This package provides some simple metrics and associated operations that allow for the recording of application metrics and persisting them to various different local or cloud storage/metric systems. You code registers metrics and then doesn't have to not worry about how they are managed or persisted.
The following is a simple example program showing how SimpleMetrics works. For a full working example see the BasicExample class.
// create our metrics manager which controls everything MetricsManager metricsManager = new MetricsManager(); // create and register a persister, you will probably want to write your own for your own logging system LoggingMetricsPersister persister = new LoggingMetricsPersister(); metricsManager.setMetricValuesPersisters(new MetricValuesPersister[] { persister }); // create and register one (or many) metrics ControlledMetricAccum hitCounter = new ControlledMetricAccum("example", null, "hits", "number of hits to the cache", null); metricsManager.registerMetric(hitCounter); // optionally start a persister thread to persist the metrics every minute (60000 millis) MetricsPersisterJob persisterThread = new MetricsPersisterJob(manager, 60000, 60000, true); // now the metric can be incremented whenever a "hit" occurs hitCounter.increment(); // or maybe we need to account for a bunch of hits hitCounter.add(23); // ... // the persister will log the value of hitCounter every 60 seconds automatically
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