/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.v1_1.suppliers;
import static com.google.common.collect.Iterables.tryFind;
import java.util.NoSuchElementException;
import javax.inject.Inject;
import javax.inject.Singleton;
import org.jclouds.location.suppliers.ImplicitRegionIdSupplier;
import org.jclouds.openstack.keystone.v1_1.domain.Auth;
import org.jclouds.openstack.keystone.v1_1.domain.Endpoint;
import org.jclouds.openstack.keystone.v1_1.functions.EndpointToRegion;
import com.google.common.base.Optional;
import com.google.common.base.Predicate;
import com.google.common.base.Supplier;
import com.google.common.collect.Iterables;
import com.google.inject.assistedinject.Assisted;
@Singleton
public class V1DefaultRegionIdSupplier implements ImplicitRegionIdSupplier {
public static interface Factory {
/**
*
* @param apiType
* type of the api, according to the provider. ex. {@code compute}
* {@code object-store}
* @return region id
* @throws NoSuchElementException
* if the {@code apiType} is not present in the catalog
*/
ImplicitRegionIdSupplier createForApiType(@Assisted("apiType") String apiType) throws NoSuchElementException;
}
private final Supplier<Auth> auth;
private final EndpointToRegion endpointToRegion;
private final String apiType;
@Inject
public V1DefaultRegionIdSupplier(Supplier<Auth> auth, EndpointToRegion endpointToRegion,
@Assisted("apiType") String apiType) {
this.auth = auth;
this.endpointToRegion = endpointToRegion;
this.apiType = apiType;
}
/**
* returns {@link Endpoint#isV1Default()} or first endpoint for service
*/
@Override
public String get() {
Auth authResponse = auth.get();
Iterable<Endpoint> endpointsForService = authResponse.getServiceCatalog().get(apiType);
Optional<Endpoint> defaultEndpoint = tryFind(endpointsForService, new Predicate<Endpoint>() {
@Override
public boolean apply(Endpoint in) {
return in.isV1Default();
}
});
return endpointToRegion.apply(defaultEndpoint.or(Iterables.get(endpointsForService, 0)));
}
@Override
public String toString() {
return "defaultRegionIdFor(" + apiType + ")";
}
}