Enum fidl_fuchsia_component::RealmRequest

pub enum RealmRequest {
    OpenExposedDir {
        child: ChildRef,
        exposed_dir: ServerEnd<DirectoryMarker>,
        responder: RealmOpenExposedDirResponder,
    },
    CreateChild {
        collection: CollectionRef,
        decl: Child,
        args: CreateChildArgs,
        responder: RealmCreateChildResponder,
    },
    DestroyChild {
        child: ChildRef,
        responder: RealmDestroyChildResponder,
    },
    ListChildren {
        collection: CollectionRef,
        iter: ServerEnd<ChildIteratorMarker>,
        responder: RealmListChildrenResponder,
    },
}

A protocol used by a component instance to manage its own realm, such as for binding to its children.

Requests to this protocol are processed in the order they are received. Clients that wish to send requests in parallel should open multiple connections.

The component framework provides this service to components that use fuchsia.component.Realm.

Variants

OpenExposedDir

Opens the exposed directory of a child component instance. When this function successfully returns, exposed_dir is bound to a directory that contains the capabilities which the child exposed to its realm via ComponentDecl.exposes (specified via “expose” declarations in the component’s manifest). The child component will not start as a result of this call. Instead, starting will occur iff the parent binds to one of the capabilities contained within exposed_dir.

exposed_dir is open as long as child exists.

Errors:

• INVALID_ARGUMENTS: child is not a valid child reference.
• INSTANCE_NOT_FOUND: child does not exist.
• INSTANCE_CANNOT_RESOLVE: child’s component declaration failed to resolve.
• INSTANCE_DIED: This realm no longer exists.

Fields

child: ChildRef

exposed_dir: ServerEnd<DirectoryMarker>

responder: RealmOpenExposedDirResponder

CreateChild

Creates a child component instance dynamically. When this function returns successfully, the instance exists, but it may not be running.

The environment of the child instance is determined by the environment of the collection. decl must not set environment.

If decl.startup == EAGER, or collection.durability == SINGLE_RUN, [CreateChild] will start the component and return once the component is started. Otherwise, [CreateChild] will return immediately after creating the component and will not start or resolve it.

Errors:

• INVALID_ARGUMENTS: collection is not a valid reference or child is not a valid declaration.
• COLLECTION_NOT_FOUND: collection does not exist.
• INSTANCE_ALREADY_EXISTS: decl.name already exists in collection.
• INSTANCE_CANNOT_RESOLVE: child’s component declaration failed to resolve in a SingleRun collection.
• NO_SPACE: Could not allocate storage for the new instance.
• INSTANCE_DIED: This realm no longer exists.

Fields

collection: CollectionRef

decl: Child

args: CreateChildArgs

responder: RealmCreateChildResponder

DestroyChild

Destroys a dynamically-created component instance. When this function returns, the instance is destroyed and has stopped running. However, cleanup of the component’s resources (such as its isolated storage) may happen in the background after this function returns.

Errors:

• INVALID_ARGUMENTS: child is not a valid reference or does not refer to a dynamic instance.
• INSTANCE_NOT_FOUND: child does not exist.
• COLLECTION_NOT_FOUND: collection does not exist.
• INSTANCE_DIED: This realm no longer exists.

Fields

child: ChildRef

responder: RealmDestroyChildResponder

ListChildren

Returns an iterator that lists all instances in a collection.

NOTE: The results are not guaranteed to be consistent. Instances may be created or destroyed while the iterator is live, but those changes won’t be observed by the iterator after this method returns.

Errors:

• INVALID_ARGUMENTS: collection is not a valid reference or iter does not have ZX_RIGHT_WAIT.
• COLLECTION_NOT_FOUND: collection does not exist.
• INSTANCE_DIED: This realm no longer exists.
• If iter does not have standard channel rights, this function may return ACCESS_DENIED or component manager may close iter.

Fields

collection: CollectionRef

iter: ServerEnd<ChildIteratorMarker>

responder: RealmListChildrenResponder

Implementations

impl RealmRequest

pub fn into_open_exposed_dir( self ) -> Option<(ChildRef, ServerEnd<DirectoryMarker>, RealmOpenExposedDirResponder)>

pub fn into_create_child( self ) -> Option<(CollectionRef, Child, CreateChildArgs, RealmCreateChildResponder)>

pub fn into_destroy_child( self ) -> Option<(ChildRef, RealmDestroyChildResponder)>

pub fn into_list_children( self ) -> Option<(CollectionRef, ServerEnd<ChildIteratorMarker>, RealmListChildrenResponder)>

pub fn method_name(&self) -> &'static str

Name of the method defined in FIDL

Trait Implementations

impl Debug for RealmRequest

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.