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/**
* Copyright (C) 2014 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.
*/
/**
* This file tests db/exec/delete.cpp.
*/
#include "mongo/db/catalog/collection.h"
#include "mongo/db/catalog/database.h"
#include "mongo/db/dbdirectclient.h"
#include "mongo/db/exec/collection_scan.h"
#include "mongo/db/exec/delete.h"
#include "mongo/db/operation_context_impl.h"
#include "mongo/dbtests/dbtests.h"
namespace QueryStageDelete {
//
// Stage-specific tests.
//
class QueryStageDeleteBase {
public:
QueryStageDeleteBase() : _client(&_txn) {
Client::WriteContext ctx(&_txn, ns());
for (size_t i = 0; i < numObj(); ++i) {
BSONObjBuilder bob;
bob.append("foo", static_cast<long long int>(i));
_client.insert(ns(), bob.obj());
}
}
virtual ~QueryStageDeleteBase() {
Client::WriteContext ctx(&_txn, ns());
_client.dropCollection(ns());
}
void remove(const BSONObj& obj) {
_client.remove(ns(), obj);
}
void getLocs(Collection* collection,
CollectionScanParams::Direction direction,
vector<DiskLoc>* out) {
WorkingSet ws;
CollectionScanParams params;
params.collection = collection;
params.direction = direction;
params.tailable = false;
scoped_ptr<CollectionScan> scan(new CollectionScan(&_txn, params, &ws, NULL));
while (!scan->isEOF()) {
WorkingSetID id = WorkingSet::INVALID_ID;
PlanStage::StageState state = scan->work(&id);
if (PlanStage::ADVANCED == state) {
WorkingSetMember* member = ws.get(id);
verify(member->hasLoc());
out->push_back(member->loc);
}
}
}
static size_t numObj() { return 50; }
static const char* ns() { return "unittests.QueryStageDelete"; }
protected:
OperationContextImpl _txn;
private:
DBDirectClient _client;
};
//
// Test invalidation for the delete stage. Use the delete stage to delete some objects
// retrieved by a collscan, then invalidate the upcoming object, then expect the delete stage to
// skip over it and successfully delete the rest.
//
class QueryStageDeleteInvalidateUpcomingObject : public QueryStageDeleteBase {
public:
void run() {
Client::WriteContext ctx(&_txn, ns());
Collection* coll = ctx.getCollection();
// Get the DiskLocs that would be returned by an in-order scan.
vector<DiskLoc> locs;
getLocs(coll, CollectionScanParams::FORWARD, &locs);
// Configure the scan.
CollectionScanParams collScanParams;
collScanParams.collection = coll;
collScanParams.direction = CollectionScanParams::FORWARD;
collScanParams.tailable = false;
// Configure the delete stage.
DeleteStageParams deleteStageParams;
deleteStageParams.isMulti = true;
deleteStageParams.shouldCallLogOp = false;
WorkingSet ws;
DeleteStage deleteStage(&_txn, deleteStageParams, &ws, coll,
new CollectionScan(&_txn, collScanParams, &ws, NULL));
const DeleteStats* stats =
static_cast<const DeleteStats*>(deleteStage.getSpecificStats());
const size_t targetDocIndex = 10;
while (stats->docsDeleted < targetDocIndex) {
WorkingSetID id = WorkingSet::INVALID_ID;
PlanStage::StageState state = deleteStage.work(&id);
ASSERT_EQUALS(PlanStage::NEED_TIME, state);
}
// Remove locs[targetDocIndex];
deleteStage.saveState();
deleteStage.invalidate(locs[targetDocIndex], INVALIDATION_DELETION);
BSONObj targetDoc = coll->docFor(&_txn, locs[targetDocIndex]);
ASSERT(!targetDoc.isEmpty());
remove(targetDoc);
deleteStage.restoreState(&_txn);
// Remove the rest.
while (!deleteStage.isEOF()) {
WorkingSetID id = WorkingSet::INVALID_ID;
PlanStage::StageState state = deleteStage.work(&id);
invariant(PlanStage::NEED_TIME == state || PlanStage::IS_EOF == state);
}
ASSERT_EQUALS(numObj() - 1, stats->docsDeleted);
}
};
class All : public Suite {
public:
All() : Suite("query_stage_delete") {}
void setupTests() {
// Stage-specific tests below.
add<QueryStageDeleteInvalidateUpcomingObject>();
}
} all;
}
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