private List<GraphiteMetric> getUptimeMetrics() {
List<GraphiteMetric> allGraphiteMetrics = new ArrayList<>();
try {
int currentTimestampInSeconds = (int) (System.currentTimeMillis() / 1000);
String rawUptime =
FileIo.readFileToString(super.getLinuxProcFileSystemLocation() + "/uptime");
if ((rawUptime == null) || rawUptime.isEmpty()) return allGraphiteMetrics;
int indexOfFirstSpace = rawUptime.indexOf(' ');
if (indexOfFirstSpace == -1) return allGraphiteMetrics;
String uptimeSinceOsBoot = rawUptime.substring(0, indexOfFirstSpace).trim();
if ((uptimeSinceOsBoot == null) || uptimeSinceOsBoot.isEmpty()) return allGraphiteMetrics;
BigDecimal uptimeSinceOsBoot_BigDecimal = new BigDecimal(uptimeSinceOsBoot);
if (uptimeSinceOsBoot_BigDecimal.compareTo(BigDecimal.ZERO) != -1) {
allGraphiteMetrics.add(
new GraphiteMetric(
"OS_Uptime-Seconds", uptimeSinceOsBoot_BigDecimal, currentTimestampInSeconds));
}
} catch (Exception e) {
logger.error(e.toString() + System.lineSeparator() + StackTrace.getStringFromStackTrace(e));
}
return allGraphiteMetrics;
}
protected List<GenericMetricFormat> getMetricsFromFile(
boolean alwaysCheckOutputFiles, String metricPrefix) {
if (fileToMonitor_ == null) {
return new ArrayList<>();
}
List<GenericMetricFormat> metrics = new ArrayList<>();
if (FileIo.doesFileExist(fileToMonitor_)) {
Long currentFileLastModifiedTimestamp = null;
try {
currentFileLastModifiedTimestamp = fileToMonitor_.lastModified();
} catch (Exception e) {
logger.warn(e.toString() + System.lineSeparator() + StackTrace.getStringFromStackTrace(e));
}
if ((currentFileLastModifiedTimestamp != null)
&& (currentFileLastModifiedTimestamp >= applicationStartTimeInMs_)) {
boolean doesFileHaveNewerLastModifiedTimestamp =
(previousFileLastModifiedTimestamp_ != null)
&& (previousFileLastModifiedTimestamp_ < currentFileLastModifiedTimestamp);
if ((previousFileLastModifiedTimestamp_ == null)
|| ((previousFileLastModifiedTimestamp_ != null) && alwaysCheckOutputFiles)
|| doesFileHaveNewerLastModifiedTimestamp) {
String fileContents =
FileIo.readFileToString(
fileToMonitor_, NUM_FILE_READ_RETRIES, DELAY_BETWEEN_READ_RETRIES_IN_MS);
List<GenericMetricFormat> metricsFromFile =
getMetricsFromString(fileContents, metricPrefix, applicationStartTimeInMs_);
metrics.addAll(metricsFromFile);
previousFileLastModifiedTimestamp_ = currentFileLastModifiedTimestamp;
}
}
}
return metrics;
}