/// <summary>
/// Validate the Azure connection string or throws an exception.
/// </summary>
/// <param name="connectionString">The connection string value.</param>
/// <exception cref="ArgumentNullException">Null or empty connection string.</exception>
/// <exception cref="ArgumentException">Invalid connection string.</exception>
/// <returns>The <see cref="Microsoft.WindowsAzure.Storage.CloudStorageAccount"/>.</returns>
private static CloudStorageAccount GetStorageAccount(string connectionString)
{
Guard.ArgumentNotNullOrEmpty(connectionString, "connectionString");
try
{
return(CloudStorageAccount.Parse(connectionString));
}
catch (FormatException e)
{
throw new ArgumentException(Resources.InvalidConnectionStringError, "connectionString", e);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="WindowsAzureTableSink"/> class with the specified connection string and table address.
/// </summary>
/// <param name="instanceName">The name of the instance originating the entries.</param>
/// <param name="connectionString">The connection string for the storage account.</param>
/// <param name="tableAddress">Either the name of the table, or the absolute URI to the table.</param>
/// <param name="bufferInterval">The buffering interval to wait for events to accumulate before sending them to Windows Azure Storage.</param>
/// <param name="maxBufferSize">The maximum number of entries that can be buffered while it's sending to Windows Azure Storage before the sink starts dropping entries.</param>
/// <param name="onCompletedTimeout">Defines a timeout interval for when flushing the entries after an <see cref="OnCompleted"/> call is received and before disposing the sink.
/// This means that if the timeout period elapses, some event entries will be dropped and not sent to the store. Normally, calling <see cref="IDisposable.Dispose"/> on
/// the <see cref="System.Diagnostics.Tracing.EventListener"/> will block until all the entries are flushed or the interval elapses.
/// If <see langword="null"/> is specified, then the call will block indefinitely until the flush operation finishes.</param>
public WindowsAzureTableSink(string instanceName, string connectionString, string tableAddress, TimeSpan bufferInterval, int maxBufferSize, TimeSpan onCompletedTimeout)
{
Guard.ArgumentNotNullOrEmpty(instanceName, "instanceName");
Guard.ArgumentNotNullOrEmpty(connectionString, "connectionString");
Guard.ArgumentNotNullOrEmpty(tableAddress, "tableAddress");
Guard.ArgumentIsValidTimeout(onCompletedTimeout, "onCompletedTimeout");
this.onCompletedTimeout = onCompletedTimeout;
CloudStorageAccount account = GetStorageAccount(connectionString);
if (!IsValidTableName(tableAddress))
{
throw new ArgumentException(WindowsAzureResources.InvalidTableName, "tableAddress");
}
this.instanceName = NormalizeInstanceName(instanceName);
this.client = account.CreateCloudTableClient();
this.client.RetryPolicy = new ExponentialRetry(TimeSpan.FromSeconds(5), 7);
this.table = this.client.GetTableReference(tableAddress);
string sinkId = string.Format(CultureInfo.InvariantCulture, "WindowsAzureTableSink ({0})", instanceName);
this.bufferedPublisher = new BufferedEventPublisher <CloudEventEntry>(sinkId, this.PublishEventsAsync, bufferInterval, BufferCountTrigger, maxBufferSize, this.cancellationTokenSource.Token);
}
