/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2012 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
//Portions Copyright [2016] [Payara Foundation]
package org.glassfish.jdbc.pool.monitor;
import com.sun.enterprise.connectors.ConnectorRuntime;
import com.sun.enterprise.resource.pool.PoolLifeCycleListenerRegistry;
import com.sun.enterprise.resource.pool.PoolStatus;
import org.glassfish.external.probe.provider.annotations.ProbeListener;
import org.glassfish.external.probe.provider.annotations.ProbeParam;
import org.glassfish.external.statistics.CountStatistic;
import org.glassfish.external.statistics.RangeStatistic;
import org.glassfish.external.statistics.annotations.Reset;
import org.glassfish.external.statistics.impl.CountStatisticImpl;
import org.glassfish.external.statistics.impl.RangeStatisticImpl;
import org.glassfish.external.statistics.impl.StatisticImpl;
import org.glassfish.gmbal.AMXMetadata;
import org.glassfish.gmbal.Description;
import org.glassfish.gmbal.ManagedAttribute;
import org.glassfish.gmbal.ManagedObject;
import org.glassfish.resourcebase.resources.api.PoolInfo;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* StatsProvider object for Jdbc pool monitoring.
*
* Implements various events related to jdbc pool monitoring and provides
* objects to the calling modules that retrieve monitoring information.
*
* @author Shalini M
*/
@AMXMetadata(type="jdbc-connection-pool-mon", group="monitoring")
@ManagedObject
@Description("JDBC Statistics")
public class JdbcConnPoolStatsProvider {
private PoolInfo poolInfo;
private Logger logger;
//Registry that stores all listeners to this object
private PoolLifeCycleListenerRegistry poolRegistry;
//Objects that are exposed by this telemetry
private CountStatisticImpl numConnFailedValidation = new CountStatisticImpl(
"NumConnFailedValidation", StatisticImpl.UNIT_COUNT,
"The total number of connections in the connection pool that failed " +
"validation from the start time until the last sample time.");
private CountStatisticImpl numConnTimedOut = new CountStatisticImpl(
"NumConnTimedOut", StatisticImpl.UNIT_COUNT, "The total number of " +
"connections in the pool that timed out between the start time and the last sample time.");
private RangeStatisticImpl numConnFree = new RangeStatisticImpl(
0, 0, 0,
"NumConnFree", StatisticImpl.UNIT_COUNT, "The total number of free " +
"connections in the pool as of the last sampling.",
System.currentTimeMillis(), System.currentTimeMillis());
private RangeStatisticImpl numConnUsed = new RangeStatisticImpl(
0, 0, 0,
"NumConnUsed", StatisticImpl.UNIT_COUNT, "Provides connection usage " +
"statistics. The total number of connections that are currently being " +
"used, as well as information about the maximum number of connections " +
"that were used (the high water mark).",
System.currentTimeMillis(), System.currentTimeMillis());
private RangeStatisticImpl connRequestWaitTime = new RangeStatisticImpl(
0, 0, 0,
"ConnRequestWaitTime", StatisticImpl.UNIT_MILLISECOND,
"The longest and shortest wait times of connection requests. The " +
"current value indicates the wait time of the last request that was " +
"serviced by the pool.",
System.currentTimeMillis(), System.currentTimeMillis());
private CountStatisticImpl numConnDestroyed = new CountStatisticImpl(
"NumConnDestroyed", StatisticImpl.UNIT_COUNT,
"Number of physical connections that were destroyed since the last reset.");
private CountStatisticImpl numConnAcquired = new CountStatisticImpl(
"NumConnAcquired", StatisticImpl.UNIT_COUNT, "Number of logical " +
"connections acquired from the pool.");
private CountStatisticImpl numConnReleased = new CountStatisticImpl(
"NumConnReleased", StatisticImpl.UNIT_COUNT, "Number of logical " +
"connections released to the pool.");
private CountStatisticImpl numConnCreated = new CountStatisticImpl(
