public static Result <DistributedCacheServiceRunningTracker> Create(
OperationContext context,
IClock clock,
IAbsFileSystem fileSystem,
DistributedCacheServiceConfiguration configuration,
TimeSpan startUpTime)
{
return(context.PerformOperation(Tracer,
() =>
{
var logIntervalSeconds = configuration.DistributedContentSettings.ServiceRunningLogInSeconds;
if (logIntervalSeconds == null)
{
context.TraceInfo(ServiceStartedTrace(startUpTime));
return new Result <DistributedCacheServiceRunningTracker>($"{nameof(DistributedCacheServiceRunningTracker)} is disabled");
}
var logFilePath = configuration.LocalCasSettings.GetCacheRootPathWithScenario(LocalCasServiceSettings.DefaultCacheName) / FileName;
var serviceTracker = new DistributedCacheServiceRunningTracker(context, clock, fileSystem, logIntervalSeconds.Value, logFilePath);
serviceTracker.Start(context, startUpTime).ThrowIfFailure();
return new Result <DistributedCacheServiceRunningTracker>(serviceTracker);
}));
}
/// <summary>
/// Creates and runs a distributed cache service
/// </summary>
/// <exception cref="CacheException">thrown when cache startup fails</exception>
public static async Task RunAsync(DistributedCacheServiceArguments arguments)
{
// Switching to another thread.
await Task.Yield();
var host = arguments.Host;
var startUpTime = Stopwatch.StartNew();
// NOTE(jubayard): this is the entry point for running CASaaS. At this point, the Logger inside the
// arguments holds the client's implementation of our logging interface ILogger. Here, we may override the
// client's decision with our own.
// The disposableToken helps ensure that we shutdown properly and all logs are sent to their final
// destination.
var loggerReplacement = CreateReplacementLogger(arguments);
arguments.Logger = loggerReplacement.Logger;
using var disposableToken = loggerReplacement.DisposableToken;
if (arguments.BuildCopyInfrastructure != null)
{
var(copier, pathTransformer, copyRequester) = arguments.BuildCopyInfrastructure(arguments.Logger);
arguments.Copier = copier;
arguments.PathTransformer = pathTransformer;
arguments.CopyRequester = copyRequester;
}
var logger = arguments.Logger;
var factory = new CacheServerFactory(arguments);
await host.OnStartingServiceAsync();
// Technically, this method doesn't own the file copier, but no one actually owns it.
// So to clean up the resources (and print some stats) we dispose it here.
using (arguments.Copier as IDisposable)
using (var server = factory.Create())
{
var context = new Context(logger);
var ctx = new OperationContext(context);
try
{
var startupResult = await server.StartupAsync(context);
if (!startupResult)
{
throw new CacheException(startupResult.ToString());
}
host.OnStartedService();
using var serviceRunningTracker = DistributedCacheServiceRunningTracker.Create(
ctx,
SystemClock.Instance,
new PassThroughFileSystem(),
arguments.Configuration,
startUpTime.Elapsed).GetValueOrDefault();
await arguments.Cancellation.WaitForCancellationAsync();
context.Always("Exit event set");
}
finally
{
var timeoutInMinutes = arguments?.Configuration?.DistributedContentSettings?.MaxShutdownDurationInMinutes ?? 30;
BoolResult result = await ShutdownWithTimeoutAsync(context, server, TimeSpan.FromMinutes(timeoutInMinutes));
if (!result)
{
context.Warning($"Failed to shutdown local content server: {result}");
}
host.OnTeardownCompleted();
}
}
}