GetEstimatedChangesCountAsync(ClientScopeInfo clientScopeInfo, SyncParameters parameters = default, DbConnection connection = default, DbTransaction transaction = default, CancellationToken cancellationToken = default, IProgress <ProgressArgs> progress = null)
{
var context = new SyncContext(Guid.NewGuid(), clientScopeInfo.Name);
if (parameters != null)
{
context.Parameters = parameters;
}
SyncSet schema;
ServerScopeInfo serverScopeInfo;
// Need the server scope
(context, serverScopeInfo) = await this.InternalGetServerScopeInfoAsync(context, clientScopeInfo.Setup, connection, transaction, cancellationToken, progress).ConfigureAwait(false);
schema = serverScopeInfo.Schema;
schema.EnsureSchema();
clientScopeInfo.Schema = schema;
clientScopeInfo.Setup = serverScopeInfo.Setup;
clientScopeInfo.Version = serverScopeInfo.Version;
// generate a message to send
var changesToSend = new HttpMessageSendChangesRequest(context, clientScopeInfo)
{
Changes = null,
IsLastBatch = true,
BatchIndex = 0,
BatchCount = 0
};
var serializer = this.SerializerFactory.GetSerializer <HttpMessageSendChangesRequest>();
var binaryData = await serializer.SerializeAsync(changesToSend);
// Raise progress for sending request and waiting server response
await this.InterceptAsync(new HttpGettingServerChangesRequestArgs(0, 0, context, this.GetServiceHost()), progress, cancellationToken).ConfigureAwait(false);
// response
var response = await this.httpRequestHandler.ProcessRequestAsync
(this.HttpClient, context, this.ServiceUri, binaryData, HttpStep.GetEstimatedChangesCount,
this.SerializerFactory, this.Converter, this.Options.BatchSize, this.SyncPolicy, cancellationToken, progress).ConfigureAwait(false);
HttpMessageSendChangesResponse summaryResponseContent = null;
using (var streamResponse = await response.Content.ReadAsStreamAsync().ConfigureAwait(false))
{
var responseSerializer = this.SerializerFactory.GetSerializer <HttpMessageSendChangesResponse>();
if (streamResponse.CanRead)
{
summaryResponseContent = await responseSerializer.DeserializeAsync(streamResponse);
}
}
if (summaryResponseContent == null)
{
throw new Exception("Summary can't be null");
}
// generate the new scope item
this.CompleteTime = DateTime.UtcNow;
return(new (summaryResponseContent.RemoteClientTimestamp, null, summaryResponseContent.ServerChangesSelected));
}
ApplyThenGetChangesAsync(ScopeInfo scope, BatchInfo clientBatchInfo, CancellationToken cancellationToken = default, IProgress <ProgressArgs> progress = null)
{
SyncSet schema;
// Get context or create a new one
var ctx = this.GetContext();
if (!this.StartTime.HasValue)
{
this.StartTime = DateTime.UtcNow;
}
//// create the in memory changes set
//var changesSet = new SyncSet();
// is it something that could happens ?
if (scope.Schema == null)
{
// Make a remote call to get Schema from remote provider
var serverScopeInfo = await this.EnsureSchemaAsync(cancellationToken, progress).ConfigureAwait(false);
schema = serverScopeInfo.Schema;
}
else
{
schema = scope.Schema;
}
schema.EnsureSchema();
// if we don't have any BatchPartsInfo, just generate a new one to get, at least, something to send to the server
// and get a response with new data from server
if (clientBatchInfo == null)
{
clientBatchInfo = new BatchInfo(true, schema);
}
// Get sanitized schema, without readonly columns
var sanitizedSchema = clientBatchInfo.SanitizedSchema;
// --------------------------------------------------------------
// STEP 1 : Send everything to the server side
// --------------------------------------------------------------
// response
HttpMessageSendChangesResponse httpMessageContent = null;
// If not in memory and BatchPartsInfo.Count == 0, nothing to send.
