public void TransactionExceedingTimeoutTest( )
{
var testCache = new TestCache( );
using (var scope = new TransactionScope(TransactionScopeOption.Required))
{
// Create a notification manager with a time out interval of 1 seconds.
var cacheManager = new TransactionEventNotificationManager(testCache, 0);
// Add an items to the cache while inside a transaction
testCache.AddItem("A");
cacheManager.EnlistTransaction(Transaction.Current);
testCache.AddItem("B");
cacheManager.EnlistTransaction(Transaction.Current);
testCache.AddItem("C");
cacheManager.EnlistTransaction(Transaction.Current);
scope.Complete( );
// As the transaction exceeded the timeout, its data will not
// be committed
}
Assert.IsFalse(testCache.Contains("A"));
Assert.IsFalse(testCache.Contains("B"));
Assert.IsFalse(testCache.Contains("C"));
}
public void EnlistRolledbackTransactionTest( )
{
var testCache = new TestCache( );
using (new TransactionScope(TransactionScopeOption.Required))
{
var cacheManager = new TransactionEventNotificationManager(testCache);
// Add some items to the cache while inside a transaction
testCache.AddItem("A");
cacheManager.EnlistTransaction(Transaction.Current);
testCache.AddItem("B");
cacheManager.EnlistTransaction(Transaction.Current);
testCache.AddItem("C");
cacheManager.EnlistTransaction(Transaction.Current);
// Roll back transaction
}
Assert.IsFalse(testCache.Contains("A"));
Assert.IsFalse(testCache.Contains("B"));
Assert.IsFalse(testCache.Contains("C"));
}
public void EnlistCommitTransactionTest( )
{
var testCache = new TestCache( );
using (var scope = new TransactionScope(TransactionScopeOption.Required))
{
var cacheManager = new TransactionEventNotificationManager(testCache);
// Add some items to the cache while inside a transaction
testCache.AddItem("A");
cacheManager.EnlistTransaction(Transaction.Current);
testCache.AddItem("B");
cacheManager.EnlistTransaction(Transaction.Current);
testCache.AddItem("C");
cacheManager.EnlistTransaction(Transaction.Current);
// Commit the transaction
scope.Complete( );
}
Assert.IsTrue(testCache.Contains("A"));
Assert.IsTrue(testCache.Contains("B"));
Assert.IsTrue(testCache.Contains("C"));
}
public void ClearTransactionEventNotifiersTest( )
{
var testCache = new TestCache( );
using (var scope = new TransactionScope(TransactionScopeOption.Required))
{
var cacheManager = new TransactionEventNotificationManager(testCache);
// Add some items to the cache while inside a transaction
testCache.AddItem("A");
cacheManager.EnlistTransaction(Transaction.Current);
testCache.AddItem("B");
cacheManager.EnlistTransaction(Transaction.Current);
testCache.AddItem("C");
cacheManager.EnlistTransaction(Transaction.Current);
// Clear the event notifiers
cacheManager.ClearTransactionEventNotifiers( );
// Commit the transaction
// as the. As the event notifiers have been removed
// the items will not be commited
scope.Complete( );
}
Assert.IsFalse(testCache.Contains("A"));
Assert.IsFalse(testCache.Contains("B"));
Assert.IsFalse(testCache.Contains("C"));
}
public void EnlistNullTransactionTest( )
{
var testCache = new TestCache( );
var cacheManager = new TransactionEventNotificationManager(testCache);
cacheManager.EnlistTransaction(null);
}
/// <summary>
/// Constructor that initializes both the internal cache and lru list.
/// </summary>
/// <remarks>
/// The cache is transaction aware. Any objects that are added or retrieved
/// from the cache during a transaction are removed if the transaction is rolled back.
/// If the cache is used to cache database objects consider making the cache transaction aware.
/// </remarks>
/// <param name="cacheName">
/// Name of the cache.
/// </param>
/// <param name="publicCache">
/// The cache being wrapped. This cannot be null.
/// </param>
/// <param name="privateCacheFactory">
/// A function to create a new cache instance. Used to create a new cache for each transaction.
/// This cannot be null.
/// </param>
/// <exception cref="ArgumentNullException">
/// No argument can be null.
/// </exception>
public TransactionAwareCache(string cacheName, ICache <TKey, TValue> publicCache, Func <string, ICache <TKey, TValue> > privateCacheFactory)
{
if (publicCache == null)
{
throw new ArgumentNullException(nameof(publicCache));
}
if (privateCacheFactory == null)
{
throw new ArgumentNullException(nameof(privateCacheFactory));
}
_cacheName = cacheName;
_publicCache = publicCache;
_privateCacheFactory = privateCacheFactory;
_privateCaches = new ConcurrentDictionary <string, ICache <TKey, TValue> >();
_transactionEventNotificationManager = new TransactionEventNotificationManager(this);
}
