forze-wiring

Forze Wiring

Use when setting up the Forze runtime, dependency registry, lifecycle, operation composition, and interface layer. For logical spec names, routes, and StrEnum wiring, see forze-specs-infrastructure. For dependency resolution, see forze-deps-consumption; for private integrations, see forze-custom-deps. For HTTP details, see forze-fastapi-interface. For day-to-day handler code, see forze-framework-usage.

For which plan enables deps, lifecycle hooks, or operation stages, see Three execution plans (DepsRegistry, LifecyclePlan, OperationRegistry).

Runtime setup

Logical specs (DocumentSpec, SearchSpec, CacheSpec, …) declare model types and name only—no DSNs, table names, collection paths, or index DDL. Deps modules (PostgresDepsModule, MongoDepsModule, RedisDepsModule, …) map that same name to physical configs (read/write relations, Redis namespaces, PostgresSearchConfig, …). DepsRegistry.from_modules(...) merges those modules so ExecutionContext resolves factories by route spec.name (for example DocumentQueryDepKey / DocumentCommandDepKey). See Specs and wiring.

Dependency registry

Pass DepsModule instances to DepsRegistry.from_modules. Each module’s __call__ returns a Deps container; the plan merges them (conflicting keys raise CoreException).

from enum import StrEnum

from forze.application.execution import DepsRegistry, ExecutionRuntime, LifecyclePlan from forze_postgres import ( PostgresClient, PostgresConfig, PostgresDepsModule, PostgresDocumentConfig, postgres_lifecycle_step, ) from forze_redis import RedisDepsModule, redis_lifecycle_step, RedisClient, RedisConfig

class ResourceName(StrEnum): PROJECTS = "projects"

class TxRoute(StrEnum): DEFAULT = "default"

postgres_client = PostgresClient() redis_client = RedisClient()

deps_registry = DepsRegistry.from_modules( PostgresDepsModule( client=postgres_client, rw_documents={ ResourceName.PROJECTS: PostgresDocumentConfig( read=("public", "projects"), write=("public", "projects"), bookkeeping_strategy="database", ), }, tx={TxRoute.DEFAULT}, ), RedisDepsModule( client=redis_client, caches={ResourceName.PROJECTS: {"namespace": "app:projects"}}, ), )

Alternatively, a single callable module may return `Deps.merge(...)` — see [Getting started](https://morzecrew.github.io/forze/get-started/quickstart/).

