async Task SubscribeEvent(ServiceBusAdministrationClient client, Type eventType, CancellationToken cancellationToken)
{
var ruleName = transportSettings.SubscriptionRuleNamingConvention(eventType);
var sqlExpression = $"[{Headers.EnclosedMessageTypes}] LIKE '%{eventType.FullName}%'";
var rule = new CreateRuleOptions(ruleName, new SqlRuleFilter(sqlExpression));
try
{
var existingRule = await client.GetRuleAsync(transportSettings.TopicName, subscriptionName, rule.Name, cancellationToken).ConfigureAwait(false);
if (existingRule.Value.Filter.ToString() != rule.Filter.ToString())
{
existingRule.Value.Action = rule.Action;
await client.UpdateRuleAsync(transportSettings.TopicName, subscriptionName, existingRule, cancellationToken).ConfigureAwait(false);
}
}
catch (ServiceBusException sbe) when(sbe.Reason == ServiceBusFailureReason.MessagingEntityNotFound)
{
try
{
await client.CreateRuleAsync(transportSettings.TopicName, subscriptionName, rule, cancellationToken).ConfigureAwait(false);
}
catch (ServiceBusException createSbe) when(createSbe.Reason == ServiceBusFailureReason.MessagingEntityAlreadyExists)
{
}
}
}
