public void TestFallbackMissing()
{
IHystrixCommandGroupKey groupKey = HystrixCommandGroupKeyDefault.AsKey("ThreadPool-K");
IHystrixThreadPoolKey threadPoolKey = HystrixThreadPoolKeyDefault.AsKey("ThreadPool-K");
IHystrixCommandKey key = HystrixCommandKeyDefault.AsKey("RollingCounter-K");
stream = RollingThreadPoolEventCounterStream.GetInstance(threadPoolKey, 10, 500);
stream.StartCachingStreamValuesIfUnstarted();
CountdownEvent latch = new CountdownEvent(1);
stream.Observe().Take(5).Subscribe(GetSubscriber(output, latch));
CommandStreamTest.Command cmd = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.FAILURE, 20, HystrixEventType.FALLBACK_MISSING);
cmd.Observe();
try
{
Assert.True(latch.Wait(10000));
}
catch (Exception)
{
Assert.False(true, "Interrupted ex");
}
Assert.Equal(2, stream.Latest.Length);
Assert.Equal(1, stream.GetLatestCount(ThreadPoolEventType.EXECUTED));
Assert.Equal(0, stream.GetLatestCount(ThreadPoolEventType.REJECTED));
}
public void Before()
{
this.context = HystrixRequestContext.InitializeContext();
HystrixCommandMetrics.Reset();
HystrixThreadPoolMetrics.Reset();
HystrixCollapserMetrics.Reset();
// clear collapsers
RequestCollapserFactory.Reset();
// clear circuit breakers
HystrixCircuitBreakerFactory.Reset();
HystrixPlugins.Reset();
HystrixOptionsFactory.Reset();
// clear up all streams
CumulativeCollapserEventCounterStream.Reset();
CumulativeCommandEventCounterStream.Reset();
CumulativeThreadPoolEventCounterStream.Reset();
RollingCollapserBatchSizeDistributionStream.Reset();
RollingCollapserEventCounterStream.Reset();
RollingCommandEventCounterStream.Reset();
RollingCommandLatencyDistributionStream.Reset();
RollingCommandMaxConcurrencyStream.Reset();
RollingCommandUserLatencyDistributionStream.Reset();
RollingThreadPoolEventCounterStream.Reset();
RollingThreadPoolMaxConcurrencyStream.Reset();
}
public RollingThreadPoolEventCounterStreamTest(ITestOutputHelper output)
: base()
{
this.output = output;
HystrixThreadPoolCompletionStream.Reset();
RollingThreadPoolEventCounterStream.Reset();
}
public async Task TestMultipleEventsOverTimeGetStoredAndAgeOut()
{
var groupKey = HystrixCommandGroupKeyDefault.AsKey("ThreadPool-M");
var threadPoolKey = HystrixThreadPoolKeyDefault.AsKey("ThreadPool-M");
var key = HystrixCommandKeyDefault.AsKey("RollingCounter-M");
var latch = new CountdownEvent(1);
var observer = new LatchedObserver(output, latch);
stream = RollingThreadPoolEventCounterStream.GetInstance(threadPoolKey, 10, 250);
latchSubscription = stream.Observe().Take(20 + LatchedObserver.STABLE_TICK_COUNT).Subscribe(observer);
Assert.True(Time.WaitUntil(() => observer.StreamRunning, 2000), "Stream failed to start");
var cmd1 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.SUCCESS, 20);
var cmd2 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.FAILURE, 10);
await cmd1.Observe();
await cmd2.Observe();
Assert.True(latch.Wait(10000), "CountdownEvent was not set!");
output.WriteLine("ReqLog : " + HystrixRequestLog.CurrentRequestLog.GetExecutedCommandsAsString());
// all commands should have aged out
Assert.Equal(2, stream.Latest.Length);
Assert.Equal(0, stream.GetLatestCount(ThreadPoolEventType.EXECUTED));
Assert.Equal(0, stream.GetLatestCount(ThreadPoolEventType.REJECTED));
}
public void TestThreadPoolRejected()
{
IHystrixCommandGroupKey groupKey = HystrixCommandGroupKeyDefault.AsKey("ThreadPool-I");
IHystrixThreadPoolKey threadPoolKey = HystrixThreadPoolKeyDefault.AsKey("ThreadPool-I");
IHystrixCommandKey key = HystrixCommandKeyDefault.AsKey("RollingCounter-I");
stream = RollingThreadPoolEventCounterStream.GetInstance(threadPoolKey, 10, 500);
stream.StartCachingStreamValuesIfUnstarted();
CountdownEvent latch = new CountdownEvent(1);
stream.Observe().Take(5).Subscribe(GetSubscriber(output, latch));
// 10 commands will saturate threadpools when called concurrently.
