jp.classmethod.aws.gradle.cloudformation.AmazonCloudFormationExecuteChangeSetTask.java Source code

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Here is the source code for jp.classmethod.aws.gradle.cloudformation.AmazonCloudFormationExecuteChangeSetTask.java

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/*
 * Copyright 2015-2016 the original author or authors.
 *
 * 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.
 */
package jp.classmethod.aws.gradle.cloudformation;

import java.io.IOException;
import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import java.util.Optional;

import lombok.Getter;
import lombok.Setter;

import org.gradle.api.GradleException;
import org.gradle.api.internal.ConventionTask;
import org.gradle.api.tasks.TaskAction;

import com.amazonaws.AmazonServiceException;
import com.amazonaws.services.cloudformation.AmazonCloudFormation;
import com.amazonaws.services.cloudformation.model.ChangeSetSummary;
import com.amazonaws.services.cloudformation.model.DescribeStacksRequest;
import com.amazonaws.services.cloudformation.model.DescribeStacksResult;
import com.amazonaws.services.cloudformation.model.ExecuteChangeSetRequest;
import com.amazonaws.services.cloudformation.model.ListChangeSetsRequest;
import com.amazonaws.services.cloudformation.model.ListChangeSetsResult;
import com.amazonaws.services.cloudformation.model.Stack;

public class AmazonCloudFormationExecuteChangeSetTask extends ConventionTask {

    @Getter
    @Setter
    String stackName;

    private List<String> stableStatuses = Arrays.asList("CREATE_COMPLETE", "ROLLBACK_COMPLETE", "UPDATE_COMPLETE",
            "UPDATE_ROLLBACK_COMPLETE");

    public AmazonCloudFormationExecuteChangeSetTask() {
        setDescription("Execute the latest cfn change set.");
        setGroup("AWS");
    }

    @TaskAction
    public void executeChangeSet() throws InterruptedException, IOException {
        // to enable conventionMappings feature
        String stackName = getStackName();

        if (stackName == null) {
            throw new GradleException("stackName is not specified");
        }

        AmazonCloudFormationPluginExtension ext = getProject().getExtensions()
                .getByType(AmazonCloudFormationPluginExtension.class);
        AmazonCloudFormation cfn = ext.getClient();

        try {
            DescribeStacksResult describeStackResult = cfn
                    .describeStacks(new DescribeStacksRequest().withStackName(stackName));
            Stack stack = describeStackResult.getStacks().get(0);

            if (stableStatuses.contains(stack.getStackStatus())) {
                Optional<ChangeSetSummary> summary = getLatestChangeSetSummary(cfn);
                String changeSetName = summary
                        .orElseThrow(
                                () -> new GradleException("ChangeSet for stack " + stackName + " was not found."))
                        .getChangeSetName();
                ExecuteChangeSetRequest req = new ExecuteChangeSetRequest().withStackName(stackName)
                        .withChangeSetName(changeSetName);
                cfn.executeChangeSet(req);
                getLogger().info("ChangeSet is executed : {}, {}", stackName, changeSetName);
            } else {
                throw new GradleException("invalid status for update: " + stack.getStackStatus());
            }
        } catch (AmazonServiceException e) {
            if (e.getMessage().contains("does not exist")) {
                getLogger().warn("stack {} not found", stackName);
            } else if (e.getMessage().contains("No updates are to be performed.")) {
                getLogger().trace(e.getMessage());
            } else {
                throw e;
            }
        }

    }

    /**
     *
     * Return the latest ChangeSet Summary for the specified CloudFormation stack.
     * @param cfn AmazonCloudFormation
     * @return Optional
     */
    private Optional<ChangeSetSummary> getLatestChangeSetSummary(AmazonCloudFormation cfn) {

        ListChangeSetsResult changeSetsResult = cfn
                .listChangeSets(new ListChangeSetsRequest().withStackName(getStackName()));
        List<ChangeSetSummary> changeSetSummaries = changeSetsResult.getSummaries();
        if (changeSetSummaries.isEmpty()) {
            return Optional.empty();
        }

        changeSetSummaries.sort(Comparator.comparing(ChangeSetSummary::getCreationTime).reversed());
        return Optional.of(changeSetSummaries.get(0));
    }

}