"NumConnCreated", StatisticImpl.UNIT_COUNT,
"The number of physical connections that were created since the last reset.");
private CountStatisticImpl numPotentialConnLeak = new CountStatisticImpl(
"NumPotentialConnLeak", StatisticImpl.UNIT_COUNT,
"Number of potential connection leaks");
private CountStatisticImpl numConnSuccessfullyMatched = new CountStatisticImpl(
"NumConnSuccessfullyMatched", StatisticImpl.UNIT_COUNT,
"Number of connections succesfully matched");
private CountStatisticImpl numConnNotSuccessfullyMatched = new CountStatisticImpl(
"NumConnNotSuccessfullyMatched", StatisticImpl.UNIT_COUNT,
"Number of connections rejected during matching");
private CountStatisticImpl totalConnRequestWaitTime = new CountStatisticImpl(
"TotalConnRequestWaitTime", StatisticImpl.UNIT_MILLISECOND,
"Total wait time per successful connection request");
private CountStatisticImpl averageConnWaitTime = new CountStatisticImpl(
"AverageConnWaitTime", StatisticImpl.UNIT_MILLISECOND,
"Average wait-time-duration per successful connection request");
private CountStatisticImpl waitQueueLength = new CountStatisticImpl(
"WaitQueueLength", StatisticImpl.UNIT_COUNT,
"Number of connection requests in the queue waiting to be serviced.");
private static final String JDBC_PROBE_LISTENER = "glassfish:jdbc:connection-pool:";
public JdbcConnPoolStatsProvider(PoolInfo poolInfo, Logger logger) {
this.poolInfo = poolInfo;
this.logger = logger;
}
/**
* Whenever connection leak happens, increment numPotentialConnLeak
* @param pool JdbcConnectionPool that got a connLeakEvent
*/
@ProbeListener(JDBC_PROBE_LISTENER + "potentialConnLeakEvent")
public void potentialConnLeakEvent(@ProbeParam("poolName") String poolName,
@ProbeParam("appName") String appName,
@ProbeParam("moduleName") String moduleName
) {
// handle the conn leak probe event
PoolInfo poolInfo = new PoolInfo(poolName, appName, moduleName);
if(this.poolInfo.equals(poolInfo)) {
if(logger.isLoggable(Level.FINEST)) {
logger.finest("Connection Leak event received - poolName = " +
poolName);
}
//TODO V3: Checking if this is a valid event
//Increment counter
numPotentialConnLeak.increment();
}
}
/**
* Whenever connection timed-out event occurs, increment numConnTimedOut
* @param pool JdbcConnectionPool that got a connTimedOutEvent
*/
@ProbeListener(JDBC_PROBE_LISTENER + "connectionTimedOutEvent")
public void connectionTimedOutEvent(@ProbeParam("poolName") String poolName,
@ProbeParam("appName") String appName,
@ProbeParam("moduleName") String moduleName
) {
// handle the conn timed out probe event
PoolInfo poolInfo = new PoolInfo(poolName, appName, moduleName);
if(this.poolInfo.equals(poolInfo)) {
if(logger.isLoggable(Level.FINEST)) {
logger.finest("Connection Timed-out event received - poolName = " +
poolName);
}
//Increment counter
numConnTimedOut.increment();
}
}
/**
* Decrement numconnfree event
* @param poolName
* @param steadyPoolSize
*/
@ProbeListener(JDBC_PROBE_LISTENER + "decrementNumConnFreeEvent")
public void decrementNumConnFreeEvent(
@ProbeParam("poolName") String poolName,
@ProbeParam("appName") String appName,
@ProbeParam("moduleName") String moduleName
) {
// handle the num conn free decrement event
PoolInfo poolInfo = new PoolInfo(poolName, appName, moduleName);
if(this.poolInfo.equals(poolInfo)) {
if(logger.isLoggable(Level.FINEST)) {
logger.finest("Decrement Num Connections Free event received - poolName = " +
poolName);
}
//Decrement counter
synchronized(numConnFree) {
numConnFree.setCurrent(numConnFree.getCurrent() - 1);
}
}
}
/**
* Increment numconnfree event
* @param poolName
* @param steadyPoolSize
*/
@ProbeListener(JDBC_PROBE_LISTENER + "incrementNumConnFreeEvent")
public void incrementNumConnFreeEvent(
@ProbeParam("poolName") String poolName,
@ProbeParam("appName") String appName,
@ProbeParam("moduleName") String moduleName,
