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b2d35c5286
RESP3 Support - Some commands responses in RESP3 aren't stable yet and therefore return an "untyped" ReplyUnion. Sentinel TypeMapping Correctly types Multi commands Note: some API changes to be further documented in v4-to-v5.md
81 lines
2.3 KiB
JavaScript
81 lines
2.3 KiB
JavaScript
// This example demonstrates the use of the Bloom Filter
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// in the RedisBloom module (https://redis.io/docs/stack/bloom/)
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import { createClient } from 'redis';
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const client = createClient();
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await client.connect();
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// Delete any pre-existing Bloom Filter.
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await client.del('mybloom');
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// Reserve a Bloom Filter with configurable error rate and capacity.
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// https://redis.io/commands/bf.reserve/
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try {
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await client.bf.reserve('mybloom', 0.01, 1000);
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console.log('Reserved Bloom Filter.');
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} catch (e) {
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if (e.message.endsWith('item exists')) {
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console.log('Bloom Filter already reserved.');
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} else {
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console.log('Error, maybe RedisBloom is not installed?:');
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console.log(e);
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}
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}
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// Add items to Bloom Filter individually with BF.ADD command.
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// https://redis.io/commands/bf.add/
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await Promise.all([
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client.bf.add('mybloom', 'leibale'),
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client.bf.add('mybloom', 'simon'),
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client.bf.add('mybloom', 'guy'),
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client.bf.add('mybloom', 'suze'),
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client.bf.add('mybloom', 'brian'),
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client.bf.add('mybloom', 'steve'),
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client.bf.add('mybloom', 'kyle'),
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client.bf.add('mybloom', 'josefin'),
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client.bf.add('mybloom', 'alex'),
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client.bf.add('mybloom', 'nava'),
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]);
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// Add multiple items to Bloom Filter at once with BF.MADD command.
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// https://redis.io/commands/bf.madd/
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await client.bf.mAdd('mybloom', [
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'kaitlyn',
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'rachel'
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]);
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console.log('Added members to Bloom Filter.');
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// Check whether a member exists with the BF.EXISTS command.
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// https://redis.io/commands/bf.exists/
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const simonExists = await client.bf.exists('mybloom', 'simon');
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console.log(`simon ${simonExists ? 'may' : 'does not'} exist in the Bloom Filter.`);
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// Check whether multiple members exist with the BF.MEXISTS command.
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// https://redis.io/commands/bf.mexists/
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const [ lanceExists, leibaleExists ] = await client.bf.mExists('mybloom', [
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'lance',
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'leibale'
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]);
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console.log(`lance ${lanceExists ? 'may' : 'does not'} exist in the Bloom Filter.`);
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console.log(`leibale ${leibaleExists ? 'may' : 'does not'} exist in the Bloom Filter.`);
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// Get stats for the Bloom Filter with the BF.INFO command.
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// https://redis.io/commands/bf.info/
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const info = await client.bf.info('mybloom');
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// info looks like this:
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//
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// {
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// capacity: 1000,
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// size: 1531,
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// numberOfFilters: 1,
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// numberOfInsertedItems: 12,
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// expansionRate: 2
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// }
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console.log(info);
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client.destroy();
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