br.com.ingenieux.mojo.beanstalk.bg.BluegreenDeploymentMojo.java Source code

Introduction

Here is the source code for br.com.ingenieux.mojo.beanstalk.bg.BluegreenDeploymentMojo.java

Source

package br.com.ingenieux.mojo.beanstalk.bg;

/*
 * Licensed 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.
 */

import com.google.common.base.Function;
import com.google.common.collect.Collections2;

import com.amazonaws.services.elasticbeanstalk.model.EnvironmentDescription;
import com.amazonaws.services.elasticbeanstalk.model.SwapEnvironmentCNAMEsRequest;

import org.apache.maven.plugins.annotations.Mojo;
import org.apache.maven.plugins.annotations.Parameter;

import java.util.Collection;

import br.com.ingenieux.mojo.beanstalk.AbstractNeedsEnvironmentMojo;
import br.com.ingenieux.mojo.beanstalk.cmd.env.update.UpdateEnvironmentCommand;
import br.com.ingenieux.mojo.beanstalk.cmd.env.update.UpdateEnvironmentContextBuilder;
import br.com.ingenieux.mojo.beanstalk.cmd.env.waitfor.WaitForEnvironmentCommand;
import br.com.ingenieux.mojo.beanstalk.cmd.env.waitfor.WaitForEnvironmentContextBuilder;

import static java.lang.String.format;

/**
 * <p>Implements Bluegreen Deployment</p>
 *
 * @since 1.3.0
 */
@Mojo(name = "blue-green")
public class BluegreenDeploymentMojo extends AbstractNeedsEnvironmentMojo {

    /**
     * environmentNamePrefix - Matches all environment names prefixed with
     */
    @Parameter(property = "beanstalk.environmentNamePrefix", required = true, defaultValue = "${beanstalk.environmentName}")
    protected String environmentNamePrefix;
    /**
     * Version Label to use. Defaults to Project Version
     */
    @Parameter(property = "beanstalk.versionLabel", defaultValue = "${project.version}-${maven.build.timestamp}")
    String versionLabel;

    @Override
    protected Object executeInternal() throws Exception {
        versionLabel = lookupVersionLabel(applicationName, versionLabel);

        getLog().info(format("Using version %s", versionLabel));

        Collection<EnvironmentDescription> envs = new WaitForEnvironmentCommand(this)
                .lookupInternal(new WaitForEnvironmentContextBuilder().withApplicationName(applicationName)
                        .withEnvironmentRef(environmentNamePrefix + "*").build());

        if (envs.size() > 2) {
            final Collection<String> environmentList = Collections2.transform(envs,
                    new Function<EnvironmentDescription, String>() {
                        @Override
                        public String apply(EnvironmentDescription input) {
                            return format("%s[%s]", input.getEnvironmentId(), input.getEnvironmentName());
                        }
                    });

            String message = "Ooops. There are multiple environments matching the lookup spec: " + environmentList;

            getLog().warn(message);
            getLog().warn("Will pick one at random anyway as long as it uses WebServer tier name");
        }

        String otherEnvId = null;
        for (EnvironmentDescription e : envs) {
            if (!e.getEnvironmentId().equals(curEnv.getEnvironmentId())
                    && "WebServer".equals(e.getTier().getName())) {
                otherEnvId = e.getEnvironmentId();
                break;
            }
        }

        getLog().info(
                format("(Green) Environment with environmentId['%s'] will be prepared once its ready to update",
                        curEnv.getEnvironmentId()));

        new WaitForEnvironmentCommand(this).execute(new WaitForEnvironmentContextBuilder()
                .withStatusToWaitFor("Ready").withApplicationName(applicationName)
                .withEnvironmentRef(curEnv.getEnvironmentId()).build());

        getLog().info(
                format("(Blue) Environment with environmentId['%s'] will be prepared once its ready to update",
                        otherEnvId));

        new WaitForEnvironmentCommand(this)
                .execute(new WaitForEnvironmentContextBuilder().withStatusToWaitFor("Ready")
                        .withApplicationName(applicationName).withEnvironmentRef(otherEnvId).build());

        getLog().info(format("(Blue) Updating environmentId to version %s", versionLabel));

        new UpdateEnvironmentCommand(this).execute(new UpdateEnvironmentContextBuilder()
                .withEnvironmentId(otherEnvId).withVersionLabel(versionLabel).build());

        getLog().info(format("(Blue) Waiting for environmentId['%s'] to get ready and green prior to switching",
                otherEnvId));

        new WaitForEnvironmentCommand(this).execute(new WaitForEnvironmentContextBuilder()
                .withStatusToWaitFor("Ready").withApplicationName(applicationName).withHealth("Green")
                .withEnvironmentRef(otherEnvId).build());

        getLog().info(format("Ok. Switching"));

        getService().swapEnvironmentCNAMEs(new SwapEnvironmentCNAMEsRequest()
                .withDestinationEnvironmentId(curEnv.getEnvironmentId()).withSourceEnvironmentId(otherEnvId));

        getLog().info(format("Done."));

        return null; //To change body of implemented methods use File | Settings | File Templates.
    }
}