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/**
* convert_to_capped_collection.js
*
* Creates a non-capped collection. Converts it to a
* capped collection. After each iteration, truncates the
* collection, ensuring that the storage size of the
* collection is still a multiple of 256.
*
* MongoDB raises the storage size of a capped collection
* to an integer multiple of 256.
*/
load('jstests/concurrency/fsm_workload_helpers/drop_utils.js');
var $config = (function() {
// TODO: This workload may fail if an iteration multiplier is specified.
var data = {
prefix: 'convert_to_capped_collection'
};
var states = (function() {
function uniqueCollectionName(prefix, tid) {
return prefix + '_' + tid;
}
function isMultiple256(num) {
return num % 256 === 0;
}
function init(db, collName) {
this.threadCollName = uniqueCollectionName(this.prefix, this.tid);
var bulk = db[this.threadCollName].initializeUnorderedBulkOp();
for (var i = 0; i < (this.tid + 1) * 200; i++) {
bulk.insert({i: i, rand: Random.rand()});
}
var res = bulk.execute();
assertAlways.writeOK(res);
assertAlways.eq((this.tid + 1) * 200, res.nInserted);
assertWhenOwnDB(!db[this.threadCollName].isCapped());
assertWhenOwnDB.commandWorked(db[this.threadCollName].convertToCapped(this.size));
assertWhenOwnDB(db[this.threadCollName].isCapped());
assertWhenOwnDB(isMultiple256(db[this.threadCollName].stats().maxSize));
}
function convertToCapped(db, collName) {
// divide size by 1.5 so that the resulting size
// is not a multiple of 256
this.size /= 1.5;
assertWhenOwnDB.commandWorked(db[this.threadCollName].convertToCapped(this.size));
assertWhenOwnDB(db[this.threadCollName].isCapped());
assertWhenOwnDB(isMultiple256(db[this.threadCollName].stats().maxSize));
// only the _id index should remain after running convertToCapped
var indexKeys = db[this.threadCollName].getIndexKeys();
assertWhenOwnDB.eq(1, indexKeys.length);
assertWhenOwnDB(function() {
assertWhenOwnDB.docEq({_id: 1}, indexKeys[0]);
});
}
return {
init: init,
convertToCapped: convertToCapped
};
})();
var transitions = {
init: {convertToCapped: 1},
convertToCapped: {convertToCapped: 1}
};
function setup(db, collName, cluster) {
// Initial size should not be a power of 256.
this.size = Math.pow(2, this.iterations + 5) + 1;
}
function teardown(db, collName, cluster) {
var pattern = new RegExp('^' + this.prefix + '_\\d+$');
dropCollections(db, pattern);
}
return {
threadCount: 10,
iterations: 20,
data: data,
states: states,
transitions: transitions,
setup: setup,
teardown: teardown
};
})();
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