How can I add a restriction like clients can't add elements to Redis List if size of the redis list is greater than number? -

-

my use case redis client should not allowed add new elements in redis list if size of redis list greater number. basically, want make bounded list.

i can 2 redis commands. first, execute llen command length of list , allowed add element if length not maxed.

can using 1 command (atomic operation) instead of two?


Comments

Post a Comment

Popular posts from this blog

ZeroMQ on Windows, with Qt Creator -

-
i have installed zmq link given below on windows 7. http://zeromq.org/distro:microsoft-windows 1) have c++ project in qt-creator , i'm using zmq c++ binding (zhelpers.hpp etc). 2) have added .lib installed zmq folder qtcreator 3) while compiling, compiler looks _imp__zmq_verion, in .dll files present in .lib have __imp_zmq_version. 4) causing undefined reference zmq_version. anyone else faced problem , has solution ?
Read more

unity3d - Unity SceneManager.LoadScene quits application -

-
i have 2 different scenes 1 named 'main' , other 'game' both added scenes in load. when use scenemanager.loadscene("game"); works no problem when tried return main scene code if (input.getkeydown (keycode.escape)) { scenemanager.loadscene("main"); } strangely game quits. thanks. sorry interruption. somewhere on other script found code. if (input.getkeydown (keycode.escape)) { application.quit (); } that's bad, know...
Read more

python - Error while using APScheduler: 'NoneType' object has no attribute 'now' -

-
i have python app hosting on heroku. use apscheduler call function every day @ time. strange thing 1 time function runs after while have following error log: exception in thread apscheduler (most raised during interpreter shutdown): 2017-09-06t15:03:28.347848+00:00 app[web.1]: traceback (most recent call last): 2017-09-06t15:03:28.347858+00:00 app[web.1]: file "/app/.heroku/python/lib/python2.7/threading.py", line 810, in __bootstrap_inner 2017-09-06t15:03:28.347859+00:00 app[web.1]: file "/app/.heroku/python/lib/python2.7/threading.py", line 763, in run 2017-09-06t15:03:28.347861+00:00 app[web.1]: file "/app/.heroku/python/lib/python2.7/site-packages/apscheduler/schedulers/blocking.py", line 27, in _main_loop 2017-09-06t15:03:28.348167+00:00 app[web.1]: <type 'exceptions.attributeerror'>: 'nonetype' object has no attribute 'now' any guesses? the full code long here key parts: def startdayauto(): global ...
Read more