public static async Task SaveClaimToDb(
[ActivityTrigger] WhatIfDemoDbDataContext.Claim claim,
ILogger log)
{
var ctx = await WhatIfDemoDbDataContext.CreateAsync();
ctx.Claims.Add(claim);
await ctx.SaveChangesIdempotentlyAsync(ex => {
// Explicitly handling the case of duplicated execution.
// Which might happen, if the process crashes or restarts.
log.LogError($"Failed to add policy {claim.id} from userId {claim.userId}: {ex.Message}");
});
log.LogWarning($"Saved claim {claim.id} from userId {claim.userId}");
}
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 Cleanup(
[HttpTrigger(AuthorizationLevel.Anonymous, "get", Route = null)]
HttpRequest request,
ILogger log)
{
string userId = await Helpers.GetAccessingUserIdAsync(request, acceptedAuthProviders);
// Loading user-specific data from Azure SQL database
var ctx = await WhatIfDemoDbDataContext.CreateAsync();
// Removing all records for this user from SQL DB
foreach (var policy in ctx.Policies.Where(p => p.userId == userId))
{
ctx.Policies.Remove(policy);
}
foreach (var claim in ctx.Claims.Where(p => p.userId == userId))
{
ctx.Claims.Remove(claim);
}
await ctx.SaveChangesAsync();
}
public static async Task <IEnumerable <Quote> > GetQuotes(
[HttpTrigger(AuthorizationLevel.Anonymous, "get", Route = null)]
HttpRequest request,
// Getting all documents from Cosmos DB "Products" collection as a method parameter
[CosmosDB(databaseName: "WhatIfDemoDb", collectionName: "Products", ConnectionStringSetting = "CosmosDBConnection", SqlQuery = "select * from c")]
IEnumerable <Product> products,
ILogger log)
{
string userId = await Helpers.GetAccessingUserIdAsync(request);
// Loading user-specific data from Azure SQL database
var ctx = await WhatIfDemoDbDataContext.CreateAsync();
int policiesCount = await ctx.Policies.CountAsync(p => p.userId == userId);
int claimsCount = await ctx.Claims.CountAsync(c => c.userId == userId);
// Giving 10% penalty for each claim, but not more than 200%
decimal penalty = 1M + 0.1M * claimsCount;
penalty = penalty > 2M ? 2M : penalty;
// Giving 5% discount for each previously bought policy, but not more than 50%
decimal discount = 1M - 0.05M * policiesCount;
discount = discount < 0.5M ? 0.5M : discount;
return(products.Select(p => new Quote
{
productId = p.id,
// Inferring quoteId from productId and the number of existing policies.
// quoteId will then be used as identifier for order message, and this is how we deduplicate them
quoteId = p.id + "_" + policiesCount,
title = p.title,
price = p.price * penalty * discount
}));
}
