ConnectionProvider Module Introduction

The ConnectionProvider module provides an API for providing pluggable network connections objects to Qore. This module can also be used to provide URL strings from identifiers from registered connection providers as well.

To use this module, use "%requires ConnectionProvider" in your code.

All the public symbols in the module are defined in the ConnectionProvider namespace.

Class:

AbstractConnection

Hashdecls:

Functions:

Connection Provider Modules

This module uses the "QORE_CONNECTION_PROVIDERS" environment variable to load connection provider modules. Each connection provider module must provide two public functions with the following signatures:

# returns a ConnectionProvider::AbstractConnection object for the given identifier or throws an exception
public ConnectionProvider::AbstractConnection sub get_mod_connection(string str) {}
# returns a hash keyed by connection identifiers with values as ConnectionProvider::AbstractConnection objects for all connections known to the connection provider
public *hash sub get_mod_connections() {}

Connection provider modules declared in the "QORE_CONNECTION_PROVIDERS" environment variable must be separated by the platform-specific PathSep character as in the following examples:

Unix Example

export QORE_CONNECTION_PROVIDERS=MyConnectionProvider:OtherConnectionProvider

Windows CMD.EXE Example

set QORE_CONNECTION_PROVIDERS=MyConnectionProvider;OtherConnectionProvider

Windows PowerShell Example

$env:QORE_CONNECTION_PROVIDERS="MyConnectionProvider;OtherConnectionProvider"

Release Notes

ConnectionProvider 1.2

the AbstractConnection::consructor() refactoring
all connection clases have unified constructor
old contructors and static make() constructors are deprecated
ConnectionProvider::AbstractConnection::parseUrl() is introduced
ConnectionProvider::AbstractConnection::getSafeurl() is not static anymore
it allows their reimplementation in the inherited class. It can be used to parse strange and unexpected URLs like eg. pure json strings, or Datasource connection strings.

ConnectionProvider 1.1

the AbstractConnection::getConstructorInfo() method (and supporting declarations) was added to allow connections to be created dynamically, potentially in another process from a network call (issue 2628)

ConnectionProvider 1.0.1

removed unnecessary serialization from AbstractConnection::get() (issue 2880)

ConnectionProvider 1.0

the initial version of the ConnectionProvider module

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