org.jclouds.deltacloud.config.DeltacloudRestClientModule.java Source code

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Here is the source code for org.jclouds.deltacloud.config.DeltacloudRestClientModule.java

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/**
 *
 * Copyright (C) 2010 Cloud Conscious, LLC. <info@cloudconscious.com>
 *
 * ====================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ====================================================================
 */

package org.jclouds.deltacloud.config;

import static org.jclouds.Constants.PROPERTY_SESSION_INTERVAL;

import java.net.URI;
import java.util.NoSuchElementException;
import java.util.Set;
import java.util.concurrent.atomic.AtomicReference;

import javax.inject.Named;
import javax.inject.Singleton;

import org.jclouds.deltacloud.DeltacloudAsyncClient;
import org.jclouds.deltacloud.DeltacloudClient;
import org.jclouds.deltacloud.collections.HardwareProfiles;
import org.jclouds.deltacloud.collections.Images;
import org.jclouds.deltacloud.collections.InstanceStates;
import org.jclouds.deltacloud.collections.Instances;
import org.jclouds.deltacloud.collections.Realms;
import org.jclouds.deltacloud.domain.DeltacloudCollection;
import org.jclouds.deltacloud.handlers.DeltacloudErrorHandler;
import org.jclouds.deltacloud.handlers.DeltacloudRedirectionRetryHandler;
import org.jclouds.http.HttpErrorHandler;
import org.jclouds.http.HttpRetryHandler;
import org.jclouds.http.RequiresHttp;
import org.jclouds.http.annotation.ClientError;
import org.jclouds.http.annotation.Redirection;
import org.jclouds.http.annotation.ServerError;
import org.jclouds.rest.AuthorizationException;
import org.jclouds.rest.ConfiguresRestClient;
import org.jclouds.rest.config.RestClientModule;
import org.jclouds.rest.suppliers.RetryOnTimeOutButNotOnAuthorizationExceptionSupplier;

import com.google.common.base.Predicate;
import com.google.common.base.Supplier;
import com.google.common.collect.Iterables;
import com.google.inject.Provides;

/**
 * Configures the deltacloud connection.
 * 
 * @author Adrian Cole
 */
@RequiresHttp
@ConfiguresRestClient
public class DeltacloudRestClientModule extends RestClientModule<DeltacloudClient, DeltacloudAsyncClient> {

    public DeltacloudRestClientModule() {
        super(DeltacloudClient.class, DeltacloudAsyncClient.class);
    }

    @Override
    protected void bindErrorHandlers() {
        bind(HttpErrorHandler.class).annotatedWith(Redirection.class).to(DeltacloudErrorHandler.class);
        bind(HttpErrorHandler.class).annotatedWith(ClientError.class).to(DeltacloudErrorHandler.class);
        bind(HttpErrorHandler.class).annotatedWith(ServerError.class).to(DeltacloudErrorHandler.class);
    }

    @Override
    protected void bindRetryHandlers() {
        bind(HttpRetryHandler.class).annotatedWith(Redirection.class).to(DeltacloudRedirectionRetryHandler.class);
    }

    protected AtomicReference<AuthorizationException> authException = new AtomicReference<AuthorizationException>();

    @Provides
    @Singleton
    protected Supplier<Set<? extends DeltacloudCollection>> provideCollections(
            @Named(PROPERTY_SESSION_INTERVAL) long seconds, final DeltacloudClient client) {
        return new RetryOnTimeOutButNotOnAuthorizationExceptionSupplier<Set<? extends DeltacloudCollection>>(
                authException, seconds, new Supplier<Set<? extends DeltacloudCollection>>() {
                    @Override
                    public Set<? extends DeltacloudCollection> get() {
                        return client.getCollections();
                    }
                });
    }

    /**
     * since the supplier is memoized, and there are no objects created here, this doesn't need to be
     * singleton.
     */
    @Provides
    @Images
    protected URI provideImageCollection(Supplier<Set<? extends DeltacloudCollection>> collectionSupplier) {
        return findCollectionWithRel(collectionSupplier.get(), "images").getHref();
    }

    public static DeltacloudCollection findCollectionWithRel(Iterable<? extends DeltacloudCollection> iterable,
            final String rel) {
        try {
            return Iterables.find(iterable, new Predicate<DeltacloudCollection>() {

                @Override
                public boolean apply(DeltacloudCollection arg0) {
                    return arg0.getRel().equals(rel);
                }

            });
        } catch (NoSuchElementException e) {
            throw new NoSuchElementException("could not find rel " + rel + " in collections " + iterable);
        }
    }

    @Provides
    @HardwareProfiles
    protected URI provideHardwareProfileCollection(
            Supplier<Set<? extends DeltacloudCollection>> collectionSupplier) {
        return findCollectionWithRel(collectionSupplier.get(), "hardware_profiles").getHref();
    }

    @Provides
    @Instances
    protected URI provideInstanceCollection(Supplier<Set<? extends DeltacloudCollection>> collectionSupplier) {
        return findCollectionWithRel(collectionSupplier.get(), "instances").getHref();
    }

    @Provides
    @Realms
    protected URI provideRealmCollection(Supplier<Set<? extends DeltacloudCollection>> collectionSupplier) {
        return findCollectionWithRel(collectionSupplier.get(), "realms").getHref();
    }

    @Provides
    @InstanceStates
    protected URI provideInstanceStateCollection(Supplier<Set<? extends DeltacloudCollection>> collectionSupplier) {
        return findCollectionWithRel(collectionSupplier.get(), "instance_states").getHref();
    }
}