org.jclouds.openstack.nova.v2_0.compute.functions.AllocateAndAddFloatingIpToNode.java Source code

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Here is the source code for org.jclouds.openstack.nova.v2_0.compute.functions.AllocateAndAddFloatingIpToNode.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.openstack.nova.v2_0.compute.functions;

import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Preconditions.checkState;
import static org.jclouds.compute.config.ComputeServiceProperties.TIMEOUT_NODE_RUNNING;

import java.util.ArrayList;
import java.util.Collections;
import java.util.concurrent.atomic.AtomicReference;

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

import org.jclouds.compute.domain.NodeMetadata;
import org.jclouds.compute.domain.NodeMetadataBuilder;
import org.jclouds.compute.reference.ComputeServiceConstants;
import org.jclouds.logging.Logger;
import org.jclouds.openstack.nova.v2_0.NovaApi;
import org.jclouds.openstack.nova.v2_0.domain.FloatingIP;
import org.jclouds.openstack.nova.v2_0.domain.zonescoped.ZoneAndId;
import org.jclouds.openstack.nova.v2_0.extensions.FloatingIPApi;
import org.jclouds.rest.InsufficientResourcesException;

import com.google.common.base.Function;
import com.google.common.base.Objects;
import com.google.common.base.Predicate;
import com.google.common.cache.LoadingCache;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;

/**
 * A function for adding and allocating an ip to a node
 * 
 * @author Adrian Cole
 */
public class AllocateAndAddFloatingIpToNode
        implements Function<AtomicReference<NodeMetadata>, AtomicReference<NodeMetadata>> {

    @Resource
    @Named(ComputeServiceConstants.COMPUTE_LOGGER)
    protected Logger logger = Logger.NULL;

    private final Predicate<AtomicReference<NodeMetadata>> nodeRunning;
    private final NovaApi novaApi;
    private final LoadingCache<ZoneAndId, Iterable<? extends FloatingIP>> floatingIpCache;

    @Inject
    public AllocateAndAddFloatingIpToNode(
            @Named(TIMEOUT_NODE_RUNNING) Predicate<AtomicReference<NodeMetadata>> nodeRunning, NovaApi novaApi,
            @Named("FLOATINGIP") LoadingCache<ZoneAndId, Iterable<? extends FloatingIP>> floatingIpCache) {
        this.nodeRunning = checkNotNull(nodeRunning, "nodeRunning");
        this.novaApi = checkNotNull(novaApi, "novaApi");
        this.floatingIpCache = checkNotNull(floatingIpCache, "floatingIpCache");
    }

    @Override
    public AtomicReference<NodeMetadata> apply(AtomicReference<NodeMetadata> input) {
        checkState(nodeRunning.apply(input), "node never achieved state running %s", input.get());
        NodeMetadata node = input.get();
        // node's location is a host
        String zoneId = node.getLocation().getParent().getId();
        FloatingIPApi floatingIpApi = novaApi.getFloatingIPExtensionForZone(zoneId).get();

        FloatingIP ip = null;
        try {
            logger.debug(">> allocating or reassigning floating ip for node(%s)", node.getId());
            ip = floatingIpApi.create();
        } catch (InsufficientResourcesException e) {
            logger.trace("<< [%s] allocating a new floating ip for node(%s)", e.getMessage(), node.getId());
            logger.trace(">> searching for existing, unassigned floating ip for node(%s)", node.getId());
            ArrayList<FloatingIP> unassignedIps = Lists
                    .newArrayList(Iterables.filter(floatingIpApi.list(), new Predicate<FloatingIP>() {

                        @Override
                        public boolean apply(FloatingIP arg0) {
                            return arg0.getFixedIp() == null;
                        }

                    }));
            // try to prevent multiple parallel launches from choosing the same ip.
            Collections.shuffle(unassignedIps);
            ip = Iterables.getLast(unassignedIps);
        }
        logger.debug(">> adding floatingIp(%s) to node(%s)", ip.getIp(), node.getId());

        floatingIpApi.addToServer(ip.getIp(), node.getProviderId());
        input.set(NodeMetadataBuilder.fromNodeMetadata(node).publicAddresses(ImmutableSet.of(ip.getIp())).build());
        floatingIpCache.invalidate(ZoneAndId.fromSlashEncoded(node.getId()));
        return input;
    }

    @Override
    public String toString() {
        return Objects.toStringHelper("AllocateAndAddFloatingIpToNode").toString();
    }
}