/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
package org.apache.nifi.web.filter;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
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 org.apache.nifi.cluster.coordination.http.replication.RequestReplicator;
import org.apache.nifi.logging.NiFiLog;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* A filter to time requests.
*
*/
public class TimerFilter implements Filter {
private static final Logger logger = new NiFiLog(LoggerFactory.getLogger(TimerFilter.class));
@Override
public void doFilter(final ServletRequest req, final ServletResponse resp, final FilterChain filterChain)
throws IOException, ServletException {
final HttpServletRequest request = (HttpServletRequest) req;
final long start = System.nanoTime();
try {
filterChain.doFilter(req, resp);
} finally {
final long stop = System.nanoTime();
final String requestId = ((HttpServletRequest) req).getHeader(RequestReplicator.REQUEST_TRANSACTION_ID_HEADER);
logger.debug("{} {} from {} request duration for Request ID {}: {} millis", request.getMethod(), request.getRequestURL().toString(),
req.getRemoteHost(), requestId, TimeUnit.MILLISECONDS.convert(stop - start, TimeUnit.NANOSECONDS));
}
}
@Override
public void init(final FilterConfig config) {
}
@Override
public void destroy() {
}
}