Examples with Resource org.ballerinalang.connector.api.Resource used on opensource projects

Example 16 with Resource

use of org.ballerinalang.connector.api.Resource in project ballerina by ballerina-lang.

the class BidirectionalStreamingListener method invoke.

@Override
public StreamObserver<Message> invoke(StreamObserver<Message> responseObserver) {
    Resource onOpen = resourceMap.get(MessageConstants.ON_OPEN_RESOURCE);
    List<ParamDetail> paramDetails = onOpen.getParamDetails();
    BValue[] signatureParams = new BValue[paramDetails.size()];
    signatureParams[0] = getConnectionParameter(onOpen, responseObserver);
    CallableUnitCallback callback = new GrpcCallableUnitCallBack(responseObserver, Boolean.FALSE);
    Executor.submit(onOpen, callback, null, null, signatureParams);
    return new StreamObserver<Message>() {

        @Override
        public void onNext(Message value) {
            Resource onMessage = resourceMap.get(MessageConstants.ON_MESSAGE_RESOURCE);
            List<ParamDetail> paramDetails = onMessage.getParamDetails();
            BValue[] signatureParams = new BValue[paramDetails.size()];
            signatureParams[0] = getConnectionParameter(onMessage, responseObserver);
            BValue requestParam = getRequestParameter(onMessage, value);
            if (requestParam != null) {
                signatureParams[1] = requestParam;
            }
            CallableUnitCallback callback = new GrpcCallableUnitCallBack(responseObserver, isEmptyResponse());
            Executor.submit(onMessage, callback, null, null, signatureParams);
        }

        @Override
        public void onError(Throwable t) {
            Resource onError = resourceMap.get(MessageConstants.ON_ERROR_RESOURCE);
            if (onError == null) {
                String message = "Error in listener service definition. onError resource does not exists";
                LOG.error(message);
                throw new RuntimeException(message);
            }
            List<ParamDetail> paramDetails = onError.getParamDetails();
            BValue[] signatureParams = new BValue[paramDetails.size()];
            signatureParams[0] = getConnectionParameter(onError, responseObserver);
            if (paramDetails.size() != 2) {
                String message = "Error in onError resource definition. It must have two input params, but have " + paramDetails.size();
                LOG.error(message);
                throw new RuntimeException(message);
            }
            BType errorType = paramDetails.get(1).getVarType();
            BStruct errorStruct = MessageUtils.getConnectorError((BStructType) errorType, t);
            signatureParams[1] = errorStruct;
            CallableUnitCallback callback = new GrpcCallableUnitCallBack(responseObserver, Boolean.FALSE);
            Executor.submit(onError, callback, null, null, signatureParams);
        }

        @Override
        public void onCompleted() {
            Resource onCompleted = resourceMap.get(MessageConstants.ON_COMPLETE_RESOURCE);
            if (onCompleted == null) {
                String message = "Error in listener service definition. onError resource does not exists";
                LOG.error(message);
                throw new RuntimeException(message);
            }
            List<ParamDetail> paramDetails = onCompleted.getParamDetails();
            BValue[] signatureParams = new BValue[paramDetails.size()];
            signatureParams[0] = getConnectionParameter(onCompleted, responseObserver);
            CallableUnitCallback callback = new GrpcCallableUnitCallBack(responseObserver, Boolean.FALSE);
            Executor.submit(onCompleted, callback, null, null, signatureParams);
        }
    };
}