Struct DataStoreRead 

pub struct DataStoreRead {
    pub busy: bool,
    pub done: bool,
    pub error: bool,
    pub error_message: String,
    pub data: Option<Value>,
    /* private fields */
}

Function block for reading a file from the DataStore.

Fields

busy: bool

True while waiting for a response from the datastore.

done: bool

True when the read operation finishes successfully. Stays true until reset or restarted.

error: bool

True if the operation failed.

error_message: String

Error description (empty when no error).

data: Option<Value>

The parsed JSON data from the file. Some after a successful read, None otherwise.

Implementations

impl DataStoreRead

pub fn new() -> Self

Create a new DataStoreRead function block.

pub fn is_busy(&self) -> bool

The FB is currently awaiting a response.

pub fn is_error(&self) -> bool

The last read resulted in an error.

pub fn start(&mut self, path: &str, client: &mut CommandClient)

Start a new file read from the DataStore.

Arguments

• path - The path to the file relative to the datastore root (e.g., "config.json").
• client - The IPC command client.

pub fn reset(&mut self)

Cancel the read and return to idle.

pub fn tick(&mut self, timeout_ms: u32, client: &mut CommandClient)

Execute one scan cycle of the read state machine.

Trait Implementations

impl Default for DataStoreRead

fn default() -> Self

Returns the “default value” for a type.