python-dependency-injector/examples/providers/abstract_factory/example.py

"""`AbstractFactory` providers example."""

import cache

import dependency_injector.providers as providers


# Define abstract cache client factory:
cache_client_factory = providers.AbstractFactory(cache.AbstractCacheClient)

if __name__ == '__main__':
    # Override abstract factory with redis client factory:
    cache_client_factory.override(providers.Factory(cache.RedisCacheClient,
                                                    host='localhost',
                                                    port=6379,
                                                    db=0))
    redis_cache = cache_client_factory()
    print(redis_cache)  # <cache.RedisCacheClient object at 0x10975bc50>

    # Override abstract factory with memcache client factory:
    cache_client_factory.override(providers.Factory(cache.MemcacheCacheClient,
                                                    hosts=['10.0.1.1',
                                                           '10.0.1.2',
                                                           '10.0.1.3'],
                                                    port=11211,
                                                    prefix='my_app'))
    memcache_cache = cache_client_factory()
    print(memcache_cache)  # <cache.MemcacheCacheClient object at 0x10975bc90>