public async Task StartProcessor <T>(string feedName, Container.ChangesHandler <T> handler)
{
_changeFeedProcessor = _container
.GetChangeFeedProcessorBuilder(feedName, handler).WithLeaseContainer(_leaseContainer)
.WithInstanceName(feedName).WithPollInterval(TimeSpan.FromMilliseconds(50)).Build();
await _changeFeedProcessor.StartAsync();
}
public async Task <ChangeFeedProcessor> InitChangeFeedProcessorAsync(
string DataConnectionString,
string SourceDatabaseName,
string SourceContainerName,
string LeaseContainerName,
string PartitionKeyName,
Container.ChangesHandler <TEntity> ChangeHandler)
{
Container leaseContainer;
Database database;
string leaseContainerName = $"{SourceContainerName}_lease";
var processorName = $"{SourceContainerName}_changefeedwatcher";
var instanceName = $"{processorName}_host_{Guid.NewGuid().ToString().Substring(0,8)}";
//Initialize CosmosDB Connection
CosmosClient cosmosClient = new CosmosClient(DataConnectionString);
database = cosmosClient.GetDatabase(SourceDatabaseName);
if (database is null)
{
throw new NullReferenceException("Specified Database doesn't exist");
}
leaseContainer = await database.CreateContainerIfNotExistsAsync(leaseContainerName, PartitionKeyName);
ChangeFeedProcessor changeFeedProcessor = database.GetContainer(SourceContainerName)
.GetChangeFeedProcessorBuilder <TEntity>(processorName: processorName, ChangeHandler)
.WithInstanceName(instanceName)
.WithLeaseContainer(leaseContainer)
.Build();
Console.WriteLine($"Starting Change Feed Processor...{processorName} in {instanceName}");
await changeFeedProcessor.StartAsync();
Console.WriteLine($"Change Feed Processor {processorName} started in {instanceName}");
return(changeFeedProcessor);
}
