de.taimos.dvalin.cloud.aws.CloudFormation Maven / Gradle / Ivy

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package de.taimos.dvalin.cloud.aws;

/*-
 * #%L
 * Dvalin AWS support
 * %%
 * Copyright (C) 2016 - 2017 Taimos GmbH
 * %%
 * 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.
 * #L%
 */

import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.amazonaws.services.cloudformation.AmazonCloudFormationClient;
import com.amazonaws.services.cloudformation.model.ResourceSignalStatus;
import com.amazonaws.services.cloudformation.model.SignalResourceRequest;
import com.google.common.base.Preconditions;

@Service
public class CloudFormation {

    public static final String TAG_CLOUDFORMATION_LOGICAL_ID = "aws:cloudformation:logical-id";
    public static final String TAG_CLOUDFORMATION_STACK_NAME = "aws:cloudformation:stack-name";

    @AWSClient
    private AmazonCloudFormationClient cloudFormationClient;

    @Autowired
    private EC2Context ec2Context;

    /**
     * signal success to the given CloudFormation stack.

     * 

     * Needed AWS actions:
     * 
     * cloudformation:SignalResource
     * 
     */
    public void signalReady(String stackName, String resourceName) {
        Preconditions.checkArgument(stackName != null && !stackName.isEmpty());
        Preconditions.checkArgument(resourceName != null && !resourceName.isEmpty());
        SignalResourceRequest req = new SignalResourceRequest();
        req.setLogicalResourceId(resourceName);
        req.setStackName(stackName);
        req.setStatus(ResourceSignalStatus.SUCCESS);
        req.setUniqueId(this.ec2Context.getInstanceId());
        this.cloudFormationClient.signalResource(req);
    }

    /**
     * signal success to the current CloudFormation stack.

     * 

     * Needed AWS actions:
     * 
     * ec2:DescribeInstances
     * cloudformation:SignalResource
     * 
     *
     * @param resourceName the resource to signal
     */
    public void signalReady(String resourceName) {
        Preconditions.checkArgument(resourceName != null && !resourceName.isEmpty());
        Map hostTags = this.ec2Context.getInstanceTags();
        this.signalReady(hostTags.get(TAG_CLOUDFORMATION_STACK_NAME), resourceName);
    }

    /**
     * signal success to the current CloudFormation stack.

     * The resource is derived from the instance tags
     * 

     * Needed AWS actions:
     * 
     * ec2:DescribeInstances
     * cloudformation:SignalResource
     * 
     */
    public void signalReady() {
        Map hostTags = this.ec2Context.getInstanceTags();
        this.signalReady(hostTags.get(TAG_CLOUDFORMATION_STACK_NAME), hostTags.get(TAG_CLOUDFORMATION_LOGICAL_ID));
    }

}