SERVER-29908 Move sharding_task_executor under mongo/s

1 files changed, 82 insertions, 0 deletions

diff --git a/src/mongo/s/sharding_task_executor.h b/src/mongo/s/sharding_task_executor.h
new file mode 100644
index 00000000000..4c2571c684a
--- /dev/null
+++ b/src/mongo/s/sharding_task_executor.h
@@ -0,0 +1,82 @@
+/**
+ *    Copyright (C) 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.
+ */
+
+#pragma once
+
+#include <memory>
+
+#include "mongo/base/disallow_copying.h"
+#include "mongo/base/status_with.h"
+#include "mongo/executor/task_executor.h"
+#include "mongo/stdx/condition_variable.h"
+#include "mongo/stdx/list.h"
+#include "mongo/stdx/mutex.h"
+
+namespace mongo {
+namespace executor {
+
+struct ConnectionPoolStats;
+class ThreadPoolTaskExecutor;
+
+/**
+ * Implementation of a TaskExecutor that uses ThreadPoolTaskExecutor to submit tasks and allows to
+ * override methods if needed.
+ */
+class ShardingTaskExecutor final : public TaskExecutor {
+    MONGO_DISALLOW_COPYING(ShardingTaskExecutor);
+
+public:
+    ShardingTaskExecutor(std::unique_ptr<ThreadPoolTaskExecutor> executor);
+
+    void startup() override;
+    void shutdown() override;
+    void join() override;
+    void appendDiagnosticBSON(BSONObjBuilder* builder) const override;
+    Date_t now() override;
+    StatusWith<EventHandle> makeEvent() override;
+    void signalEvent(const EventHandle& event) override;
+    StatusWith<CallbackHandle> onEvent(const EventHandle& event, const CallbackFn& work) override;
+    void waitForEvent(const EventHandle& event) override;
+    StatusWith<stdx::cv_status> waitForEvent(OperationContext* opCtx,
+                                             const EventHandle& event,
+                                             Date_t deadline) override;
+    StatusWith<CallbackHandle> scheduleWork(const CallbackFn& work) override;
+    StatusWith<CallbackHandle> scheduleWorkAt(Date_t when, const CallbackFn& work) override;
+    StatusWith<CallbackHandle> scheduleRemoteCommand(const RemoteCommandRequest& request,
+                                                     const RemoteCommandCallbackFn& cb) override;
+    void cancel(const CallbackHandle& cbHandle) override;
+    void wait(const CallbackHandle& cbHandle) override;
+
+    void appendConnectionStats(ConnectionPoolStats* stats) const override;
+
+private:
+    std::unique_ptr<ThreadPoolTaskExecutor> _executor;
+};
+
+}  // namespace executor
+}  // namespace mongo