private void InitRetryPolicy()
{
// Get an instance of the RetryManager class.
_retryManager = _retryManager ?? RetryPolicyFactory.CreateDefault();
_connRetryPolicy = _retryManager.GetDefaultSqlConnectionRetryPolicy();
_cmdRetryPolicy = _retryManager.GetDefaultSqlCommandRetryPolicy();
}
/// <summary>
/// Initialize the Sql Azure settings and connections
/// </summary>
public void InitializeSqlAzure()
{
this.SqlConnectionString = ConfigurationManager.AppSettings["SqlAzureConnectionString"];
if (String.IsNullOrWhiteSpace(this.SqlConnectionString))
{
throw new ArgumentException("A required AppSetting cannot be null or empty", "SqlAzureConnectionString");
}
this.SqlTableName = ConfigurationManager.AppSettings["SqlAzureTableName"];
if (String.IsNullOrWhiteSpace(this.SqlTableName))
{
throw new ArgumentException("A required AppSetting cannot be null or empty", "SqlAzureTableName");
}
var columns = ConfigurationManager.AppSettings["SqlAzureTableColumns"];
if (String.IsNullOrWhiteSpace(columns))
{
throw new ArgumentException("A required AppSetting cannot be null or empty", "SqlAzureTableColumns");
}
this.SqlTableColumns = columns.Split(new char[] { ',', ';' }, StringSplitOptions.RemoveEmptyEntries).Select(c => c.Trim()).ToList();
//Reference: https://msdn.microsoft.com/en-us/library/azure/dn864744.aspx
//1. Define an Exponential Backoff retry strategy for Azure SQL Database throttling (ExponentialBackoff Class). An exponential back-off strategy will gracefully back off the load on the service.
int retryCount = 4;
int minBackoffDelayMilliseconds = 2000;
int maxBackoffDelayMilliseconds = 8000;
int deltaBackoffMilliseconds = 2000;
ExponentialBackoff exponentialBackoffStrategy =
new ExponentialBackoff("exponentialBackoffStrategy",
retryCount,
TimeSpan.FromMilliseconds(minBackoffDelayMilliseconds),
TimeSpan.FromMilliseconds(maxBackoffDelayMilliseconds),
TimeSpan.FromMilliseconds(deltaBackoffMilliseconds));
//2. Set a default strategy to Exponential Backoff.
RetryManager manager = new RetryManager(
new List <RetryStrategy>
{
exponentialBackoffStrategy
},
"exponentialBackoffStrategy");
//3. Set a default Retry Manager. A RetryManager provides retry functionality, or if you are using declarative configuration, you can invoke the RetryPolicyFactory.CreateDefault
RetryManager.SetDefault(manager);
//4. Define a default SQL Connection retry policy and SQL Command retry policy. A policy provides a retry mechanism for unreliable actions and transient conditions.
ConnectionRetryPolicy = manager.GetDefaultSqlConnectionRetryPolicy();
CommandRetryPolicy = manager.GetDefaultSqlCommandRetryPolicy();
//5. Create a function that will retry the connection using a ReliableSqlConnection.
InitializeSqlAzureConnection();
}
/// <summary>
/// Initialize the Sql Azure settings and connections
/// </summary>
public void InitializeSqlAzure()
{
this.SqlConnectionString = ConfigurationManager.AppSettings["SqlAzureConnectionString"];
if(String.IsNullOrWhiteSpace(this.SqlConnectionString))
{
throw new ArgumentException("A required AppSetting cannot be null or empty", "SqlAzureConnectionString");
}
this.SqlTableName = ConfigurationManager.AppSettings["SqlAzureTableName"];
if (String.IsNullOrWhiteSpace(this.SqlTableName))
{
throw new ArgumentException("A required AppSetting cannot be null or empty", "SqlAzureTableName");
}
var columns = ConfigurationManager.AppSettings["SqlAzureTableColumns"];
if (String.IsNullOrWhiteSpace(columns))
{
throw new ArgumentException("A required AppSetting cannot be null or empty", "SqlAzureTableColumns");
}
this.SqlTableColumns = columns.Split(new char[] { ',', ';' }, StringSplitOptions.RemoveEmptyEntries).Select(c => c.Trim()).ToList();
//Reference: https://msdn.microsoft.com/en-us/library/azure/dn864744.aspx
//1. Define an Exponential Backoff retry strategy for Azure SQL Database throttling (ExponentialBackoff Class). An exponential back-off strategy will gracefully back off the load on the service.
int retryCount = 4;
int minBackoffDelayMilliseconds = 2000;
int maxBackoffDelayMilliseconds = 8000;
int deltaBackoffMilliseconds = 2000;
ExponentialBackoff exponentialBackoffStrategy =
new ExponentialBackoff("exponentialBackoffStrategy",
retryCount,
TimeSpan.FromMilliseconds(minBackoffDelayMilliseconds),
TimeSpan.FromMilliseconds(maxBackoffDelayMilliseconds),
TimeSpan.FromMilliseconds(deltaBackoffMilliseconds));
//2. Set a default strategy to Exponential Backoff.
RetryManager manager = new RetryManager(
new List<RetryStrategy>
{
exponentialBackoffStrategy
},
"exponentialBackoffStrategy");
//3. Set a default Retry Manager. A RetryManager provides retry functionality, or if you are using declarative configuration, you can invoke the RetryPolicyFactory.CreateDefault
RetryManager.SetDefault(manager);
//4. Define a default SQL Connection retry policy and SQL Command retry policy. A policy provides a retry mechanism for unreliable actions and transient conditions.
ConnectionRetryPolicy = manager.GetDefaultSqlConnectionRetryPolicy();
CommandRetryPolicy = manager.GetDefaultSqlCommandRetryPolicy();
//5. Create a function that will retry the connection using a ReliableSqlConnection.
InitializeSqlAzureConnection();
}
