org.jclouds.aws.ec2.compute.strategy.AWSEC2ListNodesStrategy.java Source code

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Here is the source code for org.jclouds.aws.ec2.compute.strategy.AWSEC2ListNodesStrategy.java

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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.aws.ec2.compute.strategy;

import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Predicates.notNull;
import static com.google.common.collect.Iterables.concat;
import static com.google.common.collect.Iterables.filter;
import static com.google.common.collect.Iterables.toArray;
import static com.google.common.collect.Iterables.transform;

import java.util.Set;

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

import org.jclouds.Constants;
import org.jclouds.aws.ec2.AWSEC2Api;
import org.jclouds.aws.ec2.domain.AWSRunningInstance;
import org.jclouds.aws.ec2.domain.SpotInstanceRequest;
import org.jclouds.aws.ec2.functions.SpotInstanceRequestToAWSRunningInstance;
import org.jclouds.compute.domain.NodeMetadata;
import org.jclouds.ec2.compute.strategy.EC2ListNodesStrategy;
import org.jclouds.ec2.domain.RunningInstance;
import org.jclouds.location.Region;

import com.google.common.base.Function;
import com.google.common.base.Supplier;
import com.google.common.collect.Multimap;
import com.google.common.util.concurrent.ListeningExecutorService;
import com.google.inject.Inject;

/**
 * 
 * @author Adrian Cole
 */
@Singleton
public class AWSEC2ListNodesStrategy extends EC2ListNodesStrategy {

    protected final AWSEC2Api client;
    protected final SpotInstanceRequestToAWSRunningInstance spotConverter;

    @Inject
    protected AWSEC2ListNodesStrategy(AWSEC2Api client, @Region Supplier<Set<String>> regions,
            Function<RunningInstance, NodeMetadata> runningInstanceToNodeMetadata,
            @Named(Constants.PROPERTY_USER_THREADS) ListeningExecutorService userExecutor,
            SpotInstanceRequestToAWSRunningInstance spotConverter) {
        super(client, regions, runningInstanceToNodeMetadata, userExecutor);
        this.client = checkNotNull(client, "client");
        this.spotConverter = checkNotNull(spotConverter, "spotConverter");
    }

    @Override
    protected Iterable<? extends RunningInstance> pollRunningInstances() {
        Iterable<? extends AWSRunningInstance> spots = filter(
                transform(concat(transform(regions.get(), allSpotInstancesInRegion())), spotConverter), notNull());

        return concat(super.pollRunningInstances(), spots);
    }

    @Override
    protected Iterable<? extends RunningInstance> pollRunningInstancesByRegionsAndIds(
            final Multimap<String, String> idsByRegions) {
        Iterable<? extends AWSRunningInstance> spots = filter(
                transform(concat(transform(idsByRegions.keySet(), spotInstancesByIdInRegion(idsByRegions))),

                        spotConverter),
                notNull());
        Iterable<? extends RunningInstance> superInsts = super.pollRunningInstancesByRegionsAndIds(idsByRegions);
        return concat(superInsts, spots);
    }

    protected Function<String, Set<SpotInstanceRequest>> allSpotInstancesInRegion() {
        return new Function<String, Set<SpotInstanceRequest>>() {

            @Override
            public Set<SpotInstanceRequest> apply(String from) {
                return client.getSpotInstanceApi().get().describeSpotInstanceRequestsInRegion(from);
            }
        };
    }

    protected Function<String, Set<SpotInstanceRequest>> spotInstancesByIdInRegion(
            final Multimap<String, String> idsByRegions) {
        return new Function<String, Set<SpotInstanceRequest>>() {

            @Override
            public Set<SpotInstanceRequest> apply(String from) {
                return client.getSpotInstanceApi().get().describeSpotInstanceRequestsInRegion(from,
                        toArray(idsByRegions.get(from), String.class));
            }
        };
    }

}