public void TestBackoffStrategyCoerce()
{
var c = new Config();
c.Set("backoff_strategy", "exponential");
Assert.AreEqual(typeof(ExponentialStrategy), c.BackoffStrategy.GetType());
c.Set("backoff_strategy", "");
Assert.AreEqual(typeof(ExponentialStrategy), c.BackoffStrategy.GetType());
c.Set("backoff_strategy", null);
Assert.IsNull(c.BackoffStrategy);
c.Set("backoff_strategy", "full_jitter");
Assert.AreEqual(typeof(FullJitterStrategy), c.BackoffStrategy.GetType());
Assert.Throws<Exception>(() => c.Set("backoff_strategy", "invalid"));
var fullJitterStrategy = new FullJitterStrategy();
c.Set("backoff_strategy", fullJitterStrategy);
Assert.AreEqual(fullJitterStrategy, c.BackoffStrategy);
var exponentialStrategy = new ExponentialStrategy();
c.Set("backoff_strategy", exponentialStrategy);
Assert.AreEqual(exponentialStrategy, c.BackoffStrategy);
Assert.Throws<Exception>(() => c.Set("backoff_strategy", new object()));
}
public void TestFullJitterBackoff()
{
// afaik there's no way to seed a RNGCryptoServiceProvider (probably a good thing)
// we'll test the intent: the range will be between 0 and 2^n*backoffmultiplier
var maxExpected = new[]
{
TimeSpan.FromSeconds(0.5),
TimeSpan.FromSeconds(1),
TimeSpan.FromSeconds(4),
TimeSpan.FromSeconds(16)
};
var backoffStrategy = new FullJitterStrategy();
var config = new NsqConfig();
config.BackoffMultiplier = TimeSpan.FromSeconds(0.5);
var attempts = new[] { 1, 2, 4, 6 };
for (var count = 0; count < 50000; count++)
{
for (var i = 0; i < attempts.Length; i++)
{
var attempt = attempts[i];
var result = backoffStrategy.Calculate(config, attempt).Duration;
AssertHelper.LessOrEqual(result, maxExpected[i],
string.Format("wrong backoff duration for attempt {0}", attempt));
}
}
}
public void TestBackoffStrategyCoerce()
{
var c = new NsqConfig();
c.Set("backoff_strategy", "exponential");
Assert.AreEqual(typeof(ExponentialStrategy), c.BackoffStrategy.GetType());
c.Set("backoff_strategy", "");
Assert.AreEqual(typeof(ExponentialStrategy), c.BackoffStrategy.GetType());
c.Set("backoff_strategy", null);
Assert.IsNull(c.BackoffStrategy);
c.Set("backoff_strategy", "full_jitter");
Assert.AreEqual(typeof(FullJitterStrategy), c.BackoffStrategy.GetType());
AssertHelper.Throws <Exception>(() => c.Set("backoff_strategy", "invalid"));
var fullJitterStrategy = new FullJitterStrategy();
c.Set("backoff_strategy", fullJitterStrategy);
Assert.AreEqual(fullJitterStrategy, c.BackoffStrategy);
var exponentialStrategy = new ExponentialStrategy();
c.Set("backoff_strategy", exponentialStrategy);
Assert.AreEqual(exponentialStrategy, c.BackoffStrategy);
AssertHelper.Throws <Exception>(() => c.Set("backoff_strategy", new object()));
}
public void TestClone()
{
var c = new NsqConfig();
var backoffStrategy = new FullJitterStrategy();
var tlsConfig = new TlsConfig();
c.Set("dial_timeout", "50ms");
c.Set("read_timeout", "5m");
