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

Introduction

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

Source

/*
 * 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.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.List;
import java.util.Locale;

import lombok.Getter;
import lombok.Setter;

import org.apache.commons.io.FileUtils;
import org.gradle.api.GradleException;
import org.gradle.api.internal.ConventionTask;
import org.gradle.api.tasks.TaskAction;

import com.amazonaws.services.cloudformation.AmazonCloudFormation;
import com.amazonaws.services.cloudformation.model.Capability;
import com.amazonaws.services.cloudformation.model.CreateChangeSetRequest;
import com.amazonaws.services.cloudformation.model.CreateChangeSetResult;
import com.amazonaws.services.cloudformation.model.DescribeStacksRequest;
import com.amazonaws.services.cloudformation.model.DescribeStacksResult;
import com.amazonaws.services.cloudformation.model.Parameter;
import com.amazonaws.services.cloudformation.model.Stack;
import com.amazonaws.services.cloudformation.model.Tag;
import com.google.common.base.Strings;

public class AmazonCloudFormationCreateChangeSetTask extends ConventionTask {

    @Getter
    @Setter
    private String stackName;

    @Getter
    @Setter
    private String cfnTemplateUrl;

    @Getter
    @Setter
    private File cfnTemplateFile;

    @Getter
    @Setter
    private List<Parameter> cfnStackParams = new ArrayList<>();

    @Getter
    @Setter
    private List<Tag> cfnStackTags = new ArrayList<>();

    @Getter
    @Setter
    private boolean capabilityIam;

    @Getter
    @Setter
    private Capability useCapabilityIam;

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

    public AmazonCloudFormationCreateChangeSetTask() {
        setDescription("Create cfn change set.");
        setGroup("AWS");
    }

    @TaskAction
    public void createChangeSet() throws InterruptedException, IOException {
        // to enable conventionMappings feature
        String stackName = getStackName();
        List<String> stableStatuses = getStableStatuses();

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

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

        DescribeStacksResult describeStackResult = cfn
                .describeStacks(new DescribeStacksRequest().withStackName(stackName));
        Stack stack = describeStackResult.getStacks().get(0);
        if (stableStatuses.contains(stack.getStackStatus())) {
            createChangeSet(cfn);
        } else {
            throw new GradleException("invalid status for create change set: " + stack.getStackStatus());
        }
    }

    private void createChangeSet(AmazonCloudFormation cfn) throws IOException {
        // to enable conventionMappings feature
        String stackName = getStackName();
        String cfnTemplateUrl = getCfnTemplateUrl();
        List<Parameter> cfnStackParams = getCfnStackParams();
        List<Tag> cfnStackTags = getCfnStackTags();
        File cfnTemplateFile = getCfnTemplateFile();

        String changeSetName = changeSetName(stackName);
        getLogger().info("Create change set '{}' for stack '{}'", changeSetName, stackName);
        CreateChangeSetRequest req = new CreateChangeSetRequest().withChangeSetName(changeSetName)
                .withStackName(stackName).withParameters(cfnStackParams).withTags(cfnStackTags);

        // If template URL is specified, then use it
        if (Strings.isNullOrEmpty(cfnTemplateUrl) == false) {
            req.setTemplateURL(cfnTemplateUrl);
            // Else, use the template file body
        } else {
            req.setTemplateBody(FileUtils.readFileToString(cfnTemplateFile));
        }

        if (isCapabilityIam()) {
            Capability selectedCapability = (getUseCapabilityIam() == null) ? Capability.CAPABILITY_IAM
                    : getUseCapabilityIam();
            getLogger().info("Using IAM capability: " + selectedCapability);
            req.setCapabilities(Arrays.asList(selectedCapability.toString()));
        }
        CreateChangeSetResult createChangeSetResult = cfn.createChangeSet(req);
        getLogger().info("Create change set requested: {}", createChangeSetResult.getId());
    }

    private String changeSetName(String stackName) {
        return stackName + new SimpleDateFormat("-yyyyMMdd-HHmmss", Locale.ENGLISH).format(new Date());
    }
}