ru.retbansk.utils.UsefulMethods.java Source code

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Here is the source code for ru.retbansk.utils.UsefulMethods.java

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/*
 * Copyright 2012 the original author.
 *
 * 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 ru.retbansk.utils;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.io.StringReader;
import java.util.Properties;

import java.io.StringWriter;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;

import org.apache.log4j.Logger;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSenderImpl;

/**
 * Includes three static methods. See bellow
 * @see #populate()
 * @see #loadProperties()
 * @see #prettyFormat(String)
 * @author Siarhei Yanusheuski
 * @since 25.10.2012
 */
public class UsefulMethods {
    protected static Logger logger = Logger.getLogger("service");

    /** Simple loading properties from email.properties file.
     * <p> At first, program will try to read external properties.
     * If nothing there - internal
     * <p> Implements user exit
     * 
     * @return java.util.Properties;
     * @throws Exception
     */
    public static Properties loadProperties() throws Exception {
        Properties prop = new Properties();
        InputStream inputStream = null;
        // At first, program will try to read external properties
        try {
            inputStream = new FileInputStream("email.properties");
            prop.load(inputStream);
        } catch (FileNotFoundException e) {
        }
        // If nothing there - internal
        if (inputStream == null)
            inputStream = prop.getClass().getResourceAsStream("/email.properties");

        prop.load(inputStream);
        if (inputStream != null)
            inputStream.close();
        // Implementing user exit
        try {
            if (prop.getProperty("continue").equals("no")) {
                logger.info("Program was stopped by the User");
                System.exit(0);
            }
        } catch (Exception e) {
            logger.info("Continue parameter is not defined");
        }
        return prop;
    }

    /**
     * For testing usage. Take unformatted xml string. Return pretty readable xml string
     * 
     * @param input take unformatted xml string
     * @param indent a number of white spaces before each line
     * @return pretty readable xml string
     */

    public static String prettyFormat(String input, int indent) {
        try {
            Source xmlInput = new StreamSource(new StringReader(input));
            StringWriter stringWriter = new StringWriter();
            StreamResult xmlOutput = new StreamResult(stringWriter);
            TransformerFactory transformerFactory = TransformerFactory.newInstance();
            // This statement works with JDK 6
            transformerFactory.setAttribute("indent-number", indent);

            Transformer transformer = transformerFactory.newTransformer();
            transformer.setOutputProperty(OutputKeys.INDENT, "yes");
            transformer.transform(xmlInput, xmlOutput);
            return xmlOutput.getWriter().toString();
        } catch (Throwable e) {
            // You'll come here if you are using JDK 1.5
            // you are getting an the following exeption
            // java.lang.IllegalArgumentException: Not supported: indent-number
            // Use this code (Set the output property in transformer.
            try {
                Source xmlInput = new StreamSource(new StringReader(input));
                StringWriter stringWriter = new StringWriter();
                StreamResult xmlOutput = new StreamResult(stringWriter);
                TransformerFactory transformerFactory = TransformerFactory.newInstance();
                Transformer transformer = transformerFactory.newTransformer();
                transformer.setOutputProperty(OutputKeys.INDENT, "yes");
                transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", String.valueOf(indent));
                transformer.transform(xmlInput, xmlOutput);
                return xmlOutput.getWriter().toString();
            } catch (Throwable t) {
                return input;
            }
        }
    }

    public static String prettyFormat(String input) {
        return prettyFormat(input, 2);
    }

    /**
     * For testing usage
     * Sending to mr.server.serverovich@yandex.ru four reports.
     * <p> One is invalid. Two from one email address
     * @throws InterruptedException I used Thread.sleep method in be ensure in the order of sending
     */
    public static void populate() throws InterruptedException {
        JavaMailSenderImpl mailSender = new JavaMailSenderImpl();
        SimpleMailMessage msg = new SimpleMailMessage();
        msg.setFrom("another.tester@yandex.ru");
        msg.setSubject("Test report 4");
        msg.setTo("mr.server.serverovich@yandex.ru");
        msg.setText("   ,  ??, 8");
        mailSender.setHost("smtp.yandex.ru");
        mailSender.setUsername("another.tester@yandex.ru");
        mailSender.setPassword("tester");
        mailSender.send(msg);
        SimpleMailMessage[] msgs = new SimpleMailMessage[3];
        for (int i = 0; i < 3; i++) {
            msgs[i] = new SimpleMailMessage();
            msgs[i].setFrom("tester.testerovich@yandex.ru");
            msgs[i].setSubject("Test report " + (i + 1));
            msgs[i].setTo("mr.server.serverovich@yandex.ru");
        }
        msgs[2].setText(
                "helping Google with Android, in process, 7\nmain job/ in process/1\nnothing actually. done. 3");
        msgs[1].setText("Testing error report");
        msgs[0].setText(", , 2\n,  ??, 6");
        mailSender.setUsername("tester.testerovich@yandex.ru");
        mailSender.setPassword("tester");
        Thread.sleep(1000);
        mailSender.send(msgs[0]);
        Thread.sleep(1000);
        mailSender.send(msgs[1]);
        Thread.sleep(1000);
        mailSender.send(msgs[2]);

    }
}