// But we need to send something, so generate a little batch part
if (clientBatchInfo.InMemory || (!clientBatchInfo.InMemory && clientBatchInfo.BatchPartsInfo.Count == 0))
{
var changesToSend = new HttpMessageSendChangesRequest(ctx, scope);
if (this.Converter != null && clientBatchInfo.InMemoryData != null && clientBatchInfo.InMemoryData.HasRows)
{
this.BeforeSerializeRows(clientBatchInfo.InMemoryData);
}
var containerSet = clientBatchInfo.InMemoryData == null ? new ContainerSet() : clientBatchInfo.InMemoryData.GetContainerSet();
changesToSend.Changes = containerSet;
changesToSend.IsLastBatch = true;
changesToSend.BatchIndex = 0;
// serialize message
var serializer = this.SerializerFactory.GetSerializer <HttpMessageSendChangesRequest>();
var binaryData = await serializer.SerializeAsync(changesToSend);
await this.InterceptAsync(new HttpMessageSendChangesRequestArgs(binaryData), cancellationToken).ConfigureAwait(false);
httpMessageContent = await this.httpRequestHandler.ProcessRequestAsync <HttpMessageSendChangesResponse>
(this.HttpClient, this.ServiceUri, binaryData, HttpStep.SendChanges, ctx.SessionId, scope.Name,
this.SerializerFactory, this.Converter, this.Options.BatchSize, cancellationToken).ConfigureAwait(false);
}
else
{
// Foreach part, will have to send them to the remote
// once finished, return context
foreach (var bpi in clientBatchInfo.BatchPartsInfo.OrderBy(bpi => bpi.Index))
{
// If BPI is InMempory, no need to deserialize from disk
// othewise load it
await bpi.LoadBatchAsync(sanitizedSchema, clientBatchInfo.GetDirectoryFullPath(), this);
var changesToSend = new HttpMessageSendChangesRequest(ctx, scope);
if (this.Converter != null && bpi.Data.HasRows)
{
BeforeSerializeRows(bpi.Data);
}
// Set the change request properties
changesToSend.Changes = bpi.Data.GetContainerSet();
changesToSend.IsLastBatch = bpi.IsLastBatch;
changesToSend.BatchIndex = bpi.Index;
// serialize message
var serializer = this.SerializerFactory.GetSerializer <HttpMessageSendChangesRequest>();
var binaryData = await serializer.SerializeAsync(changesToSend);
await this.InterceptAsync(new HttpMessageSendChangesRequestArgs(binaryData), cancellationToken).ConfigureAwait(false);
httpMessageContent = await this.httpRequestHandler.ProcessRequestAsync <HttpMessageSendChangesResponse>
(this.HttpClient, this.ServiceUri, binaryData, HttpStep.SendChanges, ctx.SessionId, scope.Name,
this.SerializerFactory, this.Converter, this.Options.BatchSize, cancellationToken).ConfigureAwait(false);
// for some reasons, if server don't want to wait for more, just break
// That should never happened, actually
if (httpMessageContent.ServerStep != HttpStep.SendChangesInProgress)
{
break;
}
}
}
// --------------------------------------------------------------
// STEP 2 : Receive everything from the server side
// --------------------------------------------------------------
// Now we have sent all the datas to the server and now :
// We have a FIRST response from the server with new datas
// 1) Could be the only one response (enough or InMemory is set on the server side)
// 2) Could bt the first response and we need to download all batchs
// While we have an other batch to process
var isLastBatch = false;
// Get if we need to work in memory or serialize things
var workInMemoryLocally = this.Options.BatchSize == 0;
// Create the BatchInfo and SyncContext to return at the end
// Set InMemory by default to "true", but the real value is coming from server side
var serverBatchInfo = new BatchInfo(workInMemoryLocally, schema, this.Options.BatchDirectory);
// stats
DatabaseChangesSelected serverChangesSelected = null;
DatabaseChangesApplied clientChangesApplied = null;
//timestamp generated by the server, hold in the client db
long remoteClientTimestamp = 0;
// While we are not reaching the last batch from server
do
{
// Check if we are at the last batch.
// If so, we won't make another loop
isLastBatch = httpMessageContent.IsLastBatch;
serverChangesSelected = httpMessageContent.ServerChangesSelected;
clientChangesApplied = httpMessageContent.ClientChangesApplied;
ctx = httpMessageContent.SyncContext;
remoteClientTimestamp = httpMessageContent.RemoteClientTimestamp;
var changesSet = sanitizedSchema.Clone();
changesSet.ImportContainerSet(httpMessageContent.Changes, false);
if (this.Converter != null && changesSet.HasRows)
{
AfterDeserializedRows(changesSet);
}
// Create a BatchPartInfo instance
await serverBatchInfo.AddChangesAsync(changesSet, httpMessageContent.BatchIndex, isLastBatch, this);
// free some memory
if (!workInMemoryLocally && httpMessageContent.Changes != null)
{
httpMessageContent.Changes.Clear();
}
if (!isLastBatch)
{
// Ask for the next batch index
var requestBatchIndex = httpMessageContent.BatchIndex + 1;
// Create the message enveloppe
var httpMessage = new HttpMessageGetMoreChangesRequest(ctx, requestBatchIndex);
// serialize message
var serializer = this.SerializerFactory.GetSerializer <HttpMessageGetMoreChangesRequest>();
var binaryData = await serializer.SerializeAsync(httpMessage);
await this.InterceptAsync(new HttpMessageGetMoreChangesRequestArgs(binaryData), cancellationToken).ConfigureAwait(false);
httpMessageContent = await this.httpRequestHandler.ProcessRequestAsync <HttpMessageSendChangesResponse>(
this.HttpClient, this.ServiceUri, binaryData, HttpStep.GetMoreChanges, ctx.SessionId, scope.Name,
this.SerializerFactory, this.Converter, this.Options.BatchSize, cancellationToken).ConfigureAwait(false);
}
} while (!isLastBatch);
// generate the new scope item
this.CompleteTime = DateTime.UtcNow;
// Reaffect context
this.SetContext(httpMessageContent.SyncContext);
return(remoteClientTimestamp, serverBatchInfo,
httpMessageContent.ConflictResolutionPolicy, clientChangesApplied, serverChangesSelected);
}
