Simple reusable YahooMailJava class for sending Aysnc emails via Yahoo. Copy the class, change the username/password and use it in your next project.Step 1: Add dependencies to your maven project<!-- mail --> <dependency> <groupId>javax.mail</groupId> <artifactId>mail</artifactId> <version>1.4</version> </dependency> <!-- Apache Commons Validator --> <dependency> <groupId>commons-validator</groupId> <artifactId>commons-validator</artifactId> <version>1.4.0</version> </dependency> Step 2: Copy YahooMailService.java to your project and set username/passwordcode: https://github.com/intesar/YahooMailJava/blob/master/src/main/java/com/bia/yahoomailjava/YahooMailService.javaSample code YahooMailService emailService = YahooMailService.getInstance();emailService.sendEmail("<toemail>", "<subject>", "<body>");Design Decisions No interface is define to keep simpler eco-system, feel free to add yours if required and refactor code accordingly Pattern's & Technique's used - Singleton, Command, Async, Inner class
fork it on github or copy the required classes https://github.com/intesar/YahooMailJava
According to JPA specification we can define multiple "persistence-unit" elements (i.e. like below) in persistence.xml file and can easily refer them inside Dao layers as this. public class PolarDaoImpl { @PersistenceContext(unitName="PolarPU") protected EntityManager entityManager; -- } public class BearDaoImpl { @PersistenceContext(unitName="BearPU") protected EntityManager entityManager; -- } Checkout sample persistence.xml <?xml version="1.0" encoding="UTF-8"?> <persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"> <!-- Database 1 --> <persistence-unit name="PolarPU" transaction-type="RESOURCE_LOCAL"> ...
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