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io.ebean.meta.MetaInfoManager Maven / Gradle / Ivy

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package io.ebean.meta;

import java.util.List;

/**
 * Provides access to the meta data in Database such as query execution statistics.
 */
public interface MetaInfoManager {

  /**
   * 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. *

*/ ServerMetrics collectMetrics(); /** * Visit the metrics resetting and collecting/reporting as desired. */ void visitMetrics(MetricVisitor visitor); /** * Run a visit collecting all the metrics and returning BasicMetricVisitor * which holds all the metrics in simple lists. */ BasicMetricVisitor visitBasic(); /** * Just reset all the metrics. Maybe only useful for testing purposes. */ void resetAllMetrics(); /** * Initiate query plan collection by turning on "bind capture" on matching query plans. *

* Also refer to DatabaseConfig collectQueryPlans that needs to be set to true * and collectQueryPlanThresholdMicros which is a global defaults that can also * initiate query plan capture. * * @return The query plans that have had bind capture turned on by this request. */ List queryPlanInit(QueryPlanInit initRequest); /** * Collect query plans in the foreground. */ List queryPlanCollectNow(QueryPlanRequest request); }





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