Trait splinter::node_registry::NodeRegistryReader

pub trait NodeRegistryReader: Send + Sync {
    fn list_nodes<'a, 'b: 'a>(
        &'b self, 
        predicates: &'a [MetadataPredicate]
    ) -> Result<Box<dyn Iterator<Item = Node> + Send + 'a>, NodeRegistryError>;
    fn count_nodes(
        &self, 
        predicates: &[MetadataPredicate]
    ) -> Result<u32, NodeRegistryError>;
    fn fetch_node(&self, identity: &str) -> Result<Node, NodeRegistryError>;

    fn has_node(&self, identity: &str) -> Result<bool, NodeRegistryError> { ... }
}

Provides Node Registry read capabilities.

Required methods

fn list_nodes<'a, 'b: 'a>(
    &'b self,
    predicates: &'a [MetadataPredicate]
) -> Result<Box<dyn Iterator<Item = Node> + Send + 'a>, NodeRegistryError>

Returns an iterator over the nodes in the registry.

Arguments

• predicates - A list of of predicates to be applied to the resulting list. These are applied as an AND, from a query perspective. If the list is empty, it is the equivalent of no predicates (i.e. return all).

fn count_nodes(
    &self,
    predicates: &[MetadataPredicate]
) -> Result<u32, NodeRegistryError>

Returns the count of nodes in the registry.

Arguments

• predicates - A list of of predicates to be applied before counting the nodes. These are applied as an AND, from a query perspective. If the list is empty, it is the equivalent of no predicates (i.e. return all).

fn fetch_node(&self, identity: &str) -> Result<Node, NodeRegistryError>

Returns a node with the given identity.

Arguments

• identity - The Splinter identity of the node.

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Provided methods

fn has_node(&self, identity: &str) -> Result<bool, NodeRegistryError>

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Implementations on Foreign Types

impl<NR: ?Sized> NodeRegistryReader for Box<NR> where
    NR: NodeRegistryReader, 

fn list_nodes<'a, 'b: 'a>(
    &'b self,
    predicates: &'a [MetadataPredicate]
) -> Result<Box<dyn Iterator<Item = Node> + Send + 'a>, NodeRegistryError>

fn count_nodes(
    &self,
    predicates: &[MetadataPredicate]
) -> Result<u32, NodeRegistryError>

fn fetch_node(&self, identity: &str) -> Result<Node, NodeRegistryError>

fn has_node(&self, identity: &str) -> Result<bool, NodeRegistryError>

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Implementors

impl NodeRegistryReader for NoOpNodeRegistry

fn list_nodes<'a, 'b: 'a>(
    &'b self,
    _predicates: &'a [MetadataPredicate]
) -> Result<Box<dyn Iterator<Item = Node> + Send + 'a>, NodeRegistryError>

fn fetch_node(&self, identity: &str) -> Result<Node, NodeRegistryError>

fn count_nodes(
    &self,
    _predicates: &[MetadataPredicate]
) -> Result<u32, NodeRegistryError>

impl NodeRegistryReader for UnifiedNodeRegistry

fn list_nodes<'a, 'b: 'a>(
    &'b self,
    predicates: &'a [MetadataPredicate]
) -> Result<Box<dyn Iterator<Item = Node> + Send + 'a>, NodeRegistryError>

fn count_nodes(
    &self,
    predicates: &[MetadataPredicate]
) -> Result<u32, NodeRegistryError>

This implementation of count_nodes does not take into account the replaced nodes in the node registry, in order to keep the overall operation more efficient.

fn fetch_node(&self, identity: &str) -> Result<Node, NodeRegistryError>

impl NodeRegistryReader for YamlNodeRegistry

fn fetch_node(&self, identity: &str) -> Result<Node, NodeRegistryError>

fn list_nodes<'a, 'b: 'a>(
    &'b self,
    predicates: &'a [MetadataPredicate]
) -> Result<Box<dyn Iterator<Item = Node> + Send + 'a>, NodeRegistryError>

fn count_nodes(
    &self,
    predicates: &[MetadataPredicate]
) -> Result<u32, NodeRegistryError>

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