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Object cache refactor (#7558)

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* fix: cache refactor

db.getObjectField no longer loads entire object
db.getObjectsFields only clones data once
more tests

* feat: add back cache to redis

db.getObjectField no longer loads entire object
This commit is contained in:
Barış Soner Uşaklı
2019-04-24 14:38:46 -04:00
committed by GitHub
parent e81a1dbb65
commit 2c98dd5f9d
5 changed files with 180 additions and 98 deletions
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111
src/database/mongo/hash.js
View File

@@ -39,31 +39,70 @@ module.exports = function (db, module) {
module.getObject = function (key, callback) {
if (!key) {
return callback();
return setImmediate(callback, null, null);
}
module.getObjects([key], function (err, data) {
if (err) {
return callback(err);
}
callback(null, data && data.length ? data[0] : null);
callback(err, data && data.length ? data[0] : null);
});
};
module.getObjects = function (keys, callback) {
var cachedData = {};
function getFromCache() {
process.nextTick(callback, null, keys.map(key => _.clone(cachedData[key])));
}
module.getObjectsFields(keys, [], callback);
};
module.getObjectField = function (key, field, callback) {
if (!key) {
return setImmediate(callback, null, null);
}
const cachedData = {};
cache.getUnCachedKeys([key], cachedData);
if (cachedData[key]) {
return setImmediate(callback, null, cachedData[key].hasOwnProperty(field) ? cachedData[key][field] : null);
}
field = helpers.fieldToString(field);
db.collection('objects').findOne({ _key: key }, { projection: { _id: 0, [field]: 1 } }, function (err, item) {
if (err || !item) {
return callback(err, null);
}
callback(null, item.hasOwnProperty(field) ? item[field] : null);
});
};
module.getObjectFields = function (key, fields, callback) {
if (!key) {
return setImmediate(callback, null, null);
}
module.getObjectsFields([key], fields, function (err, data) {
callback(err, data ? data[0] : null);
});
};
module.getObjectsFields = function (keys, fields, callback) {
if (!Array.isArray(keys) || !keys.length) {
return callback(null, []);
return setImmediate(callback, null, []);
}
const cachedData = {};
function returnData() {
var mapped = keys.map(function (key) {
if (!fields.length) {
return _.clone(cachedData[key]);
}
const item = cachedData[key] || {};
const result = {};
fields.forEach((field) => {
result[field] = item[field] !== undefined ? item[field] : null;
});
return result;
});
callback(null, mapped);
}
const unCachedKeys = cache.getUnCachedKeys(keys, cachedData);
if (!unCachedKeys.length) {
return getFromCache();
return process.nextTick(returnData);
}
var query = { _key: { $in: unCachedKeys } };
@@ -81,53 +120,7 @@ module.exports = function (db, module) {
cache.set(key, cachedData[key]);
});
getFromCache();
});
};
module.getObjectField = function (key, field, callback) {
if (!key) {
return callback();
}
module.getObject(key, function (err, item) {
if (err || !item) {
return callback(err, null);
}
callback(null, item.hasOwnProperty(field) ? item[field] : null);
});
};
module.getObjectFields = function (key, fields, callback) {
if (!key) {
return callback();
}
module.getObjectsFields([key], fields, function (err, data) {
callback(err, data ? data[0] : null);
});
};
module.getObjectsFields = function (keys, fields, callback) {
if (!Array.isArray(keys) || !keys.length) {
return callback(null, []);
}
module.getObjects(keys, function (err, items) {
if (err) {
return callback(err);
}
if (items === null) {
items = [];
}
const returnData = items.map((item) => {
item = item || {};
const result = {};
fields.forEach((field) => {
result[field] = item[field] !== undefined ? item[field] : null;
});
return result;
});
callback(null, returnData);
returnData();
});
};

6
src/database/postgres/hash.js
View File

@@ -65,7 +65,7 @@ VALUES ($1::TEXT, jsonb_build_object($2::TEXT, $3::TEXT::JSONB))
module.getObject = function (key, callback) {
if (!key) {
return callback();
return callback(null, null);
}
db.query({
@@ -122,7 +122,7 @@ SELECT h."data"
module.getObjectField = function (key, field, callback) {
if (!key) {
return callback();
return setImmediate(callback, null, null);
}
db.query({
@@ -151,7 +151,7 @@ SELECT h."data"->>$2::TEXT f
module.getObjectFields = function (key, fields, callback) {
if (!key) {
return callback();
return setImmediate(callback, null, null);
}
db.query({

