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'use strict';
/**
* rename_capped_collection_dbname_droptarget.js
*
* Creates a capped collection and then repeatedly executes the renameCollection
* command against it, specifying a different database name in the namespace.
* Inserts documents into the "to" namespace and specifies dropTarget=true.
*
* @tags: [
* # Rename between DBs with different shard primary is not supported
* assumes_unsharded_collection,
* requires_capped,
* ]
*/
var $config = (function() {
var data = {
// Use the workload name as a prefix for the collection name,
// since the workload name is assumed to be unique.
prefix: 'rename_capped_collection_dbname_droptarget'
};
var states = (function() {
var options = {capped: true, size: 4096};
function uniqueDBName(prefix, tid, num) {
return prefix + tid + '_' + num;
}
function insert(db, collName, numDocs) {
for (var i = 0; i < numDocs; ++i) {
var res = db[collName].insert({});
assertAlways.commandWorked(res);
assertAlways.eq(1, res.nInserted);
}
}
function init(db, collName) {
var num = 0;
this.fromDBName = db.getName() + uniqueDBName(this.prefix, this.tid, num++);
this.toDBName = db.getName() + uniqueDBName(this.prefix, this.tid, num++);
var fromDB = db.getSiblingDB(this.fromDBName);
assertAlways.commandWorked(fromDB.createCollection(collName, options));
assertAlways(fromDB[collName].isCapped());
}
function rename(db, collName) {
var fromDB = db.getSiblingDB(this.fromDBName);
var toDB = db.getSiblingDB(this.toDBName);
// Clear out the "from" collection and insert 'fromCollCount' documents
var fromCollCount = 7;
assertAlways(fromDB[collName].drop());
assertAlways.commandWorked(fromDB.createCollection(collName, options));
assertAlways(fromDB[collName].isCapped());
insert(fromDB, collName, fromCollCount);
var toCollCount = 4;
assertAlways.commandWorked(toDB.createCollection(collName, options));
insert(toDB, collName, toCollCount);
// Verify that 'fromCollCount' documents exist in the "to" collection
// after the rename occurs
var renameCommand = {
renameCollection: this.fromDBName + '.' + collName,
to: this.toDBName + '.' + collName,
dropTarget: true
};
assertAlways.commandWorked(fromDB.adminCommand(renameCommand));
assertAlways(toDB[collName].isCapped());
assertAlways.eq(fromCollCount, toDB[collName].find().itcount());
assertAlways.eq(0, fromDB[collName].find().itcount());
// Swap "to" and "from" collections for next execution
var temp = this.fromDBName;
this.fromDBName = this.toDBName;
this.toDBName = temp;
}
return {init: init, rename: rename};
})();
var transitions = {init: {rename: 1}, rename: {rename: 1}};
return {
threadCount: 10,
iterations: 20,
data: data,
states: states,
transitions: transitions,
};
})();
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