com.sun.jts.CosTransactions.AdminUtil Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.jts.CosTransactions;
import java.util.*;
import org.omg.CosTransactions.*;
/**
* AdminUtil - Utility class for monitoring and administering jts.
*
* This class is used by admin utilities for performing monitoring and
* administration.
* @author Ajay Kumar
* @version 1.0
*/
public class AdminUtil
{
//freezing functionality
/**
* freezeAll
*
* Freeze all transactional activity.
*
* Part of freezing functions that will be used to achive a
* transactional quiet period before taking any action or collecting
* any statistics. This call returns when all the activities are frozen.
* All the states would be allowed to complete before freezing on. For
* example a transaction in preparing state would be allowed to transition
* to next state - the prepared state.
*
*/
public static void freezeAll()
{
TransactionState.freezeLock.acquireWriteLock();
}
/**
* unfreezeAll
*
* Unfreeze all transactional activity frozen by a freezeAll call.
*
* Part of freezing functions that will be used to achive a
* transactional quiet period before taking any action or collecting
* any statistics. This call returns almost immediately.
*
*/
public static void unfreezeAll()
{
TransactionState.freezeLock.releaseWriteLock();
}
/**
* isFrozenAll
*
* Get the current state.
*
* Part of freezing functions that will be used to achive a
* transactional quiet period before taking any action or collecting
* any statistics. This call returns almost immediately.
*
*/
public static boolean isFrozenAll()
{
return TransactionState.freezeLock.isWriteLocked();
}
/* For future use
*
public static void freeze(Control ctrl)
{
}
*/
/* For future use.
*
public static void unfreeze(Control ctrl)
{
}
*/
//Sampling control
/**
* startSampling
*
* Start the sampling window. The sample window determines the duration
* in which the data is collected. Start and stop calls demarcate the
* the window. The sampling data could be number of transactions committed
* ,rolledback etc and transient data like pending etc. It also resets
* various counters.
*
* @see stopSampling
*/
public static void startSampling()
{
if(!bSampling){
try
{
statisticsLock.acquireWriteLock();
lSampleEndTime = 0 ;
lSampleStartTime = System.currentTimeMillis();
iCommits = 0;
iAborts = 0;
iPending = 0;
iRecCommits = 0;
iRecAborts = 0;
//iImmigerent = 0;
//iEmmigerent = 0;
Iterator iter = getAllTransactions().iterator();
while ( iter.hasNext() )
{
CoordinatorImpl coord = (CoordinatorImpl)iter.next();
if ( coord.get_status() ==
org.omg.CosTransactions.Status.StatusPrepared )
iPending++;
}
bSampling = true;
}
finally
{
statisticsLock.releaseWriteLock();
}
}
}
/**
* stopSampling
*
* Stop sampling the statitics values. This is used to indicate end of
* sampling window.
*
* @see startSampling
*
*/
public static void stopSampling()
{
try
{
statisticsLock.acquireWriteLock();
lSampleEndTime = System.currentTimeMillis();
bSampling = false;
}
finally
{
statisticsLock.releaseWriteLock();
}
}
//data collection
/**
* Increment the count of committed transactions.
*/
static void incrementCommitedTransactionCount()
{
try
{
statisticsLock.acquireReadLock();
synchronized ( lkCommits )
{
iCommits++;
}
}
finally
{
statisticsLock.releaseReadLock();
}
}
/**
* Increment the count of transactions that were rolled back.
*
*/
static void incrementAbortedTransactionCount()
{
try
{
statisticsLock.acquireReadLock();
synchronized ( lkAborts )
{
iAborts++;
}
}
finally
{
statisticsLock.releaseReadLock();
}
}
/**
* Increment the count of transactions that were rolled back and ne'er went through prepare phase.
*
*/
static void incrementUnpreparedAbortedTransactionCount()
{
try
{
statisticsLock.acquireReadLock();
synchronized ( lkUAborts )
{
iUAborts++;
}
}
finally
{
statisticsLock.releaseReadLock();
}
}
/**
* Increment the count of pending transactions
* - i.e. the transactions entering the prepared state.
*
*/
static void incrementPendingTransactionCount()
{
try
{
statisticsLock.acquireReadLock();
synchronized ( lkPending )
{
iPending++;
}
}
finally
{
statisticsLock.releaseReadLock();
}
}
/**
* Increments the number of transactions that were commited as part of
* the recovery process.
