private async Task <IIndexWorkflowQueue> GetReincarnatedWorkflowQueue(IIndexWorkflowQueue workflowQ)
{
string primaryKey = workflowQ.GetPrimaryKeyString();
IIndexWorkflowQueue reincarnatedQ = InsideRuntimeClient.Current.InternalGrainFactory.GetGrain <IIndexWorkflowQueue>(primaryKey);
IIndexWorkflowQueueHandler reincarnatedQHandler = InsideRuntimeClient.Current.InternalGrainFactory.GetGrain <IIndexWorkflowQueueHandler>(primaryKey);
await Task.WhenAll(reincarnatedQ.Initialize(workflowQ), reincarnatedQHandler.Initialize(workflowQ));
return(reincarnatedQ);
}
internal IndexWorkflowQueueHandlerBase(Type iGrainType, int queueSeqNum, SiloAddress silo, bool isDefinedAsFaultTolerantGrain, GrainReference parent)
{
_iGrainType = iGrainType;
_queueSeqNum = queueSeqNum;
_isDefinedAsFaultTolerantGrain = isDefinedAsFaultTolerantGrain;
_hasAnyTotalIndex = false;
__indexes = null;
__workflowQueue = null;
_silo = silo;
_parent = parent;
}
private IIndexWorkflowQueue InitIndexWorkflowQueue()
{
if (_parent.IsSystemTarget)
{
return(__workflowQueue = InsideRuntimeClient.Current.InternalGrainFactory.GetSystemTarget <IIndexWorkflowQueue>(IndexWorkflowQueueBase.CreateIndexWorkflowQueueGrainId(_iGrainType, _queueSeqNum), _silo));
}
else
{
return(__workflowQueue = InsideRuntimeClient.Current.InternalGrainFactory.GetGrain <IIndexWorkflowQueue>(IndexWorkflowQueueBase.CreateIndexWorkflowQueuePrimaryKey(_iGrainType, _queueSeqNum)));
}
}
internal IndexWorkflowQueueHandlerBase(SiloIndexManager siloIndexManager, Type grainInterfaceType, int queueSeqNum, SiloAddress silo,
bool isDefinedAsFaultTolerantGrain, Func <GrainReference> parentFunc)
{
_grainInterfaceType = grainInterfaceType;
_queueSeqNum = queueSeqNum;
_isDefinedAsFaultTolerantGrain = isDefinedAsFaultTolerantGrain;
_hasAnyTotalIndex = false;
__grainIndexes = null;
__workflowQueue = null;
_silo = silo;
_siloIndexManager = siloIndexManager;
_lazyParent = new Lazy <GrainReference>(parentFunc, true);
}
public Task Initialize(IIndexWorkflowQueue oldParentSystemTarget)
{
if (_base == null)
{
GrainReference oldParentSystemTargetRef = oldParentSystemTarget.AsWeaklyTypedReference();
string[] parts = oldParentSystemTargetRef.GetPrimaryKeyString().Split('-');
if (parts.Length != 2)
{
throw new Exception("The primary key for IndexWorkflowQueueSystemTarget should only contain a single special character '-', while it contains multiple. The primary key is '" + oldParentSystemTargetRef.GetPrimaryKeyString() + "'");
}
Type grainInterfaceType = TypeUtils.ResolveType(parts[0]);
int queueSequenceNumber = int.Parse(parts[1]);
GrainReference thisRef = this.AsWeaklyTypedReference();
_base = new IndexWorkflowQueueHandlerBase(grainInterfaceType, queueSequenceNumber, oldParentSystemTargetRef.SystemTargetSilo, true /*otherwise it shouldn't have reached here!*/, thisRef);
}
return TaskDone.Done;
}
public Task Initialize(IIndexWorkflowQueue oldParentGrainService)
{
if (_base == null)
{
GrainReference oldParentGrainServiceRef = oldParentGrainService.AsWeaklyTypedReference();
string[] parts = oldParentGrainServiceRef.GetPrimaryKeyString().Split('-');
if (parts.Length != 2)
{
throw new WorkflowIndexException("The primary key for IndexWorkflowQueueGrainService should only contain a single special character '-', while it contains multiple." +
" The primary key is '" + oldParentGrainServiceRef.GetPrimaryKeyString() + "'");
}
Type grainInterfaceType = this.SiloIndexManager.CachedTypeResolver.ResolveType(parts[0]);
int queueSequenceNumber = int.Parse(parts[1]);
_base = new IndexWorkflowQueueBase(this.SiloIndexManager, grainInterfaceType, queueSequenceNumber,
oldParentGrainServiceRef.GrainServiceSiloAddress, isDefinedAsFaultTolerantGrain: true,
parentFunc: () => this.AsWeaklyTypedReference());
}
return(Task.CompletedTask);
}
protected Task ApplyIndexUpdatesLazily(IDictionary <string, IMemberUpdate> updates,
IList <Type> iGrainTypes,
IIndexableGrain thisGrain,
Guid workflowID)
{
if (iGrainTypes.Count() == 1)
{
IIndexWorkflowQueue workflowQ = GetWorkflowQueue(iGrainTypes[0]);
return(workflowQ.AddToQueue(new IndexWorkflowRecord(workflowID, thisGrain, updates).AsImmutable()));
