public async Task ConnectAsync(string configFile)
{
// Setup
var config = await BigtableConfig.LoadAsync(configFile);
var credentials = await BigtableCredentials.UseApplicationDefaultCredentialsAsync();
// Get mapper
_bigtable = new Bigtable(credentials, config);
}
public static async Task Run()
{
// Disable Grpc logging
GrpcEnvironment.DisableLogging();
try
{
// Create config
var config = Utilities.GetConfig();
// Create credentials
var credentials = await BigtableCredentials.UseApplicationDefaultCredentialsAsync();
// Mapper client
using (var bigtable = new Bigtable(credentials, config))
{
var tableExists = await bigtable.TableExists <Pricing>();
// Ensure pricing table exists
if (!tableExists)
{
// Inform user
CommandLine.InformUser("Setup", "Missing example table. Please run the Examples.Bootstrap project.");
// Hard stop
return;
}
// -----------------------------------------------------------------------------------------------------------------///
// Inform User
CommandLine.InformUser("Start", "Getting first pricing poco record");
// Seek one record
var firstPricing = await bigtable.GetFirstRowAsync <Pricing>();
// Show user
DisplayPricing(firstPricing);
// -----------------------------------------------------------------------------------------------------------------///
// Inform User
CommandLine.WaitForUserAndThen("get keyed pricing poco");
// Seek one record
var pricing = await bigtable.GetAsync(new Pricing { Id = Constants.SeekId, Date = Constants.SeekDate });
// Show user
DisplayPricing(pricing);
// -----------------------------------------------------------------------------------------------------------------///
// Inform User
CommandLine.WaitForUserAndThen("get alternate-schema pricing poco");
// Seek one record using alternate schema
var simplePricing = await bigtable.GetAsync(new SimplePricing { Id = Constants.SeekId, Date = Constants.SeekDate });
// Show user
DisplayPricing(FromSimplePricing(simplePricing));
// -----------------------------------------------------------------------------------------------------------------///
// Inform User
CommandLine.WaitForUserAndThen("scan partially-keyed pricing poco");
// Seek one record
var pricings = await bigtable.ScanAsync(new Pricing { Id = Constants.SeekId }, new Pricing { Id = Constants.SeekId + 1 });
// Show user
DisplayPricing(pricings.ToArray());
// -----------------------------------------------------------------------------------------------------------------///
// Inform User
CommandLine.WaitForUserAndThen("read write read");
// Seek one record
var rewrite = await bigtable.GetAsync(new Pricing { Id = Constants.SeekId, Date = Constants.SeekDate + 1 });
DisplayPricing(rewrite);
var tempHigh = rewrite.High;
var tempLow = rewrite.Low;
rewrite.High = 142;
rewrite.Low = null;
await bigtable.UpdateAsync(rewrite);
var rewriteRead = await bigtable.GetAsync(new Pricing { Id = Constants.SeekId, Date = Constants.SeekDate + 1 });
DisplayPricing(rewrite, rewriteRead);
rewrite.High = tempHigh;
rewrite.Low = tempLow;
await bigtable.UpdateAsync(rewrite);
}
}
catch (Exception exception)
{
CommandLine.InformUser("Oops", "Example didn't work out as planned");
CommandLine.RenderException(exception);
}
finally
{
// All done
CommandLine.WaitForUserAndThen("exit");
}
}