*/
public static void incrementRecoveryCommitedTransactionCount()
{
try
{
statisticsLock.acquireReadLock();
synchronized ( lkRecCommits )
{
iRecCommits++;
}
}
finally
{
statisticsLock.releaseReadLock();
}
}
/**
* Increments the number of transactions that were rolled back as part
* of the recovery process.
*/
public static void incrementRecoveryAbortedTransactionCount()
{
try
{
statisticsLock.acquireReadLock();
synchronized ( lkRecAborts )
{
iRecAborts++;
}
}
finally
{
statisticsLock.releaseReadLock();
}
}
/* For future use
*
public static void incrementImmigerentTransactionCount()
{
try
{
statisticsLock.acquireReadLock();
synchronized ( lkImmigerent )
{
iImmigerent++;
}
}
finally
{
statisticsLock.releaseReadLock();
}
}
*/
/* For future use
*
public static void incrementEmmigerentTransactionCount()
{
try
{
statisticsLock.acquireReadLock();
synchronized ( lkEmmigerent )
{
iEmmigerent++;
}
}
finally
{
statisticsLock.releaseReadLock();
}
}
*/
//gathering statistics
/**
* Return the committed transactions count.
*
*/
public static long getCommitedTransactionCount()
{
return iCommits;
}
/**
* Return the count of rolledback transactions.
*
*/
public static long getAbortedTransactionCount()
{
return iAborts;
}
/**
* Return the number of transactions that are active currently.
*
*/
public static long getActiveTransactionCount()
{
return RecoveryManager.getCoordsByGlobalTID().size()
- getPendingTransactionCount();
}
/**
* Return the count of transactions that are prepared - but not completed.
* This includes the total transactions that ever entered into prepared state
* minus ones which got committed, rolledback, taking care of ones that were
* rolledback without entering prepared state.
*
*/
public static long getPendingTransactionCount()
{
return iPending-iAborts-iCommits+iUAborts;
}
/**
* Return the count of transactions that were commited as part of the
* recovery process.
*/
public static long getRecoveryCommitedTransactionCount()
{
return iRecCommits;
}
/**
* Return the number of transactions that were rolled back as part of the
* recovery process.
*/
public static long getRecoveryAbortedTransactionCount()
{
return iRecAborts;
}
/**
*
public static long getImmigerentTransactionCount()
{
return iImmigerent;
}
*/
/**
*
public static long getEmmigerentTransactionCount()
{
return iEmmigerent;
}
*/
/**
* Returns the time in milliseconds, since the begining of time, when the
* sampling window was started.
*/
public static long getSamplingStartTime()
{
return lSampleStartTime;
}
/**
* Returns the time in millisecond , since the begining of time, when the
* sampling window was closed.
*/
public static long getSamplingEndTime()
{
return lSampleEndTime;
}
/**
* Returns the duration for which the last sampling window was open, in milliseconds.
* If the sampling window is still open, then the running duration is returned.
*/
public static long getSamplingDuration()
{
return ( lSampleEndTime == 0 && lSampleStartTime != 0 )
? System.currentTimeMillis() - lSampleStartTime
: lSampleEndTime - lSampleStartTime;
}
// Enumerating...
/**
* Returns the collection of existing coordinators.
*
*/
public static Collection/**/ getAllTransactions()
{
return RecoveryManager.getCoordsByGlobalTID().values();
}
/**
* Returned enumeration of globaltids of existing transactions.
*
*/
public static Enumeration/**/ getAllTIDs()
{
return RecoveryManager.getCoordsByGlobalTID().keys();
}
private static RWLock statisticsLock = new RWLock() ;
private static long lSampleStartTime = 0 ;
private static long lSampleEndTime = 0 ;
static boolean bSampling = false ;
private static int iCommits = 0;
private static int iAborts = 0;
private static int iUAborts=0;
private static int iPending = 0;
static int iRecCommits = 0;
static int iRecAborts = 0;
/*
* for future use
*
static int iImmigerent = 0;
static int iEmmigerent = 0;
*/
private static Object lkCommits = new Object();
private static Object lkAborts = new Object();
private static Object lkUAborts = new Object();
private static Object lkPending = new Object();
static Object lkRecCommits = new Object();
static Object lkRecAborts = new Object();
/*
* for future use
*
static Object lkImmigerent = new Object();
static Object lkEmmigerent = new Object();
*/
}
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