c.Set("heartbeat_interval", "2s");
c.Set("rdy_redistribute_interval", "3s");
c.Set("backoff_strategy", backoffStrategy);
c.Set("rdy_redistribute_on_idle", true);
c.Set("tls_config", tlsConfig);
c.Validate();
var c2 = c.Clone();
Assert.AreEqual(TimeSpan.FromMilliseconds(50), c2.DialTimeout, "dial_timeout");
Assert.AreEqual(TimeSpan.FromMinutes(5), c2.ReadTimeout, "read_timeout");
Assert.AreEqual(TimeSpan.FromSeconds(10), c2.WriteTimeout, "write_timeout");
Assert.AreEqual(TimeSpan.FromSeconds(60), c2.LookupdPollInterval, "lookupd_poll_interval");
Assert.AreEqual(0.3, c2.LookupdPollJitter, "lookupd_poll_jitter");
Assert.AreEqual(TimeSpan.FromMinutes(15), c2.MaxRequeueDelay, "max_requeue_delay");
Assert.AreEqual(TimeSpan.FromSeconds(90), c2.DefaultRequeueDelay, "default_requeue_delay");
Assert.AreEqual(backoffStrategy, c2.BackoffStrategy, "backoff_strategy");
Assert.AreEqual(TimeSpan.FromMinutes(2), c2.MaxBackoffDuration, "max_backoff_duration");
Assert.AreEqual(TimeSpan.FromSeconds(1), c2.BackoffMultiplier, "backoff_multiplier");
Assert.AreEqual(5, c2.MaxAttempts, "max_attempts");
Assert.AreEqual(TimeSpan.FromSeconds(10), c2.LowRdyIdleTimeout, "low_rdy_idle_timeout");
Assert.AreEqual(TimeSpan.FromSeconds(3), c2.RDYRedistributeInterval, "rdy_redistribute_interval");
Assert.AreEqual(true, c2.RDYRedistributeOnIdle, "rdy_redistribute_on_idle");
Assert.AreEqual(OS.Hostname().Split('.')[0], c2.ClientID, "client_id");
Assert.AreEqual(OS.Hostname(), c2.Hostname, "hostname");
Assert.AreEqual(string.Format("{0}/{1}", ClientInfo.ClientName, ClientInfo.Version), c2.UserAgent,
"user_agent");
Assert.AreEqual(TimeSpan.FromSeconds(2), c2.HeartbeatInterval, "heartbeat_interval");
Assert.AreEqual(0, c2.SampleRate, "sample_rate");
Assert.AreEqual(tlsConfig, c2.TlsConfig, "tls_config");
//Assert.AreEqual(false, c2.Deflate, "deflate"); // TODO: Deflate
//Assert.AreEqual(6, c2.DeflateLevel, "deflate_level"); // TODO: Deflate
//Assert.AreEqual(false, c2.Snappy, "snappy"); // TODO: Snappy
Assert.AreEqual(16384, c2.OutputBufferSize, "output_buffer_size");
Assert.AreEqual(TimeSpan.FromMilliseconds(250), c2.OutputBufferTimeout, "output_buffer_timeout");
Assert.AreEqual(1, c2.MaxInFlight, "max_in_flight");
Assert.AreEqual(TimeSpan.Zero, c2.MessageTimeout, "msg_timeout");
Assert.IsNull(c2.AuthSecret, "auth_secret");
}
public void TestClone()
{
var c = new Config();
var backoffStrategy = new FullJitterStrategy();
var tlsConfig = new TlsConfig();
c.Set("dial_timeout", "50ms");
c.Set("read_timeout", "5m");
c.Set("heartbeat_interval", "2s");
c.Set("rdy_redistribute_interval", "3s");
c.Set("backoff_strategy", backoffStrategy);
c.Set("rdy_redistribute_on_idle", true);
c.Set("tls_config", tlsConfig);
c.Validate();
var c2 = c.Clone();
Assert.AreEqual(TimeSpan.FromMilliseconds(50), c2.DialTimeout, "dial_timeout");
