Package io.prometheus.client.hotspot

Class ClassLoadingExports

  • public class ClassLoadingExports
extends Collector
    Exports metrics about JVM classloading.

    Example usage: 

     
   new ClassLoadingExports().register();
    Example metrics being exported: 
       jvm_classes_currently_loaded{} 1000
   jvm_classes_loaded_total{} 2000
   jvm_classes_unloaded_total{} 500

    • Field Detail

      • JVM_CLASSES_CURRENTLY_LOADED

        private static final java.lang.String JVM_CLASSES_CURRENTLY_LOADED
        See Also:
        Constant Field Values

      • JVM_CLASSES_LOADED_TOTAL

        private static final java.lang.String JVM_CLASSES_LOADED_TOTAL
        See Also:
        Constant Field Values

      • JVM_CLASSES_UNLOADED_TOTAL

        private static final java.lang.String JVM_CLASSES_UNLOADED_TOTAL
        See Also:
        Constant Field Values

      • clBean

        private final java.lang.management.ClassLoadingMXBean clBean

    • Constructor Detail

      • ClassLoadingExports

        public ClassLoadingExports()

      • ClassLoadingExports

        public ClassLoadingExports​(java.lang.management.ClassLoadingMXBean clBean)

    • Method Detail

      • collect

        public java.util.List<Collector.MetricFamilySamples> collect​(Predicate<java.lang.String> nameFilter)
        Description copied from class: Collector
        Like Collector.collect(), but the result should only contain MetricFamilySamples where sampleNameFilter.test(name) is true for at least one Sample name.

        The default implementation first collects all MetricFamilySamples and then discards the ones where sampleNameFilter.test(name) returns false for all names in Collector.MetricFamilySamples.getNames(). To improve performance, collector implementations should override this method to prevent MetricFamilySamples from being collected if they will be discarded anyways. See ThreadExports for an example.

        Note that the resulting List may contain MetricFamilySamples where some Sample names return true for sampleNameFilter.test(name) but some Sample names return false. This is ok, because before we produce the output format we will call Collector.MetricFamilySamples.filter(Predicate) to strip all Samples where sampleNameFilter.test(name) returns false.

        Overrides:
        collect in class Collector
        Parameters:
        nameFilter - may be null, indicating that all metrics should be collected.