import { IMessageIdProvider } from './message-id-provider'
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/**
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* UniqueMessageIdProvider
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*/
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declare class UniqueMessageIdProvider implements IMessageIdProvider {
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/**
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* UniqueMessageIdProvider constructor.
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* @constructor
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*/
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constructor ()
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/**
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* Allocate the first vacant messageId. The messageId become occupied status.
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* @return {Number} - The first vacant messageId. If all messageIds are occupied, return null.
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*/
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public allocate (): Number | null
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/**
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* Get the last allocated messageId.
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* @return {Number} - messageId.
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*/
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public getLastAllocated (): Number | null
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/**
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* Register the messageId. The messageId become occupied status.
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* If the messageId has already been occupied, then return false.
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* @param {Number} num - The messageId to request use.
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* @return {Boolean} - If `num` was not occupied, then return true, otherwise return false.
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*/
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public register (num: Number): Boolean
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/**
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* Deallocate the messageId. The messageId become vacant status.
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* @param {Number} num - The messageId to deallocate. The messageId must be occupied status.
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* In other words, the messageId must be allocated by allocate() or
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* occupied by register().
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*/
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public deallocate (num: Number): void
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/**
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* Clear all occupied messageIds.
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* The all messageIds are set to vacant status.
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*/
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public clear (): void
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}
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export { UniqueMessageIdProvider }
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