Assert.AreEqual(TimeSpan.FromMinutes(5), c2.ReadTimeout, "read_timeout");
Assert.AreEqual(TimeSpan.FromSeconds(10), c2.WriteTimeout, "write_timeout");
Assert.AreEqual(TimeSpan.FromSeconds(60), c2.LookupdPollInterval, "lookupd_poll_interval");
Assert.AreEqual(0.3, c2.LookupdPollJitter, "lookupd_poll_jitter");
Assert.AreEqual(TimeSpan.FromMinutes(15), c2.MaxRequeueDelay, "max_requeue_delay");
Assert.AreEqual(TimeSpan.FromSeconds(90), c2.DefaultRequeueDelay, "default_requeue_delay");
Assert.AreEqual(backoffStrategy, c2.BackoffStrategy, "backoff_strategy");
Assert.AreEqual(TimeSpan.FromMinutes(2), c2.MaxBackoffDuration, "max_backoff_duration");
Assert.AreEqual(TimeSpan.FromSeconds(1), c2.BackoffMultiplier, "backoff_multiplier");
Assert.AreEqual(5, c2.MaxAttempts, "max_attempts");
Assert.AreEqual(TimeSpan.FromSeconds(10), c2.LowRdyIdleTimeout, "low_rdy_idle_timeout");
Assert.AreEqual(TimeSpan.FromSeconds(3), c2.RDYRedistributeInterval, "rdy_redistribute_interval");
Assert.AreEqual(true, c2.RDYRedistributeOnIdle, "rdy_redistribute_on_idle");
Assert.AreEqual(OS.Hostname().Split('.')[0], c2.ClientID, "client_id");
Assert.AreEqual(OS.Hostname(), c2.Hostname, "hostname");
Assert.AreEqual(string.Format("{0}/{1}", ClientInfo.ClientName, ClientInfo.Version), c2.UserAgent, "user_agent");
Assert.AreEqual(TimeSpan.FromSeconds(2), c2.HeartbeatInterval, "heartbeat_interval");
Assert.AreEqual(0, c2.SampleRate, "sample_rate");
Assert.AreEqual(tlsConfig, c2.TlsConfig, "tls_config");
//Assert.AreEqual(false, c2.Deflate, "deflate"); // TODO: Deflate
//Assert.AreEqual(6, c2.DeflateLevel, "deflate_level"); // TODO: Deflate
//Assert.AreEqual(false, c2.Snappy, "snappy"); // TODO: Snappy
Assert.AreEqual(16384, c2.OutputBufferSize, "output_buffer_size");
Assert.AreEqual(TimeSpan.FromMilliseconds(250), c2.OutputBufferTimeout, "output_buffer_timeout");
Assert.AreEqual(1, c2.MaxInFlight, "max_in_flight");
Assert.AreEqual(TimeSpan.Zero, c2.MessageTimeout, "msg_timeout");
Assert.IsNull(c2.AuthSecret, "auth_secret");
}
public void TestFullJitterBackoff()
{
// afaik there's no way to seed a RNGCryptoServiceProvider (probably a good thing)
// we'll test the intent: the range will be between 0 and 2^n*backoffmultiplier
var maxExpected = new[]
{
TimeSpan.FromSeconds(0.5),
TimeSpan.FromSeconds(1),
TimeSpan.FromSeconds(4),
TimeSpan.FromSeconds(16)
};
var backoffStrategy = new FullJitterStrategy();
var config = new Config();
config.BackoffMultiplier = TimeSpan.FromSeconds(0.5);
var attempts = new[] { 0, 1, 3, 5 };
for (int count = 0; count < 50000; count++)
{
for (int i = 0; i < attempts.Length; i++)
{
int attempt = attempts[i];
var result = backoffStrategy.Calculate(config, attempt);
Assert.LessOrEqual(result, maxExpected[i], string.Format("wrong backoff duration for attempt {0}", attempt));
//Console.WriteLine(string.Format("{0} {1}", result, maxExpected[i]));
}
}
}