// submit 2 more requests and they should be THREADPOOL_REJECTED
// should see 10 SUCCESSes, 2 THREADPOOL_REJECTED and 2 FALLBACK_SUCCESSes
List <CommandStreamTest.Command> saturators = new List <CommandStreamTest.Command>();
for (int i = 0; i < 10; i++)
{
saturators.Add(CommandStreamTest.Command.From(groupKey, key, HystrixEventType.SUCCESS, 200));
}
CommandStreamTest.Command rejected1 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.SUCCESS, 0);
CommandStreamTest.Command rejected2 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.SUCCESS, 0);
foreach (CommandStreamTest.Command saturator in saturators)
{
saturator.Observe();
}
try
{
Time.Wait(100);
}
catch (Exception ie)
{
Assert.False(true, ie.Message);
}
rejected1.Observe();
rejected2.Observe();
try
{
Assert.True(latch.Wait(10000));
}
catch (Exception)
{
Assert.False(true, "Interrupted ex");
}
output.WriteLine("ReqLog : " + HystrixRequestLog.CurrentRequestLog.GetExecutedCommandsAsString());
Assert.True(rejected1.IsResponseThreadPoolRejected);
Assert.True(rejected2.IsResponseThreadPoolRejected);
// none of these got executed on a thread-pool, so thread pool metrics should be 0
Assert.Equal(2, stream.Latest.Length);
Assert.Equal(10, stream.GetLatestCount(ThreadPoolEventType.EXECUTED));
Assert.Equal(2, stream.GetLatestCount(ThreadPoolEventType.REJECTED));
}
public async Task TestRequestFromCache()
{
var groupKey = HystrixCommandGroupKeyDefault.AsKey("ThreadPool-F");
var threadPoolKey = HystrixThreadPoolKeyDefault.AsKey("ThreadPool-F");
var key = HystrixCommandKeyDefault.AsKey("RollingCounter-F");
var latch = new CountdownEvent(1);
var observer = new LatchedObserver(output, latch);
stream = RollingThreadPoolEventCounterStream.GetInstance(threadPoolKey, 10, 500);
latchSubscription = stream.Observe().Subscribe(observer);
Assert.True(Time.WaitUntil(() => observer.StreamRunning, 2000), "Stream failed to start");
var cmd1 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.SUCCESS, 0);
var cmd2 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.RESPONSE_FROM_CACHE);
var cmd3 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.RESPONSE_FROM_CACHE);
await cmd1.Observe();
await cmd2.Observe();
await cmd3.Observe();
Assert.True(WaitForLatchedObserverToUpdate(observer, 1, 2000, output), "Latch took to long to update");
// RESPONSE_FROM_CACHE should not show up at all in thread pool counters - just the success
Assert.Equal(2, stream.Latest.Length);
Assert.Equal(1, stream.GetLatestCount(ThreadPoolEventType.EXECUTED));
Assert.Equal(0, stream.GetLatestCount(ThreadPoolEventType.REJECTED));
}
public void TestSemaphoreRejected()
{
IHystrixCommandGroupKey groupKey = HystrixCommandGroupKeyDefault.AsKey("ThreadPool-H");
IHystrixThreadPoolKey threadPoolKey = HystrixThreadPoolKeyDefault.AsKey("ThreadPool-H");
IHystrixCommandKey key = HystrixCommandKeyDefault.AsKey("RollingCounter-H");
stream = RollingThreadPoolEventCounterStream.GetInstance(threadPoolKey, 10, 500);
stream.StartCachingStreamValuesIfUnstarted();
CountdownEvent latch = new CountdownEvent(1);
stream.Observe().Take(5).Subscribe(new LatchedObserver(output, latch));
// 10 commands will saturate semaphore when called from different threads.
