112 lines
2.5 KiB
JavaScript
112 lines
2.5 KiB
JavaScript
const config = require('../config');
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const Metadata = require('../metadata');
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const mozlog = require('../log');
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const createRedisClient = require('./redis');
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function getPrefix(seconds) {
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return Math.max(Math.floor(seconds / 86400), 1);
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}
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class DB {
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constructor(config) {
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let Storage = null;
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if (config.s3_bucket) {
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Storage = require('./s3');
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} else if (config.gcs_bucket) {
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Storage = require('./gcs');
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} else {
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Storage = require('./fs');
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}
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this.log = mozlog('send.storage');
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this.storage = new Storage(config, this.log);
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this.redis = createRedisClient(config);
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this.redis.on('error', err => {
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this.log.error('Redis:', err);
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});
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}
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async ttl(id) {
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const result = await this.redis.ttlAsync(id);
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return Math.ceil(result) * 1000;
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}
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async getPrefixedInfo(id) {
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const [prefix, dead, flagged] = await this.redis.hmgetAsync(
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id,
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'prefix',
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'dead',
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'flagged'
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);
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return {
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filePath: `${prefix}-${id}`,
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flagged,
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dead
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};
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}
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async length(id) {
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const { filePath } = await this.getPrefixedInfo(id);
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return this.storage.length(filePath);
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}
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async get(id) {
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const info = await this.getPrefixedInfo(id);
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if (info.dead || info.flagged) {
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throw new Error(info.flagged ? 'flagged' : 'dead');
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}
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return this.storage.getStream(info.filePath);
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}
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async set(id, file, meta, expireSeconds = config.default_expire_seconds) {
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const prefix = getPrefix(expireSeconds);
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const filePath = `${prefix}-${id}`;
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await this.storage.set(filePath, file);
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if (meta) {
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this.redis.hmset(id, { prefix, ...meta });
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} else {
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this.redis.hset(id, 'prefix', prefix);
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}
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this.redis.expire(id, expireSeconds);
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}
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setField(id, key, value) {
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this.redis.hset(id, key, value);
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}
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incrementField(id, key, increment = 1) {
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this.redis.hincrby(id, key, increment);
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}
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async kill(id) {
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const { filePath, dead } = await this.getPrefixedInfo(id);
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if (!dead) {
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this.storage.del(filePath);
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this.redis.hset(id, 'dead', 1);
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}
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}
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async flag(id) {
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await this.kill(id);
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this.redis.hset(id, 'flagged', 1);
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}
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async del(id) {
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const { filePath } = await this.getPrefixedInfo(id);
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this.storage.del(filePath);
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this.redis.del(id);
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}
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async ping() {
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await this.redis.pingAsync();
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await this.storage.ping();
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}
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async metadata(id) {
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const result = await this.redis.hgetallAsync(id);
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return result && new Metadata(result);
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}
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}
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module.exports = new DB(config);
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