sbf | A low latency middleware written in C | Pub Sub library
kandi X-RAY | sbf Summary
kandi X-RAY | sbf Summary
SBF gives publish/subscribe and request/reply messaging semantics in addition to core networking libraries and common utils (queues, timers and event handling) to build applications. The library uses async callback idiom to deliver messages/events/timers etc. The core event engine is provided by the open source library libevent. For messaging a choice of TCP or UDP multicast can be used depending on the use case of the application. UDP multicast is better if there is a one to many publish/subscribe topology. For publish/subscribe a topic is created and one or many publishers can publish messages on the topic and one or many subscribers can listen for messages on that topic. For request/reply, a publisher sends a single request on a topic and one or more subscribers can send a reply to that specific request for the specific publisher. SBF is brokerless and uses a deterministic addressing scheme for topic resolution.
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sbf Examples and Code Snippets
Lines of Code : 46License : Permissive (MIT)
Copy// Initialise the logging system
log = sbfLog_create (NULL, "%s", "");
sbfLog_setLevel (log, SBF_LOG_OFF);
// Initialise the middleware by defining some properties like the handler
// (e.g. tcp, udp) and the connection interface (e.g. eth0).
proper $ git submodule update --init --recursive
$ mkdir build
$ cd build
$ cmake ../
$ make install
Community Discussions
Trending Discussions on sbf
QUESTION
To give more context about my problem:
I am using python to build an API connecting to the TWS of interactive brokers. I managed to build something functional and able to fetch live data from contracts using the methods given in the doc of IB. Now that I want to use all the data to build other parallel systems with it, I have encounter problems organising the data that arrives from the IB server.
My program loops a list of 30 symbols to get live data from and then I want to put the data (ex. 'HIGH', 'LOW', 'CLOSE', 'VWAP' etc) from each symbol all together in one dataframe to calculate indicators and from there come up with an alert system that is based on them indicators.
This objective I have already accomplished it using only one symbol for the whole program. Is easy to store the data in instances or variables, pass it to a DataFrame and then calculate to set up alerts.
Now when looping a list of 30 values and receiving the data of all of them I have struggled trying to store the data for each symbol together and then calculate and set up alerts. Specially when I have to use several methods to receive the data (ex. I use tickPrice for some data and tickString for some other data) this several methods execute themselves one after the other but they wont necessarily have all the data at the same time, some values take more time than others to show.
I will show an example of my code to give even more context of my objective:
This is my EWrapper class:
...ANSWER
Answered 2022-Feb-26 at 12:14It's easy to create a Pandas dataframe from a Python dictionary that contains lists. For example, the following code creates a dictionary containing ticker symbols, bid prices, and ask prices:
QUESTION
In addition to what I did here:
Loop Through excel file using Powershell
I want to send a mail with only the files that are transfered, and I got a small problem with that. To do that and foreach file transfered I added the file to a variable $FilenameFR with the script below.
Here is what I tried
...ANSWER
Answered 2021-Sep-02 at 09:29Assuming your variable $F has the filename for each iteration and variable $FR is set to zero before the major loop, you do not want to add the filenames with += to an (up to then) undefined variable.
Instead, capture the filenames as string array and join these later with newlines in the email.
QUESTION
The source xml is:
...ANSWER
Answered 2021-Aug-27 at 09:38It seems, this time you can just match on the elements that interest you:
QUESTION
Given the following code:
https://xsltfiddle.liberty-development.net/pNEj9dR
i have not managed to get as output the parentheses i need around each variable. Iitry with: ({sbf[@cd = 'a']})
The above will output () whenever {sbf[@cd = 'a']} does not exist. Desired output:
...ANSWER
Answered 2021-Aug-25 at 22:14The previous answer already showed you to output some characters only when your data exists by using it at the right side of the map operator !: {sbf[@cd = 'a']!('(',.,')')}. That might introduce spaces so perhaps you rather want {sbf[@cd = 'a']!('(' || . || ')')}.
QUESTION
input xml
...ANSWER
Answered 2021-Aug-24 at 07:50If you use
QUESTION
Christoph Kolumbus
John Diter
Julie Nat
Darius Milhaud
Erich kleiber
Franz Ludwig Horth
Christoph Kolumbus
Serg
Mak
DarMil
Erikl
LudHorth
Chris Prante
"Chris Dietz"
ANSWER
Answered 2021-Aug-23 at 12:30It is kind of hard to cater for all options of missing or existing items, perhaps the following helps as it outputs certain separators only if the item itself exists; nevertheless I haven't got the exact output, hopefully you can adjust the code to your needs:
QUESTION
I'm a beginner in Powershell, and I have a code that loop through PDF files get all their names. Then loop in an excel file for a match if true give the name of the site. here is a sample of my PDF Files, Excel File and Code explained, if you need any other explanation please tell me :
I get all Files Name here ...ANSWER
Answered 2021-Aug-06 at 15:41_ is a valid character for variable names, so $SBF is getting set incorrectly on this line:
QUESTION
I want to open a binary file (yes, another soft synth soundbank) in ASCII format and check if it contains a string or not. There are multiple files in the folder, but I have written the appropriate code for it, I just want it to search the file for a substring.
I've tried opening the same format using the ASCII encoding function before, but it does not display the data I want (it displays some garbled data, totally different from what it does in a hex editor, in which the file is opened in ASCII). Can someone point me in the right direction?
EDIT: As asked below, here is the new code I'm using:
...ANSWER
Answered 2021-Apr-24 at 22:18Does the following do what you want? It should handle non-UTF-8 characters by displaying a tofu box instead of throwing a decoding error.
QUESTION
I'm trying to create a more general endpoint for handling upload files. This endpoint will check the file and based on the file's type will redirect to a specific endpoint (dedicated for a specific file type upload). To test this idea, on the client side(reactJS) I enabled redirect: 'follow' on fetch and on the flask side, I added HTTP code 307 to preserve the request. I used the browser to access the path (using GET), the redirect works. but when using the react app, the fetch seems that doesn't follow the redirect, because the app receives the 307 from the provided endpoint but doesn't receive the 200 code from the redirect.
Server log:
...ANSWER
Answered 2021-Apr-09 at 15:14[SOLUTION]
A solution that works, in this case, is calling the function directly on the main endpoint instead of using a redirect to the related endpoint. The request and form-data is also reachable without the need of passing as function arguments.
QUESTION
in this text file there are some links. I am trying to create a script that allows me to print all links (I have put all links in bold for you to understand). The output should be all links below one another.
Thanks a lot for your answers.
...ANSWER
Answered 2020-Nov-03 at 14:33First, you need to show your script and we can help you.
You can use something like:
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