/// <summary>
/// Removes key and value pairs from the cache. The keys are specified as parameter.
/// Moreover it take a removal reason and a boolean specifying if a notification should
/// be raised.
/// </summary>
/// <param name="keys">keys of the entry.</param>
/// <param name="removalReason">reason for the removal.</param>
/// <param name="notify">boolean specifying to raise the event.</param>
/// <returns>list of removed keys</returns>
public override Hashtable Remove(object[] keys, ItemRemoveReason removalReason, bool notify, bool isUserOperation, OperationContext operationContext)
{
Hashtable table = new Hashtable();
EventContext eventContext = null;
EventId eventId = null;
OperationID opId = operationContext.OperatoinID;
for (int i = 0; i < keys.Length; i++)
{
try
{
operationContext.RemoveValueByField(OperationContextFieldName.EventContext);
if (notify)
{
//generate EventId
eventId = new EventId();
eventId.EventUniqueID = opId.OperationId;
eventId.OperationCounter = opId.OpCounter;
eventId.EventCounter = i;
eventContext = new EventContext();
eventContext.Add(EventContextFieldName.EventID, eventId);
operationContext.Add(OperationContextFieldName.EventContext, eventContext);
}
CacheEntry e = Remove(keys[i], removalReason, notify, null, LockAccessType.IGNORE_LOCK, operationContext);
if (e != null)
{
table[keys[i]] = e;
}
}
catch (StateTransferException e)
{
table[keys[i]] = e;
}
finally
{
operationContext.RemoveValueByField(OperationContextFieldName.EventContext);
}
}
if (_context.PerfStatsColl != null)
{
_context.PerfStatsColl.SetCacheSize(Size);
}
return table;
}
/// <summary>
/// Adds key and value pairs to the cache. If any of the specified keys
/// already exists in the cache; it is updated, otherwise a new item is
/// added to the cache.
/// </summary>
/// <param name="keys">keys of the entries.</param>
/// <param name="cacheEntry">the cache entries.</param>
/// <returns>returns keys that are added or updated successfully and their status.</returns>
public sealed override Hashtable Insert(object[] keys, CacheEntry[] cacheEntries, bool notify, OperationContext operationContext)
{
Hashtable table = new Hashtable();
EventContext eventContext = null;
EventId eventId = null;
OperationID opId = operationContext.OperatoinID;
for (int i = 0; i < keys.Length; i++)
{
try
{
operationContext.RemoveValueByField(OperationContextFieldName.EventContext);
if (notify)
{
//generate EventId
eventId = new EventId();
eventId.EventUniqueID = opId.OperationId;
eventId.OperationCounter = opId.OpCounter;
eventId.EventCounter = i;
eventContext = new EventContext();
eventContext.Add(EventContextFieldName.EventID, eventId);
operationContext.Add(OperationContextFieldName.EventContext, eventContext);
}
CacheInsResultWithEntry result = Insert(keys[i], cacheEntries[i], notify, null, LockAccessType.IGNORE_LOCK, operationContext);
table.Add(keys[i], result);
}
catch (Exception e)
{
table[keys[i]] = e;
}
finally
{
operationContext.RemoveValueByField(OperationContextFieldName.EventContext);
}
}
if (_context.PerfStatsColl != null)
{
_context.PerfStatsColl.SetCacheSize(Size);
}
return table;
}
/// <summary>
/// Retrieve the objects from the cache.
/// An array of keys is passed as parameter.
