topic Geoprocessor and AsyncTask in ArcGIS Runtime SDK for Android Questions

Geoprocessor and AsyncTask

ÅsaWegelius — Wed, 04 Mar 2015 14:46:13 GMT

Hello, I am trying to use a Geoprocessor in an app to consume an aynchronous service. First I tried with Handler as in https://community.esri.com/thread/51073. But I could not figure out how to get it to work in a Fragment. So I decided to use AsyncTask instead. I get the right error message if I use wrong credentials and the job submits but then it stucks at jobstatus submitted.

This is the input parameters:

Parameter: VehicleID
Data Type: GPLong
Display Name: VehicleID
Description: VID
Direction: esriGPParameterDirectionInput
Default Value: 1
Parameter Type: esriGPParameterTypeRequired
Category:

Parameter: CalculationID
Data Type: GPLong
Display Name CalculationID
Description: CID
Direction: esriGPParameterDirectionInput
Default Value: 0
Parameter Type: esriGPParameterTypeRequired
Category:

This is how I start the job:

    public void sendJob(String username, String password, long id) throws Exception{
        UserCredentials creds = new UserCredentials();
        creds.setUserAccount(username, password);
        ArrayList<GPParameter> parameters = new ArrayList<GPParameter>();
        GPLong idParam = new GPLong("VehicleID");
        idParam.setValue(id);
        GPLong calcParam = new GPLong("CalculationID");
        calcParam.setValue(0);
        parameters.add(idParam);
        parameters.add(calcParam);
        Geoprocessor gpTask = new Geoprocessor(URL, creds);
        if(downloadRouteTask != null){
            if(downloadRouteTask.getStatus() == AsyncTask.Status.RUNNING){
                downloadRouteTask.cancel(true);
            }
        }
        downloadRouteTask = new DownloadRouteTask(gpTask, status);
        downloadRouteTask.execute(parameters);
        //submitJobAndPolling(gpTask, parameters);
    }

And this is the AsyncTask class:

    private class DownloadRouteTask extends AsyncTask<ArrayList<GPParameter>, String, GPJobParameter[]> {
        private Geoprocessor gpTask;
        private TextView textView;
        private String msg = "";
        public DownloadRouteTask(Geoprocessor gpTask, TextView textView){
            this.gpTask = gpTask;
            this.textView = textView;
        }
        @Override
        protected GPJobParameter[] doInBackground(ArrayList<GPParameter>... parameters) {
            GPJobParameter[] outParams = null;
            try {
                GPJobResource gpJobResource = gpTask.submitJob(parameters[0]);
                System.out.println("Polling thread is: " + Thread.currentThread().getName());
                boolean done = false;
                while(!done) {
                    if(isCancelled()){
                        break;
                    }
                    GPJobResource.JobStatus jobStatus = gpJobResource.getJobStatus();
                    switch (jobStatus) {
                        case CANCELLED:
                            msg = "The job has been cancelled based on the client's request. ";
                            done = true;
                            break;
                        case CANCELLING:
                            System.out.println("CANCELLING value on switch");
                            break;
                        case DELETED:
                            textView.setText("The job has been deleted. ");
                            done = true;
                            break;
                        case DELETING:
                            System.out.println("DELETING value on switch");
                            break;
                        case EXECUTING:
                            System.out.println("EXECUTING value on switch");
                            break;
                        case FAILED:
                            msg = "The job execution has failed because of invalid parameters or other geoprocessing failures. ";
                            done = true;
                            break;
                        case NEW_JOB:
                            System.out.println("NEW_JOB value on switch");
                            break;
                        case SUBMITTED:
                            System.out.println("SUBMITTED value on switch");
                            break;
                        case SUCCEEDED:
                            msg = "The job has completed successfully and the output results are available. ";
                            outParams = gpJobResource.getOutputParameters();
                            done = true;
                            break;
                        case TIMED_OUT:
                            msg = "The job execution has timed out. ";
                            done = true;
                            break;
                        case WAITING:
                            System.out.println("WAITING value on switch");
                            break;
                        default:
                            System.out.println("default value on switch");
                    }
                    try {
                        Thread.sleep(4000);
                    } catch (InterruptedException e) {
                    }
                }
            }
            catch(EsriSecurityException e){
                if(e.getCode() == -10001){
                    msg = "There were no user with that name and password.";
                    return null;
                }
            }
            catch (Exception e) {
                msg = e.getLocalizedMessage();
                e.printStackTrace();
            }
            return outParams;
        }
        @Override
        protected void onPostExecute(GPJobParameter[] result) {
            if(msg.length() > 0){
                textView.setTextColor(getResources().getColor(R.color.text_dark_grey));
                textView.setText(msg);
            }
            if(result != null) {
                if ( result.length > 0) {
                } else {
                    textView.setTextColor(getResources().getColor(R.color.text_dark_grey));
                    textView.setText("There were no route with that id");
                }
            }
        }
        // If the cancellation occurs, set the message informing so
        @Override
        protected void onCancelled() {
            textView.setTextColor(getResources().getColor(R.color.text_orange));
             textView.setText("Job cancelled");
            super.onCancelled();
        }
        @Override
        public void onPreExecute(){
            textView.setTextColor(getResources().getColor(R.color.text_dark_grey));
            textView.setText("Fetching the route" );
        }
    }

