Examples with MetricsSystem org.apache.calcite.avatica.metrics.MetricsSystem used on opensource projects

Example 1 with MetricsSystem

use of org.apache.calcite.avatica.metrics.MetricsSystem in project calcite-avatica by apache.

the class NoopMetricsSystemTest method testNoNulls.

@Test
public void testNoNulls() {
    // The NOOP implementation should act as a real implementation, no "nulls" allowed.
    MetricsSystem metrics = NoopMetricsSystem.getInstance();
    Counter counter = metrics.getCounter("counter");
    counter.decrement();
    counter.increment();
    counter.decrement(1L);
    counter.increment(1L);
    Histogram histogram = metrics.getHistogram("histogram");
    histogram.update(1);
    histogram.update(1L);
    Timer timer = metrics.getTimer("timer");
    Context context = timer.start();
    context.close();
    Context contextTwo = timer.start();
    assertTrue("Timer's context should be a singleton", context == contextTwo);
    Meter meter = metrics.getMeter("meter");
    meter.mark();
    meter.mark(5L);
    metrics.register("gauge", new Gauge<Long>() {

        @Override
        public Long getValue() {
            return 42L;
        }
    });
}