com.netflix.spinnaker.kork.aws.pubsub.PubSubUtils.java Source code

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Here is the source code for com.netflix.spinnaker.kork.aws.pubsub.PubSubUtils.java

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/*
 * Copyright 2018 Netflix, Inc.
 *
 * 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 com.netflix.spinnaker.kork.aws.pubsub;

import com.amazonaws.auth.policy.*;
import com.amazonaws.auth.policy.actions.SQSActions;
import com.amazonaws.services.sns.AmazonSNS;
import com.amazonaws.services.sqs.AmazonSQS;
import com.netflix.spinnaker.kork.aws.ARN;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Collections;
import java.util.HashMap;

/**
 * Utils for working with AWS SNS and SQS across services
 */
public class PubSubUtils {
    private static final Logger log = LoggerFactory.getLogger(PubSubUtils.class);

    public static String ensureQueueExists(AmazonSQS amazonSQS, ARN queueARN, ARN topicARN,
            int sqsMessageRetentionPeriodSeconds) {
        String queueUrl = amazonSQS.createQueue(queueARN.getName()).getQueueUrl();
        log.debug("Created queue " + queueUrl);

        HashMap<String, String> attributes = new HashMap<>();
        attributes.put("Policy", buildSQSPolicy(queueARN, topicARN).toJson());
        attributes.put("MessageRetentionPeriod", Integer.toString(sqsMessageRetentionPeriodSeconds));
        amazonSQS.setQueueAttributes(queueUrl, attributes);

        return queueUrl;
    }

    public static String subscribeToTopic(AmazonSNS amazonSNS, ARN topicARN, ARN queueARN) {
        amazonSNS.subscribe(topicARN.getArn(), "sqs", queueARN.getArn());
        return topicARN.getArn();
    }

    /**
     * This policy allows messages to be sent from an SNS topic.
     */
    public static Policy buildSQSPolicy(ARN queue, ARN topic) {
        Statement snsStatement = new Statement(Statement.Effect.Allow).withActions(SQSActions.SendMessage);
        snsStatement.setPrincipals(Principal.All);
        snsStatement.setResources(Collections.singletonList(new Resource(queue.getArn())));
        snsStatement.setConditions(Collections.singletonList(new Condition().withType("ArnEquals")
                .withConditionKey("aws:SourceArn").withValues(topic.getArn())));

        return new Policy("allow-sns-send", Collections.singletonList(snsStatement));
    }
}