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'use strict';
/**
* findAndModify_upsert.js
*
* Each thread repeatedly performs the findAndModify command, specifying
* upsert as either true or false. A single document is selected (or
* created) based on the 'query' specification, and updated using the
* $push operator.
*/
var $config = (function() {
var data = {
sort: false,
shardKey: {tid: 1}
};
var states = (function() {
// Returns true if the specified array is sorted in ascending order,
// and false otherwise.
function isSorted(arr) {
for (var i = 0; i < arr.length - 1; ++i) {
if (arr[i] > arr[i + 1]) {
return false;
}
}
return true;
}
function init(db, collName) {
this.iter = 0;
// Need to guarantee that an upsert has occurred prior to an update,
// which is not enforced by the transition table under composition
upsert.call(this, db, collName);
}
function upsert(db, collName) {
var updatedValue = this.iter++;
// Use a query specification that does not match any existing documents
var query = {
_id: new ObjectId(),
tid: this.tid
};
var cmdObj = {
findandmodify: db[collName].getName(),
query: query,
update: {$setOnInsert: {values: [updatedValue]}}, new: true,
upsert: true
};
if (this.sort) {
cmdObj.sort = this.sort;
}
var res = db.runCommand(cmdObj);
assertAlways.commandWorked(res);
var doc = res.value;
assertAlways(doc !== null, 'a document should have been inserted');
assertAlways((function() {
assertAlways.eq(this.tid, doc.tid);
assertAlways(Array.isArray(doc.values), 'expected values to be an array');
assertAlways.eq(1, doc.values.length);
assertAlways.eq(updatedValue, doc.values[0]);
}).bind(this));
}
function update(db, collName) {
var updatedValue = this.iter++;
var cmdObj = {
findandmodify: db[collName].getName(),
query: {tid: this.tid},
update: {$push: {values: updatedValue}}, new: true,
upsert: false
};
if (this.sort) {
cmdObj.sort = this.sort;
}
var res = db.runCommand(cmdObj);
assertAlways.commandWorked(res);
var doc = res.value;
assertWhenOwnColl(doc !== null, 'query spec should have matched a document');
if (doc !== null) {
assertAlways.eq(this.tid, doc.tid);
assertWhenOwnColl(Array.isArray(doc.values), 'expected values to be an array');
assertWhenOwnColl(function() {
assertWhenOwnColl.gte(doc.values.length, 2);
assertWhenOwnColl.eq(updatedValue, doc.values[doc.values.length - 1]);
assertWhenOwnColl(isSorted(doc.values),
'expected values to be sorted: ' + tojson(doc.values));
});
}
}
return {
init: init,
upsert: upsert,
update: update
};
})();
var transitions = {
init: {upsert: 0.1, update: 0.9},
upsert: {upsert: 0.1, update: 0.9},
update: {upsert: 0.1, update: 0.9}
};
return {
threadCount: 20,
iterations: 20,
data: data,
states: states,
transitions: transitions
};
})();
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