com.lyncode.oai.proxy.ProxyDataProvider.java Source code

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Here is the source code for com.lyncode.oai.proxy.ProxyDataProvider.java

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/**
 * Copyright 2012 Lyncode
 *
 * Licensed 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.
 * 
 * @author Development @ Lyncode <development@lyncode.com>
 * @version 
 */
package com.lyncode.oai.proxy;

import java.io.File;
import java.io.IOException;
import java.io.OutputStream;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.configuration.ConfigurationException;
import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;
import org.apache.log4j.PropertyConfigurator;

import com.lyncode.oai.proxy.core.ConfigurationManager;
import com.lyncode.oai.proxy.data.ProxyIdentify;
import com.lyncode.oai.proxy.data.ProxyItemRepository;
import com.lyncode.oai.proxy.data.ProxySetRepository;
import com.lyncode.xoai.dataprovider.OAIDataProvider;
import com.lyncode.xoai.dataprovider.OAIRequestParameters;
import com.lyncode.xoai.dataprovider.core.XOAIManager;
import com.lyncode.xoai.dataprovider.exceptions.InvalidContextException;
import com.lyncode.xoai.dataprovider.exceptions.OAIException;

/**
 * @author Development @ Lyncode <development@lyncode.com>
 * @version 
 */
public class ProxyDataProvider extends HttpServlet {
    private static final long serialVersionUID = -5867723882301285668L;
    private static Logger log = LogManager.getLogger(ProxyDataProvider.class);

    @Override
    public void init() throws ServletException {
        log.info("OAI Proxy Initialized");
    }

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        ProxyIdentify identify = new ProxyIdentify(req);
        ProxySetRepository listsets = new ProxySetRepository();
        ProxyItemRepository itemRepository = new ProxyItemRepository();

        try {
            XOAIManager.initialize("config" + File.separator + "xoai");
            log.debug("Creating XOAI Data Provider Instance");

            log.debug("Requested context: " + req.getPathInfo().replace("/", ""));

            OAIDataProvider dataprovider = new OAIDataProvider(req.getPathInfo().replace("/", ""), identify,
                    listsets, itemRepository);
            log.debug("Reading parameters from request");

            OutputStream out = resp.getOutputStream();
            OAIRequestParameters parameters = new OAIRequestParameters();
            parameters.setFrom(req.getParameter("from"));
            parameters.setUntil(req.getParameter("until"));
            parameters.setSet(req.getParameter("set"));
            parameters.setVerb(req.getParameter("verb"));
            parameters.setMetadataPrefix(req.getParameter("metadataPrefix"));
            parameters.setIdentifier(req.getParameter("identifier"));
            parameters.setResumptionToken(req.getParameter("resumptionToken"));

            resp.setContentType("application/xml");

            dataprovider.handle(parameters, out);

            out.flush();
            out.close();
        } catch (InvalidContextException e) {
            resp.sendError(HttpServletResponse.SC_NOT_FOUND,
                    "Requested OAI context \"" + req.getPathInfo().replace("/", "") + "\" does not exist");
        } catch (OAIException e) {
            log.error(e.getMessage(), e);
            resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
                    "An error occurred, please, contact the develop team development@lyncode.com");
        } catch (com.lyncode.xoai.dataprovider.exceptions.ConfigurationException e) {
            log.error(e.getMessage(), e);
            resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
                    "An error occurred, please, contact the develop team development@lyncode.com");
        }
    }

}