Class: QueriesPlugin

Defined in: src/wirestate-core/plugin/queries/queries-plugin.ts:28

Enables query messaging on a container.

Remarks

Register it (new Container({ plugins: [new QueriesPlugin()] })) to bind the QueryBus and wire @OnQuery handlers at provision. Importing this class is what pulls the query bus into the bundle.

A child container can register its own QueriesPlugin for a local bus, or omit it to use the nearest ancestor bus.

Example

import { Container, QueriesPlugin, Injectable } from "@wirestate/core";

@Injectable()
class CartService {}

const container = new Container({ bindings: [CartService], plugins: [new QueriesPlugin()] });

Extends

• MessagingPlugin

Constructors

Constructor

new QueriesPlugin(): QueriesPlugin;

Defined in: src/wirestate-core/plugin/queries/queries-plugin.ts:29

Returns

QueriesPlugin

Overrides

MessagingPlugin.constructor

Methods

install()

install(container: Container): void;

Defined in: src/wirestate-core/plugin/messaging-plugin.ts:39

Contributes bindings (or other one-time setup) when the plugin is registered.

Parameters

Parameter	Type	Description
container	Container	Container the plugin is registered on.

Returns

void

Remarks

Runs once, on the container the plugin is registered on (not on inheriting children), before any binding activates.

Register cleanup for install-time side effects with addRollback. Rollbacks run in reverse order if this or a later install throws, or if container construction fails afterwards. They are failsafe and do not run during normal container teardown.

Inherited from

MessagingPlugin.install

---

onProvision()

onProvision(
   instance: object, 
   container: Container, 
   addDisposer: (dispose: () => void) => void): void;

Defined in: src/wirestate-core/plugin/messaging-plugin.ts:57

Wires a provisioned instance, before any user @OnProvision.

Parameters

Parameter	Type	Description
instance	object	The provisioned instance.
container	Container	Container being provisioned.
addDisposer	(dispose: () => void) => void	Registers a teardown callback for this provision cycle.

Returns

void

Remarks

Register teardown with addDisposer. Disposers run (reverse order, failsafe) at deprovision. A throw here unwinds the whole provision cycle.

Inherited from

MessagingPlugin.onProvision

---

participates()

participates(token: ServiceToken): boolean;

Defined in: src/wirestate-core/plugin/messaging-plugin.ts:47

Declares whether a binding token is a participant this plugin wires.

Parameters

Parameter	Type	Description
token	ServiceToken	Binding token to inspect.

Returns

boolean

Whether the plugin participates in this token.

Remarks

Token/class-level so it can drive force-activation: a token this returns true for is resolved (activated) at provision even if nothing injected it, and the instance is then delivered to WirestatePlugin.onProvision. Omit for a pure observer that force-activates nothing.

Inherited from

MessagingPlugin.participates