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qsl

  • sl - Standard library - common frame for all ec q scripts

    • loading configurations and libraries
    • managing library paths and dependencies
    • automatically load logging, events and protected evaluation libraries
    • framing for q scripts

  • pe - Protected evaluation library - wrapper for invoking functions in protected evaluation

    • handling both anonymous and named functions
    • signal handler can be defined by user
    • can be turned on and off during runtime
    • extended log messaging (e.g. function name, args etc.)

  • event - Event library - execution of q functions as events

    • function is executed using protected evaluation
    • detailed information about event state is logged using .log.xxx interface - levels can be defined via event API; information is logged using dictionary format (key=value pairs)
    • information about event state is transferred to the monitor server using event files
    • detailed information about event is persisted in event files (the same information as event log message)
    • function execution time is measured

  • callback - Callback library - managing callbacks

    • allows adding multiple callbacks under one interface name (e.g. .z.pg, .z.ps, .z.exit, etc.)
    • counts number of executions of each callback
    • allows flag 'execute as last one'

  • timer - Timer library - abstraction layer for timer

    • allows execution of multiple different timers
    • runs a function every number of timer ticks provided per parameter
    • runs the specified function around specified time (10s accuracy)

  • handle - Connection management library - abstraction layer for interprocess connections

    • initialization and maintaining connections between q processes
    • using logical components names (host/port/password read from config files)
    • two modes of connection initialization - lazy and eager
    • keeping state of each connection (registered, open, close, lost, `failed)
    • user defined callbacks on port-open and port-close
    • autoreconnection functionality

  • authorization - Authorization library - access restrictions and auditing

    • providing authorization by validating incoming function calls against allowed namespaces and forbidden keywords (stop words);
    • authorization configuration is described in access.cfg schema file
    • logging access and function calls facilities (audit view)
    • logging of incoming synchronous and asynchronous function calls and user login/logout;
    • audit view configuration is described in access.cfg schema file (see <access.qsd>)

  • u - u.q library - extension of u.q from Kx

    • provides API for subscription to data publishing in tickHF protocol
    • maintains subscription lists
    • end-of-day callback to all subribers

  • sub - Subscription management library - abstraction for realtime data subscription

    • allows subscription to one of the for subscription to data published in tickHF, tickLF or protocols
    • subscribe and replay the data
    • keep subscription status

  • store - Store library - data storage in the hdb

    • data storage as splayed and partition table
    • callback for reloading and filling missing tables in hdb
    • end of day support and integration with eodMng component

  • os - Os library - shell commands abstraction, covers Linux, MacOS and Windows

    • directory operations - .os.mkdir, .os.cpdir, .os.rmdir
    • files operations - .os.rm, .os.move
    • find files by age and pattern - .os.find
    • compress file or directory - .os.compress
    • sleep for given number of milliseconds - .os.sleep

  • parseq - Parseq library - Parseq is a Q clone of the Haskell's Parsec, a parser combinator library.

    • Most parser names are the same as in the original, except when colliding with q keywords.

  • tabs - Tabs library - data model validation facilities

    • validation of the data model

  • doc - Documentation loader library - access to the doc-string documentation from the source code

    • extract doc-strings from the q source files
    • documentation browsing - .doc.list
    • searching functionality - .doc.find
    • displaying detailed function description - .doc.show