// submit 2 more requests and they should be SEMAPHORE_REJECTED
// should see 10 SUCCESSes, 2 SEMAPHORE_REJECTED and 2 FALLBACK_SUCCESSes
List <Command> saturators = new List <Command>();
for (int i = 0; i < 10; i++)
{
saturators.Add(Command.From(groupKey, key, HystrixEventType.SUCCESS, 500, ExecutionIsolationStrategy.SEMAPHORE));
}
Command rejected1 = Command.From(groupKey, key, HystrixEventType.SUCCESS, 0, ExecutionIsolationStrategy.SEMAPHORE);
Command rejected2 = Command.From(groupKey, key, HystrixEventType.SUCCESS, 0, ExecutionIsolationStrategy.SEMAPHORE);
foreach (Command saturator in saturators)
{
Task t = new Task(
() =>
{
saturator.Observe();
}, CancellationToken.None,
TaskCreationOptions.LongRunning);
t.Start();
}
try
{
Time.Wait(100);
}
catch (Exception ie)
{
Assert.False(true, ie.Message);
}
rejected1.Observe();
rejected2.Observe();
Assert.True(latch.Wait(10000), "CountdownEvent was not set!");
output.WriteLine("ReqLog : " + HystrixRequestLog.CurrentRequestLog.GetExecutedCommandsAsString());
Assert.True(rejected1.IsResponseSemaphoreRejected);
Assert.True(rejected2.IsResponseSemaphoreRejected);
// none of these got executed on a thread-pool, so thread pool metrics should be 0
Assert.Equal(2, stream.Latest.Length);
Assert.Equal(0, stream.GetLatestCount(ThreadPoolEventType.EXECUTED));
Assert.Equal(0, stream.GetLatestCount(ThreadPoolEventType.REJECTED));
}
internal static void Reset()
{
RollingThreadPoolEventCounterStream.Reset();
CumulativeThreadPoolEventCounterStream.Reset();
RollingThreadPoolMaxConcurrencyStream.Reset();
Metrics.Clear();
}
public override void Dispose()
{
latchSubscription?.Dispose();
stream?.Unsubscribe();
latchSubscription = null;
stream = null;
base.Dispose();
}
private HystrixThreadPoolMetrics(IHystrixThreadPoolKey threadPoolKey, IHystrixTaskScheduler threadPool, IHystrixThreadPoolOptions properties) : base(null)
{
this.threadPoolKey = threadPoolKey;
this.threadPool = threadPool;
this.properties = properties;
rollingCounterStream = RollingThreadPoolEventCounterStream.GetInstance(threadPoolKey, properties);
cumulativeCounterStream = CumulativeThreadPoolEventCounterStream.GetInstance(threadPoolKey, properties);
rollingThreadPoolMaxConcurrencyStream = RollingThreadPoolMaxConcurrencyStream.GetInstance(threadPoolKey, properties);
}
public void TestFallbackRejection()
{
IHystrixCommandGroupKey groupKey = HystrixCommandGroupKeyDefault.AsKey("ThreadPool-L");
IHystrixThreadPoolKey threadPoolKey = HystrixThreadPoolKeyDefault.AsKey("ThreadPool-L");
IHystrixCommandKey key = HystrixCommandKeyDefault.AsKey("RollingCounter-L");
stream = RollingThreadPoolEventCounterStream.GetInstance(threadPoolKey, 10, 500);
stream.StartCachingStreamValuesIfUnstarted();
CountdownEvent latch = new CountdownEvent(1);
stream.Observe().Take(5).Subscribe(GetSubscriber(output, latch));
// fallback semaphore size is 5. So let 5 commands saturate that semaphore, then
// let 2 more commands go to fallback. they should get rejected by the fallback-semaphore
List <CommandStreamTest.Command> fallbackSaturators = new List <CommandStreamTest.Command>();
for (int i = 0; i < 5; i++)
{
fallbackSaturators.Add(CommandStreamTest.Command.From(groupKey, key, HystrixEventType.FAILURE, 20, HystrixEventType.FALLBACK_SUCCESS, 400));
}
CommandStreamTest.Command rejection1 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.FAILURE, 20, HystrixEventType.FALLBACK_SUCCESS, 0);
CommandStreamTest.Command rejection2 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.FAILURE, 20, HystrixEventType.FALLBACK_SUCCESS, 0);
foreach (CommandStreamTest.Command saturator in fallbackSaturators)
{
saturator.Observe();
}
try
{
Time.Wait(70);
}
catch (Exception ie)
