com.gemstone.gemfire.internal.cache.ha

Class Bug36853EventsExpiryDUnitTest

java.lang.Object

junit.framework.Assert

junit.framework.TestCase

dunit.DistributedTestCase

com.gemstone.gemfire.cache30.CacheTestCase

com.gemstone.gemfire.internal.cache.ha.Bug36853EventsExpiryDUnitTest

All Implemented Interfaces:

Serializable, junit.framework.Test

public class Bug36853EventsExpiryDUnitTest
extends CacheTestCase

This is a bug test for 36853 (Expiry logic in HA is used to expire early data that a secondary picks up that is not in the primary. But it is also possible that it would cause data that is in the primary queue to be expired. And this can cause a data loss. This issue is mostly related to Expiry mechanism and not HA, but it affects HA functionality). This test has a cache-client connected to one cache-server. The expiry-time of events in the queue for the client at the server is set low and dispatcher is set for delayed start. This will make some of the events in the queue expire before dispatcher can start picking them up for delivery to the client.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class dunit.DistributedTestCase

DistributedTestCase.ExpectedException, DistributedTestCase.WaitCriterion, DistributedTestCase.WaitCriterion2

Field Summary

Fields

Modifier and Type	Field and Description
protected static com.gemstone.gemfire.cache.Cache	cache The cache instance for test cases
protected static boolean	proceedForValidation Boolean to indicate the client to proceed for validation
protected static int	putsRecievedByClient Counter to indicate number of puts recieved by client

Fields inherited from class dunit.DistributedTestCase

logPerTest, reconnect, system, testName

Constructor Summary

Constructors

Constructor and Description
Bug36853EventsExpiryDUnitTest(String name) Constructor

Method Summary

Modifier and Type	Method and Description
static void	closeCache() Closes the cache
static void	createClientCache(String hostName, Integer port) Creates the client cache
static Integer	createServerCache() Creates cache and starts the bridge-server
static void	generateEvents() First generates some events, then waits for the time equal to that of delayed start of the dispatcher and then does put on the last key for few iterations.
void	setUp() Sets up the cache-server and client for the test
void	tearDown2() Closes the caches on clients and servers
void	testEventsExpiryBug() First generates some events, then waits for the time equal to that of delayed start of the dispatcher and then does put on the last key for few iterations.
static void	validateEventCountAtClient() Waits for the listener to receive all events and validates that no exception occured in client

Methods inherited from class com.gemstone.gemfire.cache30.CacheTestCase

addExceptionTag1, basicGetCache, beginCacheXml, cleanDiskDirs, closeAllCache, createLonerCache, createMcastCache, createMcastCache, createRegion, createRegion, createRootRegion, createRootRegion, disconnectFromDS, finishCacheXml, finishCacheXml, getCache, getCache, getCache, getCache, getClientCache, getDiskDirs, getGemfireCache, getInternalRegionArguments, getRootRegion, getRootRegion, hasCache, remoteTearDown, removeExceptionTag1, sendSerialMessageToAll, sendUnorderedMessageToAll

Methods inherited from class dunit.DistributedTestCase

addExpectedException, addExpectedException, addHydraProperties, attachDebugger, checkBBFlag, cleanupAllVms, clearBBFlag, crashDistributedSystem, crashDistributedSystem, createLogWriter, disconnectAllFromDS, dumpAllStacks, dumpMyThreads, dumpStack, dumpStack, dumpStack, dumpStackTrace, fail, getAllDistributedSystemProperties, getDistributedSystemProperties, getDUnitLocatorAddress, getDUnitLocatorPort, getDUnitLocatorString, getDUnitLogLevel, getIPLiteral, getLogWriter, getLonerSystem, getMcastSystem, getMcastSystem, getRepeatTimeoutMs, getServerHostName, getSystem, getSystem, getTestClass, getTestName, getUniqueName, getVMCount, incBBFlag, invokeInEveryVM, invokeInEveryVM, invokeInEveryVM, invokeInEveryVM, invokeInEveryVMRepeatingIfNecessary, invokeInLocator, invokeRepeatingIfNecessary, isConnectedToDS, join, noteTiming, pause, pause, perVMSetUp, realTearDown, setDiskStoreForGateway, setSystem, setTestName, staticPause, tearDown, unregisterAllDataSerializersFromAllVms, unregisterDataSerializerInThisVM, unregisterInstantiatorsInThisVM, waitForBBFlag, waitForCriterion, waitMutex

Methods inherited from class junit.framework.TestCase

assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertFalse, assertFalse, assertNotNull, assertNotNull, assertNotSame, assertNotSame, assertNull, assertNull, assertSame, assertSame, assertTrue, assertTrue, countTestCases, createResult, fail, fail, failNotEquals, failNotSame, failSame, format, getName, run, run, runBare, runTest, setName, toString

Methods inherited from class java.lang.Object

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

Field Detail

cache

protected static com.gemstone.gemfire.cache.Cache cache

The cache instance for test cases

proceedForValidation

protected static volatile boolean proceedForValidation

Boolean to indicate the client to proceed for validation

putsRecievedByClient

protected static volatile int putsRecievedByClient

Counter to indicate number of puts recieved by client

Constructor Detail

Bug36853EventsExpiryDUnitTest

public Bug36853EventsExpiryDUnitTest(String name)

Constructor

Parameters:

name -

Method Detail

setUp

public void setUp()
           throws Exception

Sets up the cache-server and client for the test

Overrides:

setUp in class DistributedTestCase

Throws:

Exception - - thrown in any problem occurs in setUp

createServerCache

public static Integer createServerCache()
                                 throws Exception

Creates cache and starts the bridge-server

Throws:

thrown - in any problem occurs in creating and starting cache-server

Exception

createClientCache

public static void createClientCache(String hostName,
                                     Integer port)
                              throws Exception

Creates the client cache

Parameters:

hostName - the name of the server's machine

port - - bridgeserver port

Throws:

Exception - - thrown if any problem occurs in setting up the client

generateEvents

public static void generateEvents()
                           throws Exception

First generates some events, then waits for the time equal to that of delayed start of the dispatcher and then does put on the last key for few iterations. The idea is to let the events added, before waiting, to expire before the dispatcher to pick them up and then do a put on a LAST_KEY couple of times so that atleast one of these is dispatched to client and when client recieves this in the listener, the test is notified to proceed for validation.

Throws:

Exception - - thrown if any problem occurs in put operation

testEventsExpiryBug

public void testEventsExpiryBug()
                         throws Exception

First generates some events, then waits for the time equal to that of delayed start of the dispatcher and then does put on the last key for few iterations. Whenever the client the create corresponding to the LAST_KEY in the listener, the test is notified to proceed for validation. Then, it is validated that all the events that were added prior to the LAST_KEY are dispatched to the client. Due to the bug#36853, those events will expire and validation will fail.

Throws:

Exception - - thrown if any exception occurs in test

validateEventCountAtClient

public static void validateEventCountAtClient()
                                       throws Exception

Waits for the listener to receive all events and validates that no exception occured in client

Throws:

Exception

closeCache

public static void closeCache()

Closes the cache

tearDown2

public void tearDown2()
               throws Exception

Closes the caches on clients and servers

Overrides:

tearDown2 in class CacheTestCase

Throws:

Exception - - thrown if any problem occurs in closing client and server caches.