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import java.sql.ResultSet; |
import java.sql.ResultSet; |
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import java.sql.Statement; |
import java.sql.Statement; |
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import java.util.List; |
import java.util.List; |
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import java.util.logging.Level; |
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import java.util.logging.Logger; |
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import javax.servlet.ServletException; |
import javax.servlet.ServletException; |
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import javax.servlet.http.HttpServlet; |
import javax.servlet.http.HttpServlet; |
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import org.w3c.dom.Document; |
import org.w3c.dom.Document; |
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import org.w3c.dom.Element; |
import org.w3c.dom.Element; |
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import dk.thoerup.circuitbreaker.CircuitBreakerException; |
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import dk.thoerup.traininfoservice.DBConnection; |
import dk.thoerup.traininfoservice.DBConnection; |
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/** |
/** |
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*/ |
*/ |
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public class DepartureServlet extends HttpServlet { |
public class DepartureServlet extends HttpServlet { |
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private static final long serialVersionUID = 1L; |
private static final long serialVersionUID = 1L; |
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Logger logger = Logger.getLogger( DepartureServlet.class.getName() ); |
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DepartureFetcher fetcher = new DepartureFetcher(); |
DepartureFetcher fetcher; |
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TransformerFactory transformerFactory = TransformerFactory.newInstance(); |
TransformerFactory transformerFactory = TransformerFactory.newInstance(); |
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DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance(); |
DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance(); |
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@Override |
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public void init() throws ServletException { |
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super.init(); |
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boolean useTempSite = Boolean.parseBoolean( getServletContext().getInitParameter("usetempsite") ); |
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int cacheTimeout = Integer.parseInt( getServletContext().getInitParameter("cache_timeout") ); |
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logger.info( "DepartureServlet, use temp site=" + useTempSite + ", cache=" + cacheTimeout); |
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fetcher = new DepartureFetcher(useTempSite, cacheTimeout); |
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} |
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@Override |
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protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { |
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { |
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if (req.getParameter("station") == null) { |
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resp.sendError(400, "not enough parameters"); |
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return; |
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} |
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int station = Integer.parseInt( req.getParameter("station") ); |
int station = Integer.parseInt( req.getParameter("station") ); |
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String format = req.getParameter("format"); |
String format = req.getParameter("format"); |
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String stationName = getStationName(station); |
String stationName = getStationName(station); |
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try { |
try { |
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beans = fetcher.lookupDepartures(station); |
beans = fetcher.cachedLookupDepartures(station); |
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} catch (Exception e) { |
} catch (java.io.IOException ioe) { |
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throw new ServletException(e); |
logger.warning("Read failed, station="+station + ". " + ioe.getMessage() ); |
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resp.sendError(500); |
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return; |
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} catch (CircuitBreakerException cbe) { |
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logger.warning("Circuitbreaker - failing fast"); |
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resp.sendError(500); |
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return; |
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} catch (Exception e) { |
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logger.log(Level.WARNING, "Unknown exception, station=" +station, e); |
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resp.sendError(500); |
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return; |
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} |
} |
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resp.setDateHeader("Expires", 0); |
resp.setDateHeader("Expires", 0); |
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resp.setContentType("text/xml"); |
resp.setContentType("text/xml"); |
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resp.getWriter().print( formatXml(beans, stationName) ); |
resp.getWriter().print( formatXml(beans, stationName) ); |
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} else if (format.equalsIgnoreCase("html")) { |
} else if (format.equalsIgnoreCase("html")) { |
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String advStr = req.getParameter("advanced"); |
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boolean advanced = advStr != null ? Boolean.parseBoolean(advStr) : false; |
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req.setAttribute("advanced", advanced); |
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req.setAttribute("stationname", stationName ); |
req.setAttribute("stationname", stationName ); |
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req.setAttribute("departurebeans", beans); |
req.setAttribute("departurebeans", beans); |
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req.setAttribute("stationID", station ); |
req.setAttribute("stationID", station ); |