Trait opendal::raw::oio::AppendWrite

pub trait AppendWrite: Send + Sync + Unpin + 'static {
    // Required methods
    fn offset(&self) -> impl Future<Output = Result<u64>> + MaybeSend;
    fn append(
        &self,
        offset: u64,
        size: u64,
        body: Buffer
    ) -> impl Future<Output = Result<()>> + MaybeSend;
}

AppendWrite is used to implement [Write] based on append object. By implementing AppendWrite, services don’t need to care about the details of buffering and uploading parts.

The layout after adopting AppendWrite:

• Services impl AppendWrite
• AppendWriter impl Write
• Expose AppendWriter as Accessor::Writer

Requirements

Services that implement AppendWrite must fulfill the following requirements:

• Must be a http service that could accept AsyncBody.
• Provide a way to get the current offset of the append object.

Required Methods

fn offset(&self) -> impl Future<Output = Result<u64>> + MaybeSend

Get the current offset of the append object.

Returns 0 if the object is not exist.

fn append( &self, offset: u64, size: u64, body: Buffer ) -> impl Future<Output = Result<()>> + MaybeSend

Append the data to the end of this object.

Object Safety

This trait is not object safe.

Implementors