Source code help

BM-2cWy7cvHoq3f1rYMerRJp8PT653jjSuEdY
Mar 7 01:42 [raw]

Hi Peter, devs, Can someone please explain the difference between the variables in shared.py and those in state.py, and help to clarify for example why state.curses and state.maximumNumberOfHalfOpenConnections (shared configuration parameters set once on startup) are defined in state.py, while shared.connectedHostsList or shared.ackdataForWhichImWatching (purely runtime state variables) are defined in shared.py ? Also as a follow-up, if a fellow coder wanted to introduce a new set-once-on-startup global variable affecting the operation of the client (fictional example: a CLI switch --ignore-ttl to force the object processor to temporarily ignore TTLs in order to replay older streams), where would that variable be defined: shared or state? I think it's shared, but could use some educated advice. Thank you.

BM-2cWy7cvHoq3f1rYMerRJp8PT653jjSuEdY
Mar 7 06:30 [raw]

Peter is in process of deprecating shared.py. So use defaults.py, paths.py, protocol.py, queues.py, state.py or add a new module, whatever is appropriate.

BM-2cWy7cvHoq3f1rYMerRJp8PT653jjSuEdY
Mar 7 12:04 [raw]

this is the type of confusing bullshit that happens when you use classes and object oriented "programming." functional code would be 10x ++ easier to follow and parse. When I read the BM codebase, I have to jump back and forth between many files and classes just to see what one thing is doing. I think feds promoted object oriented programming because of the huge attack surface that evolves from it and the internal state of classes all over. you can use python to do functional programming and put each function in a file by that name. then debugging anything is just about instant.

BM-2cWy7cvHoq3f1rYMerRJp8PT653jjSuEdY
Mar 7 18:39 [raw]

> Hi Peter, devs, > > Can someone please explain the difference between the variables in > shared.py and those in state.py In the past, shared.py contained both some methods and global variables, which caused problems. I moved some variables to newly created state.py as a workaround but it was never properly finished. Ideally, the methods will be moved elsewhere and shared.py will be used for global variables. I also partially did that one, some methods were moved to helper_something and protocol.py, but they haven't been removed yet from shared.py. I kind of stopped once it unbroke as there are zillions of other things to fix. > and help to clarify for example why > state.curses and state.maximumNumberOfHalfOpenConnections (shared > configuration parameters set once on startup) are defined in > state.py, while shared.connectedHostsList or > shared.ackdataForWhichImWatching (purely runtime state variables) > are defined in shared.py ? Probably my unfinished attempts to work around problems. One of those duplicate variables should be scrapped, possibly even both and a better approach chosen. > Also as a follow-up, if a fellow coder wanted to introduce a new > set-once-on-startup global variable affecting the operation of the > client (fictional example: a CLI switch --ignore-ttl to force the > object processor to temporarily ignore TTLs in order to replay older > streams), where would that variable be defined: shared or state? At the moment state.py is safer, things may break if you try to do it in shared.py. > I think it's shared, but could use some educated advice. See above. PS. I'm in the process of hiring developer(s) to fix all this crap as I am overloaded with all the stuff around the project. > Thank you. Cheers, Peter

BM-2cWy7cvHoq3f1rYMerRJp8PT653jjSuEdY
Mar 7 18:45 [raw]

Yes, you're right, I forgot about it in my previous post, some parts were moved to defaults.py (constants), queues.py (global queues), paths.py (that's kind of specific to deployment internals), state.py (stuff that screwed up importing shared.py), and some things which are closely related to a specific subsystem were moved to the classes where that subsystem is used. It really needs to be properly refactored as originally it was a broken mess, now it is a distributed mess with occasional duplicates. Peter Surda Bitmessage core developer

BM-2cWy7cvHoq3f1rYMerRJp8PT653jjSuEdY
Mar 7 18:53 [raw]

I think you can make unreadable code with both approaches, and readable code as well. I think classes make more sense in some cases and functional programming in other cases. Regarding PyBM I don't think the existenence of classes is what's making it less readable, in fact I think in some places we need more OOP. Peter Surda Bitmessage core developer

BM-2cWy7cvHoq3f1rYMerRJp8PT653jjSuEdY
Mar 8 03:20 [raw]

Thanks everyone for the clarifications. Can I suggest putting a one-line deprecation notice at the top of deprecated files? It would help the understanding and, since it's not code, there's no regression risk.

BM-2cWy7cvHoq3f1rYMerRJp8PT653jjSuEdY
Mar 11 22:43 [raw]

I can't agree with you because state is an ugly thing and the cause of much pain and agony, but I also can't recommend straying too far from OOP here. Pretty much every source you can find about FP in python will more or less tell you not to, since the language is a *lot* more suited for OOP--Guido made it that way. It makes sense to a degree because Python has a strong focus on user friendliness and OOP is (unfortunately) already familiar to most people. The best way to go functional would be to write another version in Haskell or Scala or something.

BM-2cWy7cvHoq3f1rYMerRJp8PT653jjSuEdY
Mar 12 17:12 [raw]

> The best way to go functional would be to write another version in Haskell or Scala or something. a worthwhile suggestion. would we add to the pain of portability? is scala running on standard JVM yet?

BM-2cWy7cvHoq3f1rYMerRJp8PT653jjSuEdY
Mar 13 03:07 [raw]

> is scala running on standard JVM yet? Scala compiles directly to Java bytecode, so yes. Anywhere a JVM runs, scala runs. There are *some* obnixious bits (for example tail recursion is not always possible), and the fact that FP is not enforced, but the benefit that interop gives is undenyable. There are other JVM languages with partial or full FP properties: Groovy (eh), Kotlin ( less eh), Clojure (kinky), and Scala (help im lost deep in the typesystem jungle) at least. But There are a *lot* to choose from for FP. Here are some comaparisions (note not all of them are functional languages): https://en.wikipedia.org/wiki/Functional_programming#Coding_styles

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BM-2cWy7cvHoq3f1rYMerRJp8PT653jjSuEdY

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