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move work on LevelDB

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v1.18.x
psychobunny 11 years ago
parent e79284e75f
commit 129019777f
2 changed files with 169 additions and 121 deletions
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150
src/database/level.js
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@ -2,9 +2,9 @@
(function(module) {
/*
* Okay, so LevelDB was made by Google. Therefore its skalable.
* Okay, so LevelDB was made by Google. Therefore it's skalable.
* BUT, I created 99% of the rest of NodeBB's expected functionality out of just simple get and set commands.
* Therefore, it is unskalable.
* Therefore, it is unskalable. I totally should have read the docs before starting.
*
* With much <3, psychobunny.
*/
@ -58,15 +58,15 @@
// Exported functions
//
module.searchIndex = function(key, content, id) {
// o.O
};
module.search = function(key, term, limit, callback) {
// O.o
};
module.searchRemove = function(key, id, callback) {
// o___O
};
module.flushdb = function(callback) {
@ -78,7 +78,8 @@
};
module.info = function(callback) {
// O____O GIEF FOOD
// v v
};
// key
@ -100,19 +101,28 @@
};
module.set = function(key, value, callback) {
db.put(key, value, callback);
if (value === '') {
callback(false);
} else {
db.put(key, value, function(err) {
// uh, err is {}.. why??
if (typeof callback === 'function') {
callback(null);
}
});
}
};
module.rename = function(oldKey, newKey, callback) {
//db.rename(oldKey, newKey, callback);
// G__G
};
module.expire = function(key, seconds, callback) {
//db.expire(key, seconds, callback);
// >__>
};
module.expireAt = function(key, timestamp, callback) {
//db.expireat(key, timestamp, callback);
// <__<
};
//hashes
@ -132,7 +142,11 @@
};
module.setObjectField = function(key, field, value, callback) {
module.set(key + ':' + field, value, callback);
// can be improved.
module.getObject(key, function(err, obj) {
obj[key] = field;
module.setObject(key, obj, callback);
});
};
module.getObject = function(key, callback) {
@ -225,6 +239,7 @@
module.delete(key + ':' + field, callback);
};
// BEGIN FAILURE: if the obj doesn't exist like redis, it does not create it!
module.incrObjectField = function(key, field, callback) {
module.get(key + ':' + field, function(err, val) {
module.set(key + ':' + field, val + 1, callback);
@ -248,66 +263,76 @@
module.set(key + ':' + field, val - value, callback);
});
};
// END FAILURE: if the obj doesn't exist like redis, it does not create it!
// sets
module.setAdd = function(key, value, callback) {
db.sadd(key, value, callback);
module.getListRange(key, 0, -1, function(err, set) {
if (!set.indexOf(value)) {
module.listAppend(set, value, callback);
} else {
callback(null, true); // verify if it sends back true on redis?
}
});
};
module.setRemove = function(key, value, callback) {
db.srem(key, value, callback);
module.getListRange(key, 0, -1, function(err, set) {
module.set(key, set.splice(set.indexOf(value), 1), callback);
});
};
module.isSetMember = function(key, value, callback) {
db.sismember(key, value, function(err, result) {
if(err) {
return callback(err);
}
callback(null, result === 1);
module.getListRange(key, 0, -1, function(err, set) {
callback(err, !!set.indexOf(value));
});
};
module.isSetMembers = function(key, values, callback) {
var multi = db.multi();
for (var i=0; i<values.length; ++i) {
multi.sismember(key, values[i]);
}
var members = {};
multi.exec(function(err, results) {
if (err) {
return callback(err);
}
for (var i=0; i<results.length; ++i) {
results[i] = results[i] === 1;
}
callback(null, results);
async.each(values, function(value, next) {
module.isSetMember(key, value, function(err, isMember) {
members[key] = isMember;
});
}, function(err) {
callback(err, members);
});
};
module.isMemberOfSets = function(sets, value, callback) {
var multi = db.multi();
for (var i = 0, ii = sets.length; i < ii; i++) {
multi.sismember(sets[i], value);
}
// can be improved
var members = {};
multi.exec(callback);
async.each(sets, function(set, next) {
module.isSetMember(set, value, function(err, isMember) {
members[set] = value;
next();
});
}, function(err) {
callback(err, members);
});
};
module.getSetMembers = function(key, callback) {
db.smembers(key, callback);
module.getListRange(key, 0, -1, callback);
};
module.setCount = function(key, callback) {
db.scard(key, callback);
module.getListRange(key, 0, -1, function(err, set) {
callback(err, set.length);
});
};
module.setRemoveRandom = function(key, callback) {
db.spop(key, callback);
// how random is this? well, how random are the other implementations of this?
// imo rename this to setRemoveOne
module.getListRange(key, 0, -2, function(err, set) {
module.set(key, set.join('-ldb-'), callback);
});
};
// sorted sets
@ -374,26 +399,53 @@
// lists
module.listPrepend = function(key, value, callback) {
module.get(key, function(err, list) {
list.split('-ldb-')
})
db.lpush(key, value, callback);
module.getListRange(key, 0, -1, function(err, list) {
var arr = list || [];
arr.unshift(value);
module.set(key, arr.join('-ldb-'), callback);
});
};
module.listAppend = function(key, value, callback) {
db.rpush(key, value, callback);
module.getListRange(key, 0, -1, function(err, list) {
var arr = list || [];
arr.push(value);
module.set(key, arr.join('-ldb-'), callback);
});
};
module.listRemoveLast = function(key, callback) {
db.rpop(key, callback);
module.getListRange(key, 0, -1, function(err, list) {
var arr = list || [];
list.pop();
module.set(key, list.join('-ldb-'), callback);
});
};
module.listRemoveFirst = function(key, callback) {
module.getListRange(key, 0, -1, function(err, list) {
var arr = list || [];
list.shift();
module.set(key, list.join('-ldb-'), callback);
});
};
module.listRemoveAll = function(key, value, callback) {
db.lrem(key, 0, value, callback);
// wut is this
//db.lrem(key, 0, value, callback);
throw new Error('not implemented');
};
module.getListRange = function(key, start, stop, callback) {
db.lrange(key, start, stop, callback);
// needs testing.
module.get(key, function(err, list) {
if (list) {
list = list.split('-ldb-');
callback(err, list.slice(start, stop >= 0 ? stop : list.length + stop));
} else {
callback(null, []);
}
});
};
}(exports));

