Block Router

The block router is what manages the passing of signals from block to block. nio comes packaged with a variety of block routers and each is configurable to control behavior.

Configuration

Configuration of block routers is set in the block_router.cfg file in the project’s etc/ directory.

• clone_signals: False

• If clone_signals is True, then the block router will perform a deepcopy on the signals whenever they are split and passed to more than one block.

• max_workers: 50

• When using ThreadedPoolExecutorRouter, this is the max number of workers.

Block Router Types

Each nio project can specify a default block router in nio.conf by setting block_router.

In addition to specifying the block router for the project, each service can use its own block router by setting block_router on the service configuration.

BaseBlockRouter

Default block router.

nio.common.block.router.base.BaseBlockRouter

ThreadedBaseBlockRouter

Threaded block router.

nio.common.block.router.threaded.ThreadedBaseBlockRouter

ThreadedPoolExecutorRouter

Threaded block router that makes used of thread pools (https://docs.python.org/3/library/concurrent.futures.html).

nio.common.block.router.thread_pool_executor.ThreadedPoolExecutorRouter