[PLC4X-69] ADS subscription data not present

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Cannot Reproduce
• Affects Version/s: 0.2.0
• Component/s: Driver-ADS
• Environment: JDK 8 ; Windows 10 ; TwinCAT3 4022.25
• Assignee: Sebastian Rühl
• Reporter: Bjoern Haverland
• Created: 25/Oct/18 09:28
• Updated: 01/May/20 15:04
• Resolved: 01/May/20 15:04

Description

The PlcSubscriptionEvent Object is available, but if I try to get the field I just get null.

Also PlcSubscriptionEvent.getFieldNames() returns null.

 

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package org.apache.plc4x.java.ads;



import org.apache.plc4x.java.PlcDriverManager;

import org.apache.plc4x.java.api.PlcConnection;

import org.apache.plc4x.java.api.messages.*;

import org.apache.plc4x.java.api.model.PlcConsumerRegistration;



import java.util.Collection;

import java.util.List;

import java.util.concurrent.CompletableFuture;

import java.util.concurrent.TimeUnit;

import java.util.stream.Collectors;



public class ManualPlc4XAdsTest {



public static void main(String... args) throws Exception {

String connectionUrl;

if (args.length > 0 && "serial".equalsIgnoreCase(args[0])) {

System.out.println("Using serial");

connectionUrl = "ads:serial:///dev/ttys003/10.10.64.40.1.1:851/10.10.56.23.1.1:30000";

} else {

System.out.println("Using tcp");

connectionUrl = "ads:tcp://10.10.64.40/10.10.64.40.1.1:851/10.10.56.23.1.1:30000";

}

// TODO: temporary workaround

Thread.currentThread().setUncaughtExceptionHandler((t, e) -> {

System.err.println(t + " - " + e.getMessage());

e.printStackTrace(System.err);

System.exit(1);

});

try (PlcConnection plcConnection = new PlcDriverManager().getConnection(connectionUrl)) {

System.out.println("PlcConnection " + plcConnection);



PlcReadRequest.Builder readRequestBuilder = plcConnection.readRequestBuilder().orElseThrow(RuntimeException::new);

PlcReadRequest readRequest = readRequestBuilder.addItem("station", "Allgemein_S2.Station:BYTE").build();

CompletableFuture<? extends PlcReadResponse> response = readRequest.execute();

PlcReadResponse readResponse = response.get();

System.out.println("Response " + readResponse);

Collection<Integer> stations = readResponse.getAllIntegers("station");

stations.forEach(System.out::println);



// 2. We build a subscription

PlcSubscriptionRequest.Builder subscriptionRequestBuilder = plcConnection.subscriptionRequestBuilder().orElseThrow(RuntimeException::new);

PlcSubscriptionRequest subscriptionRequest = subscriptionRequestBuilder.addChangeOfStateField("stationChange", "Allgemein_S2.Station:BYTE").build();

PlcSubscriptionResponse plcSubscriptionResponse = subscriptionRequest.execute().get();

Consumer<PlcSubscriptionEvent> evtConsumer = (c) -> {
System.out.println(c.getFieldNames()); //prints null
Collection<Integer> s = c.getAllIntegers("stationChange");

s.forEach(System.out::println); //prints null
}

List<PlcConsumerRegistration> plcConsumerRegistrations = plcSubscriptionResponse.getSubscriptionHandles().stream()

.map(plcSubscriptionHandle -> plcSubscriptionHandle.register(evtConsumer))

.collect(Collectors.toList());



// Now we wait a bit

TimeUnit.SECONDS.sleep(5);



// we unregister the listener

plcConsumerRegistrations.forEach(PlcConsumerRegistration::unregister);



// we unsubscribe at the plc

PlcUnsubscriptionRequest.Builder unsubscriptionRequestBuilder = plcConnection.unsubscriptionRequestBuilder().orElseThrow(RuntimeException::new);

PlcUnsubscriptionRequest unsubscriptionRequest = unsubscriptionRequestBuilder.addHandles(plcSubscriptionResponse.getSubscriptionHandles()).build();

CompletableFuture<PlcUnsubscriptionResponse> unsubscriptionResponse = unsubscriptionRequest.execute();



unsubscriptionResponse

.get(5, TimeUnit.SECONDS);

System.out.println(unsubscriptionResponse);

}

System.exit(0);

}

}