GNU Rapid Application Coding Environment (GRACE)

Introduction

The grace library is a C++ toolkit for creating stable Unix services with strong multithreading, messaging, connectivity and data exchange with other programs.

GRACE Classes

Data containers

• Quick passing of objects by pointer: memory::retainable
• String container: string
• Static key string container: statstring
• Date container: timestamp
• Dynamic array template: array array
• Indexed array template: dictionary dictionary
• Structured storage: value

Data translation

• Extra string manipulation and processing: strutil
• XML input and output translation: xmlschema
• Rich data validation: validator

Input/Output classes

• Filesystem abstraction with alias-paths: filesystem
• File-based i/o blocking/non-blocking: file
• TCP socket: tcpsocket
• TCP socket with client SSL encoding: sslsocket
• TCP listening socket: tcplistener
• SMTP socket: smtpsocket
• HTTP socket: httpsocket
• HTTPS socket: httpssocket
• HTTP daemon: httpd
• VT100 terminal buffer: termbuffer
• VT100 command line interface: terminal
• VT100 command line parser: cli

Task Management

• Forked background task: process
• Background system task with a pipe: systemprocess
• POSIX thread with message queue: thread
• POSIX read/write lock: lock lock
• POSIX conditional: conditional
• Collection of POSIX worker threads with message queue:
  • groupthread
  • threadgroup

Application Design

• Command line app with argument parsing: application
• CGI-spec app with variable parsing: cgi
• Unix background process with logging: daemon
• Configuration and change control: configdb configdb

Macros:

• foreach (node, collection) { ... } implemented through the visitor visitor protocol.
• caseselector (object) { ... } works on any native or object type that understands operator==.
• exclusivesection (lockedobject) {...}, sharedsection (lockedobject) {...}, breaksection {...} and unprotected (lockedobject) {...} all need a lock lock object.