internal void CreateUninitializedItem (string id, int timeout)
{
StateServerItem item = new StateServerItem (timeout);
item.Action = SessionStateActions.InitializeItem;
LockableStateServerItem cacheItem = new LockableStateServerItem (item);
Insert (id, cacheItem);
}
internal void ReleaseItemExclusive(string id, object lockId)
{
LockableStateServerItem item = Retrieve(id);
if (item == null || item.item.LockId != (Int32)lockId)
{
return;
}
try
{
item.rwlock.AcquireWriterLock(lockAcquireTimeout);
item.item.Locked = false;
}
catch
{
throw;
}
finally
{
if (item.rwlock.IsWriterLockHeld)
{
item.rwlock.ReleaseWriterLock();
}
}
}
internal StateServerItem GetItem(string id,
out bool locked,
out TimeSpan lockAge,
out object lockId,
out SessionStateActions actions,
bool exclusive)
{
locked = false;
lockAge = TimeSpan.MinValue;
lockId = Int32.MinValue;
actions = SessionStateActions.None;
LockableStateServerItem item = Retrieve(id);
if (item == null || item.item.IsAbandoned())
{
return(null);
}
try
{
item.rwlock.AcquireReaderLock(lockAcquireTimeout);
if (item.item.Locked)
{
locked = true;
lockAge = DateTime.UtcNow.Subtract(item.item.LockedTime);
lockId = item.item.LockId;
return(null);
}
item.rwlock.ReleaseReaderLock();
if (exclusive)
{
item.rwlock.AcquireWriterLock(lockAcquireTimeout);
item.item.Locked = true;
item.item.LockedTime = DateTime.UtcNow;
item.item.LockId++;
lockId = item.item.LockId;
}
}
catch
{
throw;
}
finally
{
if (item.rwlock.IsReaderLockHeld)
{
item.rwlock.ReleaseReaderLock();
}
if (item.rwlock.IsWriterLockHeld)
{
item.rwlock.ReleaseWriterLock();
}
}
actions = item.item.Action;
return(item.item);
}
internal void CreateUninitializedItem(string id, int timeout)
{
StateServerItem item = new StateServerItem(timeout);
item.Action = SessionStateActions.InitializeItem;
LockableStateServerItem cacheItem = new LockableStateServerItem(item);
Insert(id, cacheItem);
}
internal void ResetItemTimeout(string id)
{
LockableStateServerItem item = Retrieve(id);
if (item == null)
{
return;
}
item.item.Touch();
}
internal void SetAndReleaseItemExclusive(string id, byte [] collection_data, byte [] sobjs_data,
object lockId, int timeout, bool newItem)
{
Console.WriteLine("RemoteStateServer.SetAndReleaseItemExclusive");
Console.WriteLine("\tid == {0}", id);
LockableStateServerItem item = Retrieve(id);
bool fresh = false;
if (newItem || item == null)
{
Console.WriteLine("\tnew item");
item = new LockableStateServerItem(new StateServerItem(collection_data, sobjs_data, timeout));
item.item.LockId = (Int32)lockId;
fresh = true;
}
else
{
if (item.item.LockId != (Int32)lockId)
{
Console.WriteLine("\tLockId mismatch ({0} != {1})", item.item.LockId, lockId);
return;
}
Console.WriteLine("\tremoving from cache");
Remove(id, lockId);
}
try {
Console.WriteLine("\tacquiring writer lock");
item.rwlock.AcquireWriterLock(lockAcquireTimeout);
item.item.Locked = false;
if (!fresh)
{
Console.WriteLine("\tnot fresh = updating data");
item.item.CollectionData = collection_data;
item.item.StaticObjectsData = sobjs_data;
}
Console.WriteLine("\tInserting in cache");
Insert(id, item);
} catch {
throw;
} finally {
if (item.rwlock.IsWriterLockHeld)
{
Console.WriteLine("\treleasing writer lock [finally]");
item.rwlock.ReleaseWriterLock();
}
}
}
internal void SetAndReleaseItemExclusive(string id, byte [] collection_data, byte [] sobjs_data,
object lockId, int timeout, bool newItem)
{
LockableStateServerItem item = Retrieve(id);
bool fresh = false;
if (newItem || item == null)
{
item = new LockableStateServerItem(new StateServerItem(collection_data, sobjs_data, timeout));
item.item.LockId = (Int32)lockId;
fresh = true;
}
else
{
if (item.item.LockId != (Int32)lockId)
{
return;
}
Remove(id, lockId);
}
try
{
item.rwlock.AcquireWriterLock(lockAcquireTimeout);
item.item.Locked = false;
if (!fresh)
{
item.item.CollectionData = collection_data;
item.item.StaticObjectsData = sobjs_data;
}
Insert(id, item);
}
catch
{
throw;
}
finally
{
if (item.rwlock.IsWriterLockHeld)
{
