org.jclouds.examples.ec2.spot.MainApp.java Source code

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Here is the source code for org.jclouds.examples.ec2.spot.MainApp.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.examples.ec2.spot;

import java.io.File;
import java.io.IOException;
import java.util.Set;
import java.util.concurrent.TimeUnit;

import org.jclouds.aws.ec2.compute.AWSEC2TemplateOptions;
import org.jclouds.compute.ComputeService;
import org.jclouds.compute.ComputeServiceContextFactory;
import org.jclouds.compute.RunNodesException;
import org.jclouds.compute.domain.NodeMetadata;
import org.jclouds.compute.domain.Template;
import org.jclouds.compute.predicates.NodePredicates;
import org.jclouds.net.IPSocket;
import org.jclouds.predicates.InetSocketAddressConnect;
import org.jclouds.predicates.RetryablePredicate;

import com.google.common.base.Charsets;
import com.google.common.collect.Iterables;
import com.google.common.io.Files;

/**
 * This the Main class of an Application that demonstrates the use of the Amazon EC2 extensions by
 * creating a small spot server.
 * 
 * Usage is: java MainApp accesskeyid secretkey group command where command in create destroy
 */
public class MainApp {

    public static int PARAMETERS = 4;
    public static String INVALID_SYNTAX = "Invalid number of parameters. Syntax is: accesskeyid secretkey group command\nwhere command in create destroy";

    public static void main(String[] args) {

        if (args.length < PARAMETERS)
            throw new IllegalArgumentException(INVALID_SYNTAX);

        // Args
        String accesskeyid = args[0];
        String secretkey = args[1];
        String group = args[2];
        String command = args[3];

        // Init
        ComputeService compute = new ComputeServiceContextFactory().createContext("aws-ec2", accesskeyid, secretkey)
                .getComputeService();

        // wait up to 60 seconds for ssh to be accessible
        RetryablePredicate<IPSocket> socketTester = new RetryablePredicate<IPSocket>(new InetSocketAddressConnect(),
                60, 1, 1, TimeUnit.SECONDS);
        try {
            if (command.equals("create")) {

                Template template = compute.templateBuilder().build();

                template.getOptions().as(AWSEC2TemplateOptions.class)
                        // set the price as 3 cents/hr
                        .spotPrice(0.03f)
                        // authorize my ssh key
                        .authorizePublicKey(Files.toString(
                                new File(System.getProperty("user.home") + "/.ssh/id_rsa.pub"), Charsets.UTF_8));

                System.out.printf(">> running one spot node type(%s) with ami(%s) in group(%s)%n",
                        template.getHardware().getProviderId(), template.getImage().getId(), group);
                // run only a single node
                NodeMetadata node = Iterables.getOnlyElement(compute.createNodesInGroup(group, 1, template));

                System.out.printf("<< running node(%s)%n", node.getId());
                IPSocket socket = new IPSocket(Iterables.get(node.getPublicAddresses(), 0), node.getLoginPort());
                if (socketTester.apply(socket)) {
                    System.out.printf("<< socket ready [%s] node(%s)%n", socket, node.getId());
                    System.out.printf("ssh to node with the following command:%n ssh %s@%s%n",
                            node.getCredentials().identity, socket.getAddress());
                    System.exit(0);
                } else {
                    System.out.printf("<< socket not ready [%s] node(%s)%n", socket, node.getId());
                }
            } else if (command.equals("destroy")) {
                System.out.printf(">> destroying nodes in group(%s)%n", group);
                Set<? extends NodeMetadata> destroyed = compute.destroyNodesMatching(NodePredicates.inGroup(group));
                System.out.printf("<< destroyed(%d)%n", destroyed.size());
                System.exit(0);
            } else {
                System.err.println(INVALID_SYNTAX);
                System.exit(1);
            }
        } catch (RunNodesException e) {
            System.err.println(e.getMessage());
            for (NodeMetadata node : e.getNodeErrors().keySet())
                compute.destroyNode(node.getId());
            System.exit(1);
        } catch (IOException e) {
            System.err.println(e.getMessage());
            System.exit(1);
        } finally {
            compute.getContext().close();
        }

    }

}