/// <summary>
/// Creates and returns a default Retry Policy for Schema based connection operations.
/// </summary>
/// <remarks>The RetryOccured event is wired to raise an RaiseAmbientRetryMessage message for a connection retry. </remarks>
/// <returns>An instance of <see cref="RetryPolicy"/> class.</returns>
internal static RetryPolicy CreateSchemaConnectionRetryPolicy(int retriesPerPhase)
{
RetryPolicy policy = new RetryPolicy.ExponentialDelayRetryPolicy(
RetryPolicy.SqlAzureTemporaryErrorDetectionStrategy.Instance,
retriesPerPhase,
RetryPolicyDefaults.DefaultBackoffIntervalFactor,
RetryPolicyDefaults.DefaultSchemaMinInterval,
RetryPolicyDefaults.DefaultMaxRetryInterval);
policy.RetryOccurred += DataConnectionFailureRetry;
return(policy);
}
/// <summary>
/// Returns the default retry policy dedicated to handling retryable conditions with data transfer SQL commands.
/// </summary>
/// <returns>The RetryPolicy policy</returns>
public static RetryPolicy CreateDefaultDataSqlCommandRetryPolicy()
{
RetryPolicy retryPolicy = new RetryPolicy.ExponentialDelayRetryPolicy(
RetryPolicy.SqlAzureTemporaryErrorDetectionStrategy.Instance,
RetryPolicyDefaults.DefaultDataCommandRetryCount,
RetryPolicyDefaults.DefaultBackoffIntervalFactor,
RetryPolicyDefaults.DefaultDataMinInterval,
RetryPolicyDefaults.DefaultMaxRetryInterval);
retryPolicy.FastFirstRetry = true;
retryPolicy.RetryOccurred += CommandFailureRetry;
return(retryPolicy);
}
/// <summary>
/// Returns the default retry policy dedicated to handling exceptions with SQL connections
/// </summary>
/// <returns>The RetryPolicy policy</returns>
public static RetryPolicy CreateDefaultConnectionRetryPolicy()
{
// Note: No longer use Ado.net Connection Pooling and hence do not need TimeBasedRetryPolicy to
// conform to the backoff requirements in this case
RetryPolicy retryPolicy = new RetryPolicy.ExponentialDelayRetryPolicy(
RetryPolicy.NetworkConnectivityErrorDetectionStrategy.Instance,
RetryPolicyDefaults.DefaultConnectionRetryCount,
RetryPolicyDefaults.DefaultBackoffIntervalFactor,
RetryPolicyDefaults.DefaultSchemaMinInterval,
RetryPolicyDefaults.DefaultMaxRetryInterval);
retryPolicy.FastFirstRetry = true;
return(retryPolicy);
}
/// <summary>
/// Creates and returns an "primary key violation" command Retry Policy.
/// </summary>
/// <param name="ignorableErrorNumbers">Errors to ignore if they occur after first retry</param>
/// <remarks>
/// The RetryOccured event is wired to raise an RaiseAmbientRetryMessage message for a command retry.
/// The IgnoreErrorOccurred event is wired to raise an RaiseAmbientIgnoreMessage message for ignore.
/// </remarks>
/// <returns>An instance of <see cref="RetryPolicy"/> class.</returns>
internal static RetryPolicy CreatePrimaryKeyCommandRetryPolicy()
{
RetryPolicy.SqlAzureTemporaryAndIgnorableErrorDetectionStrategy errorDetectionStrategy =
new RetryPolicy.SqlAzureTemporaryAndIgnorableErrorDetectionStrategy(SqlErrorNumbers.PrimaryKeyViolationErrorNumber);
RetryPolicy policy = new RetryPolicy.ExponentialDelayRetryPolicy(
errorDetectionStrategy,
RetryPolicyDefaults.DefaulSchemaRetryCount,
RetryPolicyDefaults.DefaultBackoffIntervalFactor,
RetryPolicyDefaults.DefaultSchemaMinInterval,
RetryPolicyDefaults.DefaultMaxRetryInterval);
policy.FastFirstRetry = true;
policy.RetryOccurred += CommandFailureRetry;
policy.IgnoreErrorOccurred += CommandFailureIgnore;
return(policy);
}
/// <summary>
/// Creates and returns a Retry Policy for database creation operations.
