## MessageStoragePolicy

# Struct MessageStoragePolicy

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    #[non_exhaustive]pub struct MessageStoragePolicy {
        pub allowed_persistence_regions: Vec<String>,
        pub enforce_in_transit: bool,
        /* private fields */
    }

Expand description

A policy constraining the storage of messages published to the topic.

## Fields (Non-exhaustive)§

This struct is marked as non-exhaustive
Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional `Struct { .. }` syntax; cannot be matched against without a wildcard `..`; and struct update syntax will not work.
§`allowed_persistence_regions: Vec<String>`

Optional. A list of IDs of Google Cloud regions where messages that are published to the topic may be persisted in storage. Messages published by publishers running in non-allowed Google Cloud regions (or running outside of Google Cloud altogether) are routed for storage in one of the allowed regions. An empty list means that no regions are allowed, and is not a valid configuration.

§`enforce_in_transit: bool`

Optional. If true, `allowed_persistence_regions` is also used to enforce in-transit guarantees for messages. That is, Pub/Sub will fail Publish operations on this topic and subscribe operations on any subscription attached to this topic in any region that is not in `allowed_persistence_regions`.

## Implementations§

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### impl MessageStoragePolicy

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#### pub fn new() -> Self

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#### pub fn set_allowed_persistence_regions<T, V>(self, v: T) -> Self
where T: IntoIterator<Item = V>, V: Into<String>,

Sets the value of allowed_persistence_regions.

##### §Example

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    let x = MessageStoragePolicy::new().set_allowed_persistence_regions(["a", "b", "c"]);

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#### pub fn set_enforce_in_transit<T: Into<bool>>(self, v: T) -> Self

Sets the value of enforce_in_transit.

##### §Example

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    let x = MessageStoragePolicy::new().set_enforce_in_transit(true);

## Trait Implementations§

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### impl Clone for MessageStoragePolicy

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#### fn clone(&self) -> MessageStoragePolicy

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 MessageStoragePolicy

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

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

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#### fn default() -> MessageStoragePolicy

Returns the “default value” for a type. Read more
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### impl Message for MessageStoragePolicy

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#### fn typename() -> &'static str

The typename of this message.
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### impl PartialEq for MessageStoragePolicy

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#### fn eq(&self, other: &MessageStoragePolicy) -> 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 StructuralPartialEq for MessageStoragePolicy

## Auto Trait Implementations§

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### impl Freeze for MessageStoragePolicy

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### impl RefUnwindSafe for MessageStoragePolicy

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### impl Send for MessageStoragePolicy

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### impl Sync for MessageStoragePolicy

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### impl Unpin for MessageStoragePolicy

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### impl UnwindSafe for MessageStoragePolicy

## Blanket Implementations§

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### impl<T> Any for T
where T: 'static + ?Sized,

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#### fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more
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### impl<T> Borrow<T> for T
where T: ?Sized,

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#### fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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### impl<T> BorrowMut<T> for T
where T: ?Sized,

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#### fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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### impl<T> CloneToUninit for T
where T: Clone,

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#### unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (`clone_to_uninit`)
Performs copy-assignment from `self` to `dest`. Read more
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### impl<T> From<T> for T

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#### fn from(t: T) -> T

Returns the argument unchanged.

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### impl<T> Instrument for T

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#### fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [`Span`], returning an `Instrumented` wrapper. Read more
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#### fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current `Span`, returning an `Instrumented` wrapper. Read more
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### impl<T, U> Into<U> for T
where U: From<T>,

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#### fn into(self) -> U

Calls `U::from(self)`.

That is, this conversion is whatever the implementation of `From<T> for U` chooses to do.

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### impl<T> IntoRequest<T> for T

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#### fn into_request(self) -> Request<T>

Wrap the input message `T` in a `tonic::Request`
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### impl<L> LayerExt<L> for L

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#### fn named_layer<S>(&self, service: S) -> Layered<<L as Layer<S>>::Service, S>
where L: Layer<S>,

Applies the layer to a service and wraps it in [`Layered`].
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### impl<T> PolicyExt for T
where T: ?Sized,

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#### fn and<P, B, E>(self, other: P) -> And<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new `Policy` that returns [`Action::Follow`] only if `self` and `other` return `Action::Follow`. Read more
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#### fn or<P, B, E>(self, other: P) -> Or<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new `Policy` that returns [`Action::Follow`] if either `self` or `other` returns `Action::Follow`. Read more
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### impl<T> ToOwned for T
where T: Clone,

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#### type Owned = T

The resulting type after obtaining ownership.
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#### fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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#### fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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### impl<T, U> TryFrom<U> for T
where U: Into<T>,

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#### type Error = Infallible

The type returned in the event of a conversion error.
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#### fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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### impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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#### type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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### impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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#### fn vzip(self) -> V

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### impl<T> WithSubscriber for T

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#### fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided `Subscriber` to this type, returning a [`WithDispatch`] wrapper. Read more
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#### fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default `Subscriber` to this type, returning a [`WithDispatch`] wrapper. Read more
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### impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,