private Stats getLastCallTimeCollection(
String requestName, Map<String, Map<String, Number>> fallbackValues, long fallbackStartTime)
throws IOException {
File dataFile = new File(context.getResourceDataDirectory(), requestName);
if (!dataFile.exists()) {
return Stats.fromMap(
fallbackValues, requestName, System.currentTimeMillis(), fallbackStartTime);
} else {
ObjectInputStream in = null;
try {
in = new ObjectInputStream(new FileInputStream(dataFile));
Stats stats = (Stats) in.readObject();
if (stats.serverStartTime == 0) {
// we might get serverStartTime == 0 if the datafile comes from the old version of the
// plugin
// in that case just fallback to the old behavior that assumed no server restarts.
// After that we save the new version of the stats with the start time remembered and we
// will
// switch to the new correct behavior from the next collection.
stats.serverStartTime = fallbackStartTime;
}
return stats;
} catch (IOException e) {
throw new IOException(
"Couldn't read the stored calltime data from file " + dataFile + ".", e);
} catch (ClassNotFoundException e) {
throw new IllegalStateException("Couldn't find plugin API classes. This is serious!", e);
} finally {
StreamUtil.safeClose(in);
}
}
}
static Stats fromMap(
Map<String, Map<String, Number>> map,
String collectedMetric,
long collectionTime,
long serverStartTime) {
Stats ret = new Stats();
ret.serverStartTime = serverStartTime;
ret.collectionTime = collectionTime;
ret.data = new HashMap<String, StatsRecord>(map.size());
for (Map.Entry<String, Map<String, Number>> entry : map.entrySet()) {
StatsRecord rec = new StatsRecord();
String methodName = entry.getKey();
rec.invocations = entry.getValue().get("invocations").longValue();
rec.total = entry.getValue().get(collectedMetric).longValue();
ret.data.put(methodName, rec);
}
return ret;
}