public static SendGridMessage ChargeTheCustomer(
[ActivityTrigger] WhatIfDemoDbDataContext.Policy policy, ILogger log)
{
string emailAddress = Environment.GetEnvironmentVariable(EmailAddressVariableName);
if (string.IsNullOrEmpty(emailAddress))
{
log.LogWarning($"TestEmailAddress is not specified, so not sending email to (userId {policy.userId}) about policy {policy.id}");
return(null);
}
log.LogWarning($"Sending email to {emailAddress} (userId {policy.userId}) about policy {policy.id}");
var message = new SendGridMessage();
message.SetFrom(emailAddress);
message.AddTo(emailAddress);
message.SetSubject($"Your regular payment for policy {policy.id} is due");
message.AddContent("text/html", $"Please, pay ${policy.paymentAmount}");
// custom monitoring with app insights
telemetryClient.GetMetric("AverageRegularPayment").TrackValue((double)policy.paymentAmount);
return(message);
}
public static SendGridMessage ChargeTheCustomer(
[ActivityTrigger] WhatIfDemoDbDataContext.Policy policy, ILogger log)
{
string emailAddress = Environment.GetEnvironmentVariable(EmailAddressVariableName);
log.LogWarning($"Sending email to {emailAddress} (userId {policy.userId}) about policy {policy.id}");
var message = new SendGridMessage();
message.SetFrom(emailAddress);
message.AddTo(emailAddress);
message.SetSubject($"Your regular payment for policy {policy.id} is due");
message.AddContent("text/html", $"Please, pay ${policy.paymentAmount}");
return(message);
}
public static async Task <WhatIfDemoDbDataContext.Policy> SavePolicyToDb(
[ActivityTrigger] WhatIfDemoDbDataContext.Policy policy,
ILogger log)
{
// Saving the policy to Azure SQL DB
var ctx = await WhatIfDemoDbDataContext.CreateAsync();
ctx.Policies.Add(policy);
await ctx.SaveChangesIdempotentlyAsync(ex => {
// Explicitly handling the case of duplicated execution.
// Which might happen, if the process crashes or restarts.
log.LogError($"Failed to add policy {policy.id} from userId {policy.userId}: {ex.Message}");
});
log.LogWarning($"Saved policy {policy.id} from userId {policy.userId}");
// Returning the Policy object back, just to show this context propagation mechanism
return(policy);
}
public static async Task ProcessOrder(
[ServiceBusTrigger("Orders", Connection = "ServiceBusConnection")]
OrderMessage order,
[OrchestrationClient]
DurableOrchestrationClient orchestrationClient,
ILogger log)
{
log.LogWarning($"Processing order from userId {order.userId}");
// Here is where we instantiate a new Policy object
var policy = new WhatIfDemoDbDataContext.Policy
{
id = Guid.NewGuid(),
userId = order.userId,
productId = order.productId,
paymentAmount = order.price,
dateCreated = DateTime.UtcNow
};
// Starting the policy processing Saga
await orchestrationClient.StartNewAsync(nameof(ProcessOrderOrchestrator), policy.id.ToString(), policy);
}
