@azure/event-hubs
Version:
Azure Event Hubs SDK for JS.
40 lines • 1.34 kB
JavaScript
// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
/**
* Used by EventHubConsumerClient to prevent accidentally spinning up multiple
* subscriptions against the same set of partitions.
*
* This is needed now that EventHubConsumerClient only uses a single CheckpointStore
* instance - otherwise users will see unpredictable results as their event processor
* continually steals/overwrites checkpointing and ownership with itself.
*
* @internal
*/
export class PartitionGate {
constructor() {
this._partitions = new Set();
}
/**
* Adds a partition, throwing an Error if there is a conflict with partitions (including "all")
* that are already added.
*
* @param partitionId - A partition ID or the constant "all"
*/
add(partitionId) {
if ((partitionId === "all" && this._partitions.size > 0) ||
this._partitions.has(partitionId) ||
this._partitions.has("all")) {
throw new Error(`Partition already has a subscriber.`);
}
this._partitions.add(partitionId);
}
/**
* Removes a partition
*
* @param partitionId - A partition ID or the constant "all"
*/
remove(partitionId) {
this._partitions.delete(partitionId);
}
}
//# sourceMappingURL=partitionGate.js.map