CCDP - Template Method Pattern

readme.md

CCDP - Template Method Pattern

Nama: Dimas Miftahul Huda

NIM: 10118087

Kelas: CCDP-1

Langkah Pembuatan

1. Buat package channel
2. Channel.java di dalam package channel
3. Email.java di dalam package channel
4. WhatsApp.java di dalam package channel
5. App.java di luar package

App.java

import channel.Email;
import channel.Channel;
import channel.WhatsApp;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class App {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        Channel channel = null;
        System.out.print("Masukkan nama pengguna: ");
        String nama = reader.readLine();
        System.out.print("Masukkan kata sandi: ");
        String sandi = reader.readLine();

        System.out.print("Masukkan pesan: ");
        String pesan = reader.readLine();

        System.out.println("""

                Pilih channel yang digunakan untuk mengirim pesan.
                1 - Email
                2 - WhatsApp""");
        int pilihan = Integer.parseInt(reader.readLine());

        if (pilihan == 1) {
            channel = new Email(nama, sandi);
        } else if (pilihan == 2) {
            channel = new WhatsApp(nama, sandi);
        }
        channel.post(pesan);
    }
}

Channel.java

package channel;

public abstract class Channel {
    String nama;
    String sandi;

    Channel() {}

    public boolean post(String pesan) {
        if (logIn(this.nama, this.sandi)) {
            boolean result =  sendData(pesan.getBytes());
            logOut();
            return result;
        }
        return false;
    }

    abstract boolean logIn(String nama, String sandi);
    abstract boolean sendData(byte[] data);
    abstract void logOut();
}

Email.java

package channel;

public class Email extends Channel {
    public Email(String nama, String sandi) {
        this.nama = nama;
        this.sandi = sandi;
    }

    public boolean logIn(String nama, String sandi) {
        System.out.println("\nMemeriksa identitas pengguna");
        System.out.println("Nama: " + this.nama);
        System.out.print("Sandi: ");
        for (int i = 0; i < this.sandi.length(); i++) {
            System.out.print("*");
        }
        simulateNetworkLatency();
        System.out.println("\n\nLogin Email berhasil");
        return true;
    }

    public boolean sendData(byte[] data) {
        boolean messagePosted = true;
        if (messagePosted) {
            System.out.println("Pesan: '" + new String(data) + "' telah terkirim melalui Email");
            return true;
        } else {
            return false;
        }
    }

    public void logOut() {
        System.out.println("Pengguna: '" + nama + "'telah logout dari Email");
    }

    private void simulateNetworkLatency() {
        try {
            int i = 0;
            System.out.println();
            while (i < 10) {
                System.out.print(".");
                Thread.sleep(500);
                i++;
            }
        } catch (InterruptedException ex) {
            ex.printStackTrace();
        }
    }
}

WhatsApp.java

package channel;

public class WhatsApp extends Channel {

    public WhatsApp(String nama, String sandi) {
        this.nama = nama;
        this.sandi = sandi;
    }

    public boolean logIn(String nama, String sandi) {
        System.out.println("\nMemeriksa identitas pengguna");
        System.out.println("Nama: " + this.nama);
        System.out.print("Sandi: ");
        for (int i = 0; i < this.sandi.length(); i++) {
            System.out.print("*");
        }
        simulateNetworkLatency();
        System.out.println("\n\nLogin WhatsApp berhasil");
        return true;
    }

    public boolean sendData(byte[] data) {
        boolean messagePosted = true;
        if (messagePosted) {
            System.out.println("Pesan: '" + new String(data) + "' telah terkirim melalui WhatsApp");
            return true;
        } else {
            return false;
        }
    }

    public void logOut() {
        System.out.println("Pengguna: '" + nama + "' telah logout dari WhatsApp");
    }

    private void simulateNetworkLatency() {
        try {
            int i = 0;
            System.out.println();
            while (i < 10) {
                System.out.print(".");
                Thread.sleep(500);
                i++;
            }
        } catch (InterruptedException ex) {
            ex.printStackTrace();
        }
    }
}