Merge optional integration modules the same way — for example `TenancyDepsModule` from `forze_identity.tenancy.execution` registers `TenantResolverDepKey` / `TenantManagementDepKey` routes for document-backed tenant resolution (see [Multi-tenancy](https://morzecrew.github.io/forze/in-depth/multi-tenancy/)):

```python
from forze_identity.tenancy.execution import TenancyDepsModule

deps_registry = DepsRegistry.from_modules(
    PostgresDepsModule(...),
    TenancyDepsModule(tenant_resolver={"main"}),
)

Lifecycle plan

Manages startup/shutdown of connection pools. Use LifecyclePlan.from_modules(...) for integration modules (for example PostgresLifecycleModule) or from_steps(...) for individual factories. Call freeze() to build topological waves using requires / provides / depends_on on each LifecycleStep, then pass the frozen plan to ExecutionRuntime. Use with_concurrent() when independent steps in the same wave may start in parallel.

from forze_postgres import PostgresLifecycleModule

lifecycle_plan = LifecyclePlan.from_modules(
    PostgresLifecycleModule(
        client=pg,
        dsn="postgresql://app:app@localhost:5432/app",
        config=PostgresConfig(min_size=2, max_size=15),
    ),
).with_steps(
    redis_lifecycle_step(
        dsn="redis://localhost:6379/0",
        config=RedisConfig(max_size=20),
    ),
)

Execution runtime

runtime = ExecutionRuntime(
    deps=deps_registry.freeze(),
    lifecycle=lifecycle_plan.freeze(),
)

Run work inside runtime.scope():

async with runtime.scope():
    ctx = runtime.get_context()

build_runtime(*modules, lifecycle_modules=, lifecycle_steps=, ...) (from forze.application.execution) assembles the same thing in one call — it freezes both plans for you. Production knobs live there too: drain_timeout= (graceful drain window on shutdown, default 10s) and deployment=DeploymentProfile.FLEET (fails assembly for unguarded shared-state-mutating lifecycle steps when running N replicas; guard them with forze_kits.lifecycle.singleton_lifecycle_step). See forze-resilience-deadlines.

Document composition

Registry and transaction plan

build_document_registry registers standard CRUD handlers. Transactions are not implicit — bind a transaction route on write operations, then freeze before HTTP attach:

from forze_kits.aggregates.document import (
    DocumentDTOs,
    DocumentKernelOp,
    build_document_registry,
)

project_dtos = DocumentDTOs(
    read=ProjectReadModel,
    create=CreateProjectCmd,
    update=UpdateProjectCmd,
)

write_ops = [
    project_spec.default_namespace.key(op)
    for op in (
        DocumentKernelOp.CREATE,
        DocumentKernelOp.UPDATE,
        DocumentKernelOp.DELETE,
        DocumentKernelOp.KILL,
        DocumentKernelOp.RESTORE,
    )
]

registry = (
    build_document_registry(project_spec, project_dtos)
    .bind(*write_ops)
    .bind_tx()
    .set_route("default")
    .finish(deep=True)
    .freeze()
)

Custom handlers and stage hooks

from forze.application.contracts.execution import BeforeStep
from forze_kits.aggregates.document import DocumentKernelOp

create_op = project_spec.default_namespace.key(DocumentKernelOp.CREATE)


def auth_before_factory(ctx):
    async def _before(args):
        if not is_authorized(ctx):
            raise PermissionError("Not authorized")
    return _before


registry = (
    build_document_registry(project_spec, project_dtos)
    .bind(create_op)
    .bind_tx()
    .set_route("default")
    .finish(deep=False)
    .bind_outer()
    .before(BeforeStep(id="auth", factory=auth_before_factory, priority=100))
    .finish(deep=True)
    .freeze()
)

Custom operations use explicit operation keys on the same registry:

archive_op = project_spec.default_namespace.key("archive")

registry = build_document_registry(project_spec, project_dtos)
registry = registry.set_handler(
    archive_op,
    lambda ctx: ArchiveProject(doc=ctx.document.command(project_spec)),
)
registry = (
    registry.bind(archive_op)
    .bind_tx()
    .set_route("default")
    .finish(deep=True)
    .freeze()
)

Stage order

Outer before / wrap / on_success / on_failure / finally_, then optional transaction scope (tx_before, handler, transactional on_success, after_commit, dispatch_after_commit). Higher priority runs first within the same stage. See Middleware and plans.

Cross-cutting patches

registry.patch(selector) applies a plan default (route, deadline, hook) to every operation a selector matches. Patches are late-bound — resolved at freeze() against the full key set. Across OperationRegistry.merge(...) the cross-registry reach is fail-closed: if a patch from one part matches another part's operations, merge raises naming the selectors and ops. Resolve it by scoping the patch (patch(selector, namespace=ns) — matches only ops under ns), folding it into per-operation plans first (registry.materialize_patches()), or allowing it explicitly (merge(..., cross_registry=True)). A policy patch applied after the merge never travels through merge. A live patch is "apply wherever this lands"; a materialized one is "settled here." See Middleware and plans.

