public async Task <ChangeFeedProcessor> RunChangeFeedHostAsync()
{
string hostName = Guid.NewGuid().ToString();
Trace.TraceInformation("Host name {0}", hostName);
var docTransformer = new DefaultDocumentTransformer();
if (!String.IsNullOrEmpty(config.BlobConnectionString))
{
BlobServiceClient blobServiceClient = new BlobServiceClient(config.BlobConnectionString);
containerClient = blobServiceClient.GetBlobContainerClient(config.BlobContainerName);
await containerClient.CreateIfNotExistsAsync();
}
DateTime starttime = DateTime.MinValue.ToUniversalTime();
if (config.DataAgeInHours.HasValue)
{
if (config.DataAgeInHours.Value >= 0)
{
starttime = DateTime.UtcNow.Subtract(TimeSpan.FromHours(config.DataAgeInHours.Value));
}
}
changeFeedProcessor = sourceCollectionClient.GetContainer(config.MonitoredDbName, config.MonitoredCollectionName)
.GetChangeFeedProcessorBuilder <Document>("Live Data Migrator", ProcessChangesAsync)
.WithInstanceName(hostName)
.WithLeaseContainer(leaseCollectionClient.GetContainer(config.LeaseDbName, config.LeaseCollectionName))
.WithLeaseConfiguration(TimeSpan.FromSeconds(30))
.WithStartTime(starttime)
.WithMaxItems(1000)
.Build();
await changeFeedProcessor.StartAsync().ConfigureAwait(false);
return(changeFeedProcessor);
}
public async Task <IChangeFeedProcessor> RunChangeFeedHostAsync()
{
string hostName = Guid.NewGuid().ToString();
Trace.TraceInformation("Host name {0}", hostName);
// monitored collection info
var documentCollectionLocation = new DocumentCollectionInfo
{
Uri = new Uri(this.config.MonitoredUri),
MasterKey = this.config.MonitoredSecretKey,
DatabaseName = this.config.MonitoredDbName,
CollectionName = this.config.MonitoredCollectionName
};
var policy = new ConnectionPolicy()
{
ConnectionMode = ConnectionMode.Direct,
ConnectionProtocol = Protocol.Tcp
};
policy.PreferredLocations.Add("North Europe");
// lease collection info
var leaseCollectionLocation = new DocumentCollectionInfo
{
Uri = new Uri(this.config.LeaseUri),
MasterKey = this.config.LeaseSecretKey,
DatabaseName = this.config.LeaseDbName,
CollectionName = this.config.LeaseCollectionName,
ConnectionPolicy = policy
};
// destination collection info
var destCollInfo = new DocumentCollectionInfo
{
Uri = new Uri(this.config.DestUri),
MasterKey = this.config.DestSecretKey,
DatabaseName = this.config.DestDbName,
CollectionName = this.config.DestCollectionName
};
var processorOptions = new ChangeFeedProcessorOptions();
if (config.DataAgeInHours.HasValue)
{
if (config.DataAgeInHours.Value >= 0)
{
processorOptions.StartTime = DateTime.UtcNow.Subtract(TimeSpan.FromHours(config.DataAgeInHours.Value));
}
}
else
{
processorOptions.StartFromBeginning = true;
}
processorOptions.LeaseRenewInterval = TimeSpan.FromSeconds(30);
Trace.TraceInformation("Processor options Starts from Beginning - {0}, Lease renew interval - {1}",
processorOptions.StartFromBeginning,
processorOptions.LeaseRenewInterval.ToString());
processorOptions.MaxItemCount = 1000;
var destClient = new DocumentClient(destCollInfo.Uri, destCollInfo.MasterKey,
new ConnectionPolicy()
{
ConnectionMode = ConnectionMode.Direct, ConnectionProtocol = Protocol.Tcp
},
ConsistencyLevel.Eventual);
var docTransformer = new DefaultDocumentTransformer();
BlobContainerClient containerClient = null;
if (!String.IsNullOrEmpty(config.BlobConnectionString))
{
BlobServiceClient blobServiceClient = new BlobServiceClient(config.BlobConnectionString);
containerClient = blobServiceClient.GetBlobContainerClient(config.BlobContainerName);
await containerClient.CreateIfNotExistsAsync();
}
var docObserverFactory = new DocumentFeedObserverFactory(config.SourcePartitionKeys, config.TargetPartitionKey, destClient, destCollInfo, docTransformer, containerClient);
changeFeedProcessor = await new ChangeFeedProcessorBuilder()
.WithObserverFactory(docObserverFactory)
.WithHostName(hostName)
.WithFeedCollection(documentCollectionLocation)
.WithLeaseCollection(leaseCollectionLocation)
.WithProcessorOptions(processorOptions)
.WithFeedDocumentClient(new DocumentClient(documentCollectionLocation.Uri, documentCollectionLocation.MasterKey, policy, ConsistencyLevel.Eventual))
.BuildAsync();
await changeFeedProcessor.StartAsync().ConfigureAwait(false);
return(changeFeedProcessor);
}
