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package org.onap.sdc.common.onaplog;
import org.onap.sdc.common.onaplog.interfaces.IOnapLogConfiguration;
import org.onap.sdc.common.onaplog.interfaces.IStopWatch;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.MDC;
import java.time.Clock;
import java.time.Duration;
import java.time.LocalDateTime;
/**
* Created by dd4296 on 12/13/2017.
* this is local implementation of the stopwatch class from EELF standard with the same interface
* can be replaced if needed with EELF lib
*/
public class Stopwatch implements IStopWatch {
private static final Logger log = LoggerFactory.getLogger(Stopwatch.class.getName());
Stopwatch() {
}
public void start() {
if (MDC.get(IOnapLogConfiguration.MDC_BEGIN_TIMESTAMP) == null || MDC.get(IOnapLogConfiguration.MDC_BEGIN_TIMESTAMP).trim().length() == 0) {
MDC.put(IOnapLogConfiguration.MDC_BEGIN_TIMESTAMP, generatedTimeNow());
}
}
public void stop() {
if (MDC.get(IOnapLogConfiguration.MDC_BEGIN_TIMESTAMP) == null) {
log.error("call to stop without calling start first, this is not compliant with EELF format");
}
MDC.put(IOnapLogConfiguration.MDC_END_TIMESTAMP, generatedTimeNow());
setElapsedTime();
}
private void setElapsedTime() {
try {
final LocalDateTime startTime = LocalDateTime.parse(MDC.get(IOnapLogConfiguration.MDC_BEGIN_TIMESTAMP));
final LocalDateTime endTime = LocalDateTime.parse(MDC.get(IOnapLogConfiguration.MDC_END_TIMESTAMP));
final Duration timeDifference = Duration.between(startTime, endTime);
MDC.put(IOnapLogConfiguration.MDC_ELAPSED_TIME, String.valueOf(timeDifference.toMillis()));
} catch(Exception ex) {
log.error("failed to calculate elapsed time",ex);
}
}
private String generatedTimeNow() {
return String.valueOf(LocalDateTime.now(Clock.systemUTC()));
}
}
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