SimpleEmailServiceMailSender.java

/*
 * Copyright 2013-2014 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 org.springframework.cloud.aws.mail.simplemail;

import com.amazonaws.AmazonClientException;
import com.amazonaws.services.simpleemail.AmazonSimpleEmailService;
import com.amazonaws.services.simpleemail.model.Body;
import com.amazonaws.services.simpleemail.model.Content;
import com.amazonaws.services.simpleemail.model.Destination;
import com.amazonaws.services.simpleemail.model.Message;
import com.amazonaws.services.simpleemail.model.SendEmailRequest;
import com.amazonaws.services.simpleemail.model.SendEmailResult;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.mail.MailException;
import org.springframework.mail.MailSendException;
import org.springframework.mail.MailSender;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.util.StringUtils;

import java.util.HashMap;
import java.util.Map;

/**
 * Simple MailSender implementation to send E-Mails with the Amazon Simple Email Service. This implementation has no
 * dependencies to the Java Mail API. It can be used to send simple mail messages that doesn't have any attachment and
 * therefore only consist of a text body.
 */
public class SimpleEmailServiceMailSender implements MailSender, DisposableBean {

    private static final Logger LOGGER = LoggerFactory.getLogger(SimpleEmailServiceMailSender.class);
    private final AmazonSimpleEmailService emailService;

    public SimpleEmailServiceMailSender(AmazonSimpleEmailService amazonSimpleEmailService) {
        this.emailService = amazonSimpleEmailService;
    }

    @Override
    public void send(SimpleMailMessage simpleMailMessage) throws MailException {
        send(new SimpleMailMessage[]{simpleMailMessage});
    }

    @SuppressWarnings("OverloadedVarargsMethod")
    @Override
    public void send(SimpleMailMessage... simpleMailMessages) throws MailException {

        Map<Object, Exception> failedMessages = new HashMap<>();

        for (SimpleMailMessage simpleMessage : simpleMailMessages) {
            try {
                SendEmailResult sendEmailResult = getEmailService().sendEmail(prepareMessage(simpleMessage));
                if (LOGGER.isDebugEnabled()) {
                    LOGGER.debug("Message with id: {} successfully send", sendEmailResult.getMessageId());
                }
            } catch (AmazonClientException e) {
                //Ignore Exception because we are collecting and throwing all if any
                //noinspection ThrowableResultOfMethodCallIgnored
                failedMessages.put(simpleMessage, e);
            }
        }

        if (!failedMessages.isEmpty()) {
            throw new MailSendException(failedMessages);
        }
    }

    @Override
    public final void destroy() throws Exception {
        getEmailService().shutdown();
    }

    protected AmazonSimpleEmailService getEmailService() {
        return this.emailService;
    }

    private SendEmailRequest prepareMessage(SimpleMailMessage simpleMailMessage) {
        Destination destination = new Destination();
        destination.withToAddresses(simpleMailMessage.getTo());

        if (simpleMailMessage.getCc() != null) {
            destination.withCcAddresses(simpleMailMessage.getCc());
        }

        if (simpleMailMessage.getBcc() != null) {
            destination.withBccAddresses(simpleMailMessage.getBcc());
        }

        Content subject = new Content(simpleMailMessage.getSubject());
        Body body = new Body(new Content(simpleMailMessage.getText()));

        SendEmailRequest emailRequest = new SendEmailRequest(simpleMailMessage.getFrom(), destination, new Message(subject, body));

        if (StringUtils.hasText(simpleMailMessage.getReplyTo())) {
            emailRequest.withReplyToAddresses(simpleMailMessage.getReplyTo());
        }

        return emailRequest;
    }
}