private Comparator<PolicyStats> makeComparator() {
switch (settings.report().sortBy().toLowerCase()) {
case "policy":
return Comparator.comparing(PolicyStats::name);
case "hit rate":
return Comparator.comparingDouble(PolicyStats::hitRate);
case "hits":
return Comparator.comparingLong(PolicyStats::hitCount);
case "misses":
return Comparator.comparingLong(PolicyStats::missCount);
case "evictions":
return Comparator.comparingLong(PolicyStats::evictionCount);
case "steps":
return Comparator.comparingLong(PolicyStats::operationCount);
case "time":
return Comparator.comparingLong(stats -> stats.stopwatch().elapsed(TimeUnit.NANOSECONDS));
default:
throw new IllegalArgumentException("Unknown sort order: " + settings.report().sortBy());
}
}
/** Writes the report to the output destination. */
@Override
public void print() throws IOException {
results.sort(comparator());
String report = assemble(results);
String output = settings.report().output();
if (output.equalsIgnoreCase("console")) {
System.out.println(report);
} else {
File file = Paths.get(output).toFile();
Files.write(report, file, Charsets.UTF_8);
}
}
public CountMin64TinyLfu(Config config) {
BasicSettings settings = new BasicSettings(config);
sampleSize = 10 * settings.maximumSize();
if (settings.tinyLfu().conservative()) {
sketch =
new ConservativeAddSketch(
settings.tinyLfu().countMin64().eps(),
settings.tinyLfu().countMin64().confidence(),
settings.randomSeed());
} else {
sketch =
new CountMinSketch(
settings.tinyLfu().countMin64().eps(),
settings.tinyLfu().countMin64().confidence(),
settings.randomSeed());
}
}
/** Returns a comparator that sorts by the specified column. */
private Comparator<PolicyStats> comparator() {
Comparator<PolicyStats> comparator = makeComparator();
return settings.report().ascending() ? comparator : comparator.reversed();
}
