DeliveryConfigDeliveryRequirement

Default value. This value is unused.

The server does not wait for a published message to be successfully written to storage before delivering it to subscribers.

The server will not deliver a published message to subscribers until the message has been successfully written to storage. This will result in higher end-to-end latency, but consistent delivery.

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Returns an array containing the constants of this enum type, in the order they're declared.