/// </summary>
/// <param name="keys">keys of the entries.</param>
/// <returns>key and entry pairs.</returns>
public sealed override Hashtable Get(object[] keys, OperationContext operationContext)
{
Hashtable entries = new Hashtable();
CacheEntry e = null;
for (int i = 0; i < keys.Length; i++)
{
try
{
if(operationContext != null)
{
operationContext.RemoveValueByField(OperationContextFieldName.EventContext);
OperationID opId = operationContext.OperatoinID;
//generate EventId
EventId eventId = EventId.CreateEventId(opId);
eventId.EventUniqueID = opId.OperationId;
eventId.OperationCounter = opId.OpCounter;
eventId.EventCounter = i;
EventContext eventContext = new EventContext();
eventContext.Add(EventContextFieldName.EventID, eventId);
operationContext.Add(OperationContextFieldName.EventContext, eventContext);
}
e = Get(keys[i], operationContext);
if (e != null)
{
entries[keys[i]] = e;
}
}
catch (StateTransferException se)
{
entries[keys[i]] = se;
}
}
return entries;
}
/// <summary>
/// Adds key and value pairs to the cache. Throws an exception or returns the
/// list of keys that failed to add in the cache.
/// </summary>
/// <param name="keys">keys of the entries.</param>
/// <param name="cacheEntries">the cache entries.</param>
/// <returns>List of keys that are added or that alredy exists in the cache and their status.</returns>
public sealed override Hashtable Add(object[] keys, CacheEntry[] cacheEntries, bool notify, OperationContext operationContext)
{
Hashtable table = new Hashtable();
EventContext eventContext = null;
EventId eventId = null;
OperationID opId = operationContext.OperatoinID;
for (int i = 0; i < keys.Length; i++)
{
try
{
operationContext.RemoveValueByField(OperationContextFieldName.EventContext);
if (notify)
{
//generate EventId
eventId = new EventId();
eventId.EventUniqueID = opId.OperationId;
eventId.OperationCounter = opId.OpCounter;
eventId.EventCounter = i;
eventContext = new EventContext();
eventContext.Add(EventContextFieldName.EventID, eventId);
operationContext.Add(OperationContextFieldName.EventContext, eventContext);
}
CacheAddResult result = Add(keys[i], cacheEntries[i], notify, operationContext);
table[keys[i]] = result;
}
catch (Exceptions.StateTransferException se)
{
table[keys[i]] = se;
}
catch (Exception inner)
{
table[keys[i]] = new OperationFailedException(inner.Message, inner);
}
finally
{
operationContext.RemoveValueByField(OperationContextFieldName.EventContext);
}
}
if (_context.PerfStatsColl != null)
{
_context.PerfStatsColl.SetCacheSize(Size);
}
return table;
}
private Hashtable ClusteredInsert(object[] keys, CacheEntry[] cacheEntries, bool notify, OperationContext operationContext)
{
Hashtable targetNodes = null;
Hashtable result = new Hashtable();
Hashtable tmpResult = null;
ArrayList totalKeys = new ArrayList(keys);
ArrayList totalEntries = new ArrayList(cacheEntries);
ArrayList keysToInsert = new ArrayList(keys);
Address targetNode = null;
object[] currentKeys = null;
CacheEntry[] currentValues = null;
Dictionary<object, CacheEntry> fullEntrySet = new Dictionary<object, CacheEntry>();
Hashtable totalAddedKeys = new Hashtable();
Hashtable totalInsertedKeys = new Hashtable();
Hashtable totalRemainingKeys = new Hashtable();
if (_internalCache == null) throw new InvalidOperationException();
do
{
targetNodes = GetTargetNodes(keysToInsert);
if (targetNodes != null && targetNodes.Count == 0)
{
foreach (object key in keysToInsert)
{
result[key] = new OperationFailedException("No target node available to accommodate the data.");
}
return result;
}
IDictionaryEnumerator ide = targetNodes.GetEnumerator();
Hashtable keyList = null;
//We select one node at a time for Add operation.
