de.codecentric.boot.admin.notify.MailNotifier.java Source code

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Here is the source code for de.codecentric.boot.admin.notify.MailNotifier.java

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/*
 * 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 de.codecentric.boot.admin.notify;

import java.util.Arrays;

import org.springframework.expression.EvaluationContext;
import org.springframework.expression.Expression;
import org.springframework.expression.ParserContext;
import org.springframework.expression.spel.standard.SpelExpressionParser;
import org.springframework.expression.spel.support.StandardEvaluationContext;
import org.springframework.mail.MailSender;
import org.springframework.mail.SimpleMailMessage;

import de.codecentric.boot.admin.event.ClientApplicationStatusChangedEvent;

/**
 * Notifier sending emails.
 *
 * @author Johannes Edmeier
 */
public class MailNotifier extends AbstractStatusChangeNotifier {
    private final static String DEFAULT_SUBJECT = "#{application.name} (#{application.id}) is #{to.status}";
    private final static String DEFAULT_TEXT = "#{application.name} (#{application.id})\nstatus changed from #{from.status} to #{to.status}\n\n#{application.healthUrl}";

    private final SpelExpressionParser parser = new SpelExpressionParser();
    private final MailSender sender;

    /**
     * recipients of the mail
     */
    private String to[] = { "root@localhost" };

    /**
     * cc-recipients of the mail
     */
    private String cc[];

    /**
     * sender of the change
     */
    private String from = null;

    /**
     * Mail Text. SpEL template using event as root;
     */
    private Expression text;

    /**
     * Mail Subject. SpEL template using event as root;
     */
    private Expression subject;

    public MailNotifier(MailSender sender) {
        this.sender = sender;
        this.subject = parser.parseExpression(DEFAULT_SUBJECT, ParserContext.TEMPLATE_EXPRESSION);
        this.text = parser.parseExpression(DEFAULT_TEXT, ParserContext.TEMPLATE_EXPRESSION);
    }

    @Override
    protected void doNotify(ClientApplicationStatusChangedEvent event) {
        EvaluationContext context = new StandardEvaluationContext(event);

        SimpleMailMessage message = new SimpleMailMessage();
        message.setTo(to);
        message.setFrom(from);
        message.setSubject(subject.getValue(context, String.class));
        message.setText(text.getValue(context, String.class));
        message.setCc(cc);

        sender.send(message);
    }

    public void setTo(String[] to) {
        this.to = Arrays.copyOf(to, to.length);
    }

    public void setCc(String[] cc) {
        this.cc = Arrays.copyOf(cc, cc.length);
    }

    public void setFrom(String from) {
        this.from = from;
    }

    public void setSubject(String subject) {
        this.subject = parser.parseExpression(subject, ParserContext.TEMPLATE_EXPRESSION);
    }

    public void setText(String text) {
        this.text = parser.parseExpression(text, ParserContext.TEMPLATE_EXPRESSION);
    }

}