{
Assert.False(true, ie.Message);
}
rejection1.Observe();
rejection2.Observe();
try
{
Assert.True(latch.Wait(10000));
}
catch (Exception)
{
Assert.False(true, "Interrupted ex");
}
// all 7 commands executed on-thread, so should be executed according to thread-pool metrics
Assert.Equal(2, stream.Latest.Length);
Assert.Equal(7, stream.GetLatestCount(ThreadPoolEventType.EXECUTED));
Assert.Equal(0, stream.GetLatestCount(ThreadPoolEventType.REJECTED));
}
public void TestShortCircuited()
{
IHystrixCommandGroupKey groupKey = HystrixCommandGroupKeyDefault.AsKey("ThreadPool-G");
IHystrixThreadPoolKey threadPoolKey = HystrixThreadPoolKeyDefault.AsKey("ThreadPool-G");
IHystrixCommandKey key = HystrixCommandKeyDefault.AsKey("RollingCounter-G");
stream = RollingThreadPoolEventCounterStream.GetInstance(threadPoolKey, 10, 500);
stream.StartCachingStreamValuesIfUnstarted();
CountdownEvent latch = new CountdownEvent(1);
stream.Observe().Take(5).Subscribe(GetSubscriber(output, latch));
//3 failures in a row will trip circuit. let bucket roll once then submit 2 requests.
//should see 3 FAILUREs and 2 SHORT_CIRCUITs and each should see a FALLBACK_SUCCESS
CommandStreamTest.Command failure1 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.FAILURE, 20);
CommandStreamTest.Command failure2 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.FAILURE, 20);
CommandStreamTest.Command failure3 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.FAILURE, 20);
CommandStreamTest.Command shortCircuit1 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.SUCCESS);
CommandStreamTest.Command shortCircuit2 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.SUCCESS);
failure1.Observe();
failure2.Observe();
failure3.Observe();
Time.Wait(150);
shortCircuit1.Observe();
shortCircuit2.Observe();
try
{
Assert.True(latch.Wait(10000));
}
catch (Exception)
{
Assert.False(true, "Interrupted ex");
}
output.WriteLine("ReqLog : " + HystrixRequestLog.CurrentRequestLog.GetExecutedCommandsAsString());
Assert.True(shortCircuit1.IsResponseShortCircuited);
Assert.True(shortCircuit2.IsResponseShortCircuited);
//only the FAILUREs should show up in thread pool counters
Assert.Equal(2, stream.Latest.Length);
Assert.Equal(3, stream.GetLatestCount(ThreadPoolEventType.EXECUTED));
Assert.Equal(0, stream.GetLatestCount(ThreadPoolEventType.REJECTED));
}
public void TestEmptyStreamProducesZeros()
{
var threadPoolKey = HystrixThreadPoolKeyDefault.AsKey("ThreadPool-A");
var latch = new CountdownEvent(1);
var observer = new LatchedObserver(output, latch);
stream = RollingThreadPoolEventCounterStream.GetInstance(threadPoolKey, 10, 500);
latchSubscription = stream.Observe().Subscribe(observer);
Assert.True(Time.WaitUntil(() => observer.StreamRunning, 2000), "Stream failed to start");
Assert.True(WaitForLatchedObserverToUpdate(observer, 1, 2000, output), "Latch took to long to update");
Assert.Equal(2, stream.Latest.Length);
Assert.Equal(0, stream.GetLatestCount(ThreadPoolEventType.EXECUTED) + stream.GetLatestCount(ThreadPoolEventType.REJECTED));
}
public async void TestThreadPoolRejected()
{
var groupKey = HystrixCommandGroupKeyDefault.AsKey("ThreadPool-I");
var threadPoolKey = HystrixThreadPoolKeyDefault.AsKey("ThreadPool-I");
var key = HystrixCommandKeyDefault.AsKey("RollingCounter-I");
var latch = new CountdownEvent(1);
var observer = new LatchedObserver(output, latch);
stream = RollingThreadPoolEventCounterStream.GetInstance(threadPoolKey, 10, 500);
latchSubscription = stream.Observe().Subscribe(observer);
Assert.True(Time.WaitUntil(() => observer.StreamRunning, 2000), "Stream failed to start");
// 10 commands will saturate threadpools when called concurrently.
