private int WhichNode(CachedObject obj)
{
return(WhichNode(obj.PrimaryKey));
}
/// <summary>
/// FeedMany is non transactional but it does not lock the cache. To be used for massive feeds
/// Can feed with business objects (they will be packed to CachedObject) or directly with CachedObject
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="items"></param>
/// <param name="excludeFromEviction"></param>
/// <param name="packetSize"></param>
public void FeedMany <T>(IEnumerable <T> items, bool excludeFromEviction, int packetSize)
{
if (items == null)
{
throw new ArgumentNullException(nameof(items));
}
// Lazy type registration
var itemType = typeof(T);
ClientSideTypeDescription description = null;
var needPack = itemType != typeof(CachedObject);
string typeName = null;
var sessionId = Guid.NewGuid().ToString();
if (needPack)
{
description = RegisterTypeIfNeeded(itemType);
typeName = description.FullTypeName;
}
// initialize one request per node
var requests = new PutRequest[CacheClients.Count];
// Parallelize both nodes and requests (multiple requests for the same node are executed in parallel if multiple connections are available in the pool)
var tasks = new List <Task>();
foreach (var item in items)
{
if (typeName == null)
{
typeName = (item as CachedObject)?.FullTypeName;
}
var packedItem = needPack ? CachedObject.Pack(item, description) : item as CachedObject;
var node = WhichNode(packedItem);
if (requests[node] == null)
{
requests[node] = new PutRequest(typeName)
{
ExcludeFromEviction = excludeFromEviction,
SessionId = sessionId
}
}
;
var request = requests[node];
request.Items.Add(packedItem);
if (request.Items.Count == packetSize)
{
var task = Task.Factory.StartNew(re =>
{
var response =
CacheClients[node].Channel.SendRequest((PutRequest)re);
if (response is ExceptionResponse exResponse)
{
throw new CacheException(
"Error while writing an object to the cache",
exResponse.Message, exResponse.CallStack);
}
}, request);
tasks.Add(task);
requests[node] = new PutRequest(typeName)
{
ExcludeFromEviction = excludeFromEviction,
SessionId = sessionId
};
}
}
//send the last packet left for each node
for (var node = 0; node < CacheClients.Count; node++)
{
var request = requests[node];
if (request != null)
{
request.EndOfSession = true;
var n = node;
var task = Task.Factory.StartNew(re =>
{
var response = CacheClients[n].Channel.SendRequest((PutRequest)re);
if (response is ExceptionResponse exResponse)
{
throw new CacheException(
"Error while writing an object to the cache",
exResponse.Message, exResponse.CallStack);
}
}, request);
tasks.Add(task);
}
}
try
{
Task.WaitAll(tasks.ToArray());
Dbg.Trace($"{tasks.Count} tasks finished");
}
catch (AggregateException e)
{
if (e.InnerException != null)
{
throw e.InnerException;
}
}
}
public void FeedMany <T>(IEnumerable <T> items, bool excludeFromEviction, int packetSize)
{
if (items == null)
{
throw new ArgumentNullException(nameof(items));
}
var itemType = typeof(T);
ClientSideTypeDescription description = null;
var needPack = itemType != typeof(CachedObject);
string typeName = null;
var sessionId = Guid.NewGuid().ToString();
if (needPack)
{
description = RegisterTypeIfNeeded(itemType);
typeName = description.FullTypeName;
}
using (var enumerator = items.GetEnumerator())
{
var endLoop = false;
while (!endLoop)
{
var packet = new CachedObject[packetSize];
var toPack = new T[packetSize];
var count = 0;
for (var i = 0; i < packetSize; i++)
{
if (enumerator.MoveNext())
{
var item = enumerator.Current;
toPack[i] = item;
count++;
}
else
{
endLoop = true;
break;
}
}
Parallel.For(0, count, new ParallelOptions {
MaxDegreeOfParallelism = 10
}, (i, loopState) =>
{
var item = toPack[i];
var packedItem = needPack ? CachedObject.Pack(item, description) : item as CachedObject;
if (typeName == null)
{
typeName = packedItem?.FullTypeName;
}
packet[i] = packedItem;
}
);
if (typeName != null) // null only for empty collection
{
var request = new PutRequest(typeName)
{
ExcludeFromEviction = excludeFromEviction,
SessionId = sessionId,
EndOfSession = endLoop
};
foreach (var cachedObject in packet)
{
if (cachedObject != null)
{
request.Items.Add(cachedObject);
}
}
var response = Channel.SendRequest(request);
if (response is ExceptionResponse exResponse)
{
throw new CacheException("Error while writing an object to the cache", exResponse.Message,
exResponse.CallStack);
}
}
}
}
}
