Examples with DefaultStreamObserver org.ballerinalang.net.grpc.stubs.DefaultStreamObserver used on opensource projects

Example 1 with DefaultStreamObserver

use of org.ballerinalang.net.grpc.stubs.DefaultStreamObserver in project ballerina by ballerina-lang.

the class StreamingExecute method execute.

@Override
public void execute(Context context) {
    BStruct serviceStub = (BStruct) context.getRefArgument(SERVICE_STUB_REF_INDEX);
    if (serviceStub == null) {
        notifyErrorReply(context, "Error while getting connector. gRPC Client connector " + "is not initialized properly");
        return;
    }
    Object connectionStub = serviceStub.getNativeData(SERVICE_STUB);
    if (connectionStub == null) {
        notifyErrorReply(context, "Error while getting connection stub. gRPC Client connector " + "is not initialized properly");
        return;
    }
    String methodName = context.getStringArgument(0);
    if (methodName == null) {
        notifyErrorReply(context, "Error while processing the request. RPC endpoint doesn't " + "set properly");
        return;
    }
    com.google.protobuf.Descriptors.MethodDescriptor methodDescriptor = MessageRegistry.getInstance().getMethodDescriptor(methodName);
    if (methodDescriptor == null) {
        notifyErrorReply(context, "No registered method descriptor for '" + methodName + "'");
        return;
    }
    if (connectionStub instanceof GrpcNonBlockingStub) {
        GrpcNonBlockingStub grpcNonBlockingStub = (GrpcNonBlockingStub) connectionStub;
        BTypeDescValue serviceType = (BTypeDescValue) context.getRefArgument(1);
        Service callbackService = BLangConnectorSPIUtil.getServiceFromType(context.getProgramFile(), getTypeField(serviceType));
        try {
            MethodDescriptor.MethodType methodType = getMethodType(methodDescriptor);
            DefaultStreamObserver responseObserver = new DefaultStreamObserver(callbackService);
            StreamObserver<Message> requestSender;
            if (methodType.equals(MethodDescriptor.MethodType.CLIENT_STREAMING)) {
                requestSender = grpcNonBlockingStub.executeClientStreaming(responseObserver, methodName);
            } else if (methodType.equals(MethodDescriptor.MethodType.BIDI_STREAMING)) {
                requestSender = grpcNonBlockingStub.executeBidiStreaming(responseObserver, methodName);
            } else {
                notifyErrorReply(context, "Error while executing the client call. Method type " + methodType.name() + " not supported");
                return;
            }
            BStruct connStruct = createStruct(context, CLIENT_CONNECTION);
            connStruct.addNativeData(REQUEST_SENDER, requestSender);
            connStruct.addNativeData(REQUEST_MESSAGE_DEFINITION, methodDescriptor.getInputType());
            BStruct clientEndpoint = (BStruct) serviceStub.getNativeData(CLIENT_END_POINT);
            clientEndpoint.addNativeData(CLIENT_CONNECTION, connStruct);
            context.setReturnValues(clientEndpoint);
        } catch (RuntimeException | GrpcClientException e) {
            notifyErrorReply(context, "gRPC Client Connector Error :" + e.getMessage());
        }
    }
}

Example 2 with DefaultStreamObserver

use of org.ballerinalang.net.grpc.stubs.DefaultStreamObserver in project ballerina by ballerina-lang.

the class NonBlockingExecute method execute.

@Override
public void execute(Context context) {
    BStruct serviceStub = (BStruct) context.getRefArgument(SERVICE_STUB_REF_INDEX);
    if (serviceStub == null) {
        notifyErrorReply(context, "Error while getting connector. gRPC Client connector is " + "not initialized properly");
        return;
    }
    Object connectionStub = serviceStub.getNativeData(SERVICE_STUB);
    if (connectionStub == null) {
        notifyErrorReply(context, "Error while getting connection stub. gRPC Client connector " + "is not initialized properly");
        return;
    }
    String methodName = context.getStringArgument(0);
    if (methodName == null) {
        notifyErrorReply(context, "Error while processing the request. RPC endpoint doesn't " + "set properly");
        return;
    }
    com.google.protobuf.Descriptors.MethodDescriptor methodDescriptor = MessageRegistry.getInstance().getMethodDescriptor(methodName);
    if (methodDescriptor == null) {
        notifyErrorReply(context, "No registered method descriptor for '" + methodName + "'");
        return;
    }
    if (connectionStub instanceof GrpcNonBlockingStub) {
        BValue payloadBValue = context.getRefArgument(1);
        Message requestMsg = MessageUtils.generateProtoMessage(payloadBValue, methodDescriptor.getInputType());
        GrpcNonBlockingStub grpcNonBlockingStub = (GrpcNonBlockingStub) connectionStub;
        BTypeDescValue serviceType = (BTypeDescValue) context.getRefArgument(2);
        Service callbackService = BLangConnectorSPIUtil.getServiceFromType(context.getProgramFile(), getTypeField(serviceType));
        try {
            MethodDescriptor.MethodType methodType = getMethodType(methodDescriptor);
            if (methodType.equals(MethodDescriptor.MethodType.UNARY)) {
                grpcNonBlockingStub.executeUnary(requestMsg, new DefaultStreamObserver(callbackService), methodName);
            } else if (methodType.equals(MethodDescriptor.MethodType.SERVER_STREAMING)) {
                grpcNonBlockingStub.executeServerStreaming(requestMsg, new DefaultStreamObserver(callbackService), methodName);
            } else {
                notifyErrorReply(context, "Error while executing the client call. Method type " + methodType.name() + " not supported");
                return;
            }
            context.setReturnValues();
            return;
        } catch (RuntimeException | GrpcClientException e) {
            notifyErrorReply(context, "gRPC Client Connector Error :" + e.getMessage());
            return;
        }
    }
    notifyErrorReply(context, "Error while processing the request message. Connection Sub " + "type not supported");
}