/// </summary>
/// <param name="ignorableErrorNumbers">Errors to ignore if they occur after first retry</param>
/// <remarks>
/// The RetryOccured event is wired to raise an RaiseAmbientRetryMessage message for a command retry.
/// The IgnoreErrorOccurred event is wired to raise an RaiseAmbientIgnoreMessage message for ignore.
/// </remarks>
/// <returns>An instance of <see cref="RetryPolicy"/> class.</returns>
internal static RetryPolicy CreateDatabaseCommandRetryPolicy(params int[] ignorableErrorNumbers)
{
RetryPolicy.SqlAzureTemporaryAndIgnorableErrorDetectionStrategy errorDetectionStrategy =
new RetryPolicy.SqlAzureTemporaryAndIgnorableErrorDetectionStrategy(ignorableErrorNumbers);
// 30, 60, 60, 60, 60 second retries
RetryPolicy policy = new RetryPolicy.ExponentialDelayRetryPolicy(
errorDetectionStrategy,
RetryPolicyDefaults.DefaultCreateDatabaseRetryCount /* maxRetryCount */,
RetryPolicyDefaults.DefaultBackoffIntervalFactor,
TimeSpan.FromSeconds(30) /* minInterval */,
TimeSpan.FromSeconds(60) /* maxInterval */);
policy.FastFirstRetry = false;
policy.RetryOccurred += CreateDatabaseCommandFailureRetry;
policy.IgnoreErrorOccurred += CreateDatabaseCommandFailureIgnore;
return(policy);
}
/// <summary>
/// Creates and returns an "ignoreable" command Retry Policy.
/// </summary>
/// <param name="ignorableErrorNumbers">Errors to ignore if they occur after first retry</param>
/// <remarks>
/// The RetryOccured event is wired to raise an RaiseAmbientRetryMessage message for a command retry.
/// The IgnoreErrorOccurred event is wired to raise an RaiseAmbientIgnoreMessage message for ignore.
/// </remarks>
/// <returns>An instance of <see cref="RetryPolicy"/> class.</returns>
internal static RetryPolicy CreateElementCommandRetryPolicy(params int[] ignorableErrorNumbers)
{
Debug.Assert(ignorableErrorNumbers != null);
RetryPolicy.SqlAzureTemporaryAndIgnorableErrorDetectionStrategy errorDetectionStrategy =
new RetryPolicy.SqlAzureTemporaryAndIgnorableErrorDetectionStrategy(ignorableErrorNumbers);
RetryPolicy policy = new RetryPolicy.ExponentialDelayRetryPolicy(
errorDetectionStrategy,
RetryPolicyDefaults.DefaulSchemaRetryCount,
RetryPolicyDefaults.DefaultBackoffIntervalFactor,
RetryPolicyDefaults.DefaultSchemaMinInterval,
RetryPolicyDefaults.DefaultMaxRetryInterval);
policy.FastFirstRetry = false;
policy.RetryOccurred += ElementCommandFailureRetry;
policy.IgnoreErrorOccurred += ElementCommandFailureIgnore;
return(policy);
}
/// <summary>
/// Creates and returns a default Retry Policy for Schema based operations.
/// </summary>
/// <returns>An instance of <see cref="RetryPolicy"/> class.</returns>
internal static RetryPolicy CreateDefaultSchemaCommandRetryPolicy(bool useRetry, int retriesPerPhase = RetryPolicyDefaults.DefaulSchemaRetryCount)
{
RetryPolicy policy;
if (useRetry)
{
policy = new RetryPolicy.ExponentialDelayRetryPolicy(
RetryPolicy.SqlAzureTemporaryErrorDetectionStrategy.Instance,
retriesPerPhase,
RetryPolicyDefaults.DefaultBackoffIntervalFactor,
RetryPolicyDefaults.DefaultSchemaMinInterval,
RetryPolicyDefaults.DefaultMaxRetryInterval);
policy.FastFirstRetry = false;
}
else
{
policy = CreateNoRetryPolicy();
}
return(policy);
}