SERVER-19570 Issue kill against find command cursors in shell when cursor object is destroyed

1 files changed, 72 insertions, 0 deletions

diff --git a/src/mongo/scripting/mozjs/cursor_handle.h b/src/mongo/scripting/mozjs/cursor_handle.h
new file mode 100644
index 00000000000..95f00a3d964
--- /dev/null
+++ b/src/mongo/scripting/mozjs/cursor_handle.h
@@ -0,0 +1,72 @@
+/**
+ * Copyright (C) 2015 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/client/dbclientcursor.h"
+#include "mongo/client/dbclientinterface.h"
+#include "mongo/scripting/mozjs/wraptype.h"
+
+namespace mongo {
+namespace mozjs {
+
+/**
+ * Wraps a DBClientCursor in javascript.
+ *
+ * Note that the install is private, so this class should only be constructible from C++. Current
+ * callers are all via the Mongo object.
+ */
+struct CursorHandleInfo : public BaseInfo {
+    static void construct(JSContext* cx, JS::CallArgs args);
+    static void finalize(JSFreeOp* fop, JSObject* obj);
+
+    struct Functions {
+        MONGO_DEFINE_JS_FUNCTION(zeroCursorId);
+    };
+
+    static const JSFunctionSpec methods[2];
+
+    static const char* const className;
+    static const unsigned classFlags = JSCLASS_HAS_PRIVATE;
+    static const InstallType installType = InstallType::Private;
+
+    /**
+     * We need this because the DBClientBase can go out of scope before all of its children (as
+     * in global shutdown). So we have to manage object lifetimes in C++ land.
+     */
+    struct CursorTracker {
+        CursorTracker(long long curId, std::shared_ptr<DBClientBase> client)
+            : client(std::move(client)), cursorId(curId) {}
+
+        std::shared_ptr<DBClientBase> client;
+        long long cursorId;
+    };
+};
+
+}  // namespace mozjs
+}  // namespace mongo