design patterns : facade

design-pattern/gof/src/facade/after/Client.java

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+package facade.after;
+
+public class Client {
+
+    public static void main(String[] args) {
+        EmailSettings emailSettings = new EmailSettings();
+        emailSettings.setHost("127.0.0.1");
+
+        EmailSender emailSender = new EmailSender(emailSettings);
+
+        EmailMessage emailMessage = new EmailMessage();
+        emailMessage.setFrom("kim");
+        emailMessage.setTo("lee");
+        emailMessage.setSubject("오징어게임");
+        emailMessage.setText("밖은 더 지옥이더라고...");
+
+        emailSender.sendEmail(emailMessage);
+    }
+
+}

design-pattern/gof/src/facade/after/EmailMessage.java

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+package facade.after;
+
+public class EmailMessage {
+
+    private String from;
+    private String to;
+    private String subject;
+    private String text;
+
+    public String getFrom() {
+        return from;
+    }
+
+    public void setFrom(String from) {
+        this.from = from;
+    }
+
+    public String getTo() {
+        return to;
+    }
+
+    public void setTo(String to) {
+        this.to = to;
+    }
+
+    public String getSubject() {
+        return subject;
+    }
+
+    public void setSubject(String subject) {
+        this.subject = subject;
+    }
+
+    public String getText() {
+        return text;
+    }
+
+    public void setText(String text) {
+        this.text = text;
+    }
+}

design-pattern/gof/src/facade/after/EmailSender.java

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+package facade.after;
+
+import javax.mail.Message;
+import javax.mail.MessagingException;
+import javax.mail.Session;
+import javax.mail.Transport;
+import javax.mail.internet.InternetAddress;
+import javax.mail.internet.MimeMessage;
+import java.util.Properties;
+
+public class EmailSender {
+
+    private EmailSettings emailSettings;
+
+    public EmailSender(EmailSettings emailSettings) {
+        this.emailSettings = emailSettings;
+    }
+
+    public void sendEmail(EmailMessage emailMessage) {
+        Properties properties = System.getProperties();
+        properties.setProperty("mail.smtp.host", emailSettings.getHost());
+
+        Session session = Session.getDefaultInstance(properties);
+
+        try {
+            MimeMessage message = new MimeMessage(session);
+            message.setFrom(new InternetAddress(emailMessage.getFrom()));
+            message.addRecipient(Message.RecipientType.TO, new InternetAddress(emailMessage.getTo()));
+            message.setSubject(emailMessage.getSubject());
+            message.setText(emailMessage.getText());
+
+            Transport.send(message);
+        } catch (MessagingException e) {
+            e.printStackTrace();
+        }
+    }
+}

design-pattern/gof/src/facade/after/EmailSettings.java

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+package facade.after;
+
+public class EmailSettings {
+
+    private String host;
+
+    public String getHost() {
+        return host;
+    }
+
+    public void setHost(String host) {
+        this.host = host;
+    }
+}

design-pattern/gof/src/facade/before/Client.java

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+package facade.before;
+
+import javax.mail.Message;
+import javax.mail.MessagingException;
+import javax.mail.Session;
+import javax.mail.Transport;
+import javax.mail.internet.InternetAddress;
+import javax.mail.internet.MimeMessage;
+import java.util.Properties;
+
+public class Client {
+
+    public static void main(String[] args) {
+        String to = "keesun@whiteship.me";
+        String from = "whiteship@whiteship.me";
+        String host = "127.0.0.1";
+
+        Properties properties = System.getProperties();
+        properties.setProperty("mail.smtp.host", host);
+
+        Session session = Session.getDefaultInstance(properties);
+
+        try {
+            MimeMessage message = new MimeMessage(session);
+            message.setFrom(new InternetAddress(from));
+            message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
+            message.setSubject("Test Mail from Java Program");
+            message.setText("message");
+
+            Transport.send(message);
+        } catch (MessagingException e) {
+            e.printStackTrace();
+        }
+    }
+}