| 1 | "use strict";
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| 2 | Object.defineProperty(exports, "__esModule", { value: true });
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| 3 | const lru_cache_1 = require("lru-cache");
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| 4 | const number_allocator_1 = require("number-allocator");
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| 5 | class TopicAliasSend {
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| 6 | constructor(max) {
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| 7 | if (max > 0) {
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| 8 | this.aliasToTopic = new lru_cache_1.LRUCache({ max });
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| 9 | this.topicToAlias = {};
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| 10 | this.numberAllocator = new number_allocator_1.NumberAllocator(1, max);
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| 11 | this.max = max;
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| 12 | this.length = 0;
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| 13 | }
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| 14 | }
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| 15 | put(topic, alias) {
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| 16 | if (alias === 0 || alias > this.max) {
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| 17 | return false;
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| 18 | }
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| 19 | const entry = this.aliasToTopic.get(alias);
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| 20 | if (entry) {
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| 21 | delete this.topicToAlias[entry];
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| 22 | }
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| 23 | this.aliasToTopic.set(alias, topic);
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| 24 | this.topicToAlias[topic] = alias;
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| 25 | this.numberAllocator.use(alias);
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| 26 | this.length = this.aliasToTopic.size;
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| 27 | return true;
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| 28 | }
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| 29 | getTopicByAlias(alias) {
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| 30 | return this.aliasToTopic.get(alias);
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| 31 | }
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| 32 | getAliasByTopic(topic) {
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| 33 | const alias = this.topicToAlias[topic];
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| 34 | if (typeof alias !== 'undefined') {
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| 35 | this.aliasToTopic.get(alias);
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| 36 | }
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| 37 | return alias;
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| 38 | }
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| 39 | clear() {
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| 40 | this.aliasToTopic.clear();
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| 41 | this.topicToAlias = {};
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| 42 | this.numberAllocator.clear();
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| 43 | this.length = 0;
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| 44 | }
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| 45 | getLruAlias() {
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| 46 | const alias = this.numberAllocator.firstVacant();
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| 47 | if (alias)
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| 48 | return alias;
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| 49 | return [...this.aliasToTopic.keys()][this.aliasToTopic.size - 1];
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| 50 | }
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| 51 | }
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| 52 | exports.default = TopicAliasSend;
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| 53 | |
| \ | No newline at end of file |