I am programming a Spring Boot Application in Connection to Camunda BPMN. Therefore I start my Application like following:
package com.example.workflow;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import java.io.IOException;
@SpringBootApplication
public class Application {
public static void main(String[] args) throws IOException {
Runnable serverZyklisch = new ServerZyklisch();
Runnable serverAzyklisch = new ServerAzyklisch();
for (int i = 0; i < 2; i++) {
new Thread(serverZyklisch).start();
new Thread(serverAzyklisch).start();
}
SpringApplication.run(Application.class);
}
}
I want to start my TCP-Servers in different Threads so that I can accept connection from each different Client. In ServerAzyklisch class I want to accept connection from each client. After that I want to instantiate Objects from Presse, Bohrer, etc.
My ServerAzyklisch class is like:
package com.example.workflow;
import org.camunda.bpm.engine.delegate.DelegateExecution;
import org.camunda.bpm.engine.delegate.JavaDelegate;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class ServerAzyklisch implements Runnable, JavaDelegate {
//new
int maxClients = 4;
ExecutorService threadPool = Executors.newFixedThreadPool(maxClients);
//
int count = 0;
private final ServerSocket ssocket;
static String param;
HexToByteConverter hexToByteConverter = new HexToByteConverter();
// 2 TCP Server starten Port 2000, Port 2001
public ServerAzyklisch(String Pparam) throws IOException {
ssocket = new ServerSocket(2000);
param = Pparam;
}
public ServerAzyklisch() throws IOException {
ssocket = new ServerSocket(2000);
}
public void run() {
byte[] buf = new byte[1];
System.out.println(param+"Paraaam");
InputStream in;
OutputStream out = null;
Socket socket;
//Thread immer aktiv
while(true){
try {
// Wartet auf Socket Verbindung
System.out.println("Server is listening on port "+ ssocket.getLocalPort());
socket = ssocket.accept();
Socket finalSocket = socket;
threadPool.submit(() -> {
// Communicate with clientSocket, for example:
try {
Presse p = new Presse(finalSocket);
Bohrer b = new Bohrer(finalSocket);
} catch (IOException e) {
e.printStackTrace();
}
});
count++;
socket.setSoLinger(true, 1000);
//Inputstream
in = socket.getInputStream();
//Outputstream
out = socket.getOutputStream();
//Datenpuffer deklarieren (anlegen)
byte []data = new byte[132];
} catch (IOException e) {
e.printStackTrace();
}catch (Exception e) {
e.printStackTrace();
}
}
}
@Override
public void execute(DelegateExecution delegateExecution) throws IOException {
//String dur = (String) delegateExecution.getVariable("durationglobal");
//param = dur;
}
}
I have following Camunda BPMN:
Now I want to pass these Objects to my Classes Bohrer, Presse,... I want that I am at BPMN at Service Task "Pressen" it executes execute-method in Presse.java. In this execute method I want to do something like p.sendMessage, so that I can send those Message via clientSockets InputStream/Outputstream to the client. Is this possible ? Because if I am Service Task Pressen, which execute the execute method, it want to instantiate a new Presse-Object with no parameters (default constructor). But I want to use the other Object, where clientSocket is passed as parameter.
This is my Presse.java for example:
import org.camunda.bpm.engine.delegate.DelegateExecution;
import org.camunda.bpm.engine.delegate.JavaDelegate;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
public class Presse implements JavaDelegate {
String param = "5";
private HexToByteConverter hexToByteConverter = new HexToByteConverter();
Socket socket;
InputStream in;
OutputStream out;
byte[]Pressen1hexdump110 = hexToByteConverter.hexStringToByteArray("33333333003d0064000600000004004001c9c78900010000006e0000000000000000000000000001000000000014000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"+param);
byte[]Pressen2hexdump = hexToByteConverter.hexStringToByteArray("3333333300400065000a00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000");
byte[]Pressen3hexdump = hexToByteConverter.hexStringToByteArray("3333333300400065001400000000004001c9c6e900010000006e000000000000000000000000000100000000001e00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000");
public Presse(){
}
public Presse(Socket clientSocket) throws IOException {
this.socket = clientSocket;
//Inputstream
in = socket.getInputStream();
//Outputstream
out = socket.getOutputStream();
}
public void sendMessage() throws IOException {
byte[] buf = new byte[1];
in.read(buf);
while (buf[0] != -1) {
out.write(Pressen1hexdump110);
out.write(Pressen2hexdump);
out.write(Pressen3hexdump);
//in.read(buf);
}
}
@Override
public void execute(DelegateExecution delegateExecution) throws Exception {
param = (String) delegateExecution.getVariable("durationglobal");
System.out.println("durationglobal: "+ param);
//sendMessage();
}
}
