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/**
* Copyright 2017 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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_catalog_entry.h"
#include "mongo/db/catalog/create_collection.h"
#include "mongo/db/catalog/uuid_catalog.h"
#include "mongo/db/client.h"
#include "mongo/db/db_raii.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/repl/replication_coordinator.h"
#include "mongo/db/repl/replication_coordinator_mock.h"
#include "mongo/db/repl/storage_interface_impl.h"
#include "mongo/db/service_context_d_test_fixture.h"
#include "mongo/stdx/memory.h"
#include "mongo/unittest/unittest.h"
#include "mongo/util/uuid.h"
namespace {
using namespace mongo;
class CreateCollectionTest : public ServiceContextMongoDTest {
private:
void setUp() override;
void tearDown() override;
protected:
// Use StorageInterface to access storage features below catalog interface.
std::unique_ptr<repl::StorageInterface> _storage;
};
void CreateCollectionTest::setUp() {
// Set up mongod.
ServiceContextMongoDTest::setUp();
auto service = getServiceContext();
// Set up ReplicationCoordinator and ensure that we are primary.
auto replCoord = stdx::make_unique<repl::ReplicationCoordinatorMock>(service);
ASSERT_OK(replCoord->setFollowerMode(repl::MemberState::RS_PRIMARY));
repl::ReplicationCoordinator::set(service, std::move(replCoord));
_storage = stdx::make_unique<repl::StorageInterfaceImpl>();
}
void CreateCollectionTest::tearDown() {
_storage = {};
// Tear down mongod.
ServiceContextMongoDTest::tearDown();
}
/**
* Creates an OperationContext.
*/
ServiceContext::UniqueOperationContext makeOpCtx() {
return cc().makeOperationContext();
}
/**
* Returns true if collection exists.
*/
bool collectionExists(OperationContext* opCtx, const NamespaceString& nss) {
return AutoGetCollectionForRead(opCtx, nss).getCollection() != nullptr;
}
/**
* Returns collection options.
*/
CollectionOptions getCollectionOptions(OperationContext* opCtx, const NamespaceString& nss) {
AutoGetCollectionForRead autoColl(opCtx, nss);
auto collection = autoColl.getCollection();
ASSERT_TRUE(collection) << "Unable to get collections options for " << nss
<< " because collection does not exist.";
auto catalogEntry = collection->getCatalogEntry();
return catalogEntry->getCollectionOptions(opCtx);
}
/**
* Returns UUID of collection.
*/
CollectionUUID getCollectionUuid(OperationContext* opCtx, const NamespaceString& nss) {
auto options = getCollectionOptions(opCtx, nss);
ASSERT_TRUE(options.uuid);
return *(options.uuid);
}
TEST_F(CreateCollectionTest, CreateCollectionForApplyOpsWithSpecificUuidNoExistingCollection) {
NamespaceString newNss("test.newColl");
auto opCtx = makeOpCtx();
ASSERT_FALSE(collectionExists(opCtx.get(), newNss));
auto uuid = UUID::gen();
Lock::DBLock lock(opCtx.get(), newNss.db(), MODE_X);
ASSERT_OK(createCollectionForApplyOps(opCtx.get(),
newNss.db().toString(),
uuid.toBSON()["uuid"],
BSON("create" << newNss.coll())));
ASSERT_TRUE(collectionExists(opCtx.get(), newNss));
}
TEST_F(CreateCollectionTest,
CreateCollectionForApplyOpsWithSpecificUuidNonDropPendingCurrentCollectionHasSameUuid) {
NamespaceString curNss("test.curColl");
NamespaceString newNss("test.newColl");
auto opCtx = makeOpCtx();
auto uuid = UUID::gen();
Lock::DBLock lock(opCtx.get(), newNss.db(), MODE_X);
// Create existing collection using StorageInterface.
{
CollectionOptions options;
options.uuid = uuid;
ASSERT_OK(_storage->createCollection(opCtx.get(), curNss, options));
}
ASSERT_TRUE(collectionExists(opCtx.get(), curNss));
ASSERT_FALSE(collectionExists(opCtx.get(), newNss));
// This should rename the existing collection 'curNss' to the collection 'newNss' we are trying
// to create.
ASSERT_OK(createCollectionForApplyOps(opCtx.get(),
newNss.db().toString(),
uuid.toBSON()["uuid"],
BSON("create" << newNss.coll())));
ASSERT_FALSE(collectionExists(opCtx.get(), curNss));
ASSERT_TRUE(collectionExists(opCtx.get(), newNss));
}
TEST_F(CreateCollectionTest,
CreateCollectionForApplyOpsWithSpecificUuidRenamesExistingCollectionWithSameNameOutOfWay) {
NamespaceString newNss("test.newColl");
auto opCtx = makeOpCtx();
auto uuid = UUID::gen();
Lock::DBLock lock(opCtx.get(), newNss.db(), MODE_X);
// Create existing collection with same name but different UUID using StorageInterface.
auto existingCollectionUuid = UUID::gen();
{
CollectionOptions options;
options.uuid = existingCollectionUuid;
ASSERT_OK(_storage->createCollection(opCtx.get(), newNss, options));
}
ASSERT_TRUE(collectionExists(opCtx.get(), newNss));
ASSERT_NOT_EQUALS(uuid, getCollectionUuid(opCtx.get(), newNss));
// This should rename the existing collection 'newNss' to a randomly generated collection name.
ASSERT_OK(createCollectionForApplyOps(opCtx.get(),
newNss.db().toString(),
uuid.toBSON()["uuid"],
BSON("create" << newNss.coll())));
ASSERT_TRUE(collectionExists(opCtx.get(), newNss));
ASSERT_EQUALS(uuid, getCollectionUuid(opCtx.get(), newNss));
// Check that old collection that was renamed out of the way still exists.
auto& uuidCatalog = UUIDCatalog::get(opCtx.get());
auto renamedCollectionNss = uuidCatalog.lookupNSSByUUID(existingCollectionUuid);
ASSERT_TRUE(collectionExists(opCtx.get(), renamedCollectionNss))
<< "old renamed collection with UUID " << existingCollectionUuid
<< " missing: " << renamedCollectionNss;
}
TEST_F(CreateCollectionTest,
CreateCollectionForApplyOpsWithSpecificUuidReturnsNamespaceExistsIfCollectionIsDropPending) {
NamespaceString curNss("test.curColl");
repl::OpTime dropOpTime(Timestamp(Seconds(100), 0), 1LL);
auto dropPendingNss = curNss.makeDropPendingNamespace(dropOpTime);
NamespaceString newNss("test.newColl");
auto opCtx = makeOpCtx();
auto uuid = UUID::gen();
Lock::DBLock lock(opCtx.get(), newNss.db(), MODE_X);
// Create drop pending collection using StorageInterface.
{
CollectionOptions options;
options.uuid = uuid;
ASSERT_OK(_storage->createCollection(opCtx.get(), dropPendingNss, options));
}
ASSERT_TRUE(collectionExists(opCtx.get(), dropPendingNss));
ASSERT_FALSE(collectionExists(opCtx.get(), newNss));
// This should fail because we are not allowed to take a collection out of its drop-pending
// state.
ASSERT_EQUALS(ErrorCodes::NamespaceExists,
createCollectionForApplyOps(opCtx.get(),
newNss.db().toString(),
uuid.toBSON()["uuid"],
BSON("create" << newNss.coll())));
ASSERT_TRUE(collectionExists(opCtx.get(), dropPendingNss));
ASSERT_FALSE(collectionExists(opCtx.get(), newNss));
}
} // namespace
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