@ProbeParam("beingDestroyed") boolean beingDestroyed,
@ProbeParam("steadyPoolSize") int steadyPoolSize) {
// handle the num conn free increment event
PoolInfo poolInfo = new PoolInfo(poolName, appName, moduleName);
if(this.poolInfo.equals(poolInfo)) {
if(logger.isLoggable(Level.FINEST)) {
logger.finest("Increment Num Connections Free event received - poolName = " +
poolName);
}
if(beingDestroyed) {
//if pruned by resizer thread
synchronized(numConnFree) {
synchronized(numConnUsed) {
if(numConnFree.getCurrent() + numConnUsed.getCurrent() < steadyPoolSize) {
numConnFree.setCurrent(numConnFree.getCurrent() + 1);
}
}
}
} else {
synchronized(numConnFree) {
numConnFree.setCurrent(numConnFree.getCurrent() + 1);
}
}
}
}
/**
* Decrement numConnUsed event
* @param poolName
* @param beingDestroyed if the connection is destroyed due to error
* @param steadyPoolSize
*/
@ProbeListener(JDBC_PROBE_LISTENER + "decrementConnectionUsedEvent")
public void decrementConnectionUsedEvent(
@ProbeParam("poolName") String poolName,
@ProbeParam("appName") String appName,
@ProbeParam("moduleName") String moduleName
) {
// handle the num conn used decrement event
PoolInfo poolInfo = new PoolInfo(poolName, appName, moduleName);
if(this.poolInfo.equals(poolInfo)) {
if(logger.isLoggable(Level.FINEST)) {
logger.finest("Decrement Num Connections Used event received - poolName = " +
poolName);
}
//Decrement numConnUsed counter
synchronized(numConnUsed) {
numConnUsed.setCurrent(numConnUsed.getCurrent() - 1);
}
}
}
/**
* Connections freed event
* @param poolName
* @param count number of connections freed to the pool
*/
@ProbeListener(JDBC_PROBE_LISTENER + "connectionsFreedEvent")
public void connectionsFreedEvent(
@ProbeParam("poolName") String poolName,
@ProbeParam("appName") String appName,
@ProbeParam("moduleName") String moduleName,
@ProbeParam("count") int count) {
// handle the connections freed event
PoolInfo poolInfo = new PoolInfo(poolName, appName, moduleName);
if(this.poolInfo.equals(poolInfo)) {
if(logger.isLoggable(Level.FINEST)) {
logger.finest("Connections Freed event received - poolName = " +
poolName);
logger.finest("numConnUsed =" + numConnUsed.getCurrent() +
" numConnFree=" + numConnFree.getCurrent() +
" Number of connections freed =" + count);
}
//set numConnFree to the count value
synchronized(numConnFree) {
numConnFree.setCurrent(count);
}
}
}
/**
* Connection used event
* @param poolName
*/
@ProbeListener(JDBC_PROBE_LISTENER + "connectionUsedEvent")
public void connectionUsedEvent(
@ProbeParam("poolName") String poolName,
@ProbeParam("appName") String appName,
@ProbeParam("moduleName") String moduleName
) {
// handle the connection used event
PoolInfo poolInfo = new PoolInfo(poolName, appName, moduleName);
if(this.poolInfo.equals(poolInfo)) {
if(logger.isLoggable(Level.FINEST)) {
logger.finest("Connection Used event received - poolName = " +
poolName);
}
//increment numConnUsed
synchronized(numConnUsed) {
numConnUsed.setCurrent(numConnUsed.getCurrent() + 1);
}
}
}
/**
* Whenever connection leak happens, increment numConnFailedValidation
* @param pool JdbcConnectionPool that got a failed validation event
*/
@ProbeListener(JDBC_PROBE_LISTENER + "connectionValidationFailedEvent")
public void connectionValidationFailedEvent(
@ProbeParam("poolName") String poolName,
@ProbeParam("appName") String appName,
@ProbeParam("moduleName") String moduleName,
@ProbeParam("increment") int increment) {
PoolInfo poolInfo = new PoolInfo(poolName, appName, moduleName);
if(this.poolInfo.equals(poolInfo)) {
if(logger.isLoggable(Level.FINEST)) {
logger.finest("Connection Validation Failed event received - " +
"poolName = " + poolName);
}
//TODO V3 : add support in CounterImpl for addAndGet(increment)
numConnFailedValidation.increment(increment);
}
}
/**
* Event that a connection request is served in timeTakenInMillis.
