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AzureBasedReminderTable.cs
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AzureBasedReminderTable.cs
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using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using Azure;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using Orleans.AzureUtils.Utilities;
using Orleans.Configuration;
using Orleans.Reminders.AzureStorage;
namespace Orleans.Runtime.ReminderService
{
public sealed class AzureBasedReminderTable : IReminderTable
{
private readonly ILogger logger;
private readonly ILoggerFactory loggerFactory;
private readonly ClusterOptions clusterOptions;
private readonly AzureTableReminderStorageOptions storageOptions;
private readonly RemindersTableManager remTableManager;
private readonly TaskCompletionSource _initializationTask = new(TaskCreationOptions.RunContinuationsAsynchronously);
public AzureBasedReminderTable(
ILoggerFactory loggerFactory,
IOptions<ClusterOptions> clusterOptions,
IOptions<AzureTableReminderStorageOptions> storageOptions)
{
this.logger = loggerFactory.CreateLogger<AzureBasedReminderTable>();
this.loggerFactory = loggerFactory;
this.clusterOptions = clusterOptions.Value;
this.storageOptions = storageOptions.Value;
this.remTableManager = new RemindersTableManager(
this.clusterOptions.ServiceId,
this.clusterOptions.ClusterId,
this.storageOptions,
this.loggerFactory);
}
public async Task StartAsync(CancellationToken cancellationToken)
{
try
{
while (true)
{
try
{
await remTableManager.InitTableAsync();
_initializationTask.TrySetResult();
return;
}
catch (Exception ex) when (!cancellationToken.IsCancellationRequested)
{
logger.LogError((int)AzureReminderErrorCode.AzureTable_39, ex, "Exception trying to create or connect to the Azure table");
await Task.Delay(TimeSpan.FromSeconds(1), cancellationToken);
}
}
}
catch (OperationCanceledException ex)
{
logger.LogError(ex, "Reminder table initialization canceled.");
_initializationTask.TrySetCanceled(ex.CancellationToken);
throw;
}
catch (Exception ex)
{
logger.LogError(ex, "Error initializing reminder table.");
_initializationTask.TrySetException(ex);
throw;
}
}
public Task StopAsync(CancellationToken cancellationToken)
{
_initializationTask.TrySetCanceled(CancellationToken.None);
return Task.CompletedTask;
}
private ReminderTableData ConvertFromTableEntryList(List<(ReminderTableEntry Entity, string ETag)> entries)
{
var remEntries = new List<ReminderEntry>();
foreach (var entry in entries)
{
#pragma warning disable RCS1075 // Avoid empty catch clause that catches System.Exception.
try
{
ReminderEntry converted = ConvertFromTableEntry(entry.Entity, entry.ETag);
remEntries.Add(converted);
}
catch (Exception)
{
// Ignoring...
}
#pragma warning restore RCS1075 // Avoid empty catch clause that catches System.Exception.
}
return new ReminderTableData(remEntries);
}
private ReminderEntry ConvertFromTableEntry(ReminderTableEntry tableEntry, string eTag)
{
try
{
return new ReminderEntry
{
GrainId = GrainId.Parse(tableEntry.GrainReference),
ReminderName = tableEntry.ReminderName,
StartAt = LogFormatter.ParseDate(tableEntry.StartAt),
Period = TimeSpan.Parse(tableEntry.Period),
ETag = eTag,
};
}
catch (Exception exc)
{
this.logger.LogError((int)AzureReminderErrorCode.AzureTable_49, exc, "Failed to parse ReminderTableEntry: {TableEntry}. This entry is corrupt, going to ignore it.", tableEntry);
throw;
}
finally
{
string serviceIdStr = this.clusterOptions.ServiceId;
if (!tableEntry.ServiceId.Equals(serviceIdStr))
{
this.logger.LogWarning(
(int)AzureReminderErrorCode.AzureTable_ReadWrongReminder,
"Read a reminder entry for wrong Service id. Read {TableEntry}, but my service id is {ServiceId}. Going to discard it.",
tableEntry,
serviceIdStr);
throw new OrleansException($"Read a reminder entry for wrong Service id. Read {tableEntry}, but my service id is {serviceIdStr}. Going to discard it.");
}
}
}
private static ReminderTableEntry ConvertToTableEntry(ReminderEntry remEntry, string serviceId, string deploymentId)
{
string partitionKey = ReminderTableEntry.ConstructPartitionKey(serviceId, remEntry.GrainId);
string rowKey = ReminderTableEntry.ConstructRowKey(remEntry.GrainId, remEntry.ReminderName);
var consistentHash = remEntry.GrainId.GetUniformHashCode();
return new ReminderTableEntry
{
