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Helper components for working with Amazon Web Services.

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// Generated by delombok at Wed Oct 31 01:50:25 UTC 2018
/*
 * This file is part of the ChillDev-Commons.
 *
 * @license http://mit-license.org/ The MIT license
 * @copyright 2017 © by Rafał Wrzeszcz - Wrzasq.pl.
 */
package pl.chilldev.commons.aws.sns;

import com.amazonaws.services.sns.AmazonSNS;
import com.amazonaws.services.sns.AmazonSNSClientBuilder;
import com.amazonaws.services.sns.model.PublishResult;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;

/**
 * Topic-wrapped AWS SNS client.
 */
public class TopicClient {
    /**
     * AWS SNS client.
     */
    private AmazonSNS sns;
    /**
     * JSON (de-)serialization handler.
     */
    private ObjectMapper objectMapper;
    /**
     * Topic ARN.
     */
    private String topicArn;

    /**
     * Initializes client wrapper with the default SNS client.
     *
     * 
     *     This is a simplified version for AWS internal services, like AWS Lambda, which relies on environment
     *     permissions.
     * 
     *
     * @param objectMapper JSON handler.
     * @param topicArn SNS topic ARN.
     */
    public TopicClient(ObjectMapper objectMapper, String topicArn) {
        this(AmazonSNSClientBuilder.standard().build(), objectMapper, topicArn);
    }

    /**
     * Publishes message to associated SNS topic.
     *
     * @param message Message to publish (will always be serialized to JSON, even if it's plain string).
     * @return Operation results.
     * @throws JsonProcessingException When message could not be serialized.
     */
    public PublishResult publish(Object message) throws JsonProcessingException {
        return this.sns.publish(this.topicArn, this.objectMapper.writeValueAsString(message));
    }

    @SuppressWarnings("all")
    public TopicClient(final AmazonSNS sns, final ObjectMapper objectMapper, final String topicArn) {
        this.sns = sns;
        this.objectMapper = objectMapper;
        this.topicArn = topicArn;
    }
}