImmutableMap.of("North", URI.create("https://compute.north.host/v1/1234")));
+               .<URI> supplierFunction()), ImmutableMap.of("az-1.region-a.geo-1", URI.create("https://compute.north.host/v1/1234")));
       assertEquals(Maps.transformValues(factory.createForApiTypeAndVersion("compute", "1.1").get(), Suppliers
-               .<URI> supplierFunction()), ImmutableMap.of("North", URI.create("https://compute.north.host/v1.1/3456")));
+               .<URI> supplierFunction()), ImmutableMap.of("az-1.region-a.geo-1", URI.create("https://compute.north.host/v1.1/3456")));
    }
 
 }

common/openstack/src/test/java/org/jclouds/openstack/keystone/v2_0/suppliers/ZoneIdToURIFromAccessForTypeAndVersionSupplierTest.java

@@ -0,0 +1,71 @@
+/**
+ * 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.suppliers;
+
+import static org.testng.Assert.assertEquals;
+
+import java.net.URI;
+
+import javax.inject.Singleton;
+
+import org.jclouds.location.suppliers.ZoneIdToURISupplier;
+import org.jclouds.openstack.keystone.v2_0.domain.Access;
+import org.jclouds.openstack.keystone.v2_0.parse.ParseAccessTest;
+import org.testng.annotations.Test;
+
+import com.google.common.base.Supplier;
+import com.google.common.base.Suppliers;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Maps;
+import com.google.inject.AbstractModule;
+import com.google.inject.Guice;
+import com.google.inject.Provides;
+import com.google.inject.assistedinject.FactoryModuleBuilder;
+
+/**
+ * @author Adrian Cole
+ */
+@Test(groups = "unit", testName = "ZoneIdToURIFromAccessForTypeAndVersionSupplierTest")
+public class ZoneIdToURIFromAccessForTypeAndVersionSupplierTest {
+   private final ZoneIdToURISupplier.Factory factory = Guice.createInjector(new AbstractModule() {
+
+      @Override
+      protected void configure() {
+         install(new FactoryModuleBuilder().implement(ZoneIdToURISupplier.class,
+                  ZoneIdToURIFromAccessForTypeAndVersionSupplier.class).build(ZoneIdToURISupplier.Factory.class));
+      }
+
+      @SuppressWarnings("unused")
+      @Provides
+      @Singleton
+      public Supplier<Access> provide() {
+         return Suppliers.ofInstance(new ParseAccessTest().expected());
+      }
+   }).getInstance(ZoneIdToURISupplier.Factory.class);
+
+   public void testZoneMatches() {
+      assertEquals(Maps.transformValues(factory.createForApiTypeAndVersion("compute", "1.0").get(), Suppliers
+               .<URI> supplierFunction()), ImmutableMap.of("az-1.region-a.geo-1", URI
+               .create("https://compute.north.host/v1/1234")));
+      assertEquals(Maps.transformValues(factory.createForApiTypeAndVersion("compute", "1.1").get(), Suppliers
+               .<URI> supplierFunction()), ImmutableMap.of("az-1.region-a.geo-1", URI
+               .create("https://compute.north.host/v1.1/3456")));
+   }
+
+}

common/openstack/src/test/resources/keystoneAuthResponse.json

@@ -82,7 +82,7 @@
                         "tenantId":"1",
                         "publicURL":"https://compute.north.host/v1/1234",
                         "internalURL":"https://compute.north.host/v1/1234",
-                        "region":"North",
+                        "region":"az-1.region-a.geo-1",
                         "versionId":"1.0",
                         "versionInfo":"https://compute.north.host/v1.0/",
                         "versionList":"https://compute.north.host/"
@@ -91,7 +91,7 @@
                         "tenantId":"2",
                         "publicURL":"https://compute.north.host/v1.1/3456",
                         "internalURL":"https://compute.north.host/v1.1/3456",
-                        "region":"North",
+                        "region":"az-1.region-a.geo-1",
                         "versionId":"1.1",
                         "versionInfo":"https://compute.north.host/v1.1/",
                         "versionList":"https://compute.north.host/"

core/src/main/java/org/jclouds/location/suppliers/ZoneIdToURISupplier.java

@@ -25,6 +25,7 @@ import org.jclouds.location.suppliers.fromconfig.ZoneIdToURIFromConfigurationOrD
 
 import com.google.common.base.Supplier;
 import com.google.inject.ImplementedBy;
+import com.google.inject.assistedinject.Assisted;
 
 /**
  * 
@@ -33,5 +34,17 @@ import com.google.inject.ImplementedBy;
  */
 @ImplementedBy(ZoneIdToURIFromConfigurationOrDefaultToProvider.class)
 public interface ZoneIdToURISupplier extends Supplier<Map<String, Supplier<URI>>> {
-
+   static interface Factory {
+      /**
+       * 
+       * @param apiType
+       *           type of the api, according to the provider. ex. {@code compute} {@code
+       *           object-store}
+       * @param apiVersion
+       *           version of the api
+       * @return regions mapped to default uri
+       */
+      ZoneIdToURISupplier createForApiTypeAndVersion(@Assisted("apiType") String apiType,
+               @Assisted("apiVersion") String apiVersion);
+   }
 }

core/src/main/java/org/jclouds/location/suppliers/all/ZoneToRegionToProviderOrJustProvider.java

@@ -82,6 +82,7 @@ public class ZoneToRegionToProviderOrJustProvider implements LocationsSupplier {
       Map<String, Supplier<Set<String>>> isoCodesById = isoCodesByIdSupplier.get();
 
       Builder<Location> locations = ImmutableSet.builder();
+      if (!Iterables.all(regionsOrJustProvider, LocationPredicates.isProvider()))
          locations.addAll(regionsOrJustProvider);
       for (String zoneId : zoneIdToParent.keySet()) {
          Location parent = zoneIdToParent.get(zoneId);

core/src/main/java/org/jclouds/location/suppliers/derived/ZoneIdsFromZoneIdToURIKeySet.java

@@ -0,0 +1,50 @@
+/**
+ * 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.location.suppliers.derived;
+
+import java.net.URI;
+import java.util.Map;
+import java.util.Set;
+
+import javax.inject.Singleton;
+
+import org.jclouds.location.Zone;
+import org.jclouds.location.suppliers.ZoneIdsSupplier;
+
+import com.google.common.base.Supplier;
+import com.google.inject.Inject;
+
+/**
+ * as opposed to via properties, lets look up zones via api, as they are more likely to change
+ */
+@Singleton
+public class ZoneIdsFromZoneIdToURIKeySet implements ZoneIdsSupplier {
+
+   private final Supplier<Map<String, Supplier<URI>>> zoneIdToURISupplier;
+
+   @Inject
+   protected ZoneIdsFromZoneIdToURIKeySet(@Zone Supplier<Map<String, Supplier<URI>>> zoneIdToURISupplier) {
+      this.zoneIdToURISupplier = zoneIdToURISupplier;
+   }
+
+   @Override
+   public Set<String> get() {
+      return zoneIdToURISupplier.get().keySet();
+   }
+}