Struct MergePolicyRegistry 

pub struct MergePolicyRegistry { /* private fields */ }

Domain-level conflict resolver selected by key.

Implementations

impl MergePolicyRegistry

pub fn new() -> Self

Create an empty registry.

pub fn with_default<F>(policy: F) -> Self

where F: Fn(&Conflict) -> Resolution + Send + Sync + 'static,

Create a registry with a default policy for unmatched keys.

pub fn set_default<F>(&mut self, policy: F) -> &mut Self

where F: Fn(&Conflict) -> Resolution + Send + Sync + 'static,

Set the default policy for unmatched keys.

pub fn default_policy<F>(self, policy: F) -> Self

where F: Fn(&Conflict) -> Resolution + Send + Sync + 'static,

Builder-style default policy registration.

pub fn push_prefix<F>( &mut self, prefix: impl Into<Vec<u8>>, policy: F, ) -> &mut Self

where F: Fn(&Conflict) -> Resolution + Send + Sync + 'static,

Add a policy for keys starting with prefix.

Rules are evaluated from newest to oldest, so later rules override earlier broader rules.

pub fn add_prefix<F>(self, prefix: impl Into<Vec<u8>>, policy: F) -> Self

where F: Fn(&Conflict) -> Resolution + Send + Sync + 'static,

Builder-style prefix policy registration.

pub fn push_exact<F>(&mut self, key: impl Into<Vec<u8>>, policy: F) -> &mut Self

where F: Fn(&Conflict) -> Resolution + Send + Sync + 'static,

Add a policy for one exact key.

Rules are evaluated from newest to oldest, so later rules override earlier broader rules.

pub fn add_exact<F>(self, key: impl Into<Vec<u8>>, policy: F) -> Self

where F: Fn(&Conflict) -> Resolution + Send + Sync + 'static,

Builder-style exact-key policy registration.

pub fn push_pattern<M, F>( &mut self, name: impl Into<String>, matcher: M, policy: F, ) -> &mut Self

where M: Fn(&[u8]) -> bool + Send + Sync + 'static, F: Fn(&Conflict) -> Resolution + Send + Sync + 'static,

Add a policy selected by a custom key matcher.

name is used only for diagnostics and debugging.

pub fn add_pattern<M, F>( self, name: impl Into<String>, matcher: M, policy: F, ) -> Self

where M: Fn(&[u8]) -> bool + Send + Sync + 'static, F: Fn(&Conflict) -> Resolution + Send + Sync + 'static,

Builder-style custom key matcher policy registration.

pub fn len(&self) -> usize

Number of registered key-specific rules.

pub fn is_empty(&self) -> bool

Whether no key-specific rules are registered.

pub fn has_default(&self) -> bool

Whether a default policy is configured for unmatched keys.

pub fn rules(&self) -> &[MergePolicyRule]

Borrow registered rules in insertion order.

pub fn matching_rule(&self, key: &[u8]) -> Option<&MergePolicyRule>

Return the newest matching key-specific rule, if any.

pub fn resolve(&self, conflict: &Conflict) -> Resolution

Resolve one conflict using the newest matching rule or the default.

If no rule matches and no default policy exists, the conflict is left unresolved.

pub fn into_resolver(self) -> Resolver

Convert this registry into a standard merge resolver.

pub fn as_resolver(&self) -> Resolver

Clone this registry into a standard merge resolver.

Trait Implementations

impl Clone for MergePolicyRegistry

fn clone(&self) -> MergePolicyRegistry

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MergePolicyRegistry

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

Formats the value using the given formatter.

impl Default for MergePolicyRegistry

fn default() -> Self

Returns the “default value” for a type.