Struct flatdata::MemoryResourceStorage

pub struct MemoryResourceStorage { /* private fields */ }

Resource storage in memory.

Used to create and read archives from memory, e.g. for writing tests.

Examples

use flatdata::{MemoryResourceStorage,  Vector};
use flatdata::test::{X, XBuilder};

let storage = MemoryResourceStorage::new("/root/to/my/archive/in/memory");
let builder = XBuilder::new(storage.clone()).expect("failed to create builder");
// Write some data and store it archive, e.g.
let v = Vector::new();
builder.set_data(&v.as_view());

let archive = X::open(storage).expect("failed to open");
// read data
archive.data();

Implementations

impl MemoryResourceStorage

pub fn new<P: Into<PathBuf>>(path: P) -> Arc<Self>

Create an empty memory resource storage at a given virtual path.

Resources will be placed in ephemeral memory with prefix path. A path has to be provided to unify the interface with FileResourceStorage.

Trait Implementations

impl Debug for MemoryResourceStorage

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

Formats the value using the given formatter.

impl ResourceStorage for MemoryResourceStorage

fn subdir(&self, dir: &str) -> StorageHandle

Creates a resource storage at a given subdirectory.

fn exists(&self, resource_name: &str) -> bool

Returns true if resource exists in the storage.

fn read_resource(&self, resource_name: &str) -> Result<&[u8], Error>

Reads a resource in storage and returns a pointer to its raw data.

fn create_output_stream( &self, resource_name: &str ) -> Result<Box<dyn Stream>, Error>

Creates a resource with given name and returns an output stream for writing to it.

fn read( &self, resource_name: &str, schema: &str ) -> Result<&[u8], ResourceStorageError>

Open a flatdata resource with given name and schema for reading.

fn write(&self, resource_name: &str, schema: &str, data: &[u8]) -> Result<()>

Writes data of a flatdata resource with given name and schema to storage.

fn read_and_check_schema( &self, resource_name: &str, expected_schema: &str ) -> Result<&[u8], ResourceStorageError>

Implementation helper for read.