public void TestMultipleEventsOverTimeGetStoredAndAgeOut()
{
IHystrixCommandGroupKey groupKey = HystrixCommandGroupKeyDefault.AsKey("ThreadPool-M");
IHystrixThreadPoolKey threadPoolKey = HystrixThreadPoolKeyDefault.AsKey("ThreadPool-M");
IHystrixCommandKey key = HystrixCommandKeyDefault.AsKey("RollingCounter-M");
stream = RollingThreadPoolEventCounterStream.GetInstance(threadPoolKey, 10, 250);
stream.StartCachingStreamValuesIfUnstarted();
// by doing a take(20), we ensure that all rolling counts go back to 0
CountdownEvent latch = new CountdownEvent(1);
stream.Observe().Take(20).Subscribe(GetSubscriber(output, latch));
CommandStreamTest.Command cmd1 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.SUCCESS, 20);
CommandStreamTest.Command cmd2 = CommandStreamTest.Command.From(groupKey, key, HystrixEventType.FAILURE, 10);
cmd1.Observe();
cmd2.Observe();
try
{
Assert.True(latch.Wait(10000));
}
catch (Exception)
{
Assert.False(true, "Interrupted ex");
}
// 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 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(GetSubscriber(output, latch));
// no writes
try
{
Assert.True(latch.Wait(10000));
}
catch (Exception)
{
Assert.False(true, "Interrupted ex");
}
Assert.Equal(2, stream.Latest.Length);
Assert.Equal(0, stream.GetLatestCount(ThreadPoolEventType.EXECUTED) + stream.GetLatestCount(ThreadPoolEventType.REJECTED));
}
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 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 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(new LatchedObserver(output, latch));
Command cmd1 = Command.From(groupKey, key, HystrixEventType.SUCCESS, 20);
Command cmd2 = Command.From(groupKey, key, HystrixEventType.RESPONSE_FROM_CACHE);
Command cmd3 = Command.From(groupKey, key, HystrixEventType.RESPONSE_FROM_CACHE);
cmd1.Observe();
cmd2.Observe();
cmd3.Observe();
Assert.True(latch.Wait(10000), "CountdownEvent was not set!");
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));
}
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));
}
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 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));
}