Struct transact::context::manager::sync::ContextManager

pub struct ContextManager { /* fields omitted */ }

A thread-safe ContextManager.

Methods

impl ContextManager

pub fn new(
    database: Box<dyn Read<StateId = String, Key = String, Value = Vec<u8>>>
) -> Self

Constructs a new Context Manager around a given state Read.

The Read defines the state on which the context built.

pub fn get(
    &self,
    context_id: &ContextId,
    keys: &[String]
) -> Result<Vec<(String, Vec<u8>)>, ContextManagerError>

Return a set of values from a context.

The values are returned as key-value tuples

Errors

Returns an error if the context id does not exist, or an error occurs while reading from the underlying state.

pub fn set_state(
    &self,
    context_id: &ContextId,
    key: String,
    value: Vec<u8>
) -> Result<(), ContextManagerError>

Errors

Returns an error if the context id does not exist, or an error occurs while reading from the underlying state.

pub fn delete_state(
    &self,
    context_id: &ContextId,
    key: &str
) -> Result<Option<Vec<u8>>, ContextManagerError>

pub fn add_event(
    &self,
    context_id: &ContextId,
    event: Event
) -> Result<(), ContextManagerError>

pub fn add_data(
    &self,
    context_id: &ContextId,
    data: Vec<u8>
) -> Result<(), ContextManagerError>

Trait Implementations

impl ContextLifecycle for ContextManager

fn create_context(
    &mut self,
    dependent_contexts: &[ContextId],
    state_id: &str
) -> ContextId

Creates a Context, and returns the resulting ContextId.

fn drop_context(&mut self, context_id: ContextId)

fn get_transaction_receipt(
    &self,
    context_id: &ContextId,
    transaction_id: &str
) -> Result<TransactionReceipt, ContextManagerError>

impl Clone for ContextManager

fn clone(&self) -> ContextManager

Returns a copy of the value.

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

Performs copy-assignment from source.