// submit 2 more requests and they should be THREADPOOL_REJECTED
// should see 10 SUCCESSes, 2 THREADPOOL_REJECTED and 2 FALLBACK_SUCCESSes
var saturators = new List <Command>();
for (int i = 0; i < 10; i++)
{
saturators.Add(CommandStreamTest.Command.From(groupKey, key, HystrixEventType.SUCCESS, 500));
}
var rejected1 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.SUCCESS, 0);
var rejected2 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.SUCCESS, 0);
var tasks = new List <Task>();
foreach (var saturator in saturators)
{
tasks.Add(saturator.ExecuteAsync());
}
await Task.Delay(50);
await rejected1.Observe();
await rejected2.Observe();
Task.WaitAll(tasks.ToArray());
Assert.True(WaitForLatchedObserverToUpdate(observer, 1, 2000, output), "Latch took to long to update");
Assert.True(rejected1.IsResponseThreadPoolRejected, "Command1 IsResponseThreadPoolRejected");
Assert.True(rejected2.IsResponseThreadPoolRejected, "Command2 IsResponseThreadPoolRejected");
// none of these got executed on a thread-pool, so thread pool metrics should be 0
Assert.Equal(2, stream.Latest.Length);
Assert.Equal(10, stream.GetLatestCount(ThreadPoolEventType.EXECUTED));
Assert.Equal(2, stream.GetLatestCount(ThreadPoolEventType.REJECTED));
}
public async void TestSemaphoreRejected()
{
IHystrixCommandGroupKey groupKey = HystrixCommandGroupKeyDefault.AsKey("ThreadPool-H");
IHystrixThreadPoolKey threadPoolKey = HystrixThreadPoolKeyDefault.AsKey("ThreadPool-H");
IHystrixCommandKey key = HystrixCommandKeyDefault.AsKey("RollingCounter-H");
CountdownEvent latch = new CountdownEvent(1);
var observer = new LatchedObserver(output, latch);
stream = RollingThreadPoolEventCounterStream.GetInstance(threadPoolKey, 10, 500);
latchSubscription = stream.Observe().Subscribe(observer);
Assert.True(Time.WaitUntil(() => observer.StreamRunning, 2000), "Stream failed to start");
// 10 commands will saturate semaphore when called from different threads.
// submit 2 more requests and they should be SEMAPHORE_REJECTED
// should see 10 SUCCESSes, 2 SEMAPHORE_REJECTED and 2 FALLBACK_SUCCESSes
List <Command> saturators = new List <Command>();
for (int i = 0; i < 10; i++)
{
saturators.Add(Command.From(groupKey, key, HystrixEventType.SUCCESS, 500, ExecutionIsolationStrategy.SEMAPHORE));
}
Command rejected1 = Command.From(groupKey, key, HystrixEventType.SUCCESS, 0, ExecutionIsolationStrategy.SEMAPHORE);
Command rejected2 = Command.From(groupKey, key, HystrixEventType.SUCCESS, 0, ExecutionIsolationStrategy.SEMAPHORE);
List <Task> tasks = new List <Task>();
foreach (Command saturator in saturators)
{
tasks.Add(Task.Run(() => saturator.Execute()));
}
await Task.Delay(50);
await Task.Run(() => rejected1.Execute());
await Task.Run(() => rejected2.Execute());
Task.WaitAll(tasks.ToArray());
Assert.True(WaitForLatchedObserverToUpdate(observer, 1, 2000, output), "Latch took to long to update");
Assert.True(rejected1.IsResponseSemaphoreRejected, "rejected1 not rejected");
Assert.True(rejected2.IsResponseSemaphoreRejected, "rejected2 not rejected");
// none of these got executed on a thread-pool, so thread pool metrics should be 0
Assert.Equal(2, stream.Latest.Length);
Assert.Equal(0, stream.GetLatestCount(ThreadPoolEventType.EXECUTED));
Assert.Equal(0, stream.GetLatestCount(ThreadPoolEventType.REJECTED));
}
public static void ShutdownThreads()
{
CumulativeCommandEventCounterStream.Reset();
CumulativeThreadPoolEventCounterStream.Reset();
RollingCommandEventCounterStream.Reset();
RollingThreadPoolEventCounterStream.Reset();
RollingCollapserEventCounterStream.Reset();
RollingCollapserEventCounterStream.Reset();