*
* @param poolName
* @param timeTakenInMillis
*/
@ProbeListener(JDBC_PROBE_LISTENER + "connectionRequestServedEvent")
public void connectionRequestServedEvent(
@ProbeParam("poolName") String poolName,
@ProbeParam("appName") String appName,
@ProbeParam("moduleName") String moduleName,
@ProbeParam("timeTakenInMillis") long timeTakenInMillis) {
PoolInfo poolInfo = new PoolInfo(poolName, appName, moduleName);
if(this.poolInfo.equals(poolInfo)) {
if(logger.isLoggable(Level.FINEST)) {
logger.finest("Connection request served event received - " +
"poolName = " + poolName);
}
connRequestWaitTime.setCurrent(timeTakenInMillis);
totalConnRequestWaitTime.increment(timeTakenInMillis);
}
}
/**
* When connection destroyed event is got increment numConnDestroyed.
*/
@ProbeListener(JDBC_PROBE_LISTENER + "connectionDestroyedEvent")
public void connectionDestroyedEvent(
@ProbeParam("poolName") String poolName,
@ProbeParam("appName") String appName,
@ProbeParam("moduleName") String moduleName
) {
PoolInfo poolInfo = new PoolInfo(poolName, appName, moduleName);
if(this.poolInfo.equals(poolInfo)) {
if(logger.isLoggable(Level.FINEST)) {
logger.finest("Connection destroyed event received - " +
"poolName = " + poolName);
}
numConnDestroyed.increment();
}
}
/**
* When a connection is acquired increment counter
*/
@ProbeListener(JDBC_PROBE_LISTENER + "connectionAcquiredEvent")
public void connectionAcquiredEvent(
@ProbeParam("poolName") String poolName,
@ProbeParam("appName") String appName,
@ProbeParam("moduleName") String moduleName
) {
PoolInfo poolInfo = new PoolInfo(poolName, appName, moduleName);
if(this.poolInfo.equals(poolInfo)) {
if(logger.isLoggable(Level.FINEST)) {
logger.finest("Connection acquired event received - " +
"poolName = " + poolName);
}
numConnAcquired.increment();
}
}
/**
* When a connection is released increment counter
*/
@ProbeListener(JDBC_PROBE_LISTENER + "connectionReleasedEvent")
public void connectionReleasedEvent(
@ProbeParam("poolName") String poolName,
@ProbeParam("appName") String appName,
@ProbeParam("moduleName") String moduleName
) {
PoolInfo poolInfo = new PoolInfo(poolName, appName, moduleName);
if(this.poolInfo.equals(poolInfo)) {
if(logger.isLoggable(Level.FINEST)) {
logger.finest("Connection released event received - " +
"poolName = " + poolName);
}
numConnReleased.increment();
}
}
/**
* When a connection is created increment counter
*/
@ProbeListener(JDBC_PROBE_LISTENER + "connectionCreatedEvent")
public void connectionCreatedEvent(
@ProbeParam("poolName") String poolName,
@ProbeParam("appName") String appName,
@ProbeParam("moduleName") String moduleName
) {
PoolInfo poolInfo = new PoolInfo(poolName, appName, moduleName);
if(this.poolInfo.equals(poolInfo)) {
if(logger.isLoggable(Level.FINEST)) {
logger.finest("Connection created event received - " +
"poolName = " + poolName);
}
numConnCreated.increment();
}
}
/**
* Reset pool statistics.
* When annotated with @Reset, this method is invoked whenever monitoring
* is turned to HIGH from OFF, thereby setting the statistics to
* appropriate values.
