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'use strict';
/**
* map_reduce_merge_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 on a separate database.
*
* Uses the "merge" action to combine the results with the contents
* of the output collection.
*
* Specifies nonAtomic=true.
*/
load('jstests/concurrency/fsm_libs/extend_workload.js'); // for extendWorkload
load('jstests/concurrency/fsm_workloads/map_reduce_inline.js'); // for $config
load('jstests/concurrency/fsm_workload_helpers/drop_utils.js'); // for dropDatabases
var $config = extendWorkload($config, function($config, $super) {
// Use the workload name as a prefix for the database name,
// since the workload name is assumed to be unique.
var prefix = 'map_reduce_merge_nonatomic';
function uniqueDBName(prefix, tid) {
return prefix + tid;
}
$config.states.init = function init(db, collName) {
$super.states.init.apply(this, arguments);
this.outDBName = db.getName() + uniqueDBName(prefix, this.tid);
var outDB = db.getSiblingDB(this.outDBName);
assertAlways.commandWorked(outDB.createCollection(collName));
};
$config.states.mapReduce = function mapReduce(db, collName) {
var outDB = db.getSiblingDB(this.outDBName);
var fullName = outDB[collName].getFullName();
assertAlways(outDB[collName].exists() !== null,
"output collection '" + fullName + "' should exist");
var options = {
finalize: this.finalizer,
out: {
merge: collName,
db: this.outDBName,
nonAtomic: true
}
};
var res = db[collName].mapReduce(this.mapper, this.reducer, options);
assertAlways.commandWorked(res);
};
$config.teardown = function teardown(db, collName, cluster) {
var pattern = new RegExp('^' + db.getName() + prefix + '\\d+$');
dropDatabases(db, pattern);
};
return $config;
});
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