SERVER-24080 Implement and test mock ServiceEntryPoint

4 files changed, 289 insertions, 0 deletions

diff --git a/src/mongo/transport/SConscript b/src/mongo/transport/SConscript
index 04d780779fc..3db057c9dba 100644
--- a/src/mongo/transport/SConscript
+++ b/src/mongo/transport/SConscript
@@ -11,3 +11,29 @@ env.CppUnitTest(
         '$BUILD_DIR/mongo/util/foundation',
     ],
 )
+
+env.Library(
+    target='service_entry_point_test_suite',
+    source=[
+        'service_entry_point_test_suite.cpp',
+        ## move these somewhere better:
+        'session.cpp',
+        'ticket.cpp',
+        'transport_layer.cpp',
+    ],
+    LIBDEPS=[
+        '$BUILD_DIR/mongo/util/foundation',
+        '$BUILD_DIR/mongo/util/net/network',
+    ],
+)
+
+env.CppUnitTest(
+    target='service_entry_point_mock_test',
+    source=[
+        'service_entry_point_mock.cpp', ## move?
+        'service_entry_point_mock_test.cpp',
+    ],
+    LIBDEPS=[
+        'service_entry_point_test_suite',
+    ],
+)
diff --git a/src/mongo/transport/service_entry_point_mock.cpp b/src/mongo/transport/service_entry_point_mock.cpp
new file mode 100644
index 00000000000..778bfcc3758
--- /dev/null
+++ b/src/mongo/transport/service_entry_point_mock.cpp
@@ -0,0 +1,119 @@
+/**
+ *    Copyright (C) 2016 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/transport/service_entry_point_mock.h"
+
+#include <vector>
+
+#include "mongo/bson/bsonmisc.h"
+#include "mongo/bson/bsonobjbuilder.h"
+#include "mongo/stdx/functional.h"
+#include "mongo/stdx/thread.h"
+#include "mongo/transport/transport_layer.h"
+
+namespace mongo {
+
+using namespace transport;
+
+namespace {
+void setOkResponse(Message* m) {
+    // Need to set up our { ok : 1 } response.
+    BufBuilder b{};
+
+    // Leave room for the message header
+    b.skip(mongo::MsgData::MsgDataHeaderSize);
+
+    // Add our response
+    auto okObj = BSON("ok" << 1.0);
+    okObj.appendSelfToBufBuilder(b);
+
+    // Add some metadata
+    auto metadata = BSONObj();
+    metadata.appendSelfToBufBuilder(b);
+
+    // Set Message header fields
+    MsgData::View msg = b.buf();
+    msg.setLen(b.len());
+    msg.setOperation(dbCommandReply);
+
+    // Set the message, transfer buffer ownership to Message
+    m->reset();
+    m->setData(msg.view2ptr(), true);
+    b.decouple();
+}
+
+}  // namespace
+
+ServiceEntryPointMock::ServiceEntryPointMock(transport::TransportLayer* tl)
+    : _tl(tl), _outMessage(), _inShutdown(false) {
+    setOkResponse(&_outMessage);
+}
+
+ServiceEntryPointMock::~ServiceEntryPointMock() {
+    {
+        stdx::lock_guard<stdx::mutex> lk(_shutdownLock);
+        _inShutdown = true;
+    }
+
+    for (auto& t : _threads) {
+        t.join();
+    }
+}
+
+void ServiceEntryPointMock::startSession(transport::Session&& session) {
+    _threads.emplace_back(&ServiceEntryPointMock::run, this, std::move(session));
+}
+
+void ServiceEntryPointMock::run(transport::Session&& session) {
+    Message inMessage;
+    while (true) {
+        {
+            stdx::lock_guard<stdx::mutex> lk(_shutdownLock);
+            if (_inShutdown)
+                break;
+        }
+
+        // sourceMessage()
+        auto sourceTicket = _tl->sourceMessage(session, &inMessage);
+        auto sourceRes = _tl->wait(std::move(sourceTicket));
+        if (!sourceRes.isOK()) {
+            break;
+        }
+
+        // sinkMessage()
+        auto sinkTicket = _tl->sinkMessage(session, _outMessage);
+        auto sinkRes = _tl->wait(std::move(sinkTicket));
+        if (!sinkRes.isOK()) {
+            break;
+        }
+    }
+}
+
+}  // namespace mongo
diff --git a/src/mongo/transport/service_entry_point_mock.h b/src/mongo/transport/service_entry_point_mock.h
new file mode 100644
index 00000000000..582de6178d1
--- /dev/null
+++ b/src/mongo/transport/service_entry_point_mock.h
@@ -0,0 +1,79 @@
+/**
+ *    Copyright (C) 2016 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.
+ */
+
+#pragma once
+
+#include "mongo/base/disallow_copying.h"
+#include "mongo/stdx/mutex.h"
+#include "mongo/stdx/thread.h"
+#include "mongo/transport/service_entry_point.h"
+#include "mongo/util/net/message.h"
+
+namespace mongo {
+
+namespace transport {
+
+class Session;
+class TransportLayer;
+
+}  // namespace transport
+
+class ServiceEntryPointMock : public ServiceEntryPoint {
+    MONGO_DISALLOW_COPYING(ServiceEntryPointMock);
+
+public:
+    ServiceEntryPointMock(transport::TransportLayer* tl);
+
+    virtual ~ServiceEntryPointMock();
+
+    /**
+     * This method will spawn a thread that will do the following:
+     *
+     * - call tl->sourceMessage()
+     * - call tl->wait()
+     * - call tl->sinkMessage() with { ok : 1 }
+     * - call tl->wait()
+     *
+     * ...repeat until wait() returns an error.
+     */
+    void startSession(transport::Session&& session) override;
+
+private:
+    void run(transport::Session&& session);
+
+    transport::TransportLayer* _tl;
+
+    Message _outMessage;
+
+    stdx::mutex _shutdownLock;
+    bool _inShutdown;
+
+    std::vector<stdx::thread> _threads;
+};
+
+}  // namespace mongo
diff --git a/src/mongo/transport/service_entry_point_mock_test.cpp b/src/mongo/transport/service_entry_point_mock_test.cpp
new file mode 100644
index 00000000000..c996c446b37
--- /dev/null
+++ b/src/mongo/transport/service_entry_point_mock_test.cpp
@@ -0,0 +1,65 @@
+/**
+ * Copyright (C) 2016 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/stdx/memory.h"
+#include "mongo/transport/service_entry_point.h"
+#include "mongo/transport/service_entry_point_mock.h"
+#include "mongo/transport/service_entry_point_test_suite.h"
+#include "mongo/transport/session.h"
+#include "mongo/transport/ticket.h"
+#include "mongo/unittest/unittest.h"
+
+namespace mongo {
+
+namespace {
+
+std::unique_ptr<ServiceEntryPoint> mockSEPFactory(transport::TransportLayer* tl) {
+    return stdx::make_unique<ServiceEntryPointMock>(tl);
+}
+
+}  // namespace
+
+TEST_F(ServiceEntryPointTestSuite, ServiceEntryPointMockTest) {
+    setServiceEntryPoint(&mockSEPFactory);
+
+    // Lifecycle tests
+    noLifeCycleTest();
+    halfLifeCycleTest();
+    fullLifeCycleTest();
+
+    // Concurrent session tests
+    interruptingSessionTest();
+
+    // Stress tests
+    burstStressTest();
+    longSessionStressTest();
+}
+
+}  // namespace mongo