org.openlmis.fulfillment.service.referencedata.BaseReferenceDataService.java Source code

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Here is the source code for org.openlmis.fulfillment.service.referencedata.BaseReferenceDataService.java

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/*
 * This program is part of the OpenLMIS logistics management information system platform software.
 * Copyright  2017 VillageReach
 *
 * This program is free software: you can redistribute it and/or modify it under the terms
 * of the GNU Affero General Public License as published by the Free Software Foundation, either
 * version 3 of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Affero General Public License for more details. You should have received a copy of
 * the GNU Affero General Public License along with this program. If not, see
 * http://www.gnu.org/licenses. For additional information contact info@OpenLMIS.org.
 */

package org.openlmis.fulfillment.service.referencedata;

import static org.openlmis.fulfillment.service.request.RequestHelper.createUri;

import java.util.UUID;
import org.openlmis.fulfillment.service.BaseCommunicationService;
import org.openlmis.fulfillment.service.request.RequestParameters;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.client.HttpStatusCodeException;

public abstract class BaseReferenceDataService<T> extends BaseCommunicationService<T> {
    private final Logger logger = LoggerFactory.getLogger(getClass());

    @Value("${referencedata.url}")
    private String referenceDataUrl;

    /**
     * Return one object from Reference data service.
     *
     * @param id UUID of requesting object.
     * @return Requesting reference data object.
     */
    public T findOne(UUID id) {
        String url = getServiceUrl() + getUrl() + id;

        try {
            ResponseEntity<T> responseEntity = restTemplate.exchange(buildUri(url), HttpMethod.GET, createEntity(),
                    getResultClass());
            return responseEntity.getBody();
        } catch (HttpStatusCodeException ex) {
            // rest template will handle 404 as an exception, instead of returning null
            if (ex.getStatusCode() == HttpStatus.NOT_FOUND) {
                logger.warn("{} with id {} does not exist. ", getResultClass().getSimpleName(), id);
                return null;
            } else {
                throw buildDataRetrievalException(ex);
            }
        }
    }

    <P> P get(Class<P> type, String resourceUrl, RequestParameters parameters) {
        String url = getServiceUrl() + getUrl() + resourceUrl;

        ResponseEntity<P> response = restTemplate.exchange(createUri(url, parameters), HttpMethod.GET,
                createEntity(), type);

        return response.getBody();
    }

    protected String getServiceUrl() {
        return referenceDataUrl;
    }

    protected abstract String getUrl();

    protected abstract Class<T> getResultClass();

    protected abstract Class<T[]> getArrayResultClass();
}