br.com.ingenieux.mojo.beanstalk.version.CleanPreviousVersionsMojo.java Source code

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Here is the source code for br.com.ingenieux.mojo.beanstalk.version.CleanPreviousVersionsMojo.java

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

/*
 * 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.amazonaws.services.elasticbeanstalk.model.ApplicationVersionDescription;
import com.amazonaws.services.elasticbeanstalk.model.DeleteApplicationVersionRequest;
import com.amazonaws.services.elasticbeanstalk.model.DescribeApplicationVersionsRequest;
import com.amazonaws.services.elasticbeanstalk.model.DescribeApplicationVersionsResult;
import com.amazonaws.services.elasticbeanstalk.model.DescribeEnvironmentsResult;
import com.amazonaws.services.elasticbeanstalk.model.EnvironmentDescription;

import org.apache.commons.lang.builder.CompareToBuilder;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;
import org.apache.maven.plugins.annotations.Mojo;
import org.apache.maven.plugins.annotations.Parameter;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.List;
import java.util.ListIterator;
import java.util.regex.Pattern;

import br.com.ingenieux.mojo.beanstalk.AbstractBeanstalkMojo;

/**
 * Deletes application versions, either by count and/or by date old
 *
 * @since 0.2.2
 */
@Mojo(name = "clean-previous-versions")
public class CleanPreviousVersionsMojo extends AbstractBeanstalkMojo {

    /**
     * Beanstalk Application Name
     */
    @Parameter(property = "beanstalk.applicationName", defaultValue = "${project.artifactId}", required = true)
    String applicationName;

    /**
     * Delete the source bundle?
     */
    @Parameter(property = "beanstalk.deleteSourceBundle", defaultValue = "false")
    boolean deleteSourceBundle;

    /**
     * How many versions to keep?
     */
    @Parameter(property = "beanstalk.versionsToKeep")
    Integer versionsToKeep;

    /**
     * How many versions to keep?
     */
    @Parameter(property = "beanstalk.daysToKeep")
    Integer daysToKeep;

    /**
     * Filter application version list to examine for cleaning based on java.util.regex.Pattern
     * string.
     */
    @Parameter(property = "beanstalk.cleanFilter")
    String cleanFilter;

    /**
     * Simulate deletion changing algorithm?
     */
    @Parameter(property = "beanstalk.dryRun", defaultValue = "true")
    boolean dryRun;

    private int deletedVersionsCount;

    @Override
    protected Object executeInternal() throws MojoExecutionException, MojoFailureException {
        boolean bVersionsToKeepDefined = (null != versionsToKeep);
        boolean bDaysToKeepDefined = (null != daysToKeep);

        if (!(bVersionsToKeepDefined ^ bDaysToKeepDefined)) {
            throw new MojoFailureException("Declare either versionsToKeep or daysToKeep, but not both nor none!");
        }

        DescribeApplicationVersionsRequest describeApplicationVersionsRequest = new DescribeApplicationVersionsRequest()
                .withApplicationName(applicationName);

        DescribeApplicationVersionsResult appVersions = getService()
                .describeApplicationVersions(describeApplicationVersionsRequest);

        DescribeEnvironmentsResult environments = getService().describeEnvironments();

        List<ApplicationVersionDescription> appVersionList = new ArrayList<ApplicationVersionDescription>(
                appVersions.getApplicationVersions());

        deletedVersionsCount = 0;

        for (EnvironmentDescription d : environments.getEnvironments()) {
            boolean bActiveEnvironment = (d.getStatus().equals("Running") || d.getStatus().equals("Launching")
                    || d.getStatus().equals("Ready"));

            for (ListIterator<ApplicationVersionDescription> appVersionIterator = appVersionList
                    .listIterator(); appVersionIterator.hasNext();) {
                ApplicationVersionDescription appVersion = appVersionIterator.next();

                boolean bMatchesVersion = appVersion.getVersionLabel().equals(d.getVersionLabel());

                if (bActiveEnvironment && bMatchesVersion) {
                    getLog().info("VersionLabel " + appVersion.getVersionLabel() + " is bound to environment "
                            + d.getEnvironmentName() + " - Skipping it");

                    appVersionIterator.remove();
                }
            }
        }

        filterAppVersionListByVersionLabelPattern(appVersionList, cleanFilter);

        Collections.sort(appVersionList, new Comparator<ApplicationVersionDescription>() {
            @Override
            public int compare(ApplicationVersionDescription o1, ApplicationVersionDescription o2) {
                return new CompareToBuilder().append(o1.getDateUpdated(), o2.getDateUpdated()).toComparison();
            }
        });

        if (bDaysToKeepDefined) {
            Date now = new Date();

            for (ApplicationVersionDescription d : appVersionList) {
                long delta = now.getTime() - d.getDateUpdated().getTime();

                delta /= 1000;
                delta /= 86400;

                boolean shouldDeleteP = (delta > daysToKeep);

                if (getLog().isDebugEnabled()) {
                    getLog().debug("Version " + d.getVersionLabel() + " was from " + delta
                            + " days ago. Should we delete? " + shouldDeleteP);
                }

                if (shouldDeleteP) {
                    deleteVersion(d);
                }
            }
        } else {
            while (appVersionList.size() > versionsToKeep) {
                deleteVersion(appVersionList.remove(0));
            }
        }

        getLog().info("Deleted " + deletedVersionsCount + " versions.");

        return null;
    }

    void deleteVersion(ApplicationVersionDescription versionToRemove) {
        getLog().info("Must delete version: " + versionToRemove.getVersionLabel());

        DeleteApplicationVersionRequest req = new DeleteApplicationVersionRequest()
                .withApplicationName(versionToRemove.getApplicationName())//
                .withDeleteSourceBundle(deleteSourceBundle)//
                .withVersionLabel(versionToRemove.getVersionLabel());

        if (!dryRun) {
            getService().deleteApplicationVersion(req);
            deletedVersionsCount++;
        }
    }

    void filterAppVersionListByVersionLabelPattern(List<ApplicationVersionDescription> appVersionList,
            String patternString) {
        if (patternString == null) {
            return;
        }

        getLog().info("Filtering versions with pattern : " + patternString);

        Pattern p = Pattern.compile(patternString);
        for (ListIterator<ApplicationVersionDescription> appVersionIterator = appVersionList
                .listIterator(); appVersionIterator.hasNext();) {

            if (!p.matcher(appVersionIterator.next().getVersionLabel()).matches()) {
                appVersionIterator.remove();
            }
        }
    }
}