Package org.apache.solr.metrics

The SolrCoreMetricManager is responsible for collecting metrics from SolrMetricProducer's and exposing metrics to SolrMetricReporter's.

Interface Summary

Interface	Description
MetricSuppliers.NoOpMetric	Marker interface for all no-op metrics.
SolrMetricProducer	Used by objects that expose metrics through SolrMetricManager.

Class Summary

Class	Description
AggregateMetric	This class is used for keeping several partial named values and providing useful statistics over them.
AggregateMetric.Update	Simple class to represent current value and how many times it was set.
AltBufferPoolMetricSet	This is an alternative implementation of BufferPoolMetricSet that doesn't need an MBean server.
DelegateRegistryCounter	A counter implementation that is aware of both primary and delegate metrics belonging to different registries and able to update metrics in multiple registries
DelegateRegistryHistogram	A meter implementation that is aware of both primary and delegate metrics belonging to different registries and able to update metrics in multiple registries
DelegateRegistryMeter	A meter implementation that is aware of both primary and delegate metrics belonging to different registries and able to update metrics in multiple registries
DelegateRegistryTimer	A timer implementation that is aware of both primary and delegate metrics belonging to different registries and able to update metrics in multiple registries
FilteringSolrMetricReporter	A SolrMetricReporter that supports (prefix) filters.
MetricsMap	Dynamically constructed map of metrics, intentionally different from MetricSet where each metric had to be known in advance and registered separately in MetricRegistry.
MetricSuppliers	Helper class for constructing instances of MetricRegistry.MetricSupplier based on plugin configuration.
MetricSuppliers.DefaultCounterSupplier	Default Counter supplier.
MetricSuppliers.DefaultHistogramSupplier	Default supplier of Histogram instances, with configurable reservoir.
MetricSuppliers.DefaultMeterSupplier	Default Meter supplier.
MetricSuppliers.DefaultTimerSupplier	Default supplier of Timer instances, with configurable clock and reservoir.
MetricSuppliers.NoOpCounterSupplier	No-op implementation of Counter supplier.
MetricSuppliers.NoOpGauge	No-op implementation of Gauge.
MetricSuppliers.NoOpHistogramSupplier	No-op implementation of Histogram supplier.
MetricSuppliers.NoOpMeterSupplier	No-op implementation of Meter supplier.
MetricSuppliers.NoOpTimerSupplier	No-op implementation of Timer supplier.
OperatingSystemMetricSet	This is an extended replacement for FileDescriptorRatioGauge - that class uses reflection and doesn't work under Java 9.
SolrCoreContainerReporter	A SolrMetricReporter that has access to its CoreContainer.
SolrCoreMetricManager	Helper class for managing registration of SolrMetricProducer's and SolrMetricReporter's specific to a SolrCore instance.
SolrCoreReporter	A FilteringSolrMetricReporter that has access to its SolrCore.
SolrDelegateRegistryMetricsContext	This class represents a metrics context that is delegate aware in that it is aware of multiple metric registries, a primary and a delegate.
SolrMetricInfo	Wraps meta-data for a metric.
SolrMetricManager	This class maintains a repository of named MetricRegistry instances, and provides several helper methods for managing various aspects of metrics reporting: registry creation, clearing and removal, creation of most common metric implementations, management of SolrMetricReporter-s specific to a named registry.
SolrMetricManager.AndFilter	An implementation of MetricFilter that selects metrics that match all filters in a list of filters.
SolrMetricManager.GaugeWrapper<T>	This is a wrapper for Gauge metrics, which are usually implemented as lambdas that often keep a reference to their parent instance.
SolrMetricManager.OrFilter	An implementation of MetricFilter that selects metrics that match any filter in a list of filters.
SolrMetricManager.PrefixFilter	An implementation of MetricFilter that selects metrics with names that start with one of prefixes.
SolrMetricManager.RegexFilter	An implementation of MetricFilter that selects metrics with names that match regular expression patterns.
SolrMetricReporter	Interface for 'pluggable' metric reporters.
SolrMetricsContext	This class represents a metrics context that ties together components with the same life-cycle and provides convenient access to the metric registry.

Enum Summary

Enum	Description
SolrMetricManager.ResolutionStrategy	Potential conflict resolution strategies when attempting to register a new metric that already exists