FastAPI integration

Context dependency

def context_dependency():
    return runtime.get_context()

Endpoints

Note: the former forze_fastapi.endpoints.* router helpers (attach_document_endpoints, attach_search_endpoints, attach_http_endpoint, …) have been removed. Their replacement is forze_fastapi.routes (attach_document_routes, attach_search_routes, attach_storage_routes), which generates routes from a frozen operation registry — see forze-fastapi-interface. You can also define your own FastAPI routes that resolve a context with the dependency above, dispatch through your operation registry / facade (see Search composition), and return the result. Use SecurityContextMiddleware for identity binding and register_exception_handlers(app) for error mapping (see forze-auth-tenancy-secrets and forze-observability-errors).

from fastapi import APIRouter

router = APIRouter(prefix="/projects", tags=["projects"])


@router.get("/{project_id}")
async def get_project(project_id: UUID, ctx=Depends(context_dependency)):
    return await ctx.document.query(project_spec).get(project_id)


app.include_router(router)

Lifespan with runtime scope

from contextlib import asynccontextmanager

from fastapi import FastAPI


@asynccontextmanager
async def lifespan(app: FastAPI):
    async with runtime.scope():
        yield


app = FastAPI(lifespan=lifespan)

Mapping steps

Inject computed fields (e.g. number_id, creator_id) before the handler runs:

from forze_kits.aggregates.document import DocumentMappers, build_document_registry
from forze_kits.domain.creator_id import CreatorIdMappingStepFactory
from forze_kits.domain.number_id import NumberIdMappingStepFactory
from forze_kits.mapping import PydanticPipelineMapperFactory

create_mapper = PydanticPipelineMapperFactory(
    in_=CreateProjectRequest,
    out=CreateProjectCmd,
    step_factories=(
        NumberIdMappingStepFactory(spec=project_counter_spec),
        CreatorIdMappingStepFactory(),  # configured per your identity resolver
    ),
)

registry = build_document_registry(
    project_spec,
    project_dtos,
    DocumentMappers(create=create_mapper),
).freeze()

See forze-domain-aggregates and the mapping reference for step configuration.

Testing with Mock

In-memory adapters — no external services:

from forze.application.execution import DepsRegistry, ExecutionRuntime
from forze_mock import MockDepsModule

mock_module = MockDepsModule()
runtime = ExecutionRuntime(deps=DepsRegistry.from_modules(mock_module).freeze())

async with runtime.scope():
    ctx = runtime.get_context()
    doc_q = ctx.document.query(project_spec)
    result = await doc_q.get(some_uuid)

Search composition

from forze_kits.aggregates.search import SearchFacade, SearchRequestDTO, build_search_registry

search_registry = build_search_registry(project_search_spec).freeze()

facade = SearchFacade(
    ctx=ctx,
    registry=search_registry,
    namespace=project_search_spec.default_namespace,
)
result = await facade.search(SearchRequestDTO(query="roadmap", limit=20))

Transactional notifications

from forze.application.contracts.outbox import OutboxDestination, OutboxSpec
from forze_kits.integrations.outbox import outbox_flush_tx_on_success_factory, relay_outbox_to_queue
from forze_kits.integrations.notify import EmailNotification, NotificationRouter, process_notification_message

events_spec = OutboxSpec(
    name="events",
    codec=...,
    destination=OutboxDestination.queue(route="notifications", channel="notifications"),
)
router = NotificationRouter()
router.register("project.created", lambda e: [EmailNotification(...)])
# stage in handler; flush via outbox_flush_tx_on_success_factory; relay; worker calls process_notification_message

See Transactional notifications.

Anti-patterns

1. Hand-building Deps for production — prefer DepsRegistry.from_modules and integration modules.
2. Skipping lifecycle — real adapters need pools started/stopped.
3. get_context() outside runtime.scope() — raises RuntimeError.
4. Missing ctx_dep on FastAPI routers — each request needs a context from the active scope.
5. Attaching HTTP routes without .freeze() — call .freeze() after bind_tx().set_route(...).finish(...) on operation registries, and on deps/lifecycle plans before ExecutionRuntime.
6. Duplicating literal route strings — use shared StrEnum values for spec names and transaction routes.

Reference

• Getting started
• Operation composition
• Composition reference
• FastAPI integration
• Mock integration