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java.lang.Objectorg.apache.openjpa.kernel.QueryStatistics.Default<T>
public static class QueryStatistics.Default<T>
A default implementation. Maintains statistics for only a fixed number of queries. Statistical counts are approximate and not exact (to keep thread synchorization overhead low).
| Nested Class Summary |
|---|
| Nested classes/interfaces inherited from interface org.apache.openjpa.kernel.QueryStatistics |
|---|
QueryStatistics.Default<T>, QueryStatistics.None<T> |
| Constructor Summary | |
|---|---|
QueryStatistics.Default()
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|
| 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. |
(package private) long |
pct(long per,
long cent)
|
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. |
(package private) String |
toString(long[] row)
|
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
public QueryStatistics.Default()
| Method Detail |
|---|
public Set<T> keys()
QueryStatistics
keys in interface QueryStatistics<T>public long getExecutionCount()
QueryStatistics
getExecutionCount in interface QueryStatistics<T>public long getTotalExecutionCount()
QueryStatistics
getTotalExecutionCount in interface QueryStatistics<T>public long getExecutionCount(T query)
QueryStatistics
getExecutionCount in interface QueryStatistics<T>public long getTotalExecutionCount(T query)
QueryStatistics
getTotalExecutionCount in interface QueryStatistics<T>public long getHitCount()
QueryStatistics
getHitCount in interface QueryStatistics<T>public long getTotalHitCount()
QueryStatistics
getTotalHitCount in interface QueryStatistics<T>public long getHitCount(T query)
QueryStatistics
getHitCount in interface QueryStatistics<T>public long getTotalHitCount(T query)
QueryStatistics
getTotalHitCount in interface QueryStatistics<T>public Date since()
QueryStatistics
since in interface QueryStatistics<T>public Date start()
QueryStatistics
start in interface QueryStatistics<T>public void reset()
QueryStatistics
reset in interface QueryStatistics<T>public void clear()
QueryStatistics
clear in interface QueryStatistics<T>public void recordExecution(T query)
QueryStatistics
recordExecution in interface QueryStatistics<T>public void recordEviction(T query)
QueryStatistics
recordEviction in interface QueryStatistics<T>public void dump(PrintStream out)
QueryStatistics
dump in interface QueryStatistics<T>
long pct(long per,
long cent)
String toString(long[] row)
public long getEvictionCount()
QueryStatistics
getEvictionCount in interface QueryStatistics<T>public long getTotalEvictionCount()
QueryStatistics
getTotalEvictionCount in interface QueryStatistics<T>
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