com.sun.gjc.util

Class FrequentSQLTraceCache

java.lang.Object

com.sun.gjc.util.SQLTraceCache

com.sun.gjc.util.FrequentSQLTraceCache

public class FrequentSQLTraceCache
extends SQLTraceCache

Maintains the Sql Tracing Cache used to store SQL statements used by the applications. This is used by the JDBCRA monitoring to display the most frequently used queries by applications.

Author:

Shalini M

Field Summary

Fields

Modifier and Type	Field and Description
protected long	maxStoredEntries

Fields inherited from class com.sun.gjc.util.SQLTraceCache

_logger, cache, LINE_BREAK, numTopQueriesToReport, poolName, timeToKeepQueries

Constructor Summary

Constructors

Constructor and Description
FrequentSQLTraceCache(String poolName, int numToReport, long timeToKeepQueries)
FrequentSQLTraceCache(String poolName, int numToReport, long timeToKeepQueries, long maxStoredEntries)

Method Summary

Modifier and Type	Method and Description
void	checkAndUpdateCache(SQLTrace cacheObj) Request for adding a sql query in the form of SQLTrace to this cache.
String	getTopQueries() Returns the String representation of the list of traced sql queries ordered by the number most frequently used, followed by the usage timestamp.

Methods inherited from class com.sun.gjc.util.SQLTraceCache

cancelTimerTask, getPoolName, getSqlTraceList, purgeEntries, scheduleTimerTask

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

maxStoredEntries

protected long maxStoredEntries

Constructor Detail

FrequentSQLTraceCache

public FrequentSQLTraceCache(String poolName,
                             int numToReport,
                             long timeToKeepQueries)

FrequentSQLTraceCache

public FrequentSQLTraceCache(String poolName,
                             int numToReport,
                             long timeToKeepQueries,
                             long maxStoredEntries)

Method Detail

checkAndUpdateCache

public void checkAndUpdateCache(SQLTrace cacheObj)

Request for adding a sql query in the form of SQLTrace to this cache. If the query is already found in the list, the number of times it is executed is incremented by one along with the timestamp. If the query is a new one, it is added to the list.

Specified by:

checkAndUpdateCache in class SQLTraceCache

Parameters:

cacheObj -

getTopQueries

public String getTopQueries()

Returns the String representation of the list of traced sql queries ordered by the number most frequently used, followed by the usage timestamp. Only the top 'n' queries represented by the numTopQueriesToReport are chosen for display.

Returns:

string representation of the list of sql queries sorted