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| 1 | +import { Connection, Delivery, EventContext, Message, ReceiverOptions, Sender, SenderEvents, SenderOptions } from "rhea" |
| 2 | +import { openLink, OutcomeState } from "./utils.js" |
| 3 | +import { randomUUID } from "crypto" |
| 4 | +import { inspect } from "util" |
| 5 | +import { createAddressFrom, DestinationOptions } from "./message.js" |
| 6 | + |
| 7 | +const getPublisherSenderLinkConfigurationFrom = ( |
| 8 | + address: string, |
| 9 | + publisherId: string |
| 10 | +): SenderOptions | ReceiverOptions => ({ |
| 11 | + snd_settle_mode: 0, |
| 12 | + rcv_settle_mode: 0, |
| 13 | + name: publisherId, |
| 14 | + target: { address, expiry_policy: "SESSION_END", durable: 0, dynamic: false }, |
| 15 | + source: { |
| 16 | + address, |
| 17 | + expiry_policy: "LINK_DETACH", |
| 18 | + timeout: 0, |
| 19 | + dynamic: false, |
| 20 | + durable: 0, |
| 21 | + }, |
| 22 | +}) |
| 23 | + |
| 24 | +interface PublishResult { |
| 25 | + delivery: Delivery |
| 26 | + outcome: OutcomeState |
| 27 | +} |
| 28 | + |
| 29 | +type ResolvableSenderEvents = SenderEvents.accepted | SenderEvents.rejected | SenderEvents.released |
| 30 | +type RejectableSenderEvents = SenderEvents.senderError |
| 31 | +type SenderSenderEventHandler = (senderEvent: ResolvableSenderEvents) => (context: EventContext) => void |
| 32 | +type ErrorSenderEventHandler = (context: EventContext, errorEvent: RejectableSenderEvents, deliveryId: number) => void |
| 33 | +type MessageHandlerPromise = { |
| 34 | + resolve: (publishResult: PublishResult) => void |
| 35 | + reject: (error: Error) => void |
| 36 | +} |
| 37 | + |
| 38 | +export interface Publisher { |
| 39 | + publish(message: Message): Promise<PublishResult> |
| 40 | + close(): void |
| 41 | + get id(): string |
| 42 | +} |
| 43 | + |
| 44 | +export class AmqpPublisher implements Publisher { |
| 45 | + static async createFrom( |
| 46 | + connection: Connection, |
| 47 | + publishersList: Map<string, Publisher>, |
| 48 | + options?: DestinationOptions |
| 49 | + ): Promise<Publisher> { |
| 50 | + const address = createAddressFrom(options) |
| 51 | + const id = randomUUID() |
| 52 | + const senderLink = await AmqpPublisher.openSender(connection, address, id) |
| 53 | + return new AmqpPublisher(connection, senderLink, id, publishersList) |
| 54 | + } |
| 55 | + |
| 56 | + private static async openSender(connection: Connection, address: string, publisherId: string): Promise<Sender> { |
| 57 | + return openLink<Sender>( |
| 58 | + connection, |
| 59 | + SenderEvents.senderOpen, |
| 60 | + SenderEvents.senderError, |
| 61 | + connection.open_sender.bind(connection), |
| 62 | + getPublisherSenderLinkConfigurationFrom(address, publisherId) |
| 63 | + ) |
| 64 | + } |
| 65 | + |
| 66 | + private successMessageHandler: SenderSenderEventHandler |
| 67 | + private errorMessageHandler: ErrorSenderEventHandler |
| 68 | + private promiseMessagesHandler: Map<number, MessageHandlerPromise> = new Map<number, MessageHandlerPromise>() |
| 69 | + |
| 70 | + constructor( |
| 71 | + private readonly connection: Connection, |
| 72 | + private senderLink: Sender, |
| 73 | + private readonly _id: string, |
| 74 | + private publishersList: Map<string, Publisher> |
| 75 | + ) { |
| 76 | + console.log(this.connection.container_id) |
| 77 | + this.successMessageHandler = (senderEvent: ResolvableSenderEvents) => { |
| 78 | + return (context: EventContext) => { |
| 79 | + if (context.delivery) { |
| 80 | + const promise = this.promiseMessagesHandler.get(context.delivery.id) |
| 81 | + if (promise) { |
| 82 | + this.promiseMessagesHandler.delete(context.delivery.id) |
| 83 | + return promise.resolve({ delivery: context.delivery, outcome: getOutcomeStateFrom(senderEvent) }) |
| 84 | + } |
| 85 | + } |
| 86 | + return Promise.reject("Message cannot be handled successfully") |
| 87 | + } |
| 88 | + } |
| 89 | + this.errorMessageHandler = (context: EventContext, errorEvent: RejectableSenderEvents, deliveryId: number) => { |
| 90 | + const promise = this.promiseMessagesHandler.get(deliveryId) |
| 91 | + if (promise) { |
| 92 | + this.promiseMessagesHandler.delete(deliveryId) |
| 93 | + const error = new Error(`SenderLink error ${errorEvent}: ${inspect(context.error)}`) |
| 94 | + return promise.reject(error) |
| 95 | + } |
| 96 | + return Promise.reject("Unhandled error") |
| 97 | + } |
| 98 | + |
| 99 | + this.registerEventListeners() |
| 100 | + } |
| 101 | + |
| 102 | + private registerEventListeners(): void { |
| 103 | + this.senderLink.on(SenderEvents.accepted, this.successMessageHandler(SenderEvents.accepted)) |
| 104 | + this.senderLink.on(SenderEvents.rejected, this.successMessageHandler(SenderEvents.rejected)) |
| 105 | + this.senderLink.on(SenderEvents.released, this.successMessageHandler(SenderEvents.released)) |
| 106 | + this.senderLink.on(SenderEvents.senderError, (context: EventContext) => { |
| 107 | + for (const id of this.promiseMessagesHandler.keys()) |
| 108 | + this.errorMessageHandler(context, SenderEvents.senderError, id) |
| 109 | + }) |
| 110 | + } |
| 111 | + |
| 112 | + private removeEventListeners(): void { |
| 113 | + this.senderLink.removeAllListeners() |
| 114 | + } |
| 115 | + |
| 116 | + async publish(message: Message): Promise<PublishResult> { |
| 117 | + return new Promise<PublishResult>((res, rej) => { |
| 118 | + const delivery = this.senderLink.send(message) |
| 119 | + this.promiseMessagesHandler.set(delivery.id, { |
| 120 | + resolve: (publishResult: PublishResult) => res(publishResult), |
| 121 | + reject: (error: Error) => rej(error), |
| 122 | + }) |
| 123 | + }) |
| 124 | + } |
| 125 | + |
| 126 | + close(): void { |
| 127 | + this.removeEventListeners() |
| 128 | + |
| 129 | + if (this.senderLink.is_open()) this.senderLink.close() |
| 130 | + if (this.publishersList.has(this._id)) this.publishersList.delete(this._id) |
| 131 | + } |
| 132 | + |
| 133 | + get id(): string { |
| 134 | + return this._id |
| 135 | + } |
| 136 | +} |
| 137 | + |
| 138 | +function getOutcomeStateFrom(event: ResolvableSenderEvents): OutcomeState { |
| 139 | + switch (event) { |
| 140 | + case SenderEvents.released: |
| 141 | + return OutcomeState.RELEASED |
| 142 | + case SenderEvents.rejected: |
| 143 | + return OutcomeState.REJECTED |
| 144 | + case SenderEvents.accepted: |
| 145 | + return OutcomeState.ACCEPTED |
| 146 | + } |
| 147 | +} |
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