org.jclouds.googlecomputeengine.compute.loaders.FindNetworkOrCreate Maven / Gradle / Ivy

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/*
 * 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.googlecomputeengine.compute.loaders;

import static com.google.common.base.Preconditions.checkNotNull;

import javax.annotation.Resource;
import javax.inject.Inject;
import javax.inject.Named;

import org.jclouds.compute.reference.ComputeServiceConstants;
import org.jclouds.googlecomputeengine.GoogleComputeEngineApi;
import org.jclouds.googlecomputeengine.config.UserProject;
import org.jclouds.googlecomputeengine.domain.Network;
import org.jclouds.googlecomputeengine.domain.internal.NetworkAndAddressRange;
import org.jclouds.logging.Logger;

import com.google.common.base.Function;
import com.google.common.base.Supplier;
import com.google.common.cache.CacheLoader;

/**
 * @author Andrew Bayer
 */
public class FindNetworkOrCreate extends CacheLoader {
   @Resource
   @Named(ComputeServiceConstants.COMPUTE_LOGGER)
   protected Logger logger = Logger.NULL;
   protected final GoogleComputeEngineApi api;
   protected final Function networkCreator;
   protected final Supplier userProject;

   @Inject
   public FindNetworkOrCreate(GoogleComputeEngineApi api,
                              Function networkCreator,
                              @UserProject Supplier userProject) {
      this.api = checkNotNull(api, "api");
      this.networkCreator = checkNotNull(networkCreator, "networkCreator");
      this.userProject = checkNotNull(userProject, "userProject");
   }

   @Override
   public Network load(NetworkAndAddressRange in) {
      Network network = api.getNetworkApiForProject(userProject.get()).get(in.getName());
      if (network != null) {
         return network;
      } else {
         return networkCreator.apply(in);
      }
   }
}