Package io.ebean.meta

Interface MetaInfoManager

public interface MetaInfoManager

Provides access to the meta data in Database such as query execution statistics.

Method Summary

Modifier and Type	Method	Description
ServerMetrics	collectMetrics()	Return the metrics for the database instance.
List<MetricData>	collectMetricsAsData()	Return the metrics as a list of MetricData.
ServerMetricsAsJson	collectMetricsAsJson()	Collect the metrics in raw JSON form.
List<MetaQueryPlan>	queryPlanCollectNow(QueryPlanRequest request)	Collect query plans in the foreground.
List<MetaQueryPlan>	queryPlanInit(QueryPlanInit initRequest)	Initiate query plan collection by turning on "bind capture" on matching query plans.
void	resetAllMetrics()	Just reset all the metrics.
BasicMetricVisitor	visitBasic()	Run a visit collecting all the metrics and returning BasicMetricVisitor which holds all the metrics in simple lists.
void	visitMetrics(MetricVisitor visitor)	Visit the metrics resetting and collecting/reporting as desired.

Method Detail

collectMetrics

ServerMetrics collectMetrics()

Return the metrics for the database instance.

This will reset the metrics (reset counters back to zero etc) and will only return the non-empty metrics.

collectMetricsAsJson

ServerMetricsAsJson collectMetricsAsJson()

Collect the metrics in raw JSON form.

   String metricsJson = database.getMetaInfoManager()
       .collectMetricsAsJson()
       .json();

 

collectMetricsAsData

List<MetricData> collectMetricsAsData()

Return the metrics as a list of MetricData.

visitMetrics

void visitMetrics(MetricVisitor visitor)

Visit the metrics resetting and collecting/reporting as desired.

visitBasic

BasicMetricVisitor visitBasic()

Run a visit collecting all the metrics and returning BasicMetricVisitor which holds all the metrics in simple lists.

resetAllMetrics

void resetAllMetrics()

Just reset all the metrics. Maybe only useful for testing purposes.

queryPlanInit

List<MetaQueryPlan> queryPlanInit(QueryPlanInit initRequest)

Initiate query plan collection by turning on "bind capture" on matching query plans.

Also refer to ServerConfig collectQueryPlans that needs to be set to true and collectQueryPlanThresholdMicros which is a global defaults that can also initiate query plan capture.

Returns:

The query plans that have had bind capture turned on by this request.

queryPlanCollectNow

List<MetaQueryPlan> queryPlanCollectNow(QueryPlanRequest request)

Collect query plans in the foreground.