Statistics (Hibernate API Documentation) - Hibernate 3.2.4 正式版 API 英文文档

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org.hibernate.stat
Interface Statistics

All Known Subinterfaces:: StatisticsServiceMBean

All Known Implementing Classes:: StatisticsImpl, StatisticsService

public interface Statistics

Statistics for a particular SessionFactory. Beware of milliseconds metrics, they are depdendent of the JVM precision: you may then encounter a 10 ms approximation dending on you OS platform. Please refer to the JVM documentation for more information.

Author:: Emmanuel Bernard

Method Summary

void clear()
          reset all statistics

long getCloseStatementCount()
          The number of prepared statements that were released

long getCollectionFetchCount()
          Global number of collections fetched

long getCollectionLoadCount()
          Global number of collections loaded

long getCollectionRecreateCount()
          Global number of collections recreated

long getCollectionRemoveCount()
          Global number of collections removed

String[] getCollectionRoleNames()
          Get the names of all collection roles

CollectionStatistics getCollectionStatistics(String role)
          Get collection statistics per role

long getCollectionUpdateCount()
          Global number of collections updated

long getConnectCount()
          Get the global number of connections asked by the sessions (the actual number of connections used may be much smaller depending whether you use a connection pool or not)

long getEntityDeleteCount()
          Get global number of entity deletes

long getEntityFetchCount()
          Get global number of entity fetchs

long getEntityInsertCount()
          Get global number of entity inserts

long getEntityLoadCount()
          Get global number of entity loads

String[] getEntityNames()
          Get the names of all entities

EntityStatistics getEntityStatistics(String entityName)
          find entity statistics per name

long getEntityUpdateCount()
          Get global number of entity updates

long getFlushCount()
          Get the global number of flush executed by sessions (either implicit or explicit)

long getOptimisticFailureCount()
          The number of StaleObjectStateExceptions that occurred

long getPrepareStatementCount()
          The number of prepared statements that were acquired

String[] getQueries()
          Get all executed query strings

long getQueryCacheHitCount()
          Get the global number of cached queries successfully retrieved from cache

long getQueryCacheMissCount()
          Get the global number of cached queries *not* found in cache

long getQueryCachePutCount()
          Get the global number of cacheable queries put in cache

long getQueryExecutionCount()
          Get global number of executed queries

long getQueryExecutionMaxTime()
          Get the time in milliseconds of the slowest query.

String getQueryExecutionMaxTimeQueryString()
          Get the query string for the slowest query.

QueryStatistics getQueryStatistics(String queryString)
          Query statistics from query string (HQL or SQL)

long getSecondLevelCacheHitCount()
          Global number of cacheable entities/collections successfully retrieved from the cache

long getSecondLevelCacheMissCount()
          Global number of cacheable entities/collections not found in the cache and loaded from the database.

long getSecondLevelCachePutCount()
          Global number of cacheable entities/collections put in the cache

String[] getSecondLevelCacheRegionNames()
          Get all second-level cache region names

SecondLevelCacheStatistics getSecondLevelCacheStatistics(String regionName)
          Second level cache statistics per region

long getSessionCloseCount()
          Global number of sessions closed

long getSessionOpenCount()
          Global number of sessions opened

long getStartTime()


long getSuccessfulTransactionCount()
          The number of transactions we know to have been successful

long getTransactionCount()
          The number of transactions we know to have completed

boolean isStatisticsEnabled()
          Are statistics logged

void logSummary()
          log in info level the main statistics

void setStatisticsEnabled(boolean b)
          Enable statistics logs (this is a dynamic parameter)

Method Detail

clear

public void clear()

reset all statistics

getEntityStatistics

public EntityStatistics getEntityStatistics(String entityName)

find entity statistics per name

Parameters:: entityName - entity name
Returns:: EntityStatistics object

getCollectionStatistics

public CollectionStatistics getCollectionStatistics(String role)

Get collection statistics per role

Parameters:: role - collection role
Returns:: CollectionStatistics

getSecondLevelCacheStatistics

public SecondLevelCacheStatistics getSecondLevelCacheStatistics(String regionName)

