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ComposeOptions

opendal::options

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,
}
Expand description

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.

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§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§

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impl Clone for ComposeOptions

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fn clone(&self) -> ComposeOptions

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for ComposeOptions

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

Formats the value using the given formatter. Read more
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impl Default for ComposeOptions

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fn default() -> ComposeOptions

Returns the “default value” for a type. Read more
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impl PartialEq for ComposeOptions

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Eq for ComposeOptions

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impl StructuralPartialEq for ComposeOptions

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