SERVER-37636 Establish an index builds interface through which to access and affect index builds

1 files changed, 78 insertions, 0 deletions

diff --git a/src/mongo/db/database_index_builds_tracker.cpp b/src/mongo/db/database_index_builds_tracker.cpp
new file mode 100644
index 00000000000..6e31c8ffeff
--- /dev/null
+++ b/src/mongo/db/database_index_builds_tracker.cpp
@@ -0,0 +1,78 @@
+/**
+ *    Copyright (C) 2018-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/db/database_index_builds_tracker.h"
+
+#include "mongo/db/catalog/index_builds_manager.h"
+
+namespace mongo {
+
+DatabaseIndexBuildsTracker::~DatabaseIndexBuildsTracker() {
+    invariant(_allIndexBuilds.empty());
+}
+
+void DatabaseIndexBuildsTracker::addIndexBuild(
+    WithLock, std::shared_ptr<ReplIndexBuildState> replIndexBuildState) {
+    invariant(_allIndexBuilds.insert({replIndexBuildState->buildUUID, replIndexBuildState}).second);
+}
+
+void DatabaseIndexBuildsTracker::removeIndexBuild(WithLock, const UUID& buildUUID) {
+    auto it = _allIndexBuilds.find(buildUUID);
+    invariant(it != _allIndexBuilds.end());
+    _allIndexBuilds.erase(it);
+
+    if (_allIndexBuilds.empty()) {
+        _noIndexBuildsRemainCondVar.notify_all();
+    }
+}
+
+void DatabaseIndexBuildsTracker::runOperationOnAllBuilds(
+    WithLock lk,
+    IndexBuildsManager* indexBuildsManager,
+    std::function<void(WithLock,
+                       IndexBuildsManager* indexBuildsManager,
+                       std::shared_ptr<ReplIndexBuildState> replIndexBuildState,
+                       const std::string& reason)> func,
+    const std::string& reason) {
+    for (auto it = _allIndexBuilds.begin(); it != _allIndexBuilds.end(); ++it) {
+        func(lk, indexBuildsManager, it->second, reason);
+    }
+}
+
+int DatabaseIndexBuildsTracker::getNumberOfIndexBuilds(WithLock) const {
+    return _allIndexBuilds.size();
+}
+
+void DatabaseIndexBuildsTracker::waitUntilNoIndexBuildsRemain(stdx::unique_lock<stdx::mutex>& lk) {
+    _noIndexBuildsRemainCondVar.wait(lk, [&] { return _allIndexBuilds.empty(); });
+}
+
+}  // namespace mongo