Struct ComposeOptions 

pub struct ComposeOptions {
    pub cache_control: Option<String>,
    pub content_type: Option<String>,
    pub content_disposition: Option<String>,
    pub content_encoding: Option<String>,
    pub user_metadata: Option<HashMap<String, String>>,
    pub if_match: Option<String>,
    pub if_none_match: Option<String>,
    pub if_version_match: Option<String>,
    pub if_version_not_match: Option<String>,
    pub if_not_exists: bool,
    pub if_not_changed: Option<Metadata>,
    pub concurrent: usize,
}

Options for composing complete source objects into one destination object.

Metadata fields apply only to the destination. Conditions check the destination object and follow the matching WriteOptions contracts.

Fields

cache_control: Option<String>

Sets Cache-Control metadata on the destination object.

content_type: Option<String>

Sets Content-Type metadata on the destination object.

content_disposition: Option<String>

Sets Content-Disposition metadata on the destination object.

content_encoding: Option<String>

Sets Content-Encoding metadata on the destination object.

user_metadata: Option<HashMap<String, String>>

Sets user metadata on the destination object.

if_match: Option<String>

Compose only when the destination has this exact ETag.

if_none_match: Option<String>

Compose only when the destination does not have this ETag.

if_version_match: Option<String>

Compose only when the destination has this exact version.

if_version_not_match: Option<String>

Compose only when the destination does not have this version.

if_not_exists: bool

Compose only when no destination object exists.

if_not_changed: Option<Metadata>

Compose only when the destination still has this metadata identity.

OpenDAL derives a version match when the service supports version conditions and the metadata contains a version. Otherwise it derives an ETag match when possible. The operation returns crate::ErrorKind::Unsupported when the service does not support the derived primitive condition, and crate::ErrorKind::ConfigInvalid when the metadata contains neither a version nor an ETag.

concurrent: usize

Maximum number of independent backend composition tasks.

The default value is 1. Services that use one atomic request may ignore values greater than 1.

Trait Implementations

impl Clone for ComposeOptions

fn clone(&self) -> ComposeOptions

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ComposeOptions

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

Formats the value using the given formatter.

impl Default for ComposeOptions

fn default() -> ComposeOptions

Returns the “default value” for a type.

impl Eq for ComposeOptions

impl PartialEq for ComposeOptions

fn eq(&self, other: &ComposeOptions) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ComposeOptions