common-app-api/src/main/java/org/openecomp/sdc/common/ecomplog/Stopwatch.java

   1 package org.openecomp.sdc.common.ecomplog;
   2
   3 import static org.openecomp.sdc.common.ecomplog.api.IEcompLogConfiguration.MDC_BEGIN_TIMESTAMP;
   4 import static org.openecomp.sdc.common.ecomplog.api.IEcompLogConfiguration.MDC_ELAPSED_TIME;
   5 import static org.openecomp.sdc.common.ecomplog.api.IEcompLogConfiguration.MDC_END_TIMESTAMP;
   6
   7 import java.time.Clock;
   8 import java.time.Duration;
   9 import java.time.LocalDateTime;
  10
  11 import org.openecomp.sdc.common.ecomplog.api.IStopWatch;
  12 import org.slf4j.Logger;
  13 import org.slf4j.LoggerFactory;
  14 import org.slf4j.MDC;
  15
  16 /**
  17  * Created by dd4296 on 12/13/2017.
  18  * this is local implementation of the stopwatch class from EELF standard with the same interface
  19  * can be replaced if needed with EELF lib
  20  */
  21 public class Stopwatch implements IStopWatch {
  22
  23     private static Logger log = LoggerFactory.getLogger(Stopwatch.class.getName());
  24
  25     public Stopwatch() {
  26     }
  27
  28     public void start() {
  29         if (MDC.get(MDC_BEGIN_TIMESTAMP) == null || MDC.get(MDC_BEGIN_TIMESTAMP).trim().length() == 0)
  30             MDC.put(MDC_BEGIN_TIMESTAMP, generatedTimeNow());
  31     }
  32
  33     public void stop() {
  34         if (MDC.get(MDC_BEGIN_TIMESTAMP) == null) {
  35             log.error("call to stop without calling start first, this is not compliant with EELF format");
  36         }
  37         MDC.put(MDC_END_TIMESTAMP, generatedTimeNow());
  38         setElapsedTime();
  39     }
  40
  41     private void setElapsedTime() {
  42
  43         try {
  44
  45             final LocalDateTime startTime = LocalDateTime.parse(MDC.get(MDC_BEGIN_TIMESTAMP));
  46             final LocalDateTime endTime = LocalDateTime.parse(MDC.get(MDC_END_TIMESTAMP));
  47
  48             final Duration timeDifference = Duration.between(startTime, endTime);
  49
  50             MDC.put(MDC_ELAPSED_TIME, String.valueOf(timeDifference.toMillis()));
  51
  52         } catch(Exception ex) {
  53             log.error("failed to calculate elapsed time",ex);
  54         }
  55     }
  56
  57     private String generatedTimeNow() {
  58         return String.valueOf(LocalDateTime.now(Clock.systemUTC()));
  59     }
  60
  61 }