140
tests/database.js
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@ -189,7 +189,7 @@ describe('Test database', function() {
];
async.series(listTasks, function(err, results) {
assert.equal(err, null, 'error in list methods');
assert.equal(err, null, 'error in list methods: ' + err);
assert.ok(results);
done();
@ -197,77 +197,7 @@ describe('Test database', function() {
});
/*
it('should not throw err', function(done) {
function sortedSetAdd(callback) {
db.sortedSetAdd('sortedSet3', 12, 5, function(err, data) {
callback(err, {'sortedSetAdd': data});
});
}
function sortedSetRemove(callback) {
db.sortedSetRemove('sortedSet3', 12, function(err, data) {
callback(err, {'sortedSetRemove': data});
});
}
function getSortedSetRange(callback) {
db.getSortedSetRevRange('sortedSet3', 0, -1, function(err, data) {
callback(err, {'getSortedSetRange': data});
});
}
function getSortedSetRevRangeByScore(callback) {
var args = ['sortedSet2', '+inf', 100, 'LIMIT', 0, 10];
db.getSortedSetRevRangeByScore(args, function(err, data) {
callback(err, {'getSortedSetRevRangeByScore': data});
});
}
function sortedSetCount(callback) {
db.sortedSetCount('sortedSet3', -Infinity, Infinity, function(err, data) {
callback(err, {'sortedSetCount': data});
});
}
function sortedSetScore(callback) {
db.sortedSetScore('users:joindate', 1, function(err, data) {
callback(err, {'sortedSetScore': data});
});
}
function sortedSetsScore(callback) {
db.sortedSetsScore(['users:joindate', 'users:derp', 'users:postcount'], 1, function(err, data) {
callback(err, {'sortedSetsScore': data});
});
}
var sortedSetTasks = [
sortedSetAdd,
getSortedSetRange,
sortedSetAdd,
getSortedSetRange,
sortedSetRemove,
getSortedSetRange,
sortedSetCount,
sortedSetScore,
sortedSetsScore,
getSortedSetRevRangeByScore
];
async.series(sortedSetTasks, function(err, results) {
assert.equal(err, null, 'error in sorted set methods');
assert.ok(results);
done();
});
});
it('should not throw err', function(done) {
function setAdd(callback) {
db.setAdd('myTestSet', 15, function(err, data) {
callback(err, {'setAdd': data});
@ -335,5 +265,71 @@ describe('Test database', function() {
done();
});
});
*/
it('should not throw err', function(done) {
function sortedSetAdd(callback) {
db.sortedSetAdd('sortedSet3', 12, 5, function(err, data) {
callback(err, {'sortedSetAdd': data});
});
}
function sortedSetRemove(callback) {
db.sortedSetRemove('sortedSet3', 12, function(err, data) {
callback(err, {'sortedSetRemove': data});
});
}
function getSortedSetRange(callback) {
db.getSortedSetRevRange('sortedSet3', 0, -1, function(err, data) {
callback(err, {'getSortedSetRange': data});
});
}
function getSortedSetRevRangeByScore(callback) {
var args = ['sortedSet2', '+inf', 100, 'LIMIT', 0, 10];
db.getSortedSetRevRangeByScore(args, function(err, data) {
callback(err, {'getSortedSetRevRangeByScore': data});
});
}
function sortedSetCount(callback) {
db.sortedSetCount('sortedSet3', -Infinity, Infinity, function(err, data) {
callback(err, {'sortedSetCount': data});
});
}
function sortedSetScore(callback) {
db.sortedSetScore('users:joindate', 1, function(err, data) {
callback(err, {'sortedSetScore': data});
});
}
function sortedSetsScore(callback) {
db.sortedSetsScore(['users:joindate', 'users:derp', 'users:postcount'], 1, function(err, data) {
callback(err, {'sortedSetsScore': data});
});
}
var sortedSetTasks = [
sortedSetAdd,
getSortedSetRange,
sortedSetAdd,
getSortedSetRange,
sortedSetRemove,
getSortedSetRange,
sortedSetCount,
sortedSetScore,
sortedSetsScore,
getSortedSetRevRangeByScore
];
async.series(sortedSetTasks, function(err, results) {
assert.equal(err, null, 'error in sorted set methods');
assert.ok(results);
done();
});
});
});

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