HealthCountsStream.Reset();
RollingCollapserBatchSizeDistributionStream.Reset();
RollingCommandLatencyDistributionStream.Reset();
RollingCommandUserLatencyDistributionStream.Reset();
RollingCommandMaxConcurrencyStream.Reset();
RollingThreadPoolMaxConcurrencyStream.Reset();
}
public async void TestFallbackRejection()
{
var groupKey = HystrixCommandGroupKeyDefault.AsKey("ThreadPool-L");
var threadPoolKey = HystrixThreadPoolKeyDefault.AsKey("ThreadPool-L");
var key = HystrixCommandKeyDefault.AsKey("RollingCounter-L");
var latch = new CountdownEvent(1);
var observer = new LatchedObserver(output, latch);
stream = RollingThreadPoolEventCounterStream.GetInstance(threadPoolKey, 10, 500);
latchSubscription = stream.Observe().Subscribe(observer);
Assert.True(Time.WaitUntil(() => observer.StreamRunning, 2000), "Stream failed to start");
// fallback semaphore size is 5. So let 5 commands saturate that semaphore, then
// let 2 more commands go to fallback. they should get rejected by the fallback-semaphore
var fallbackSaturators = new List <Command>();
for (int i = 0; i < 5; i++)
{
fallbackSaturators.Add(CommandStreamTest.Command.From(groupKey, key, HystrixEventType.FAILURE, 0, HystrixEventType.FALLBACK_SUCCESS, 500));
}
var rejection1 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.FAILURE, 0, HystrixEventType.FALLBACK_SUCCESS, 0);
var rejection2 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.FAILURE, 0, HystrixEventType.FALLBACK_SUCCESS, 0);
var tasks = new List <Task>();
foreach (var saturator in fallbackSaturators)
{
tasks.Add(saturator.ExecuteAsync());
}
await Task.Delay(50);
output.WriteLine("ReqLog : " + HystrixRequestLog.CurrentRequestLog.GetExecutedCommandsAsString());
await Assert.ThrowsAsync <HystrixRuntimeException>(async() => await rejection1.Observe());
await Assert.ThrowsAsync <HystrixRuntimeException>(async() => await rejection2.Observe());
Task.WaitAll(tasks.ToArray());
Assert.True(WaitForLatchedObserverToUpdate(observer, 1, 2000, output), "Latch took to long to update");
Assert.Equal(2, stream.Latest.Length);
Assert.Equal(7, stream.GetLatestCount(ThreadPoolEventType.EXECUTED));
Assert.Equal(0, stream.GetLatestCount(ThreadPoolEventType.REJECTED));
}
public void TestEmptyStreamProducesZeros()
{
IHystrixCommandGroupKey groupKey = HystrixCommandGroupKeyDefault.AsKey("ThreadPool-A");
IHystrixThreadPoolKey threadPoolKey = HystrixThreadPoolKeyDefault.AsKey("ThreadPool-A");
IHystrixCommandKey key = HystrixCommandKeyDefault.AsKey("RollingCounter-A");
stream = RollingThreadPoolEventCounterStream.GetInstance(threadPoolKey, 10, 500);
stream.StartCachingStreamValuesIfUnstarted();
CountdownEvent latch = new CountdownEvent(1);
stream.Observe().Take(5).Subscribe(new LatchedObserver(output, latch));
// no writes
Assert.True(latch.Wait(10000), "CountdownEvent was not set!");
Assert.Equal(2, stream.Latest.Length);
Assert.Equal(0, stream.GetLatestCount(ThreadPoolEventType.EXECUTED) + stream.GetLatestCount(ThreadPoolEventType.REJECTED));
}
public async Task TestShortCircuited()
{
var groupKey = HystrixCommandGroupKeyDefault.AsKey("ThreadPool-G");
var threadPoolKey = HystrixThreadPoolKeyDefault.AsKey("ThreadPool-G");
var key = HystrixCommandKeyDefault.AsKey("RollingCounter-G");
var latch = new CountdownEvent(1);
var observer = new LatchedObserver(output, latch);
stream = RollingThreadPoolEventCounterStream.GetInstance(threadPoolKey, 10, 500);
latchSubscription = stream.Observe().Subscribe(observer);
Assert.True(Time.WaitUntil(() => observer.StreamRunning, 2000), "Stream failed to start");
// 3 failures in a row will trip circuit. let bucket roll once then submit 2 requests.
