Build failed Qarukus graphQl app due to errors schema

[Bilel-NEJI]

Hi together, Hi @phillip-kruger
I'm buildng an quarkus / graphql application in order to consume it with an angular client in the future.
But it seems that the application fails to build due to errors related to schema building.
I did follow some tutos (using smallrye schema background building, @GraphQLAPI in the resource class + @query("allDevices") ). So I didn't build it using a .graphql file.
Since I'm not familiar with graphql / quarkus (I'm a student), how can I make sure that is schema is well built ?
Please find the code bellow.

---

public class DomesticDeviceInfoOutMiTO {

private int miDeviceId;
private String deviceName;
private int deviceState;
private int deviceType;

public int getMiDeviceId() {
    return miDeviceId;    }

public void setMiDeviceId(int miDeviceId) {
    this.miDeviceId = miDeviceId;    }

public String getDeviceName() {
    return deviceName;    }

public void setDeviceName(String deviceName) {
    this.deviceName = deviceName;    }

public int getDeviceState() {
    return deviceState;   }

public void setDeviceState(int deviceState) {
    this.deviceState = deviceState;    }

public int getDeviceType() {
    return deviceType;    }

public void setDeviceType(int deviceType) {
    this.deviceType = deviceType;    }

@Override
public String toString() {
    return "GetAllDomesticDevicesOutMTO{" +
            "miDeviceId=" + miDeviceId +
            ", deviceName='" + deviceName + '\'' +
            ", deviceState=" + deviceState +
            ", deviceType=" + deviceType +                '}';    }
public DomesticDeviceInfoOutMiTO() {    }
public DomesticDeviceInfoOutMiTO(int miDeviceId, String deviceName, int deviceState, int deviceType) {
    this.miDeviceId = miDeviceId;
    this.deviceName = deviceName;
    this.deviceState = deviceState;
    this.deviceType = deviceType; } }

public class GetAllDomesticDevicesOutMiTO {

private final List<DomesticDeviceInfoOutMiTO> devices;
public GetAllDomesticDevicesOutMiTO(List<DomesticDeviceInfoOutMiTO> devices) {    this.devices = devices;    }
public List<DomesticDeviceInfoOutMiTO> getDevices() {        return devices;    }

public class CustomerDevices {

private final Map<String, List<GetAllDomesticDevicesOutMiTO>> list;
public CustomerDevices(Map<String, List<GetAllDomesticDevicesOutMiTO>> list) {    this.list = list;    }
public Map<String, List<GetAllDomesticDevicesOutMiTO>> getList() {    return list;    } }

public interface McsPublicClientInterface {
Map<String, List> getAllDevices(); }

@ApplicationScoped
public class McsClientImpl implements McsPublicClientInterface {

@Override
public Map<String, List<GetAllDomesticDevicesOutMiTO>> getAllDevices() {

    //creating a List of mock devices in order to use it in the map
    List<DomesticDeviceInfoOutMiTO> devices = List.of(
        new DomesticDeviceInfoOutMiTO(1, "aaaa", 0,0),
        new DomesticDeviceInfoOutMiTO(2, "bbbb", 1, 1),
        new DomesticDeviceInfoOutMiTO(3, "cccc", 1, 0) );

    //creating two Objects of GetAllDomesticDevicesOutMiTO (with the same mock data) to iterate them into the map
    GetAllDomesticDevicesOutMiTO devicesUser1 = new GetAllDomesticDevicesOutMiTO(devices);
    GetAllDomesticDevicesOutMiTO devicesUser2 = new GetAllDomesticDevicesOutMiTO(devices);

    //creating a List (composed of the twp previous objects) in order to put it inside the map
    List<GetAllDomesticDevicesOutMiTO> devicesList = List.of(devicesUser1, devicesUser2);

    //creating an empty map to add a list of devices for one user
    Map<String, List<GetAllDomesticDevicesOutMiTO>> devicesPerUser = new HashMap<>();

    //iterating the keys & the values inside the map
    int i = 0;
    String j = String.valueOf(i);
    String k = "User" + j;
    devicesPerUser.put(k, devicesList);
    return devicesPerUser;  } }

@GraphQLAPI
public class McsClientResource {

@Inject
private McsClientImpl service;

@Query("allDevices")
@Description("Get all devices of users")
public CustomerDevices getAllDevices() {   CustomerDevices customerDevices = new CustomerDevices(service.getAllDevices());
    return customerDevices;    }   }