115
src/database/redis/hash.js
View File

@@ -3,6 +3,13 @@
module.exports = function (redisClient, module) {
var helpers = module.helpers.redis;
const async = require('async');
const _ = require('lodash');
const cache = require('../cache').create('redis');
module.objectCache = cache;
module.setObject = function (key, data, callback) {
callback = callback || function () {};
if (!key || !data) {
@@ -23,7 +30,11 @@ module.exports = function (redisClient, module) {
return callback();
}
redisClient.hmset(key, data, function (err) {
callback(err);
if (err) {
return callback(err);
}
cache.delObjectCache(key);
callback();
});
};
@@ -33,61 +44,90 @@ module.exports = function (redisClient, module) {
return callback();
}
redisClient.hset(key, field, value, function (err) {
callback(err);
if (err) {
return callback(err);
}
cache.delObjectCache(key);
callback();
});
};
module.getObject = function (key, callback) {
redisClient.hgetall(key, callback);
};
module.getObjects = function (keys, callback) {
if (!Array.isArray(keys) || !keys.length) {
return setImmediate(callback, null, []);
if (!key) {
return setImmediate(callback, null, null);
}
if (keys.length > 1) {
helpers.execKeys(redisClient, 'batch', 'hgetall', keys, callback);
} else {
redisClient.hgetall(keys[0], (err, data) => callback(err, [data]));
}
};
module.getObjectField = function (key, field, callback) {
module.getObjectFields(key, [field], function (err, data) {
callback(err, data ? data[field] : null);
module.getObjectsFields([key], [], function (err, data) {
callback(err, data && data.length ? data[0] : null);
});
};
module.getObjects = function (keys, callback) {
module.getObjectsFields(keys, [], callback);
};
module.getObjectField = function (key, field, callback) {
if (!key) {
return setImmediate(callback, null, null);
}
const cachedData = {};
cache.getUnCachedKeys([key], cachedData);
if (cachedData[key]) {
return setImmediate(callback, null, cachedData[key].hasOwnProperty(field) ? cachedData[key][field] : null);
}
redisClient.hget(key, field, callback);
};
module.getObjectFields = function (key, fields, callback) {
if (!key) {
return setImmediate(callback, null, null);
}
module.getObjectsFields([key], fields, function (err, results) {
callback(err, results ? results[0] : null);
});
};
module.getObjectsFields = function (keys, fields, callback) {
if (!Array.isArray(fields) || !fields.length) {
if (!Array.isArray(keys) || !keys.length) {
return setImmediate(callback, null, []);
}
if (!Array.isArray(fields)) {
return callback(null, keys.map(function () { return {}; }));
}
var batch = redisClient.batch();
const cachedData = {};
const unCachedKeys = cache.getUnCachedKeys(keys, cachedData);
for (var x = 0; x < keys.length; x += 1) {
batch.hmget.apply(batch, [keys[x]].concat(fields));
}
batch.exec(function (err, results) {
if (err) {
return callback(err);
}
results = results.map(function makeObject(array) {
var obj = {};
for (var i = 0, ii = fields.length; i < ii; i += 1) {
obj[fields[i]] = array[i];
async.waterfall([
function (next) {
if (unCachedKeys.length > 1) {
helpers.execKeys(redisClient, 'batch', 'hgetall', unCachedKeys, next);
} else if (unCachedKeys.length === 1) {
redisClient.hgetall(unCachedKeys[0], (err, data) => next(err, [data]));
} else {
next(null, []);
}
return obj;
});
callback(null, results);
});
},
function (data, next) {
unCachedKeys.forEach(function (key, i) {
cachedData[key] = data[i] || null;
cache.set(key, cachedData[key]);
});
var mapped = keys.map(function (key) {
if (!fields.length) {
return _.clone(cachedData[key]);
}
const item = cachedData[key] || {};
const result = {};
fields.forEach((field) => {
result[field] = item[field] !== undefined ? item[field] : null;
});
return result;
});
next(null, mapped);
},
], callback);
};
module.getObjectKeys = function (key, callback) {
@@ -116,12 +156,14 @@ module.exports = function (redisClient, module) {
return setImmediate(callback);
}
redisClient.hdel(key, field, function (err) {
cache.delObjectCache(key);
callback(err);
});
};
module.deleteObjectFields = function (key, fields, callback) {
helpers.execKeyValues(redisClient, 'batch', 'hdel', key, fields, function (err) {
cache.delObjectCache(key);
callback(err);
});
};
@@ -140,6 +182,7 @@ module.exports = function (redisClient, module) {
if (err) {
return callback(err);
}
cache.delObjectCache(key);
callback(null, Array.isArray(result) ? result.map(value => parseInt(value, 10)) : parseInt(result, 10));
}
value = parseInt(value, 10);

5
src/database/redis/main.js
View File

@@ -16,6 +16,7 @@ module.exports = function (redisClient, module) {
if (err) {
return callback(err);
}
module.objectCache.resetObjectCache();
callback();
});
};
@@ -35,6 +36,7 @@ module.exports = function (redisClient, module) {
module.delete = function (key, callback) {
callback = callback || function () {};
redisClient.del(key, function (err) {
module.objectCache.delObjectCache(key);
callback(err);
});
};
@@ -46,6 +48,7 @@ module.exports = function (redisClient, module) {
batch.del(keys[i]);
}
batch.exec(function (err) {
module.objectCache.delObjectCache(keys);
callback(err);
});
};
@@ -72,6 +75,8 @@ module.exports = function (redisClient, module) {
if (err && err.message !== 'ERR no such key') {
return callback(err);
}
module.objectCache.delObjectCache(oldKey);
module.objectCache.delObjectCache(newKey);
callback();
});
};