// should see 3 FAILUREs and 2 SHORT_CIRCUITs and each should see a FALLBACK_SUCCESS
var failure1 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.FAILURE, 0);
var failure2 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.FAILURE, 0);
var failure3 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.FAILURE, 0);
var shortCircuit1 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.SUCCESS);
var shortCircuit2 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.SUCCESS);
await failure1.Observe();
await failure2.Observe();
await failure3.Observe();
Assert.True(WaitForHealthCountToUpdate(key.Name, 500, output), "Health count stream update took to long");
await shortCircuit1.Observe();
await shortCircuit2.Observe();
Assert.True(WaitForLatchedObserverToUpdate(observer, 1, 2000, output), "Latch took to long to update");
Assert.True(shortCircuit1.IsResponseShortCircuited);
Assert.True(shortCircuit2.IsResponseShortCircuited);
// only the FAILUREs should show up in thread pool counters
Assert.Equal(2, stream.Latest.Length);
Assert.Equal(3, stream.GetLatestCount(ThreadPoolEventType.EXECUTED));
Assert.Equal(0, stream.GetLatestCount(ThreadPoolEventType.REJECTED));
}
public void ShouldReturnOneExecutedTask()
{
// given
var stream = RollingThreadPoolEventCounterStream.GetInstance(tpKey, 10, 100);
stream.StartCachingStreamValuesIfUnstarted();
var cmd = new NoOpHystrixCommand(output);
cmd.Execute();
Time.Wait(125);
ICollection <HystrixThreadPoolMetrics> instances = HystrixThreadPoolMetrics.GetInstances();
// then
Assert.Equal(1, instances.Count);
HystrixThreadPoolMetrics metrics = instances.First();
Assert.Equal(1, metrics.RollingCountThreadsExecuted);
}
public async void TestSingleFailure()
{
var groupKey = HystrixCommandGroupKeyDefault.AsKey("ThreadPool-C");
var threadPoolKey = HystrixThreadPoolKeyDefault.AsKey("ThreadPool-C");
var key = HystrixCommandKeyDefault.AsKey("RollingCounter-C");
var latch = new CountdownEvent(1);
var observer = new LatchedObserver(output, latch);
stream = RollingThreadPoolEventCounterStream.GetInstance(threadPoolKey, 10, 500);
latchSubscription = stream.Observe().Subscribe(observer);
Assert.True(Time.WaitUntil(() => observer.StreamRunning, 2000), "Stream failed to start");
var cmd = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.FAILURE, 20);
await cmd.Observe();
Assert.True(WaitForLatchedObserverToUpdate(observer, 1, 2000, output), "Latch took to long to update");
Assert.Equal(2, stream.Latest.Length);
Assert.Equal(1, stream.GetLatestCount(ThreadPoolEventType.EXECUTED));
Assert.Equal(0, stream.GetLatestCount(ThreadPoolEventType.REJECTED));
}
public async void TestSingleBadRequest()
{
IHystrixCommandGroupKey groupKey = HystrixCommandGroupKeyDefault.AsKey("ThreadPool-E");
IHystrixThreadPoolKey threadPoolKey = HystrixThreadPoolKeyDefault.AsKey("ThreadPool-E");
IHystrixCommandKey key = HystrixCommandKeyDefault.AsKey("RollingCounter-E");
CountdownEvent latch = new CountdownEvent(1);
var observer = new LatchedObserver(output, latch);
stream = RollingThreadPoolEventCounterStream.GetInstance(threadPoolKey, 10, 500);
latchSubscription = stream.Observe().Subscribe(observer);
Assert.True(Time.WaitUntil(() => observer.StreamRunning, 2000), "Stream failed to start");
