org.apache.openjpa.kernel
Interface QueryStatistics<T>

All Superinterfaces:

Serializable

All Known Implementing Classes:

AbstractQueryCache.Default, QueryStatistics.Default, QueryStatistics.None

public interface QueryStatistics<T>
extends Serializable

Records query execution statistics. Statistics can be reset. Gathers both accumulated statistics since start as well as statistics since last reset.

Since:

1.3.0

Author:

Pinaki Poddar

Nested Class Summary

static class	QueryStatistics.Default<T> A default implementation.
static class	QueryStatistics.None<T> A do-nothing implementation.

Method Summary

void	clear() Clears all statistics accumulated since start.
void	dump(PrintStream out) Dumps on the given output stream.
long	getEvictionCount() Gets number of total query evictions since last reset.
long	getExecutionCount() Gets number of total query execution since last reset.
long	getExecutionCount(T query) Gets number of executions for the given query since last reset.
long	getHitCount() Gets number of total query execution that are cached since last reset.
long	getHitCount(T query) Gets number of executions for the given query that are cached since last reset.
long	getTotalEvictionCount() Gets number of total query evictions since start.
long	getTotalExecutionCount() Gets number of total query execution since start.
long	getTotalExecutionCount(T query) Gets number of executions for the given query since start.
long	getTotalHitCount() Gets number of total query execution that are cached since start.
long	getTotalHitCount(T query) Gets number of executions for the given query that are cached since start.
Set<T>	keys() Gets all the identifier keys for the cached queries.
void	recordEviction(T query) Record that the given query has been evicted.
void	recordExecution(T query) Record that the given query has been executed.
void	reset() Clears all statistics accumulated since last reset.
Date	since() Gets the time of last reset.
Date	start() Gets the time of start.

Method Detail

keys

Set<T> keys()

Gets all the identifier keys for the cached queries.

recordExecution

void recordExecution(T query)

Record that the given query has been executed.

recordEviction

void recordEviction(T query)

Record that the given query has been evicted.

getExecutionCount

long getExecutionCount()

Gets number of total query execution since last reset.

getTotalExecutionCount

long getTotalExecutionCount()

Gets number of total query execution since start.

getExecutionCount

long getExecutionCount(T query)

Gets number of executions for the given query since last reset.

getTotalExecutionCount

long getTotalExecutionCount(T query)

Gets number of executions for the given query since start.

getHitCount

long getHitCount()

Gets number of total query execution that are cached since last reset.

getTotalHitCount

long getTotalHitCount()

Gets number of total query execution that are cached since start.

getHitCount

long getHitCount(T query)

Gets number of executions for the given query that are cached since last reset.

getTotalHitCount

long getTotalHitCount(T query)

Gets number of executions for the given query that are cached since start.

getEvictionCount

long getEvictionCount()

Gets number of total query evictions since last reset.

getTotalEvictionCount

long getTotalEvictionCount()

Gets number of total query evictions since start.

since

Date since()

Gets the time of last reset.

start

Date start()

Gets the time of start.

reset

void reset()

Clears all statistics accumulated since last reset.

clear

void clear()

Clears all statistics accumulated since start.

dump

void dump(PrintStream out)

Dumps on the given output stream.