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28 lines
1.1 KiB
CoffeeScript
28 lines
1.1 KiB
CoffeeScript
Settings = require "settings-sharelatex"
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redis = require('redis')
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redisConf = Settings.redis?.web or {host: "localhost", port: 6379}
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rclient = redis.createClient(redisConf.port, redisConf.host)
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rclient.auth(redisConf.password)
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rawUpdatesKey = (doc_id) -> "UncompressedHistoryOps:#{doc_id}"
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docsWithHistoryOpsKey = (project_id) -> "DocsWithHistoryOps:#{project_id}"
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module.exports = RedisManager =
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getOldestRawUpdates: (doc_id, batchSize, callback = (error, rawUpdates) ->) ->
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key = rawUpdatesKey(doc_id)
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rclient.lrange key, 0, batchSize - 1, (error, jsonUpdates) ->
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try
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rawUpdates = ( JSON.parse(update) for update in jsonUpdates or [] )
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catch e
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return callback(e)
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callback null, rawUpdates
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deleteOldestRawUpdates: (project_id, doc_id, batchSize, callback = (error) ->) ->
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# It's ok to delete the doc_id from the set here. Even though the list
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# of updates may not be empty, we will continue to process it until it is.
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multi = rclient.multi()
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multi.ltrim rawUpdatesKey(doc_id), batchSize, -1
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multi.srem docsWithHistoryOpsKey(project_id), doc_id
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multi.exec (error, results) ->
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return callback(error) if error?
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callback null
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