org.n52.tamis.rest.forward.processes.jobs.JobOutputsRequestForwarder.java Source code

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Here is the source code for org.n52.tamis.rest.forward.processes.jobs.JobOutputsRequestForwarder.java

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/**
 * Copyright (C) 2016-2016 52North Initiative for Geospatial Open Source
 * Software GmbH
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License version 2 as publishedby the Free
 * Software Foundation.
 *
 * If the program is linked with libraries which are licensed under one of the
 * following licenses, the combination of the program with the linked library is
 * not considered a "derivative work" of the program:
 *
 *     - Apache License, version 2.0
 *     - Apache Software License, version 1.0
 *     - GNU Lesser General Public License, version 3
 *     - Mozilla Public License, versions 1.0, 1.1 and 2.0
 *     - Common Development and Distribution License (CDDL), version 1.0
 *
 * Therefore the distribution of the program linked with libraries licensed under
 * the aforementioned licenses, is permitted by the copyright holders if the
 * distribution is compliant with both the GNU General Public License version 2
 * and the aforementioned licenses.
 *
 * 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 General Public License for more details.
 */
package org.n52.tamis.rest.forward.processes.jobs;

import javax.servlet.http.HttpServletRequest;

import org.n52.tamis.core.javarepresentations.processes.jobs.result.ResultDocument;
import org.n52.tamis.core.urlconstants.URL_Constants_TAMIS;
import org.n52.tamis.core.urlconstants.URL_Constants_WpsProxy;
import org.n52.tamis.rest.controller.ParameterValueStore;
import org.n52.tamis.rest.forward.AbstractRequestForwarder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.client.RestTemplate;

public class JobOutputsRequestForwarder extends AbstractRequestForwarder {

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

    /**
     * {@inheritDoc} <br/>
     * <br/>
     * Delegates an incoming outputs (result document) request to the WPS proxy
     * and creates an instance of {@link ResultDocument}
     * 
     * @param parameterValueStore
     *            must contain the URL variable
     *            {@link URL_Constants_TAMIS#SERVICE_ID_VARIABLE_NAME} to
     *            identify the WPS instance and
     *            {@link URL_Constants_TAMIS#PROCESS_ID_VARIABLE_NAME} to
     *            identify the process and
     *            {@link URL_Constants_TAMIS#JOB_ID_VARIABLE_NAME} to identify
     *            the job
     * @return an instance of {@link ResultDocument}
     */
    @Override
    public <T> ResultDocument forwardRequestToWpsProxy(HttpServletRequest request, T requestBody,
            ParameterValueStore parameterValueStore) {
        initializeRequestSpecificParameters(parameterValueStore);

        String outputs_url_wpsProxy = createTargetURL_WpsProxy(request);

        RestTemplate outputsTemplate = new RestTemplate();

        // fetch the result document from WPS proxy and
        // deserialize it into TAMIS ResultDocument
        ResultDocument resultDocument = outputsTemplate.getForObject(outputs_url_wpsProxy, ResultDocument.class);

        return resultDocument;
    }

    @Override
    protected String setUpTargetUrl_WithSameBaseUrl(String contextURL) {
        /*
         * The difference between contextURL of TAMIS interface and the
         * targetURL of the WPS proxy is a prefix + service number:
         * 
         * contexURL:
         * "<baseURL>/constantServicePrefix/{service_id}/processes/{process_id}/jobs/{job_id}/outputs"
         * 
         * targetURL: "<baseURL>/processes/{process_id}/jobs/{job_id}/outputs"
         */

        String targetURL = contextURL.split(URL_Constants_TAMIS.TAMIS_PREFIX)[0];
        targetURL = targetURL + URL_Constants_WpsProxy.SLASH_PROCESSES + "/" + this.getProcessId()
                + URL_Constants_WpsProxy.SLASH_JOBS + "/" + this.getJobId() + URL_Constants_WpsProxy.SLASH_OUTPUTS;

        return targetURL;
    }

    @Override
    protected String setUpTargetUrl_WithDifferentBaseUrl(String baseURL_WpsProxy) {
        // targetURL: "<baseURL>/processes/{process_id}/jobs/{job_id}/outputs"
        return baseURL_WpsProxy + URL_Constants_WpsProxy.PROCESSES + "/" + this.getProcessId()
                + URL_Constants_WpsProxy.SLASH_JOBS + "/" + this.getJobId() + URL_Constants_WpsProxy.SLASH_OUTPUTS;
    }

}