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/**
* Copyright (C) 2019-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/catalog/collection.h"
#include "mongo/db/catalog/database_holder.h"
#include "mongo/db/catalog/index_catalog.h"
#include "mongo/db/catalog/uncommitted_collections.h"
#include "mongo/db/catalog_raii.h"
#include "mongo/db/client.h"
#include "mongo/db/concurrency/exception_util.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/service_context.h"
#include "mongo/dbtests/dbtests.h"
#include "mongo/unittest/unittest.h"
namespace mongo {
namespace {
bool collectionExists(OperationContext* opCtx, NamespaceString nss) {
return CollectionCatalog::get(opCtx)->lookupCollectionByNamespace(opCtx, nss) != nullptr;
}
class ConcurrentCreateCollectionTest {
public:
void run() {
auto serviceContext = getGlobalServiceContext();
NamespaceString competingNss("test.competingCollection");
auto client1 = serviceContext->makeClient("client1");
auto client2 = serviceContext->makeClient("client2");
auto op1 = client1->makeOperationContext();
auto op2 = client2->makeOperationContext();
Lock::DBLock dbLk1(op1.get(), competingNss.db(), LockMode::MODE_IX);
Lock::CollectionLock collLk1(op1.get(), competingNss, LockMode::MODE_IX);
Lock::DBLock dbLk2(op2.get(), competingNss.db(), LockMode::MODE_IX);
Lock::CollectionLock collLk2(op2.get(), competingNss, LockMode::MODE_IX);
Database* db =
DatabaseHolder::get(op1.get())->openDb(op1.get(), competingNss.db(), nullptr);
{
WriteUnitOfWork wuow1(op1.get());
ASSERT_TRUE(db->createCollection(op1.get(), competingNss) != nullptr);
ASSERT_TRUE(collectionExists(op1.get(), competingNss));
ASSERT_FALSE(collectionExists(op2.get(), competingNss));
{
WriteUnitOfWork wuow2(op2.get());
ASSERT_FALSE(collectionExists(op2.get(), competingNss));
ASSERT_TRUE(db->createCollection(op2.get(), competingNss) != nullptr);
ASSERT_TRUE(collectionExists(op1.get(), competingNss));
ASSERT_TRUE(collectionExists(op2.get(), competingNss));
ASSERT_NOT_EQUALS(UncommittedCollections::getForTxn(op1.get(), competingNss),
UncommittedCollections::getForTxn(op2.get(), competingNss));
wuow2.commit();
}
ASSERT_THROWS(wuow1.commit(), WriteConflictException);
}
ASSERT_TRUE(collectionExists(op1.get(), competingNss));
ASSERT_TRUE(collectionExists(op2.get(), competingNss));
}
};
} // namespace
class AllCatalogTests : public unittest::OldStyleSuiteSpecification {
public:
AllCatalogTests() : unittest::OldStyleSuiteSpecification("CatalogTests") {}
template <typename T>
void add() {
addNameCallback(nameForTestClass<T>(), [] { T().run(); });
}
void setupTests() {
add<ConcurrentCreateCollectionTest>();
}
};
unittest::OldStyleSuiteInitializer<AllCatalogTests> allCatalogTests;
} // namespace mongo
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