PartitionKey = partitionKey,
RowKey = rowKey,
ServiceId = serviceId,
DeploymentId = deploymentId,
GrainReference = remEntry.GrainId.ToString(),
ReminderName = remEntry.ReminderName,
StartAt = LogFormatter.PrintDate(remEntry.StartAt),
Period = remEntry.Period.ToString(),
GrainRefConsistentHash = consistentHash.ToString("X8"),
ETag = new ETag(remEntry.ETag),
};
}
public async Task TestOnlyClearTable()
{
await _initializationTask.Task;
await this.remTableManager.DeleteTableEntries();
}
public async Task<ReminderTableData> ReadRows(GrainId grainId)
{
try
{
await _initializationTask.Task;
var entries = await this.remTableManager.FindReminderEntries(grainId);
ReminderTableData data = ConvertFromTableEntryList(entries);
if (this.logger.IsEnabled(LogLevel.Trace)) this.logger.LogTrace($"Read for grain {{GrainId}} Table={Environment.NewLine}{{Data}}", grainId, data.ToString());
return data;
}
catch (Exception exc)
{
this.logger.LogWarning((int)AzureReminderErrorCode.AzureTable_47,
exc,
"Intermediate error reading reminders for grain {GrainId} in table {TableName}.", grainId, this.remTableManager.TableName);
throw;
}
}
public async Task<ReminderTableData> ReadRows(uint begin, uint end)
{
try
{
await _initializationTask.Task;
var entries = await this.remTableManager.FindReminderEntries(begin, end);
ReminderTableData data = ConvertFromTableEntryList(entries);
if (this.logger.IsEnabled(LogLevel.Trace)) this.logger.LogTrace($"Read in {{RingRange}} Table={Environment.NewLine}{{Data}}", RangeFactory.CreateRange(begin, end), data);
return data;
}
catch (Exception exc)
{
this.logger.LogWarning((int)AzureReminderErrorCode.AzureTable_40,
exc,
"Intermediate error reading reminders in range {RingRange} for table {TableName}.", RangeFactory.CreateRange(begin, end), this.remTableManager.TableName);
throw;
}
}
public async Task<ReminderEntry> ReadRow(GrainId grainId, string reminderName)
{
try
{
await _initializationTask.Task;
if (this.logger.IsEnabled(LogLevel.Debug)) this.logger.LogDebug("ReadRow grainRef = {GrainId} reminderName = {ReminderName}", grainId, reminderName);
var result = await this.remTableManager.FindReminderEntry(grainId, reminderName);
return result.Entity is null ? null : ConvertFromTableEntry(result.Entity, result.ETag);
}
catch (Exception exc)
{
this.logger.LogWarning((int)AzureReminderErrorCode.AzureTable_46,
exc,
"Intermediate error reading row with grainId = {GrainId} reminderName = {ReminderName} from table {TableName}.", grainId, reminderName, this.remTableManager.TableName);
throw;
}
}
public async Task<string> UpsertRow(ReminderEntry entry)
{
try
{
await _initializationTask.Task;
if (this.logger.IsEnabled(LogLevel.Debug)) this.logger.LogDebug("UpsertRow entry = {Data}", entry.ToString());
ReminderTableEntry remTableEntry = ConvertToTableEntry(entry, this.clusterOptions.ServiceId, this.clusterOptions.ClusterId);
string result = await this.remTableManager.UpsertRow(remTableEntry);
if (result == null)
{
this.logger.LogWarning((int)AzureReminderErrorCode.AzureTable_45,
"Upsert failed on the reminder table. Will retry. Entry = {Data}", entry.ToString());
}
return result;
}
catch (Exception exc)
{
this.logger.LogWarning((int)AzureReminderErrorCode.AzureTable_42,
exc,
"Intermediate error upserting reminder entry {Data} to the table {TableName}.", entry.ToString(), this.remTableManager.TableName);
throw;
}
}
public async Task<bool> RemoveRow(GrainId grainId, string reminderName, string eTag)
{
var entry = new ReminderTableEntry
{
PartitionKey = ReminderTableEntry.ConstructPartitionKey(this.clusterOptions.ServiceId, grainId),
RowKey = ReminderTableEntry.ConstructRowKey(grainId, reminderName),
ETag = new ETag(eTag),
};
try
{
await _initializationTask.Task;
if (this.logger.IsEnabled(LogLevel.Trace)) this.logger.LogTrace("RemoveRow entry = {Data}", entry.ToString());
bool result = await this.remTableManager.DeleteReminderEntryConditionally(entry, eTag);
if (result == false)
{
this.logger.LogWarning((int)AzureReminderErrorCode.AzureTable_43,
"Delete failed on the reminder table. Will retry. Entry = {Data}", entry);
}
return result;
}
catch (Exception exc)
{
this.logger.LogWarning((int)AzureReminderErrorCode.AzureTable_44,
exc,
"Intermediate error when deleting reminder entry {Data} to the table {TableName}.", entry, this.remTableManager.TableName);
throw;
}
}
}
}