fish.payara.jdbc.stats.SlowSqlTraceCache Maven / Gradle / Ivy
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package fish.payara.jdbc.stats;
import com.sun.gjc.util.SQLTrace;
import com.sun.gjc.util.SQLTraceCache;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
*
* @author Andrew Pielage
*/
public class SlowSqlTraceCache extends SQLTraceCache {
public SlowSqlTraceCache(String poolName, int maxNumberOfQueries, long timeToKeepQueries) {
super(poolName, maxNumberOfQueries, timeToKeepQueries);
}
/**
* Request for adding a sql query in the form of SlowSqlTrace 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 its slowest execution time has also increased, this is updated.
* If the query is a new one, it is added to the list.
*
* @param sqlTrace
*/
@Override
public void checkAndUpdateCache(SQLTrace sqlTrace) {
if (sqlTrace != null) {
// Cast to a slowSqlTrace object
SlowSqlTrace slowSqlTrace = (SlowSqlTrace) sqlTrace;
SlowSqlTrace storedSlowSqlTrace = (SlowSqlTrace) cache.get(slowSqlTrace.getQueryName());
if (storedSlowSqlTrace != null) {
//If already found in the cache
storedSlowSqlTrace.setNumExecutions(storedSlowSqlTrace.getNumExecutions() + 1);
storedSlowSqlTrace.setLastUsageTime(System.currentTimeMillis());
long newExecutionTime = slowSqlTrace.getSlowestExecutionTime();
if (storedSlowSqlTrace.getSlowestExecutionTime() < newExecutionTime) {
storedSlowSqlTrace.setSlowestExecutionTime(newExecutionTime);
}
} else {
cache.put(slowSqlTrace.getQueryName(), slowSqlTrace);
}
}
}
/**
* Overrides the purgeEntries method to purge the quickest running SQL Traces
*/
@Override
public void purgeEntries() {
List slowSqlTraceList = new ArrayList(cache.values());
Collections.sort(slowSqlTraceList, SlowSqlTrace.SlowSqlTraceSlowestExecutionComparator);
int elementCount = slowSqlTraceList.size();
while (elementCount > numTopQueriesToReport) {
SlowSqlTrace slowSqlTrace = slowSqlTraceList.get(elementCount - 1);
cache.remove(slowSqlTrace.getQueryName());
slowSqlTraceList.remove(slowSqlTrace);
elementCount --;
}
}
/**
* Returns the slowest SQL traces.
* @return A String representation of the slowest SQL Traces
*/
public List getSlowestSqlQueries() {
purgeEntries();
List slowSqlTraceList = new ArrayList(cache.values());
Collections.sort(slowSqlTraceList, SlowSqlTrace.SlowSqlTraceSlowestExecutionComparator);
return slowSqlTraceList;
}
}