org.apache.whirr.ByonClusterController.java Source code

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Here is the source code for org.apache.whirr.ByonClusterController.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.apache.whirr;

import static org.apache.whirr.service.ClusterActionHandler.BOOTSTRAP_ACTION;
import static org.apache.whirr.service.ClusterActionHandler.CONFIGURE_ACTION;
import static org.apache.whirr.service.ClusterActionHandler.DESTROY_ACTION;

import java.io.IOException;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import org.apache.whirr.Cluster.Instance;
import org.apache.whirr.actions.ByonClusterAction;
import org.apache.whirr.service.ClusterActionHandler;
import org.jclouds.compute.ComputeService;
import org.jclouds.compute.ComputeServiceContext;
import org.jclouds.compute.RunScriptOnNodesException;
import org.jclouds.compute.domain.ExecResponse;
import org.jclouds.compute.domain.NodeMetadata;
import org.jclouds.compute.domain.NodeState;
import org.jclouds.compute.options.RunScriptOptions;
import org.jclouds.scriptbuilder.domain.Statement;

import com.google.common.base.Function;
import com.google.common.base.Predicate;
import com.google.common.base.Predicates;
import com.google.common.cache.LoadingCache;
import com.google.common.collect.Collections2;

/**
 * Equivalent of {@link ClusterController}, but for execution in BYON mode
 * ("bring your own nodes").
 */
public class ByonClusterController extends ClusterController {

    @Override
    public String getName() {
        return "byon";
    }

    /**
     * Destroys a whirr BYON cluster.
     * Because this is a BYON cluster it also stops the services.
     */
    @Override
    public void destroyCluster(ClusterSpec clusterSpec) throws IOException, InterruptedException {
        stopServices(clusterSpec); // for BYON only
        LoadingCache<String, ClusterActionHandler> handlerMap = handlerMapFactory.create();
        ClusterAction destroyer = new ByonClusterAction(DESTROY_ACTION, getCompute(), handlerMap);
        destroyer.execute(clusterSpec, null);
    }

    /**
     * Provisions the hardware for a BYON cluster.
     */
    @Override
    public Cluster bootstrapCluster(ClusterSpec clusterSpec) throws IOException, InterruptedException {
        LoadingCache<String, ClusterActionHandler> handlerMap = handlerMapFactory.create();
        ClusterAction bootstrapper = new ByonClusterAction(BOOTSTRAP_ACTION, getCompute(), handlerMap);
        Cluster cluster = bootstrapper.execute(clusterSpec, null);
        getClusterStateStore(clusterSpec).save(cluster);
        return cluster;
    }

    /**
     * Configures cluster services for a BYON cluster.
     */
    @Override
    public Cluster configureServices(ClusterSpec clusterSpec, Cluster cluster, Set<String> targetRoles,
            Set<String> targetInstanceIds) throws IOException, InterruptedException {
        LoadingCache<String, ClusterActionHandler> handlerMap = handlerMapFactory.create();
        ClusterAction configurer = new ByonClusterAction(CONFIGURE_ACTION, getCompute(), handlerMap);
        cluster = configurer.execute(clusterSpec, cluster);
        getClusterStateStore(clusterSpec).save(cluster);
        return cluster;
    }

    public Map<? extends NodeMetadata, ExecResponse> runScriptOnNodesMatching(final ClusterSpec spec,
            Predicate<NodeMetadata> condition, final Statement statement)
            throws IOException, RunScriptOnNodesException {

        ComputeServiceContext computeServiceContext = getCompute().apply(spec);
        ComputeService computeService = computeServiceContext.getComputeService();
        Cluster cluster = getClusterStateStore(spec).load();

        RunScriptOptions options = RunScriptOptions.Builder.runAsRoot(false).wrapInInitScript(false);
        return computeService.runScriptOnNodesMatching(Predicates.<NodeMetadata>and(condition, runningIn(cluster)),
                statement, options);
    }

    private Predicate<NodeMetadata> runningIn(Cluster cluster) {
        final Set<String> instanceIds = new HashSet<String>(
                Collections2.transform(cluster.getInstances(), new Function<Instance, String>() {
                    @Override
                    public String apply(Instance instance) {
                        return instance.getId();
                    }
                }));
        return new Predicate<NodeMetadata>() {
            @Override
            public boolean apply(final NodeMetadata nodeMetadata) {
                return instanceIds.contains(nodeMetadata.getId())
                        && nodeMetadata.getState().equals(NodeState.RUNNING);
            }
        };
    }

    @Override
    public void destroyInstance(ClusterSpec clusterSpec, String instanceId) throws IOException {
        // TODO
    }

    @Override
    public Set<? extends NodeMetadata> getNodes(ClusterSpec clusterSpec) throws IOException, InterruptedException {
        ComputeServiceContext computeServiceContext = getCompute().apply(clusterSpec);
        ComputeService computeService = computeServiceContext.getComputeService();
        return computeService.listNodesDetailsMatching(Predicates.in(computeService.listNodes()));
    }
}