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'use strict';
/**
* map_reduce_reduce_nonatomic.js
*
* Generates some random data and inserts it into a collection. Runs a
* map-reduce command over the collection that computes the frequency
* counts of the 'value' field and stores the results in an existing
* collection.
*
* Uses the "reduce" action to combine the results with the contents
* of the output collection.
*
* Specifies nonAtomic=true and writes the results of each thread to
* the same collection.
*/
load('jstests/concurrency/fsm_libs/extend_workload.js'); // for extendWorkload
load('jstests/concurrency/fsm_workloads/map_reduce_inline.js'); // for $config
var $config = extendWorkload($config, function($config, $super) {
// Use the workload name as the collection name,
// since the workload name is assumed to be unique.
var uniqueCollectionName = 'map_reduce_reduce_nonatomic';
$config.states.init = function init(db, collName) {
$super.states.init.apply(this, arguments);
this.outCollName = uniqueCollectionName;
};
$config.states.mapReduce = function mapReduce(db, collName) {
var fullName = db[this.outCollName].getFullName();
assertAlways(db[this.outCollName].exists() !== null,
"output collection '" + fullName + "' should exist");
// Have all threads combine their results into the same collection
var options = {
finalize: this.finalizer,
out: {
reduce: this.outCollName,
nonAtomic: true
}
};
var res = db[collName].mapReduce(this.mapper, this.reducer, options);
assertAlways.commandWorked(res);
};
$config.setup = function setup(db, collName, cluster) {
$super.setup.apply(this, arguments);
assertAlways.commandWorked(db.createCollection(uniqueCollectionName));
};
$config.teardown = function teardown(db, collName, cluster) {
assertAlways(db[uniqueCollectionName].drop());
};
return $config;
});
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