public static CounterSet GetRedisCounters(this RedisDatabaseAdapter adapter, OperationContext context, Tracer tracer, Counter counter)
{
var redisInfo = adapter.GetRedisInfoAsync(context, tracer, counter, serverId: null, trace: false).GetAwaiter().GetResult();
var counterSet = new CounterSet();
if (!redisInfo)
{
// The error is already logged.
return(counterSet);
}
foreach ((var serverId, var info) in redisInfo.Value.Info)
{
AddCounterValue($"{serverId}.{nameof(info.Uptime)}", (long?)info.Uptime?.TotalSeconds);
AddCounterValue($"{serverId}.{nameof(info.KeyCount)}", info.KeyCount);
AddCounterValue($"{serverId}.{nameof(info.ExpirableKeyCount)}", info.ExpirableKeyCount);
AddCounterValue($"{serverId}.{nameof(info.EvictedKeys)}", info.EvictedKeys);
AddCounterValue($"{serverId}.{nameof(info.KeySpaceHits)}", info.KeySpaceHits);
AddCounterValue($"{serverId}.{nameof(info.KeySpaceMisses)}", info.KeySpaceMisses);
AddCounterValue($"{serverId}.{nameof(info.UsedCpuAveragePersentage)}", info.UsedCpuAveragePersentage);
AddCounterValue($"{serverId}.{nameof(info.UsedMemory)}Mb", (long?)(info.UsedMemory / Math.Pow(2, 20)));
AddCounterValue($"{serverId}.{nameof(info.UsedMemoryRss)}Mb", (long?)(info.UsedMemoryRss / Math.Pow(2, 20)));
}
return(counterSet);
void AddCounterValue(string name, long?value)
{
if (value != null)
{
counterSet.Add(name, value.Value);
}
}
}
public RedisBlobAdapter(RedisDatabaseAdapter redis, TimeSpan blobExpiryTime, long maxCapacity, IClock clock)
{
_redis = redis;
_blobExpiryTime = blobExpiryTime;
_capacityExpiryTime = blobExpiryTime.Add(TimeSpan.FromMinutes(5));
_maxCapacityPerTimeBox = maxCapacity / 2;
_clock = clock;
}
/// <summary>
/// Executes a batch with a set of operations defined by <paramref name="addOperations"/> callback.
/// </summary>
/// <exception cref="OperationCanceledException">
/// If <code>context.Token</code> is cancelled or the connection is closed.
/// </exception>
public static async Task <T> ExecuteBatchAsync <T>(this RedisDatabaseAdapter adapter, OperationContext context, Func <RedisBatch, Task <T> > addOperations, RedisOperation operation)
{
var batch = adapter.CreateBatchOperation(operation);
var result = addOperations((RedisBatch)batch);
await adapter.ExecuteBatchOperationAsync(context, batch, context.Token).IgnoreFailure();
return(await result);
}
public RedisBlobAdapter(RedisDatabaseAdapter redis, IClock clock, RedisContentLocationStoreConfiguration configuration)
{
_redis = redis;
_blobExpiryTime = TimeSpan.FromMinutes(configuration.BlobExpiryTimeMinutes);
_capacityExpiryTime = _blobExpiryTime.Add(TimeSpan.FromMinutes(5));
_maxCapacityPerTimeBox = configuration.MaxBlobCapacity / 2;
_clock = clock;
_operationThrottle = new OperationThrottle(configuration.BlobOperationLimitSpan, configuration.BlobOperationLimitCount, clock);
}
/// <summary>
/// Gets the status of a redis instance.
/// </summary>
public static Task <Result <RedisInfoStats> > GetRedisInfoAsync(this RedisDatabaseAdapter adapter, OperationContext context, Tracer tracer, Counter counter, string serverId = null, bool trace = true)
{
return(context.PerformOperationAsync(
tracer,
operation: async() =>
{
var info = await adapter.GetInfoAsync(serverId);
return new Result <RedisInfoStats>(new RedisInfoStats(info));
},
traceOperationStarted: false,
extraEndMessage: (result) => result.Succeeded ? $"Redis info: {string.Join(Environment.NewLine, result.Value.Info.Select(t => $"ServerId={t.serverId}, Info={t.info.ToString()}"))}" : null,
counter: counter));
}
/// <summary>
/// Executes a batch with a set of operations defined by <paramref name="addOperations"/> callback.
/// </summary>
public static async Task <Result <T> > ExecuteBatchAsResultAsync <T>(this RedisDatabaseAdapter adapter, OperationContext context, Tracer tracer, Func <RedisBatch, Task <T> > addOperations, RedisOperation operation)
{
bool isCancelled = false;
Result <T> executeBatchResult = await context.PerformOperationAsync(
tracer,
async() =>
{
var batch = adapter.CreateBatchOperation(operation);
var result = addOperations((RedisBatch)batch);
var executeBatchOperationResult = await adapter.ExecuteBatchOperationAsync(context, batch, context.Token);
// Tracking the cancellation of redis operation to return this aspect back to the caller.
isCancelled = executeBatchOperationResult.IsCancelled;
return(Result.Success(await result));
},
traceOperationStarted : false,
traceOperationFinished : false);
executeBatchResult.IsCancelled = isCancelled;
return(executeBatchResult);
}
public bool IsTransient(Exception ex)
{
_exceptionObserver?.Invoke(ex);
// naively retry all redis server exceptions.
if (ex is RedisException redisException)
{
if (RedisDatabaseAdapter.IsRedisUnableToConnectException(redisException))
{
return(false);
}
// If the error contains the following text, then the error is not transient.
return(!(redisException.ToString().Contains("Error compiling script") || redisException.ToString().Contains("Error running script")));
}
if (ex is RedisTimeoutException)
{
return(true);
}
return(false);
}
