reactors | A foundational framework for distributed programming | Reactive Programming library

I have a line graph that I'm plotting in python. The last thing that I need to do is add a line telling it to color a section of the graph red if the slope is greater that 25. How would I do this?

Here's what I have so far.

I just upgraded a Spring Boot application that uses Spring Cloud Stream Kafka producers and consumers to

How can add a new product after the user chooses the type of product that was displayed in (select option) thymeleaf and save product. I'm Tried this code:

so I'm making a bot in discord.py, and I've stumbled on a problem.

Here's my code:

I have a python code (example from Cantera.org) that uses scipy.integrate.ode to solve a system of ODE. The code works fine and the results are reasnoable. However, I noticed something about the ode solver that does not make sense to me.

I have a put a print function inside (print("t inside ODE function", t)) the function the calculates the derivative vector (__call__(self, t, y)), and outside that function in the while loop (print("t outside ODE function", solver.t);). I expect that inside print has to be called when the solver does the time integration, and then the outside print is called. In other words, two "t outside ODE function" cannot appear right after another without "t inside ODE function" in between. However, this occurs in some of iterations in the while loop, which mean the solver does the integration without calculating the derivatives.

I am wondering how this is possible

In my Spring Boot WebFlux application, I am using Reactor. I have set spring.sleuth.reactor.instrumentation-type=manual and am using @ContinueSpan on a service method. I see from the code that the span is created, started and ended appropriately in a reactive way.

Later, in the Flux I need to extract the trace information.

The code I am using injects Tracer and I use Tracer.currentSpan().context() to try to get to the trace context. I can successfully get the currentSpan() until I hit a call to an R2DBC repository method, after which the currentSpan is null. I can make the span "current" by annotating the repository method, but I do not want to do that unless it's necessary. I'd like to understand the underlying "problem".

I have also looked at CurrentTraceContext in the Reactor Subscription Context and see that it answers as Tracer does. Supporting both seems to be a threadlocal-ly supported trace context.

Oddly, if I look at TraceContext in the Subscriber context, the trace, parent, and span ids are there. It appears that WebFluxSleuthOperators.currentTraceContext(Context...) does this - so I have to believe that this is the appropriate vehicle for obtaining the trace context.

So, a few questions:

1. Is WebFluxSleuthOperators.currentTraceContext(Context...) [TraceContext in the Reactor Subscription context] the proper way to get the up-to-date trace context?

2. Looking at ReactorSleuthMethodInvocationProcessor, a reference to the current span and trace context are given to the SpanSubscriber which puts them in the Subscriber context. As mentioned earlier, subscribe() and next() are invoked within the context of that span. Why would a method such as a call to a r2dbc repository method effectively "erase" the tracer.currentSpan() but leave the trace context alone?

I'd love to understand this a bit more deeply and will look at the source more. But any insight right now is greatly appreciated. Thank you very much in advance.

I'm currently researching the resilience4j library and for some reason the following code doesn't work as expected:

I have been trying to install python-binance for Python 3.9.1 through visual studio code.

When installing with pip install, I get errors in red font!

How could I solve this problem?

the appeared part of error messages :

Basically, I'm trying to collect everyone who reacted to a certain message into a list so I could see who was coming to an event. I know I could just look at everyone who reacted manually but I would like to expand on this later when I get the time.

My plan was to add 2 separate commands, one being the command to start the reaction and the other one was to state everyone who reacted (list). But so far I'm just stuck with this single command which doesn't work. Any tips on how I could rework this into the 2 commands?

Anyway, so far I have this.