public static Stats analyze(
InputStream eventStream, long startTimestamp, EventMetadata eventMetadata)
throws IOException {
Stats stats = new Stats();
stats.setEventMetadata(eventMetadata);
stats.setStartTimestamp(startTimestamp);
stats.computeStats(eventStream);
return stats;
}
public static void main(String[] args) {
Options options = new Options();
options.addOption(
Option.builder(OPTION_PERCENTILE).hasArg().type(Float.class).required().build());
options.addOption(Option.builder(OPTION_IN_FILE).hasArg().build());
options.addOption(Option.builder(OPTION_START_OFFSET).required(false).hasArg().build());
options.addOption(Option.builder(OPTION_USE_CASE).required(false).hasArg().build());
options.addOption(Option.builder(OPTION_DUMP_LOG).hasArg().build());
try {
CommandLineParser clParser = new DefaultParser();
CommandLine cmd = clParser.parse(options, args);
float percentile = Float.parseFloat(cmd.getOptionValue(OPTION_PERCENTILE));
if (percentile <= 0 || percentile > 1) {
throw new ParseException("Percentile value must be within (0,1]");
}
long startOffset =
cmd.hasOption(OPTION_START_OFFSET)
? Long.valueOf(cmd.getOptionValue(OPTION_START_OFFSET))
: 0;
InputStream in = null;
if (cmd.hasOption(OPTION_IN_FILE)) {
String path = cmd.getOptionValue(OPTION_IN_FILE);
in = new FileInputStream(path);
} else {
in = System.in;
}
EventMetadata eventMetadata;
if (cmd.hasOption(OPTION_USE_CASE) && cmd.getOptionValue(OPTION_USE_CASE).equals("traffic")) {
eventMetadata = new TrafficEventMetadata();
} else {
eventMetadata = new CCFEventMetadata();
}
Stats stats = Stats.analyze(in, startOffset, eventMetadata);
System.out.println(
String.format(
"%.1f%% End-to-end latency: %d ms", percentile * 100, stats.getLatency(percentile)));
System.out.println(
String.format(
"%.1f%% Processing latency: %d ms",
percentile * 100, stats.getProcessingLatency(percentile)));
System.out.println(
String.format("%.1f%% End-to-end latencies per event type:", percentile * 100));
for (String type : stats.e2eLatenciesPerType.keySet()) {
System.out.println(
String.format("%s: %d ms", type, stats.getPerTypeLatency(type, percentile)));
}
System.out.println(
String.format(
"%.1f%% Input phase latency: %d ms",
percentile * 100, stats.getInLatency(percentile)));
System.out.println(
String.format(
"%.1f%% Output phase latency: %d ms",
percentile * 100, stats.getOutLatency(percentile)));
System.out.println(
String.format(
"Num of input events: %d, average rate: %f events/sec",
stats.numOfInEvents, stats.getAvgInRate()));
if (cmd.hasOption(OPTION_DUMP_LOG)) {
String path = cmd.getOptionValue(OPTION_DUMP_LOG);
stats.dumpLog(path, true);
}
} catch (ParseException pe) {
System.err.println(pe.getMessage());
System.err.println(USAGE);
System.exit(1);
} catch (IOException ioe) {
System.out.println(ioe.getMessage());
System.exit(1);
}
}