I have made an app in Objective-C that does the same and it works so the service works.

Re: Geoprocessor and AsyncTask

ÅsaWegelius — Thu, 05 Mar 2015 14:26:55 GMT

I gave up and investigated how to make the handler work instead and found a snippet that solved the issue I had.

I put this in the onCreate:

        if (android.os.Build.VERSION.SDK_INT > 9)
        {
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
            StrictMode.setThreadPolicy(policy);
        }

and I start the job:

        Geoprocessor gpTask = new Geoprocessor(URL, creds);
        //Geoprocessor gpTask = new Geoprocessor(URL);
        if(handler != null){
            handler.removeCallbacks(r);
        }
        handler = new Handler();
        submitJobAndPolling(gpTask, parameters);

and this is the method :

   void submitJobAndPolling(final Geoprocessor gpTask,
                             List<GPParameter> params) {
        try {
            GPJobResource gpJobResource = gpTask.submitJob(params);
            GPJobResource.JobStatus jobstatus = gpJobResource.getJobStatus();
            final String jobid = gpJobResource.getJobID();
            status.setTextColor(getResources().getColor(R.color.text_dark_grey));
            GPLong routeNo = (GPLong)params.get(0);
            status.setText("Fetching route " + routeNo.getValue());
            if (jobstatus != GPJobResource.JobStatus.SUCCEEDED) {
                handler.postDelayed(r = new Runnable() {
                    @Override
                    public void run() {
                        try {
                            GPJobResource gpJobResource1 = gpTask.checkJobStatus(jobid);
                            boolean jobcomplete = false;
                            GPJobResource.JobStatus jobStatus = gpJobResource1.getJobStatus();
                            switch (jobStatus) {
                                case CANCELLED:
                                    status.setTextColor(getResources().getColor(R.color.text_dark_grey));
                                    status.setText("The job has been cancelled based on the client's request. ");
                                    jobcomplete = true;
                                    break;
                                case CANCELLING:
                                    break;
                                case DELETED:
                                    status.setTextColor(getResources().getColor(R.color.text_dark_grey));
                                    status.setText("The job has been deleted. ");
                                    jobcomplete = true;
                                    break;
                                case DELETING:
                                    break;
                                case EXECUTING:
                                    break;
                                case FAILED:
                                    status.setTextColor(getResources().getColor(R.color.text_dark_grey));
                                    status.setText("The job execution has failed because of invalid parameters or other geoprocessing failures. ");
                                    jobcomplete = true;
                                    break;
                                case NEW_JOB:
                                    break;
                                case SUBMITTED:
                                    break;
                                case SUCCEEDED:
                                    status.setTextColor(getResources().getColor(R.color.text_dark_grey));
                                    status.setText("Added the route! ");
                                    jobcomplete = true;
                                    break;
                                case TIMED_OUT:
                                    status.setTextColor(getResources().getColor(R.color.text_dark_grey));
                                    status.setText("The job execution has timed out. ");
                                    jobcomplete = true;
                                    break;
                                case WAITING:
                                    break;
                                default:
                                    break;
                            }
                            if (jobcomplete) {
                                if (jobStatus == GPJobResource.JobStatus.SUCCEEDED) {
                                    System.out.println("GP succeded");
                                }else {
                                    System.out.println("GP failed");
                                }
                            } else {
                                handler.postDelayed(this, 5000);
                            }
                        } catch (Exception e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }
                    }
                }, 4000);
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

It works fine now.