51 lines
1.8 KiB
JavaScript
51 lines
1.8 KiB
JavaScript
'use strict';
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/**
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* map_reduce_replace_nonexistent.js
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*
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* Generates some random data and inserts it into a collection. Runs a
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* map-reduce command over the collection that computes the frequency
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* counts of the 'value' field and stores the results in a new collection.
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*
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* Uses the "replace" action to write the results to a nonexistent
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* output collection.
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*/
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load('jstests/concurrency/fsm_libs/extend_workload.js'); // for extendWorkload
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load('jstests/concurrency/fsm_workloads/map_reduce_inline.js'); // for $config
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load('jstests/concurrency/fsm_workload_helpers/drop_utils.js'); // for dropCollections
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var $config = extendWorkload($config, function($config, $super) {
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// Use the workload name as a prefix for the collection name,
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// since the workload name is assumed to be unique.
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var prefix = 'map_reduce_replace_nonexistent';
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function uniqueCollectionName(prefix, tid) {
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return prefix + tid;
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}
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$config.states.mapReduce = function mapReduce(db, collName) {
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var outCollName = uniqueCollectionName(prefix, this.tid);
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var fullName = db[outCollName].getFullName();
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assertAlways.isnull(db[outCollName].exists(),
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"output collection '" + fullName + "' should not exist");
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var options = {
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finalize: this.finalizer,
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out: {replace: outCollName},
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query: {key: {$exists: true}, value: {$exists: true}}
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};
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var res = db[collName].mapReduce(this.mapper, this.reducer, options);
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assertAlways.commandWorked(res);
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assertAlways(db[outCollName].drop());
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};
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$config.teardown = function teardown(db, collName, cluster) {
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var pattern = new RegExp('^' + prefix + '\\d+$');
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dropCollections(db, pattern);
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};
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return $config;
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});
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