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;
}
protected static List<GenericMetricFormat> getMetricsFromString(
String unparsedMetrics, String metricPrefix, long oldestAllowedMetricTimestamp) {
if ((unparsedMetrics == null) || unparsedMetrics.isEmpty()) {
return new ArrayList<>();
}
List<GenericMetricFormat> metrics = new ArrayList();
long currentTimestamp = System.currentTimeMillis();
StringReader stringReader = null;
BufferedReader bufferedReader = null;
try {
stringReader = new StringReader(unparsedMetrics);
bufferedReader = new BufferedReader(stringReader);
String unparsedMetric = bufferedReader.readLine();
while (unparsedMetric != null) {
String unparsedMetricTrimmed = unparsedMetric.trim();
boolean isGraphiteMetric = isGraphiteMetric(unparsedMetricTrimmed);
GraphiteMetric graphiteMetric = null;
OpenTsdbMetric openTsdbMetric = null;
if (isGraphiteMetric)
graphiteMetric =
GraphiteMetric.parseGraphiteMetric(unparsedMetric, metricPrefix, currentTimestamp);
else {
boolean isOpenTsdbMetric = isOpenTsdbMetric(unparsedMetricTrimmed);
if (isOpenTsdbMetric)
openTsdbMetric =
OpenTsdbMetric.parseOpenTsdbMetric(unparsedMetric, metricPrefix, currentTimestamp);
else
logger.error(
"Invalid metric -- unrecognized format. Metric=\"" + unparsedMetric + "\"");
}
if ((graphiteMetric != null)
&& (graphiteMetric.getMetricTimestampInMilliseconds() > oldestAllowedMetricTimestamp))
metrics.add(graphiteMetric);
if ((openTsdbMetric != null)
&& (openTsdbMetric.getMetricTimestampInMilliseconds() > oldestAllowedMetricTimestamp))
metrics.add(openTsdbMetric);
unparsedMetric = bufferedReader.readLine();
}
} catch (Exception e) {
logger.error(e.toString() + System.lineSeparator() + StackTrace.getStringFromStackTrace(e));
} finally {
try {
if (bufferedReader != null) {
bufferedReader.close();
}
} catch (Exception e) {
logger.error(e.toString() + System.lineSeparator() + StackTrace.getStringFromStackTrace(e));
}
try {
if (stringReader != null) {
stringReader.close();
}
} catch (Exception e) {
logger.error(e.toString() + System.lineSeparator() + StackTrace.getStringFromStackTrace(e));
}
}
return metrics;
}