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MidPointProfilingServletFilter.java
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MidPointProfilingServletFilter.java
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/*
* Copyright (c) 2010-2015 Evolveum and contributors
*
* This work is dual-licensed under the Apache License 2.0
* and European Union Public License. See LICENSE file for details.
*/
package com.evolveum.midpoint.web.util;
import java.io.IOException;
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import org.apache.catalina.connector.ClientAbortException;
import com.evolveum.midpoint.util.aspect.ProfilingDataLog;
import com.evolveum.midpoint.util.aspect.ProfilingDataManager;
import com.evolveum.midpoint.util.logging.Trace;
import com.evolveum.midpoint.util.logging.TraceManager;
/**
* In this filter, all incoming requests are captured and we measure server response times
* using {@link System#nanoTime()}.
* ight now we are logging this request/response information:
* <ul>
* <li>Requested URL</li>
* <li>Request method (GET/POST)</li>
* <li>Request session id</li>
* </ul>
* <p>
* Requests for .css or various image files are filtered and not recorded.
* <p>
* @author lazyman
* @author shood
*/
// TODO - After upgrading to javax.servlet version API 3.0, add response status code logging
// 2020: we are on API>3 now, but what was the original idea? Was it meant for exception logging?
// Also, elapsedTime should be calculated also for exception scenario and perhaps put into different statistics?
public class MidPointProfilingServletFilter implements Filter {
private static final Trace LOGGER = TraceManager.getTrace(MidPointProfilingServletFilter.class);
protected FilterConfig config;
@Override
public void destroy() {
}
@Override
public void init(FilterConfig config) {
this.config = config;
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
if (LOGGER.isTraceEnabled()) {
long startTime = System.nanoTime();
try {
chain.doFilter(request, response);
} catch (IOException | ServletException | RuntimeException | Error e) {
logException(e);
throw e;
}
long elapsedTime = System.nanoTime() - startTime;
if (request instanceof HttpServletRequest) {
String uri = ((HttpServletRequest) request).getRequestURI();
if (uri.startsWith("/midpoint/admin")) {
prepareRequestProfilingEvent(request, elapsedTime, uri);
}
}
} else {
try {
chain.doFilter(request, response);
} catch (IOException | ServletException | RuntimeException | Error e) {
logException(e);
throw e;
}
}
}
private void prepareRequestProfilingEvent(ServletRequest request, long elapsed, String uri) {
String info = ((HttpServletRequest) request).getMethod();
String sessionId = ((HttpServletRequest) request).getRequestedSessionId();
ProfilingDataLog event = new ProfilingDataLog(info, uri, sessionId, elapsed, System.currentTimeMillis());
ProfilingDataManager.getInstance().prepareRequestProfilingEvent(event);
}
private void logException(Throwable t) {
if (t instanceof ClientAbortException) {
if (LOGGER.isDebugEnabled()) {
// client abort exceptions are quite OK as they are not an application/server problem
LOGGER.debug("Encountered exception: {}: {}", t.getClass().getName(), t.getMessage(), t);
}
return;
}
LOGGER.error("Encountered exception: {}: {}", t.getClass().getName(), t.getMessage(), t);
}
}