/// <summary>
/// Create REDIS client.
/// </summary>
/// <param name="logger">The logger.</param>
/// <param name="name">The name.</param>
/// <param name="intent">The intent.</param>
/// <param name="configuration">The configuration.</param>
/// <param name="endpointKey">The endpoint key.</param>
/// <param name="passwordKey">The password key.</param>
/// <returns></returns>
/// <exception cref="RedisConnectionException">Fail to establish REDIS connection</exception>
private async Task <ConnectionMultiplexer> CreateAsync(
ILogger logger,
string name,
RedisUsageIntent intent,
Action <ConfigurationOptions>?configuration,
string endpointKey,
string passwordKey)
{
string endpoint = Environment.GetEnvironmentVariable(endpointKey) ?? "localhost";
string?password = Environment.GetEnvironmentVariable(passwordKey);
var sb = new StringBuilder();
var writer = new StringWriter(sb);
var redisConfiguration = ConfigurationOptions.Parse(endpoint);
redisConfiguration.ClientName = name;
switch (intent)
{
case RedisUsageIntent.Admin:
redisConfiguration.AllowAdmin = true;
break;
default:
break;
}
configuration?.Invoke(redisConfiguration);
redisConfiguration.Password = password;
ConnectionMultiplexer redis;
TimeSpan delay = RETRY_INTERVAL_DELAY;
for (int i = 1; i <= RETRY_COUNT; i++)
{
try
{
redis = await ConnectionMultiplexer.ConnectAsync(redisConfiguration, writer);
return(redis);
}
catch (Exception ex)
{
writer.Flush();
if (i >= RETRY_COUNT)
{
logger.LogError(ex.FormatLazy(), $"Fail to create REDIS client [final retry ({i})]. {Environment.NewLine}{sb}");
throw;
}
if (i % 10 == 0)
{
logger.LogWarning(ex.FormatLazy(), $"Fail to create REDIS client [retry = {i}]. {Environment.NewLine}{sb}");
}
}
}
throw new RedisConnectionException(ConnectionFailureType.UnableToConnect, "Fail to establish REDIS connection");
}
/// <summary>
/// Initializes a new instance of the <see cref="RedisClientFactory" /> class.
/// </summary>
/// <param name="logger">The logger.</param>
/// <param name="name">Identification for the connection within REDIS.</param>
/// <param name="intent">The usage intent.</param>
/// <param name="configuration">The configuration.</param>
/// <param name="endpointKey">The environment key of endpoint.</param>
/// <param name="passwordKey">The environment key of password.</param>
public RedisClientFactory(
ILogger logger,
string name,
RedisUsageIntent intent,
Action <ConfigurationOptions>?configuration,
string endpointKey,
string passwordKey)
{
_multiplexerTask = CreateAsync(
logger,
name,
intent,
configuration,
endpointKey,
passwordKey);
}
