@Test
public void testBasic() throws Exception {
MonitorRegistry registry = new BasicMonitorRegistry();
registry.registerObject(new BasicCounter("foo"));
MetricPoller poller = new MonitorRegistryMetricPoller(registry);
Metric metric = poller.poll(MATCH_ALL).get(0);
TagList tags =
BasicTagList.copyOf(
new BasicTag("MonitorId", "foo"),
new BasicTag("ClassName", "com.netflix.servo.util.BasicCounter"),
DataSourceType.COUNTER);
assertEquals(metric.getConfig(), new MetricConfig("Count", tags));
}
private void refreshMonitorCache(MetricFilter filter) {
final long age = System.currentTimeMillis() - cacheLastUpdateTime.get();
if (age > cacheTTL) {
List<Monitor<?>> monitors = Lists.newArrayList();
for (Monitor<?> monitor : registry.getRegisteredMonitors()) {
try {
getMonitors(monitors, filter, monitor);
} catch (Exception e) {
LOGGER.warn("failed to get monitors for composite " + monitor.getConfig(), e);
}
}
cacheLastUpdateTime.set(System.currentTimeMillis());
cachedMonitors.set(monitors);
LOGGER.debug(
"cache refreshed, {} monitors matched filter, previous age {} seconds",
monitors.size(),
age / 1000);
} else {
LOGGER.debug(
"cache age of {} seconds is within ttl of {} seconds", age / 1000, cacheTTL / 1000);
}
}