while (ide.MoveNext())
{
targetNode = ide.Key as Address;
keyList = (Hashtable) ide.Value;
if (targetNode != null && keyList != null)
{
currentKeys = new object[keyList.Count];
currentValues = new CacheEntry[keyList.Count];
int j = 0;
foreach (object key in keyList.Keys)
{
int index = totalKeys.IndexOf(key);
if (index != -1)
{
currentKeys[j] = totalKeys[index];
currentValues[j] = totalEntries[index] as CacheEntry;
if (!fullEntrySet.ContainsKey((string) totalKeys[index]))
fullEntrySet.Add((string) totalKeys[index], (CacheEntry) totalEntries[index]);
j++;
}
}
try
{
if (targetNode.Equals(Cluster.LocalAddress))
{
tmpResult = Local_Insert(currentKeys, currentValues, Cluster.LocalAddress, notify, operationContext);
}
else
{
tmpResult = Clustered_Insert(targetNode, currentKeys, currentValues,
operationContext);
}
}
catch (Runtime.Exceptions.SuspectedException se)
{
//we redo the operation
if (Context.NCacheLog.IsInfoEnabled)
Context.NCacheLog.Info("PartitionedServerCache.SafeAdd",
targetNode + " left while addition");
tmpResult = new Hashtable();
for (int i = 0; i < currentKeys.Length; i++)
{
tmpResult[currentKeys[i]] = new GeneralFailureException(se.Message, se);
}
}
catch (Runtime.Exceptions.TimeoutException te)
{
if (Context.NCacheLog.IsInfoEnabled)
Context.NCacheLog.Info("PartitionedServerCache.SafeAdd",
targetNode + " operation timed out");
tmpResult = new Hashtable();
for (int i = 0; i < currentKeys.Length; i++)
{
tmpResult[currentKeys[i]] = new GeneralFailureException(te.Message, te);
}
}
catch (BucketTransferredException ex)
{
tmpResult = new Hashtable();
for (int i = 0; i < currentKeys.Length; i++)
{
tmpResult[currentKeys[i]] = new OperationFailedException(ex.Message, ex);
}
}
if (tmpResult != null && tmpResult.Count > 0)
{
IDictionaryEnumerator ie = tmpResult.GetEnumerator();
while (ie.MoveNext())
{
if (ie.Value is StateTransferException)
{
totalRemainingKeys[ie.Key] = null;
}
else
{
if (ie.Value is Exception)
{
result[ie.Key] = ie.Value;
}
else if (ie.Value is CacheInsResultWithEntry)
{
CacheInsResultWithEntry res = ie.Value as CacheInsResultWithEntry;
switch (res.Result)
{
case CacheInsResult.Failure:
result[ie.Key] =
new OperationFailedException(
"Generic operation failure; not enough information is available.");
break;
case CacheInsResult.NeedsEviction:
result[ie.Key] =
new OperationFailedException(
"The cache is full and not enough items could be evicted.");
break;
case CacheInsResult.Success:
totalAddedKeys[ie.Key] = null;
break;
case CacheInsResult.SuccessOverwrite:
totalInsertedKeys[ie.Key] = ie.Value;
result[ie.Key] = ie.Value;
break;
}
}
}
}
}
}
}
keysToInsert = new ArrayList(totalRemainingKeys.Keys);
totalRemainingKeys.Clear();
} while (keysToInsert.Count > 0);
object generateQueryInfo = operationContext.GetValueByField(OperationContextFieldName.GenerateQueryInfo);
if (generateQueryInfo == null)
{
operationContext.Add(OperationContextFieldName.GenerateQueryInfo, true);
}
if (totalInsertedKeys.Count > 0)
{
IDictionaryEnumerator ide = totalInsertedKeys.GetEnumerator();
while (ide.MoveNext())
{
object key = ide.Key;
CacheInsResultWithEntry insResult = ide.Value as CacheInsResultWithEntry;
if (notify)
{
CacheEntry currentEntry = fullEntrySet[(string) ide.Key];
object value = insResult.Entry.Value;
if (value is CallbackEntry)
{
RaiseCustomUpdateCalbackNotifier(ide.Key, currentEntry, insResult.Entry, operationContext);
}
}
}
}
if (generateQueryInfo == null)
{
operationContext.RemoveValueByField(OperationContextFieldName.GenerateQueryInfo);
}
return result;
}
