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'use strict';
/**
* update_inc.js
*
* Inserts a single document into a collection. Each thread performs an
* update operation to select the document and increment a particular
* field. Asserts that the field has the correct value based on the number
* of increments performed.
*/
load('jstests/concurrency/fsm_workload_helpers/server_types.js'); // for isMongod and isMMAPv1
var $config = (function() {
var data = {
// uses the workload name as _id on the document.
// assumes this name will be unique.
id: 'update_inc'
};
var states = {
init: function init(db, collName) {
this.fieldName = 't' + this.tid;
this.count = 0;
},
update: function update(db, collName) {
var updateDoc = { $inc: {} };
updateDoc.$inc[this.fieldName] = 1;
var res = db[collName].update({ _id: this.id }, updateDoc);
assertAlways.eq(0, res.nUpserted, tojson(res));
if (isMongod(db) && !isMMAPv1(db)) {
// For non-mmap storage engines we can have a strong assertion that exactly one doc
// will be modified.
assertWhenOwnColl.eq(res.nMatched, 1, tojson(res));
if (db.getMongo().writeMode() === 'commands') {
assertWhenOwnColl.eq(res.nModified, 1, tojson(res));
}
}
else {
// Zero matches are possible for MMAP v1 because the update will skip a document
// that was invalidated during a yield.
assertWhenOwnColl.contains(res.nMatched, [0, 1], tojson(res));
if (db.getMongo().writeMode() === 'commands') {
assertWhenOwnColl.contains(res.nModified, [0, 1], tojson(res));
assertAlways.eq(res.nModified, res.nMatched, tojson(res));
}
}
// The $inc operator always modifies the matched document, so if we matched something,
// then we must have updated it.
this.count += (res.nMatched >= 1);
},
find: function find(db, collName) {
var docs = db[collName].find().toArray();
assertWhenOwnColl.eq(1, docs.length);
assertWhenOwnColl(() => {
// If the document hasn't been updated at all, then the field won't exist.
var doc = docs[0];
if (doc.hasOwnProperty(this.fieldName)) {
assertWhenOwnColl.eq(this.count, doc[this.fieldName]);
} else {
assertWhenOwnColl.eq(this.count, 0);
}
});
}
};
var transitions = {
init: { update: 1 },
update: { find: 1 },
find: { update: 1 }
};
function setup(db, collName, cluster) {
var doc = { _id: this.id };
// Pre-populate the fields we need to avoid size change for capped collections.
for (var i = 0; i < this.threadCount; ++i) {
doc['t' + i] = 0;
}
db[collName].insert(doc);
}
return {
threadCount: 5,
iterations: 10,
data: data,
states: states,
transitions: transitions,
setup: setup
};
})();
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