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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/executor/task_executor_cursor.h"
#include "mongo/client/dbclient_base.h"
#include "mongo/db/namespace_string.h"
#include "mongo/executor/network_interface_factory.h"
#include "mongo/executor/network_interface_thread_pool.h"
#include "mongo/executor/thread_pool_task_executor.h"
#include "mongo/unittest/integration_test.h"
#include "mongo/unittest/unittest.h"
namespace mongo {
namespace executor {
namespace {
class TaskExecutorCursorFixture : public mongo::unittest::Test {
public:
void setUp() override {
std::shared_ptr<NetworkInterface> ni = makeNetworkInterface("TaskExecutorCursorTest");
auto tp = std::make_unique<NetworkInterfaceThreadPool>(ni.get());
_executor = std::make_unique<ThreadPoolTaskExecutor>(std::move(tp), std::move(ni));
_executor->startup();
};
void tearDown() override {
_executor->shutdown();
_executor.reset();
};
TaskExecutor* executor() {
return _executor.get();
}
ServiceContext::UniqueServiceContext _serviceCtx = ServiceContext::make();
std::unique_ptr<ThreadPoolTaskExecutor> _executor;
};
// Test that we can actually use a TaskExecutorCursor to read multiple batches from a remote host
TEST_F(TaskExecutorCursorFixture, Basic) {
auto client = _serviceCtx->makeClient("TaskExecutorCursorTest");
auto opCtx = client->makeOperationContext();
// Write 100 documents to "test.test" via dbclient
std::string err;
auto dbclient = unittest::getFixtureConnectionString().connect("TaskExecutorCursorTest", err);
const size_t numDocs = 100;
std::vector<BSONObj> docs;
docs.reserve(numDocs);
for (size_t i = 0; i < numDocs; ++i) {
docs.emplace_back(BSON("x" << int(i)));
}
dbclient->dropCollection("test.test");
dbclient->insert("test.test", docs);
ASSERT_EQUALS(dbclient->count(NamespaceString("test.test")), numDocs);
RemoteCommandRequest rcr(unittest::getFixtureConnectionString().getServers().front(),
"test",
BSON("find"
<< "test"
<< "batchSize" << 10),
opCtx.get());
TaskExecutorCursor tec(executor(), rcr, [] {
TaskExecutorCursor::Options opts;
opts.batchSize = 10;
return opts;
}());
size_t count = 0;
while (auto doc = tec.getNext(opCtx.get())) {
count++;
}
ASSERT_EQUALS(count, numDocs);
}
} // namespace
} // namespace executor
} // namespace mongo
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