Command cmd = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.BAD_REQUEST);
await Assert.ThrowsAsync <HystrixBadRequestException>(async() => await cmd.Observe());
Assert.True(WaitForLatchedObserverToUpdate(observer, 1, 2000, output), "Latch took to long to update");
Assert.Equal(2, stream.Latest.Length);
Assert.Equal(1, stream.GetLatestCount(ThreadPoolEventType.EXECUTED));
Assert.Equal(0, stream.GetLatestCount(ThreadPoolEventType.REJECTED));
}
public async Task ShouldReturnOneExecutedTask()
{
// given
var stream = RollingThreadPoolEventCounterStream.GetInstance(TpKey, 10, 100);
stream.StartCachingStreamValuesIfUnstarted();
var cmd = new NoOpHystrixCommand(output);
await cmd.ExecuteAsync();
Time.Wait(250);
var instances = HystrixThreadPoolMetrics.GetInstances();
// then
output.WriteLine($"Instance count: {instances.Count}");
Assert.Equal(1, instances.Count);
var metrics = instances.First();
output.WriteLine($"RollingCountThreadsExecuted: {metrics.RollingCountThreadsExecuted}");
Assert.Equal(1, metrics.RollingCountThreadsExecuted);
}
public void TestSingleSuccess()
{
IHystrixCommandGroupKey groupKey = HystrixCommandGroupKeyDefault.AsKey("ThreadPool-B");
IHystrixThreadPoolKey threadPoolKey = HystrixThreadPoolKeyDefault.AsKey("ThreadPool-B");
IHystrixCommandKey key = HystrixCommandKeyDefault.AsKey("RollingCounter-B");
stream = RollingThreadPoolEventCounterStream.GetInstance(threadPoolKey, 10, 500);
stream.StartCachingStreamValuesIfUnstarted();
CountdownEvent latch = new CountdownEvent(1);
stream.Observe().Take(5).Subscribe(new LatchedObserver(output, latch));
Command cmd = Command.From(groupKey, key, HystrixEventType.SUCCESS, 20);
cmd.Observe();
Assert.True(latch.Wait(10000), "CountdownEvent was not set!");
Assert.Equal(2, stream.Latest.Length);
Assert.Equal(1, stream.GetLatestCount(ThreadPoolEventType.EXECUTED));
Assert.Equal(0, stream.GetLatestCount(ThreadPoolEventType.REJECTED));
}
public void TestRequestFromCache()
{
IHystrixCommandGroupKey groupKey = HystrixCommandGroupKeyDefault.AsKey("ThreadPool-F");
IHystrixThreadPoolKey threadPoolKey = HystrixThreadPoolKeyDefault.AsKey("ThreadPool-F");
IHystrixCommandKey key = HystrixCommandKeyDefault.AsKey("RollingCounter-F");
stream = RollingThreadPoolEventCounterStream.GetInstance(threadPoolKey, 10, 500);
stream.StartCachingStreamValuesIfUnstarted();
CountdownEvent latch = new CountdownEvent(1);
stream.Observe().Take(5).Subscribe(GetSubscriber(output, latch));
CommandStreamTest.Command cmd1 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.SUCCESS, 20);
CommandStreamTest.Command cmd2 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.RESPONSE_FROM_CACHE);
CommandStreamTest.Command cmd3 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.RESPONSE_FROM_CACHE);
cmd1.Observe();
cmd2.Observe();
cmd3.Observe();
try
{
Assert.True(latch.Wait(10000));
}
catch (Exception)
{
Assert.False(true, "Interrupted ex");
}
output.WriteLine("ReqLog : " + HystrixRequestLog.CurrentRequestLog.GetExecutedCommandsAsString());
//RESPONSE_FROM_CACHE should not show up at all in thread pool counters - just the success
Assert.Equal(2, stream.Latest.Length);
Assert.Equal(1, stream.GetLatestCount(ThreadPoolEventType.EXECUTED));
Assert.Equal(0, stream.GetLatestCount(ThreadPoolEventType.REJECTED));
}