*/
@Reset
public void reset() {
if(logger.isLoggable(Level.FINEST)) {
logger.finest("Reset event received - poolInfo = " + poolInfo);
}
PoolStatus status = ConnectorRuntime.getRuntime().getPoolManager().getPoolStatus(poolInfo);
numConnUsed.setCurrent(status.getNumConnUsed());
numConnFree.setCurrent(status.getNumConnFree());
numConnCreated.reset();
numConnDestroyed.reset();
numConnFailedValidation.reset();
numConnTimedOut.reset();
numConnAcquired.reset();
numConnReleased.reset();
connRequestWaitTime.reset();
numConnSuccessfullyMatched.reset();
numConnNotSuccessfullyMatched.reset();
numPotentialConnLeak.reset();
averageConnWaitTime.reset();
totalConnRequestWaitTime.reset();
waitQueueLength.reset();
}
/**
* When connection under test matches the current request ,
* increment numConnSuccessfullyMatched.
*/
@ProbeListener(JDBC_PROBE_LISTENER + "connectionMatchedEvent")
public void connectionMatchedEvent(
@ProbeParam("poolName") String poolName,
@ProbeParam("appName") String appName,
@ProbeParam("moduleName") String moduleName
) {
PoolInfo poolInfo = new PoolInfo(poolName, appName, moduleName);
if(this.poolInfo.equals(poolInfo)) {
if(logger.isLoggable(Level.FINEST)) {
logger.finest("Connection matched event received - " +
"poolName = " + poolName);
}
numConnSuccessfullyMatched.increment();
}
}
/**
* When a connection under test does not match the current request,
* increment numConnNotSuccessfullyMatched.
*/
@ProbeListener(JDBC_PROBE_LISTENER + "connectionNotMatchedEvent")
public void connectionNotMatchedEvent(
@ProbeParam("poolName") String poolName,
@ProbeParam("appName") String appName,
@ProbeParam("moduleName") String moduleName
) {
PoolInfo poolInfo = new PoolInfo(poolName, appName, moduleName);
if(this.poolInfo.equals(poolInfo)) {
if(logger.isLoggable(Level.FINEST)) {
logger.finest("Connection not matched event received - " +
"poolName = " + poolName);
}
numConnNotSuccessfullyMatched.increment();
}
}
/**
* When an object is added to wait queue, increment the waitQueueLength.
*/
@ProbeListener(JDBC_PROBE_LISTENER + "connectionRequestQueuedEvent")
public void connectionRequestQueuedEvent(
@ProbeParam("poolName") String poolName,
@ProbeParam("appName") String appName,
@ProbeParam("moduleName") String moduleName
) {
PoolInfo poolInfo = new PoolInfo(poolName, appName, moduleName);
if(this.poolInfo.equals(poolInfo)) {
if(logger.isLoggable(Level.FINEST)) {
logger.finest("Wait Queue length modified event received - " +
"poolName = " + poolName);
}
waitQueueLength.increment();
}
}
/**
* When an object is removed from the wait queue, decrement the waitQueueLength.
*/
@ProbeListener(JDBC_PROBE_LISTENER + "connectionRequestDequeuedEvent")
public void connectionRequestDequeuedEvent(
@ProbeParam("poolName") String poolName,
@ProbeParam("appName") String appName,
@ProbeParam("moduleName") String moduleName
) {
PoolInfo poolInfo = new PoolInfo(poolName, appName, moduleName);
if(this.poolInfo.equals(poolInfo)) {
if(logger.isLoggable(Level.FINEST)) {
logger.finest("Wait Queue length modified event received - " +
"poolName = " + poolName);
}
waitQueueLength.decrement();
}
}
public PoolInfo getPoolInfo() {
return poolInfo;
}
public void setPoolRegistry(PoolLifeCycleListenerRegistry poolRegistry) {
this.poolRegistry = poolRegistry;
}
public PoolLifeCycleListenerRegistry getPoolRegistry() {
return poolRegistry;
}
/**
* When a connection leak is observed, the monitoring statistics are displayed
* to the server.log. This method helps in segregating the statistics based
* on LOW/HIGH monitoring levels and displaying them.
*
* @param poolName
* @param stackTrace
*/
//TODO V3 need this?
