| /** |
| * |
| */ |
| package org.taverna.server.master.utils; |
| |
| import static java.lang.String.format; |
| import static java.lang.System.nanoTime; |
| import static org.apache.commons.logging.LogFactory.getLog; |
| |
| import java.io.IOException; |
| |
| import javax.servlet.Filter; |
| import javax.servlet.FilterChain; |
| import javax.servlet.FilterConfig; |
| import javax.servlet.ServletException; |
| import javax.servlet.ServletRequest; |
| import javax.servlet.ServletResponse; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| |
| import org.apache.commons.logging.Log; |
| |
| /** |
| * Logs the time it takes to service HTTP calls into Taverna Server. |
| * <p> |
| * This class is currently not used. |
| * |
| * @author Donal Fellows |
| */ |
| public class CallTimingFilter implements Filter { |
| private Log log; |
| private String name; |
| |
| @Override |
| public void init(FilterConfig filterConfig) throws ServletException { |
| log = getLog("Taverna.Server.Performance"); |
| name = filterConfig.getInitParameter("name"); |
| } |
| |
| @Override |
| public void doFilter(ServletRequest request, ServletResponse response, |
| FilterChain chain) throws IOException, ServletException { |
| if (request instanceof HttpServletRequest) |
| doFilter((HttpServletRequest) request, |
| (HttpServletResponse) response, chain); |
| else |
| chain.doFilter(request, response); |
| } |
| |
| public void doFilter(HttpServletRequest request, |
| HttpServletResponse response, FilterChain chain) |
| throws IOException, ServletException { |
| long start = nanoTime(); |
| chain.doFilter(request, response); |
| long elapsedTime = nanoTime() - start; |
| log.info(format("%s call to %s %s took %.3fms", name, |
| request.getMethod(), request.getRequestURI(), |
| elapsedTime / 1000000.0)); |
| } |
| |
| @Override |
| public void destroy() { |
| log = null; |
| } |
| } |