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import java.io.IOException; |
import java.io.IOException; |
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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; |
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.HttpServletRequest; |
import javax.servlet.http.HttpServletRequest; |
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import javax.servlet.http.HttpServletResponse; |
import javax.servlet.http.HttpServletResponse; |
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import dk.thoerup.circuitbreaker.CircuitBreakerException; |
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/** |
/** |
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* Servlet implementation class TimetableServlet |
* Servlet implementation class TimetableServlet |
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*/ |
*/ |
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Logger logger = Logger.getLogger( TimetableServlet.class.getName() ); |
Logger logger = Logger.getLogger( TimetableServlet.class.getName() ); |
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TimetableFetcher fetcher = new TimetableFetcher(); |
TimetableFetcher fetcher; |
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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( "TimetableServlet, use temp site=" + useTempSite + ", cache=" + cacheTimeout); |
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fetcher = new TimetableFetcher(useTempSite,cacheTimeout); |
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} |
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@Override |
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protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { |
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { |
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if (request.getParameter("train") == null) { |
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response.sendError(400, "not enough parameters"); |
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return; |
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} |
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String train = request.getParameter("train").trim(); |
String train = request.getParameter("train").trim(); |
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String sections[] = train.split(" "); |
String sections[] = train.split(" "); |
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response.sendError(400, "Invalid parameter"); |
response.sendError(400, "Invalid parameter"); |
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return; |
return; |
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} |
} |
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String type = lookupType(sections[0]); |
String type = lookupType(sections[0]); |
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String trainID = sections[1]; |
String trainID = sections[1]; |
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try |
try |
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{ |
{ |
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List<TimetableBean> timetable = fetcher.lookupTimetable(trainID, type); |
List<TimetableBean> timetable = fetcher.cachedLookupTimetable(trainID, type); |
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String responseXML = formatTimetable(timetable); |
String responseXML = formatTimetable(timetable); |
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response.setContentType("text/xml"); |
response.setContentType("text/xml"); |
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response.getWriter().print(responseXML); |
response.getWriter().print(responseXML); |
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} catch (Exception e) { |
} catch (java.io.IOException ioe) { |
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logger.warning("failure looking up timetable: train=" +train); |
logger.warning("(timetable) Read failed, train="+train + ". " + ioe.getMessage()); |
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throw new ServletException(e); |
response.sendError(500, "Backend timed out"); |
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} catch (CircuitBreakerException cbe) { |
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logger.warning("Circuitbreaker - failing fast"); |
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response.sendError(500); |
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}catch (Exception e) { |
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logger.log(Level.WARNING, "failure looking up timetable: train=" +train, e); |
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response.sendError(500); |
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} |
} |
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} |
} |