The error that I had is the fellowing:
./gradlew quarkusDev

Task :quarkusDev
Listening for transport dt_socket at address: 5005
Press [h] for more options>
Tests paused
Press [r] to resume testing, [h] for more options>
Press [r] to resume testing, [o] Toggle test output, [h] for more options>
2022-03-09 10:25:30,754 INFO [io.qua.arc.pro.BeanProcessor] (build-78) Found unrecommended usage of private members (use package-private instead) in application beans:
- @Inject field com.ma.resource.McsClientResource#service
2022-03-09 10:25:30,835 INFO [io.qua.dep.dev.IsolatedDevModeMain] (main) Attemp2022-03-09 10:25:30,971 INFO [org.jbo.threads] (main) JBoss Threads version 3.42022-03-09 10:25:31,774 ERROR [io.qua.dep.dev.IsolatedDevModeMain] (main) Failed to start quarkus: java.lang.RuntimeException: io.quarkus.builder.BuildException: Build failure: Build failed due to errors
[error]: Build step io.quarkus.smallrye.graphql.deployment.SmallRyeGraphQLProcessor#buildExecutionService threw an exception: java.lang.NullPointerException
at io.smallrye.graphql.schema.creator.ReferenceCreator.getReference(ReferenceCreator.java:325)
at io.smallrye.graphql.schema.creator.ReferenceCreator.collectParametrizedTypes(ReferenceCreator.java:415)
at io.smallrye.graphql.schema.creator.ReferenceCreator.getReference(ReferenceCreator.java:367)
at io.smallrye.graphql.schema.creator.ReferenceCreator.getReference(ReferenceCreator.java:331)
at io.smallrye.graphql.schema.creator.ReferenceCreator.createReferenceForPojoField(ReferenceCreator.java:163)
at io.smallrye.graphql.schema.creator.FieldCreator.createFieldForPojo(FieldCreator.java:84)
at io.smallrye.graphql.schema.creator.type.TypeCreator.addFields(TypeCreator.java:61)
at io.smallrye.graphql.schema.creator.type.AbstractCreator.create(AbstractCreator.java:66)
at io.smallrye.graphql.schema.creator.type.TypeCreator.create(TypeCreator.java:33)
at io.smallrye.graphql.schema.creator.type.AbstractCreator.create(AbstractCreator.java:31)
at io.smallrye.graphql.schema.SchemaBuilder.createAndAddToSchema(SchemaBuilder.java:219)
at io.smallrye.graphql.schema.SchemaBuilder.addTypesToSchema(SchemaBuilder.java:153)
at io.smallrye.graphql.schema.SchemaBuilder.generateSchema(SchemaBuilder.java:121)
at io.smallrye.graphql.schema.SchemaBuilder.build(SchemaBuilder.java:86)
at io.quarkus.smallrye.graphql.deployment.SmallRyeGraphQLProcessor.buildExecutionService(SmallRyeGraphQLProcessor.java:224)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at io.quarkus.deployment.ExtensionLoader$2.execute(ExtensionLoader.java:882)
at io.quarkus.builder.BuildContext.run(BuildContext.java:277)
at org.jboss.threads.ContextHandler$1.runWith(ContextHandler.java:18)
at org.jboss.threads.EnhancedQueueExecutor$Task.run(EnhancedQueueExecutor.java:2449)
at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1478)
at java.base/java.lang.Thread.run(Thread.java:829)
at org.jboss.threads.JBossThread.run(JBossThread.java:501)

    at io.quarkus.runner.bootstrap.AugmentActionImpl.runAugment(AugmentActionImpl.java:330)
    at io.quarkus.runner.bootstrap.AugmentActionImpl.createInitialRuntimeApplication(AugmentActionImpl.java:252)
    at io.quarkus.runner.bootstrap.AugmentActionImpl.createInitialRuntimeApplication(AugmentActionImpl.java:60)
    at io.quarkus.deployment.dev.IsolatedDevModeMain.firstStart(IsolatedDevModeMain.java:92)
    at io.quarkus.deployment.dev.IsolatedDevModeMain.accept(IsolatedDevModeMain.java:455)
    at io.quarkus.deployment.dev.IsolatedDevModeMain.accept(IsolatedDevModeMain.java:66)
    at io.quarkus.bootstrap.app.CuratedApplication.runInCl(CuratedApplication.java:140)
    at io.quarkus.bootstrap.app.CuratedApplication.runInAugmentClassLoader(CuratedApplication.java:96)
    at io.quarkus.deployment.dev.DevModeMain.start(DevModeMain.java:132)
    at io.quarkus.deployment.dev.DevModeMain.main(DevModeMain.java:62)

Caused by: io.quarkus.builder.BuildException: Build failure: Build failed due to errors
[error]: Build step io.quarkus.smallrye.graphql.deployment.SmallRyeGraphQLProcessor#buildExecutionService threw an exception: java.lang.NullPointerException
at io.smallrye.graphql.schema.creator.ReferenceCreator.getReference(ReferenceCreator.java:325)
at io.smallrye.graphql.schema.creator.ReferenceCreator.collectParametrizedTypes(ReferenceCreator.java:415)
at io.smallrye.graphql.schema.creator.ReferenceCreator.getRef

[phillip-kruger]

Can you share a reproducer?

[Bilel-NEJI]

Sorry! but what do you mean by reproducer?

[phillip-kruger]

A small application that is runnable that hightlight the issue.

