public async Task Save(String storageConnectionString, IProcess process, LeaseManager leaseManager)
{
process.SaveState(out var serialized, out var label);
var cloudBlobContainer = await AzureBlobStorageStateManager.GetCloudBlobContainer(storageConnectionString, HostLogger, initialize : false);
await AzureBlobStorageStateManager
.Save(cloudBlobContainer, deploymentId, HostLogger, processId,
new ProcessState(deploymentTimestamp, lastCheckpointedSequenceNumber, serialized, seenClock, ourClock), leaseManager.LeaseId);
}
public static async Task Doorbell(Microsoft.Azure.WebJobs.ExecutionContext executionContext, ILogger logger, EventData[] messages)
{
var stopwatch = new System.Diagnostics.Stopwatch();
stopwatch.Start();
var msg = DoorbellMessage.Deserialize(messages[0].Body.Array);
var processId = msg.ProcessId;
var applicationInfo = new TStaticApplicationInfo();
var configuration = applicationInfo.GetHostConfiguration();
var hostlogger = new LoggerWrapper(logger, $"[p{processId:d3} doorbell] ");
var lastRing = messages[messages.Length - 1].SystemProperties.SequenceNumber;
try
{
var cloudBlobContainer = await AzureBlobStorageStateManager.GetCloudBlobContainer(configuration.StorageConnectionString, hostlogger);
var stateBlob = cloudBlobContainer.GetBlockBlobReference(AzureBlobStorageStateManager.BlobName(processId));
var leaseManager = new LeaseManager(stateBlob);
if (await leaseManager.TryGetLease(hostlogger))
{
hostlogger.LogInformation($"{DateTime.UtcNow:o} Rings x{messages.Length} on {Environment.MachineName}, through #{lastRing}, lease acquired");
await RunHost(applicationInfo, configuration, processId, hostlogger, logger, leaseManager, stopwatch, executionContext.InvocationId);
}
else
{
hostlogger.LogInformation($"{DateTime.UtcNow:o} Rings x{messages.Length} on {Environment.MachineName}, through #{lastRing}, ignored");
}
}
catch (Exception e)
{
hostlogger.LogError($"Doorbell failed: {e}");
}
}
public static async Task <string> InitializeService(Microsoft.Azure.WebJobs.ExecutionContext executionContext, ILogger logger)
{
var stopwatch = new System.Diagnostics.Stopwatch();
stopwatch.Start();
var applicationInfo = new TStaticApplicationInfo();
logger = new LoggerWrapper(logger, "[initialize] ");
try
{
var configuration = applicationInfo.GetHostConfiguration();
var host = new Host <TStaticApplicationInfo>(applicationInfo, configuration, logger, 0, stopwatch, executionContext.InvocationId);
var deploymentTimestamp = DateTime.UtcNow;
var deploymentId = applicationInfo.GetDeploymentId(deploymentTimestamp);
host.SetDeploymentTimestamp(deploymentTimestamp);
// generate blobs
var cloudBlobContainer = await AzureBlobStorageStateManager.GetCloudBlobContainer(
storageConnectionString : configuration.StorageConnectionString,
logger : logger,
initialize : true
);
// check the current position in all the queues, and start from there
var initTasks = new List <Task>();
for (uint i = 0; i < host.NumberProcesses; i++)
{
StartTask(initTasks, async() =>
{
uint processId = i;
var lastEnqueued = await host.GetLastEnqueuedSequenceNumber(processId);
await AzureBlobStorageStateManager.Save(
cloudBlobContainer,
deploymentId,
logger,
processId,
new ProcessState(deploymentTimestamp, lastEnqueued));
});
}
await Task.WhenAll(initTasks);
// send ping message to process 0
var guid = Guid.NewGuid();
var message = new DoorbellMessage()
{
ProcessId = 0,
Guid = guid
};
var messageBytes = DoorbellMessage.Serialize(message);
await host.Connections.GetDoorbellSender(0).SendAsync(new EventData(messageBytes));
await host.Cleanup(true);
return(deploymentId);
}
catch (Exception e)
{
logger.LogError($"Initialize failed: {e}");
throw;
}
}