/*@ProbeListener("glassfish:connector:jdbc-connection-pool:toString")
public void toString(@ProbeParam("poolName") String poolName,
@ProbeParam("stackTrace") StringBuffer stackTrace) {
logger.finest("toString(poolName) event received. " +
"poolName = " + poolName);
if((poolName != null) && (poolName.equals(this.jdbcPoolName))) {
//If level is not OFF then print the stack trace.
if(jdbcPoolStatsProviderBootstrap.getEnabledValue(monitoringLevel)) {
if("LOW".equals(monitoringLevel)) {
lowLevelLog(stackTrace);
} else if("HIGH".equals(monitoringLevel)) {
highLevelLog(stackTrace);
}
}
}
}*/
/* private void lowLevelLog(StringBuffer stackTrace) {
stackTrace.append("\n curNumConnUsed = " + numConnUsed.getCurrent());
stackTrace.append("\n curNumConnFree = " + numConnFree.getCurrent());
stackTrace.append("\n numConnCreated = " + numConnCreated.getCount());
stackTrace.append("\n numConnDestroyed = " + numConnDestroyed.getCount());
}
private void highLevelLog(StringBuffer stackTrace) {
lowLevelLog(stackTrace);
stackTrace.append("\n numConnFailedValidation = " + numConnFailedValidation.getCount());
stackTrace.append("\n numConnTimedOut = " + numConnTimedOut.getCount());
stackTrace.append("\n numConnAcquired = " + numConnAcquired.getCount());
stackTrace.append("\n numConnReleased = " + numConnReleased.getCount());
//TODO V3 : enabling other counters.
stackTrace.append("\n currConnectionRequestWait = " + currConnectionRequestWait);
stackTrace.append("\n minConnectionRequestWait = " + minConnectionRequestWait);
stackTrace.append("\n maxConnectionRequestWait = " + maxConnectionRequestWait);
stackTrace.append("\n totalConnectionRequestWait = " + totalConnectionRequestWait);
stackTrace.append("\n numConnSuccessfullyMatched = " + this.numConnSuccessfullyMatched);
stackTrace.append("\n numConnNotSuccessfullyMatched = " + numConnNotSuccessfullyMatched);
stackTrace.append("\n numPotentialConnLeak = " + numPotentialConnLeak.getCount());
}
*/
@ManagedAttribute(id="numpotentialconnleak")
public CountStatistic getNumPotentialConnLeakCount() {
return numPotentialConnLeak;
}
@ManagedAttribute(id="numconnfailedvalidation")
public CountStatistic getNumConnFailedValidation() {
return numConnFailedValidation;
}
@ManagedAttribute(id="numconntimedout")
public CountStatistic getNumConnTimedOut() {
return numConnTimedOut;
}
@ManagedAttribute(id="numconnused")
public RangeStatistic getNumConnUsed() {
return numConnUsed;
}
@ManagedAttribute(id="numconnfree")
public RangeStatistic getNumConnFree() {
return numConnFree;
}
@ManagedAttribute(id="connrequestwaittime")
public RangeStatistic getConnRequestWaitTime() {
return connRequestWaitTime;
}
@ManagedAttribute(id="numconndestroyed")
public CountStatistic getNumConnDestroyed() {
return numConnDestroyed;
}
@ManagedAttribute(id="numconnacquired")
public CountStatistic getNumConnAcquired() {
return numConnAcquired;
}
@ManagedAttribute(id="numconncreated")
public CountStatistic getNumConnCreated() {
return numConnCreated;
}
@ManagedAttribute(id="numconnreleased")
public CountStatistic getNumConnReleased() {
return numConnReleased;
}
@ManagedAttribute(id="numconnsuccessfullymatched")
public CountStatistic getNumConnSuccessfullyMatched() {
return numConnSuccessfullyMatched;
}
@ManagedAttribute(id="numconnnotsuccessfullymatched")
public CountStatistic getNumConnNotSuccessfullyMatched() {
return numConnNotSuccessfullyMatched;
}
@ManagedAttribute(id="averageconnwaittime")
public CountStatistic getAverageConnWaitTime() {
//Time taken by all connection requests divided by total number of
//connections acquired in the sampling period.
long averageWaitTime = 0;
if (numConnAcquired.getCount() != 0) {
averageWaitTime = totalConnRequestWaitTime.getCount()/
numConnAcquired.getCount();
} else {
averageWaitTime = 0;
}
averageConnWaitTime.setCount(averageWaitTime);
return averageConnWaitTime;
}
@ManagedAttribute(id="waitqueuelength")
public CountStatistic getWaitQueueLength() {
return waitQueueLength;
}
}