[phillip-kruger]

Either attached here or as a GH repo

[Bilel-NEJI]

Hi Phillip, thank you,
Here is the link: https://github.com/Bilel-NEJI/back-mcs-thirdparty
I'm still using the auto. generated schema

[phillip-kruger]

Hi @Bilel-NEJI
Your reproducer works perfectly for me. Not sure why. What version of Java are you using ?

[Bilel-NEJI]

Hi @phillip-kruger
The java version that I use is : java 11.0.13 2021-10-19 LTS
Now it's running quite well for me after making the changes below:
#DomesticDeviceInfoOutMiTO: still the same
#GetAllDomesticDevicesOutMiTO: still the same
#CustomerDevices: this class I removed
#the McsClientImpl has some changes:

@ApplicationScoped
public class McsClientImpl implements McsPublicClientInterface {
private static final Logger LOG = Logger.getLogger(McsClientImpl.class);

@Override
public Map<String, GetAllDomesticDevicesOutMiTO> getAllDevices() {
LOG.info("Getting the list of all devices of all users ");
    //creating a List of mock devices in order to use it in the map
    List<DomesticDeviceInfoOutMiTO> devices = List.of(
        new DomesticDeviceInfoOutMiTO(1, "Food collector", 0,0),
        new DomesticDeviceInfoOutMiTO(2, "Cleaning Robot", 1, 1),
        new DomesticDeviceInfoOutMiTO(3, "Smart Fridge", 1, 0)
    );

    //creating two Objects of GetAllDomesticDevicesOutMiTO (with the same mock data) to iterate them into the map
    GetAllDomesticDevicesOutMiTO devicesUser1 = new GetAllDomesticDevicesOutMiTO(devices);
    GetAllDomesticDevicesOutMiTO devicesUser2 = new GetAllDomesticDevicesOutMiTO(devices);

    //creating a List (composed of the twp previous objects) in order to put it inside the map

    //creating an empty map to add a list of devices for one user
    Map<String, GetAllDomesticDevicesOutMiTO> devicesPerUser = new HashMap<>();

    //filling the map (key and value) with data for three users
    Set<String> keys = new LinkedHashSet<>();
    keys.add("User0");
    keys.add("User1");
    keys.add("User2");
    keys.add("User3");

    Iterator<String> itr = keys.iterator();

    while (itr.hasNext()) {
          devicesPerUser.put(itr.next(), devicesUser1);
    }
    return devicesPerUser;
    }

}

#McsPublicClientInterface has some changes:

public interface McsPublicClientInterface {
Map<String, GetAllDomesticDevicesOutMiTO> getAllDevices();   }

#McsClientResource has some changes:

@GraphQLApi
public class McsClientResource {

@Inject
private McsClientImpl service;

@Query("allDevices")
@Description("Get all devices of users")
public GetAllDomesticDevicesOutMiTO getAllDevices() {
    return  service.getAllDevices().get("User0");
}

}

but something I don't understand why when I type the following:
#http://localhost:8080/graphql -> I have the message "This page is not working".?
#http://localhost:8080/graphql-ui -> "Resource not found" message?

knowing that when I consume this API with Apollo; I can find my response in the console.log.

[phillip-kruger]

The default endpoint for executing graphql operations is /graphql - that is why the above apollo example is working. The schema and the UI is by default under /q/**. Easiest way is to go to /q/dev when running in dev mode and use the GraphQL links there.

http://localhost:8080/q/graphql
http://localhost:8080/q/graphql-ui

[Bilel-NEJI]

Hi @phillip-kruger
I trying to query with a specific "id" or other field ("deviceName", "deviceState", etc ), like the exemple in the photo below, but it seems not working (an error appears). And I need to specify the "miDeviceId" field in order to use it in the frontend (angular)
How should I do ?

[phillip-kruger]

Yes that method, I would just add an Optional parameter, so if empty, no filter, else filter. You don't need the @name except if you want to name if different in graphql than in java

[Bilel-NEJI]

I added two optional parameters "optUserId" & "optState" in that mehtod ("optState" not used yet in the query).
The "optUserId" will be used to pass the value "User0" (instead of / to replace the previous code)

graphql request's result was, looks like the picture below

@Query("allDevices")
@Description("Get all devices of users")
public GetAllDomesticDevicesOutMieleTO getAllDevices(Optional<Integer> optState, Optional<String> optUserId) {
    return  service.getAllDevices().get(optUserId);    }

Was my optional paramter' use correct ?

[phillip-kruger]

@Query("allDevices")
@Description("Get all devices of users")
public GetAllDomesticDevicesOutMieleTO getAllDevices(Optional<Integer> optState, Optional<String> optUserId) {
    if(!optUserId.isEmpty()){
        return  service.getAllDevices().get(optUserId.get());    // Here you need to get the optional value
    } else {
        return  service.getAllDevices(); // Might return wrong type here ?
    }
}

[Bilel-NEJI]

Thank you @phillip-kruger, really so kind from you
Yes it works, for the "else" part; I return a default / generic result

[phillip-kruger]

Great !