org.fuin.auction.command.server.base.MailManager.java Source code

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Here is the source code for org.fuin.auction.command.server.base.MailManager.java

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/*
 * Copyright (c) 2010. Axon Auction Example
 *
 * 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.fuin.auction.command.server.base;

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

import javax.inject.Inject;
import javax.inject.Named;
import javax.mail.internet.MimeMessage;

import org.apache.velocity.app.VelocityEngine;
import org.axonframework.eventhandling.FullConcurrencyPolicy;
import org.axonframework.eventhandling.annotation.AsynchronousEventListener;
import org.axonframework.eventhandling.annotation.EventHandler;
import org.fuin.auction.command.server.events.UserCreatedEvent;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.mail.javamail.MimeMessagePreparator;
import org.springframework.ui.velocity.VelocityEngineUtils;

/**
 * Responsible for sending or receiving mails.
 */
@Named
@AsynchronousEventListener(sequencingPolicyClass = FullConcurrencyPolicy.class)
public class MailManager {

    private static final Logger LOG = LoggerFactory.getLogger(MailManager.class);

    @Inject
    private JavaMailSender mailSender;

    @Inject
    private VelocityEngine velocityEngine;

    @Inject
    @Named("mailProperties")
    private Properties mailProperties;

    /**
     * Sets the mail sender to a new value.
     * 
     * @param mailSender
     *            Mail sender to set.
     */
    protected final void setMailSender(final JavaMailSender mailSender) {
        this.mailSender = mailSender;
    }

    /**
     * Sets the velocity engine to a new value.
     * 
     * @param velocityEngine
     *            Engine to set.
     */
    protected final void setVelocityEngine(final VelocityEngine velocityEngine) {
        this.velocityEngine = velocityEngine;
    }

    /**
     * Sets the mail properties.
     * 
     * @param props
     *            Mail properties.
     */
    protected final void setMailProperties(final Properties props) {
        this.mailProperties = props;
    }

    /**
     * Creates a welcome mail with a unique identifier to verify the email
     * address.
     * 
     * @param event
     *            Event to handle.
     */
    @EventHandler
    public final void handle(final UserCreatedEvent event) {

        if (LOG.isDebugEnabled()) {
            LOG.debug("SEND user created mail to " + event.getEmail() + " [securityToken='"
                    + event.getSecurityToken() + "']");
        }

        final MimeMessagePreparator preparator = new MimeMessagePreparator() {
            public void prepare(final MimeMessage mimeMessage) throws Exception {
                final MimeMessageHelper message = new MimeMessageHelper(mimeMessage);
                message.setTo(event.getEmail().toString());
                message.setFrom(mailProperties.getProperty("sender"));
                final Map<String, String> varMap = new HashMap<String, String>();
                varMap.put("email", event.getEmail().toString());
                varMap.put("userName", event.getUserName().toString());
                varMap.put("securityToken", event.getSecurityToken().toString());
                final String text = VelocityEngineUtils.mergeTemplateIntoString(velocityEngine,
                        "user-created-mail.vm", varMap);
                message.setText(text, true);
            }
        };
        this.mailSender.send(preparator);

    }

}