api/service/src/main/java/org/apache/airavata/mft/api/handler/MFTApiHandler.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.airavata.mft.api.handler;

import io.grpc.stub.StreamObserver;
import org.apache.airavata.mft.admin.MFTAdmin;
import org.apache.airavata.mft.admin.models.TransferRequest;
import org.apache.airavata.mft.api.service.*;
import org.apache.airavata.mft.api.db.entities.TransferStatusEntity;
import org.apache.airavata.mft.api.db.repositories.TransferStatusRepository;
import org.dozer.DozerBeanMapper;
import org.lognet.springboot.grpc.GRpcService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;

import java.util.List;
import java.util.Optional;

@GRpcService
public class MFTApiHandler extends MFTApiServiceGrpc.MFTApiServiceImplBase {

    private static final Logger logger = LoggerFactory.getLogger(MFTApiHandler.class);

    @Autowired
    private TransferStatusRepository statusRepository;

    @Autowired
    private MFTAdmin mftAdmin;

    @Autowired
    private DozerBeanMapper dozerBeanMapper;

    @Override
    public void submitTransfer(TransferApiRequest request, StreamObserver<TransferApiResponse> responseObserver) {
        try {
            TransferRequest transferRequest = dozerBeanMapper.map(request, TransferRequest.class);
            Optional.ofNullable(request.getTargetAgentsMap()).ifPresent(transferRequest::setTargetAgents); // Custom mapping

            String transferId = mftAdmin.submitTransfer(transferRequest);
            logger.info("Submitted the transfer request {}", transferId);
            responseObserver.onNext(TransferApiResponse.newBuilder().setTransferId(transferId).build());
            responseObserver.onCompleted();
        } catch (Exception e) {
            logger.error("Error in submitting transfer request", e);
            responseObserver.onError(new Exception("Failed to submit transfer", e));
        }
    }

    @Override
    public void getTransferStates(TransferStateApiRequest request, StreamObserver<TransferStateApiResponse> responseObserver) {
        try {
            List<TransferStatusEntity> states = statusRepository.getByTransferId(request.getTransferId());
            states.forEach(st -> {
                TransferStateApiResponse s = dozerBeanMapper.map(st, TransferStateApiResponse.newBuilder().getClass()).build();
                responseObserver.onNext(s);
            });
            responseObserver.onCompleted();
        } catch (Exception e) {
            logger.error("Error in fetching transfer states", e);
            responseObserver.onError(new Exception("Failed to retrieve transfer states", e));
        }
    }

    @Override
    public void getTransferState(TransferStateApiRequest request, StreamObserver<TransferStateApiResponse> responseObserver) {
        try {
            List<TransferStatusEntity> states = statusRepository.getByTransferId(request.getTransferId());
            states.stream().findFirst().ifPresent(st -> {
                TransferStateApiResponse s = dozerBeanMapper.map(st, TransferStateApiResponse.newBuilder().getClass()).build();
                responseObserver.onNext(s);
            });
            responseObserver.onCompleted();
        } catch (Exception e) {
            logger.error("Error in fetching transfer state", e);
            responseObserver.onError(new Exception("Failed to retrieve transfer state", e));
        }
    }
}