}
else
{
Task[] tasks = new Task[iGrainTypes.Count];
int i = 0;
foreach (Type iGrainType in iGrainTypes)
{
tasks[i++] = GetWorkflowQueue(iGrainType).AddToQueue(
new IndexWorkflowRecord(workflowID, thisGrain, updates).AsImmutable()
);
}
return(Task.WhenAll(tasks));
}
}
public Task Initialize(IIndexWorkflowQueue oldParentGrainService) => throw new NotSupportedException();
private IIndexWorkflowQueue InitIndexWorkflowQueue()
=> __workflowQueue = _lazyParent.Value.IsGrainService
? _siloIndexManager.GetGrainService <IIndexWorkflowQueue>(IndexWorkflowQueueBase.CreateIndexWorkflowQueueGrainReference(_siloIndexManager, _grainInterfaceType, _queueSeqNum, _silo))
: _siloIndexManager.GrainFactory.GetGrain <IIndexWorkflowQueue>(IndexWorkflowQueueBase.CreateIndexWorkflowQueuePrimaryKey(_grainInterfaceType, _queueSeqNum));
public Task Initialize(IIndexWorkflowQueue oldParentSystemTarget)
{
throw new NotSupportedException();
}
/// <summary>
/// Handles the remaining work-flows of a specific grain interface of the grain
/// </summary>
/// <param name="iGrainType">the grain interface type being indexed</param>
/// <param name="oldWorkflowQ">the previous work-flow queue responsible for handling the updates</param>
/// <returns>the actual list of work-flow record IDs that were available in this queue</returns>
private async Task <IEnumerable <Guid> > HandleRemainingWorkflows(Type iGrainType, IIndexWorkflowQueue oldWorkflowQ)
{
//keeps the reference to the reincarnated work-flow queue,
//if the original work-flow queue (system target) did not respond.
IIndexWorkflowQueue reincarnatedOldWorkflowQ = null;
//keeps the list of work-flow records from the old work-flow queue
Immutable <List <IndexWorkflowRecord> > remainingWorkflows;
//first, we remove the work-flow queue associated with iGrainType (i.e., oldWorkflowQ)
//so that another call to get the work-flow queue for iGrainType
//gets the new work-flow queue responsible for iGrainType (otherwise oldWorkflowQ is returned)
WorkflowQueues.Remove(iGrainType);
IIndexWorkflowQueue newWorkflowQ = GetWorkflowQueue(iGrainType);
//if the same work-flow queue is responsible we just check
//what work-flow records are still in process
if (newWorkflowQ.Equals(oldWorkflowQ))
{
remainingWorkflows = await oldWorkflowQ.GetRemainingWorkflowsIn(base.State.activeWorkflowsSet);
if (remainingWorkflows.Value != null && remainingWorkflows.Value.Count() > 0)
{
return(remainingWorkflows.Value.Select(w => w.WorkflowId));
}
}
else //the work-flow queue responsible for iGrainType has changed
{
try
{
//we try to contact the original oldWorkflowQ to
//get the list of remaining work-flow records
//in order to pass their responsibility to newWorkflowQ
remainingWorkflows = await oldWorkflowQ.GetRemainingWorkflowsIn(base.State.activeWorkflowsSet);
}
catch //the corresponding workflowQ is down, we should ask its reincarnated version
{
//if anything bad happened, it means that oldWorkflowQ is not reachable.
//Then we get our hands to reincarnatedOldWorkflowQ to get the list of remaining work-flow records
reincarnatedOldWorkflowQ = await GetReincarnatedWorkflowQueue(oldWorkflowQ);
remainingWorkflows = await reincarnatedOldWorkflowQ.GetRemainingWorkflowsIn(base.State.activeWorkflowsSet);
}
//if any work-flow is remaining unprocessed
if (remainingWorkflows.Value != null && remainingWorkflows.Value.Count() > 0)
{
//give the responsibility of handling the remaining
//work -flow records to the newWorkflowQ
await newWorkflowQ.AddAllToQueue(remainingWorkflows);
//check which was the target old work-flow queue that responded to our request
var targetOldWorkflowQueue = reincarnatedOldWorkflowQ != null ? reincarnatedOldWorkflowQ : oldWorkflowQ;
//it's good that we remove the work-flows from the queue,
//but we really don't have to wait for them
//worst-case, it will be processed again by the old-queue
targetOldWorkflowQueue.RemoveAllFromQueue(remainingWorkflows).Ignore();
return(remainingWorkflows.Value.Select(w => w.WorkflowId));
}
}
//if there are no remaining work-flow records, an empty Enumerable is returned
return(Enumerable.Empty <Guid>());
}
