//$Id: Statistics.java 8262 2005-09-30 07:48:53Z oneovthafew $
package org.hibernate.stat;
/**
* Statistics for a particular <tt>SessionFactory</tt>.
* 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
*/
public interface Statistics {
/**
* reset all statistics
*/
public void clear();
/**
* find entity statistics per name
*
* @param entityName entity name
* @return EntityStatistics object
*/
public EntityStatistics getEntityStatistics(String entityName);
/**
* Get collection statistics per role
*
* @param role collection role
* @return CollectionStatistics
*/
public CollectionStatistics getCollectionStatistics(String role);
/**
* Second level cache statistics per region
*
* @param regionName region name
* @return SecondLevelCacheStatistics
*/
public SecondLevelCacheStatistics getSecondLevelCacheStatistics(String regionName);
/**
* Query statistics from query string (HQL or SQL)
*
* @param queryString query string
* @return QueryStatistics
*/
public QueryStatistics getQueryStatistics(String queryString);
/**
* Get global number of entity deletes
* @return entity deletion count
*/
public long getEntityDeleteCount();
/**
* Get global number of entity inserts
* @return entity insertion count
*/
public long getEntityInsertCount();
/**
* Get global number of entity loads
* @return entity load (from DB)
*/
public long getEntityLoadCount();
/**
* Get global number of entity fetchs
* @return entity fetch (from DB)
*/
public long getEntityFetchCount();
/**
* Get global number of entity updates
* @return entity update
*/
public long getEntityUpdateCount();
/**
* Get global number of executed queries
* @return query execution count
*/
public long getQueryExecutionCount();
/**
* Get the time in milliseconds of the slowest query.
*/
public long getQueryExecutionMaxTime();
/**
* Get the query string for the slowest query.
*/
public String getQueryExecutionMaxTimeQueryString();
/**
* Get the global number of cached queries successfully retrieved from cache
*/
public long getQueryCacheHitCount();
/**
* Get the global number of cached queries *not* found in cache
*/
public long getQueryCacheMissCount();
/**
* Get the global number of cacheable queries put in cache
*/
public long getQueryCachePutCount();
/**
* Get the global number of flush executed by sessions (either implicit or explicit)
*/
public long getFlushCount();
/**
* 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)
*/
public long getConnectCount();
/**
* Global number of cacheable entities/collections successfully retrieved from the cache
*/
public long getSecondLevelCacheHitCount();
/**
* Global number of cacheable entities/collections not found in the cache and loaded from the database.
*/
public long getSecondLevelCacheMissCount();
/**
* Global number of cacheable entities/collections put in the cache
*/
public long getSecondLevelCachePutCount();
/**
* Global number of sessions closed
*/
public long getSessionCloseCount();
/**
* Global number of sessions opened
*/
public long getSessionOpenCount();
/**
* Global number of collections loaded
*/
public long getCollectionLoadCount();
/**
* Global number of collections fetched
*/
public long getCollectionFetchCount();
/**
* Global number of collections updated
*/
public long getCollectionUpdateCount();
/**
* Global number of collections removed
*/
//even on inverse="true"
public long getCollectionRemoveCount();
/**
* Global number of collections recreated
*/
public long getCollectionRecreateCount();
/**
* @return start time in ms (JVM standards {@link System#currentTimeMillis()})
*/
public long getStartTime();
/**
* log in info level the main statistics
*/
public void logSummary();
/**
* Are statistics logged
*/
public boolean isStatisticsEnabled();
/**
* Enable statistics logs (this is a dynamic parameter)
*/
public void setStatisticsEnabled(boolean b);
/**
* Get all executed query strings
*/
public String[] getQueries();
/**
* Get the names of all entities
*/
public String[] getEntityNames();
/**
* Get the names of all collection roles
*/
public String[] getCollectionRoleNames();
/**
* Get all second-level cache region names
*/
public String[] getSecondLevelCacheRegionNames();
/**
* The number of transactions we know to have been successful
*/
public long getSuccessfulTransactionCount();
/**
* The number of transactions we know to have completed
*/
public long getTransactionCount();
/**
* The number of prepared statements that were acquired
*/
public long getPrepareStatementCount();
/**
* The number of prepared statements that were released
*/
public long getCloseStatementCount();
/**
* The number of <tt>StaleObjectStateException</tt>s
* that occurred
*/
public long getOptimisticFailureCount();
}
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