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'use strict';
/**
* update_replace.js
*
* Does updates that replace an entire document.
* The collection has indexes on some but not all fields.
*/
// For isMongod and supportsDocumentLevelConcurrency.
load('jstests/concurrency/fsm_workload_helpers/server_types.js');
var $config = (function() {
// explicitly pass db to avoid accidentally using the global `db`
function assertResult(db, res) {
assertAlways.eq(0, res.nUpserted, tojson(res));
if (isMongod(db) && supportsDocumentLevelConcurrency(db)) {
// Storage engines which support document-level concurrency will automatically retry
// any operations when there are conflicts, so we should always see a matching
// document.
assertWhenOwnColl.eq(res.nMatched, 1, tojson(res));
} else {
// On storage engines that do not support document-level concurrency, it is possible
// that the query will not find the document. This can happen if another thread
// updated the target document during a yield, triggering an invalidation.
assertWhenOwnColl.contains(res.nMatched, [0, 1], tojson(res));
}
if (db.getMongo().writeMode() === 'commands') {
// It's possible that we replaced the document with its current contents, making the
// update a no-op.
assertWhenOwnColl.contains(res.nModified, [0, 1], tojson(res));
assertAlways.lte(res.nModified, res.nMatched, tojson(res));
}
}
// returns an update doc
function getRandomUpdateDoc() {
var choices = [{}, {x: 1, y: 1, z: 1}, {a: 1, b: 1, c: 1}];
return choices[Random.randInt(choices.length)];
}
var states = {
update: function update(db, collName) {
// choose a doc to update
var docIndex = Random.randInt(this.numDocs);
// choose an update to apply
var updateDoc = getRandomUpdateDoc();
// apply the update
var res = db[collName].update({_id: docIndex}, updateDoc);
assertResult(db, res);
}
};
var transitions = {update: {update: 1}};
function setup(db, collName, cluster) {
assertAlways.commandWorked(db[collName].ensureIndex({a: 1}));
assertAlways.commandWorked(db[collName].ensureIndex({b: 1}));
// no index on c
assertAlways.commandWorked(db[collName].ensureIndex({x: 1}));
assertAlways.commandWorked(db[collName].ensureIndex({y: 1}));
// no index on z
// numDocs should be much less than threadCount, to make more threads use the same docs.
this.numDocs = Math.floor(this.threadCount / 3);
assertAlways.gt(this.numDocs, 0, 'numDocs should be a positive number');
for (var i = 0; i < this.numDocs; ++i) {
var res = db[collName].insert({_id: i});
assertWhenOwnColl.writeOK(res);
assertWhenOwnColl.eq(1, res.nInserted);
}
assertWhenOwnColl.eq(this.numDocs, db[collName].find().itcount());
}
return {
threadCount: 10,
iterations: 10,
startState: 'update',
states: states,
transitions: transitions,
setup: setup
};
})();
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