item.rwlock.ReleaseWriterLock();
}
}
}
void Insert (string id, LockableStateServerItem item)
{
cache.Insert (id, item, null, Cache.NoAbsoluteExpiration, new TimeSpan (0, item.item.Timeout, 0));
}
internal void SetAndReleaseItemExclusive (string id, byte [] collection_data, byte [] sobjs_data,
object lockId, int timeout, bool newItem)
{
LockableStateServerItem item = Retrieve (id);
bool fresh = false;
if (newItem || item == null) {
item = new LockableStateServerItem (new StateServerItem (collection_data, sobjs_data, timeout));
item.item.LockId = (Int32)lockId;
fresh = true;
} else {
if (item.item.LockId != (Int32)lockId)
return;
Remove (id, lockId);
}
try {
item.rwlock.AcquireWriterLock (lockAcquireTimeout);
item.item.Locked = false;
if (!fresh) {
item.item.CollectionData = collection_data;
item.item.StaticObjectsData = sobjs_data;
}
Insert (id, item);
} catch {
throw;
} finally {
if (item.rwlock.IsWriterLockHeld)
item.rwlock.ReleaseWriterLock ();
}
}
void Insert(string id, LockableStateServerItem item)
{
cache.Insert(id, item, null, Cache.NoAbsoluteExpiration, new TimeSpan(0, item.item.Timeout, 0));
}
internal void SetAndReleaseItemExclusive (string id, byte [] collection_data, byte [] sobjs_data,
object lockId, int timeout, bool newItem)
{
Console.WriteLine ("RemoteStateServer.SetAndReleaseItemExclusive");
Console.WriteLine ("\tid == {0}", id);
LockableStateServerItem item = Retrieve (id);
bool fresh = false;
if (newItem || item == null) {
Console.WriteLine ("\tnew item");
item = new LockableStateServerItem (new StateServerItem (collection_data, sobjs_data, timeout));
item.item.LockId = (Int32)lockId;
fresh = true;
} else {
if (item.item.LockId != (Int32)lockId) {
Console.WriteLine ("\tLockId mismatch ({0} != {1})", item.item.LockId, lockId);
return;
}
Console.WriteLine ("\tremoving from cache");
Remove (id, lockId);
}
try {
Console.WriteLine ("\tacquiring writer lock");
item.rwlock.AcquireWriterLock (lockAcquireTimeout);
item.item.Locked = false;
if (!fresh) {
Console.WriteLine ("\tnot fresh = updating data");
item.item.CollectionData = collection_data;
item.item.StaticObjectsData = sobjs_data;
}
Console.WriteLine ("\tInserting in cache");
Insert (id, item);
} catch {
throw;
} finally {
if (item.rwlock.IsWriterLockHeld) {
Console.WriteLine ("\treleasing writer lock [finally]");
item.rwlock.ReleaseWriterLock ();
}
}
}
internal StateServerItem GetItem(string id,
out bool locked,
out TimeSpan lockAge,
out object lockId,
out SessionStateActions actions,
bool exclusive)
{
Console.WriteLine("RemoteStateServer.GetItem");
Console.WriteLine("\tid == {0}", id);
locked = false;
lockAge = TimeSpan.MinValue;
lockId = Int32.MinValue;
actions = SessionStateActions.None;
LockableStateServerItem item = Retrieve(id);
if (item == null || item.item.IsAbandoned())
{
Console.WriteLine("\tNo item for that id (abandoned == {0})", item != null ? item.item.IsAbandoned() : false);
return(null);
}
try {
Console.WriteLine("\tacquiring reader lock");
item.rwlock.AcquireReaderLock(lockAcquireTimeout);
if (item.item.Locked)
{
Console.WriteLine("\titem is locked");
locked = true;
lockAge = DateTime.UtcNow.Subtract(item.item.LockedTime);
lockId = item.item.LockId;
return(null);
}
Console.WriteLine("\teleasing reader lock");
item.rwlock.ReleaseReaderLock();
if (exclusive)
{
Console.WriteLine("\tacquiring writer lock");
item.rwlock.AcquireWriterLock(lockAcquireTimeout);
Console.WriteLine("\tlocking the item");
item.item.Locked = true;
item.item.LockedTime = DateTime.UtcNow;
item.item.LockId++;
Console.WriteLine("\tnew lock id == {0}", item.item.LockId);
lockId = item.item.LockId;
}
} catch {
throw;
} finally {
if (item.rwlock.IsReaderLockHeld)
{
Console.WriteLine("\treleasing reader lock [finally]");
item.rwlock.ReleaseReaderLock();
}
if (item.rwlock.IsWriterLockHeld)
{
Console.WriteLine("\treleasing writer lock [finally]");
item.rwlock.ReleaseWriterLock();
}
}
Console.WriteLine("\treturning an item");
actions = item.item.Action;
return(item.item);
}
