API orchestration tool

Camunda 7 Topics Discussion & Questions
3

Thank you for that information. I have a couple of questions to that though.

This is the java code I came up with to call API1.

package org.camunda.bpm.orch;
import org.camunda.bpm.engine.delegate.BpmnError;
import org.camunda.bpm.engine.delegate.DelegateExecution;
import org.camunda.bpm.engine.delegate.JavaDelegate;
import java.util.logging.Logger;
import org.json.simple.JSONObject;
import org.json.simple.JSONArray;
import org.json.simple.parser.ParseException;
import org.json.simple.parser.JSONParser;
import org.camunda.bpm.client.ExternalTaskClient;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.Reader;
import java.net.URL;
import java.nio.charset.Charset;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URLConnection;
import java.util.ArrayList;
import java.net.;
import java.io.;
import java.util.*;
import javax.inject.Named;

@Named(“api1call”)
public class orchDelegate implements JavaDelegate{

public void execute(DelegateExecution execution) throws Exception {
	try(InputStream is=new URL("https://qrng.anu.edu.au/API/jsonI.php?length=1&type=uint16").openStream()) {
	 	BufferedReader rd = new BufferedReader(new InputStreamReader(is, Charset.forName("UTF-8")));
	 	StringBuilder sb=new StringBuilder();
	 	int cp;
	 	while((cp=rd.read())!=-1) {
	 		sb.append((char)cp);
	 	}
	 	String jsonText = sb.toString();
     	JSONObject json = new JSONObject();
     	json.put("jsonText", jsonText);
     	System.out.println(json.toString());
     	Object retVal=json.get(2);
        System.out.println(retVal);
        is.close();
		}
	catch(Exception e){
		e.printStackTrace();
	}
	
}

}

I’m basically calling the API in this code, and have 2 more classes orchDelegate2 and orchDelegate3 to call API 2 and API3 in similar manners.

  1. I’m a little confused about where exactly I access the return value of API1 and where I apply the conditional logic? Can I basically do this on the camunda modeler, or do I need additional code for it in my java program?

  2. I also didn’t really get any resources for actually communicating variables between the program and the modeler. I need to basically be able to input and output stuff on the cockpit, and I’m not sure how to.

Thanks for any help once again!