Open Kilda Java Documentation
ExecutionTimeInterceptor.java
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1 /* Copyright 2017 Telstra Open Source
2  *
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 package org.openkilda.northbound.utils;
17 
18 import static org.openkilda.messaging.Utils.TIMESTAMP;
19 
20 import org.slf4j.Logger;
21 import org.slf4j.LoggerFactory;
22 import org.springframework.web.servlet.HandlerInterceptor;
23 import org.springframework.web.servlet.ModelAndView;
24 
25 import javax.servlet.http.HttpServletRequest;
26 import javax.servlet.http.HttpServletResponse;
27 
31 public class ExecutionTimeInterceptor implements HandlerInterceptor {
35  private static final Logger logger = LoggerFactory.getLogger(ExecutionTimeInterceptor.class);
36 
40  @Override
41  public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object obj) {
42  request.setAttribute(TIMESTAMP, System.currentTimeMillis());
43  return true;
44  }
45 
49  @Override
50  public void postHandle(HttpServletRequest request, HttpServletResponse response, Object obj, ModelAndView mv) {
51  }
52 
56  @Override
57  public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object obj, Exception ex) {
58  long executed = System.currentTimeMillis() - (long) request.getAttribute(TIMESTAMP);
59  logger.debug("execution-time ms: {}", executed);
60  }
61 }
boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object obj)
void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object obj, Exception ex)
void postHandle(HttpServletRequest request, HttpServletResponse response, Object obj, ModelAndView mv)
static final String TIMESTAMP
Definition: Utils.java:35