Second level cache statistics per region

Parameters:: regionName - region name
Returns:: SecondLevelCacheStatistics

getQueryStatistics

public QueryStatistics getQueryStatistics(String queryString)

Query statistics from query string (HQL or SQL)

Parameters:: queryString - query string
Returns:: QueryStatistics

getEntityDeleteCount

public long getEntityDeleteCount()

Get global number of entity deletes

Returns:: entity deletion count

getEntityInsertCount

public long getEntityInsertCount()

Get global number of entity inserts

Returns:: entity insertion count

getEntityLoadCount

public long getEntityLoadCount()

Get global number of entity loads

Returns:: entity load (from DB)

getEntityFetchCount

public long getEntityFetchCount()

Get global number of entity fetchs

Returns:: entity fetch (from DB)

getEntityUpdateCount

public long getEntityUpdateCount()

Get global number of entity updates

Returns:: entity update

getQueryExecutionCount

public long getQueryExecutionCount()

Get global number of executed queries

Returns:: query execution count

getQueryExecutionMaxTime

public long getQueryExecutionMaxTime()

Get the time in milliseconds of the slowest query.

getQueryExecutionMaxTimeQueryString

public String getQueryExecutionMaxTimeQueryString()

Get the query string for the slowest query.

getQueryCacheHitCount

public long getQueryCacheHitCount()

Get the global number of cached queries successfully retrieved from cache

getQueryCacheMissCount

public long getQueryCacheMissCount()

Get the global number of cached queries *not* found in cache

getQueryCachePutCount

public long getQueryCachePutCount()

Get the global number of cacheable queries put in cache

getFlushCount

public long getFlushCount()

Get the global number of flush executed by sessions (either implicit or explicit)

getConnectCount

public long getConnectCount()

Get the global number of connections asked by the sessions (the actual number of connections used may be much smaller depending whether you use a connection pool or not)

getSecondLevelCacheHitCount

public long getSecondLevelCacheHitCount()

Global number of cacheable entities/collections successfully retrieved from the cache

getSecondLevelCacheMissCount

public long getSecondLevelCacheMissCount()

Global number of cacheable entities/collections not found in the cache and loaded from the database.

getSecondLevelCachePutCount

public long getSecondLevelCachePutCount()

Global number of cacheable entities/collections put in the cache

getSessionCloseCount

public long getSessionCloseCount()

Global number of sessions closed

getSessionOpenCount

public long getSessionOpenCount()

Global number of sessions opened

getCollectionLoadCount

public long getCollectionLoadCount()

Global number of collections loaded

getCollectionFetchCount

public long getCollectionFetchCount()

Global number of collections fetched

getCollectionUpdateCount

public long getCollectionUpdateCount()

Global number of collections updated

getCollectionRemoveCount

public long getCollectionRemoveCount()

Global number of collections removed

getCollectionRecreateCount

public long getCollectionRecreateCount()

Global number of collections recreated

getStartTime

public long getStartTime()

Returns:: start time in ms (JVM standards System.currentTimeMillis())

logSummary

public void logSummary()

isStatisticsEnabled

public boolean isStatisticsEnabled()

Are statistics logged

setStatisticsEnabled

public void setStatisticsEnabled(boolean b)

Enable statistics logs (this is a dynamic parameter)

getQueries

public String[] getQueries()

Get all executed query strings

getEntityNames

public String[] getEntityNames()

Get the names of all entities

getCollectionRoleNames

public String[] getCollectionRoleNames()

Get the names of all collection roles

getSecondLevelCacheRegionNames

public String[] getSecondLevelCacheRegionNames()

Get all second-level cache region names

getSuccessfulTransactionCount

public long getSuccessfulTransactionCount()

The number of transactions we know to have been successful

getTransactionCount

public long getTransactionCount()

The number of transactions we know to have completed

getPrepareStatementCount

public long getPrepareStatementCount()

The number of prepared statements that were acquired

getCloseStatementCount

public long getCloseStatementCount()

The number of prepared statements that were released

getOptimisticFailureCount

public long getOptimisticFailureCount()

The number of StaleObjectStateExceptions that occurred