1 files changed, 81 insertions, 0 deletions
diff --git a/src/mongo/executor/connection_pool_stats.cpp b/src/mongo/executor/connection_pool_stats.cpp
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+++ b/src/mongo/executor/connection_pool_stats.cpp
@@ -0,0 +1,81 @@
+/**
+ *    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.
+ */
+
+#include "mongo/platform/basic.h"
+
+#include "mongo/executor/connection_pool_stats.h"
+
+#include "mongo/bson/bsonobjbuilder.h"
+#include "mongo/util/map_util.h"
+
+namespace mongo {
+namespace executor {
+
+ConnectionStatsPerHost::ConnectionStatsPerHost(size_t nInUse, size_t nAvailable, size_t nCreated)
+    : inUse(nInUse), available(nAvailable), created(nCreated) {}
+
+ConnectionStatsPerHost::ConnectionStatsPerHost() = default;
+
+ConnectionStatsPerHost& ConnectionStatsPerHost::operator+=(const ConnectionStatsPerHost& other) {
+    inUse += other.inUse;
+    available += other.available;
+    created += other.created;
+
+    return *this;
+}
+
+void ConnectionPoolStats::updateStatsForHost(HostAndPort host, ConnectionStatsPerHost newStats) {
+    // Update stats for this host.
+    auto hostStats = mapFindWithDefault(statsByHost, host);
+    hostStats += newStats;
+    statsByHost.insert(std::make_pair(host, hostStats));
+
+    // Update total connection stats.
+    totalInUse += newStats.inUse;
+    totalAvailable += newStats.available;
+    totalCreated += newStats.created;
+}
+
+void ConnectionPoolStats::appendToBSON(mongo::BSONObjBuilder& result) {
+    result.appendNumber("totalInUse", totalInUse);
+    result.appendNumber("totalAvailable", totalAvailable);
+    result.appendNumber("totalCreated", totalCreated);
+
+    BSONObjBuilder hostBuilder(result.subobjStart("hosts"));
+    for (auto&& host : statsByHost) {
+        BSONObjBuilder hostInfo(hostBuilder.subobjStart(host.first.toString()));
+
+        auto hostStats = host.second;
+        hostInfo.appendNumber("inUse", hostStats.inUse);
+        hostInfo.appendNumber("available", hostStats.available);
+        hostInfo.appendNumber("created", hostStats.created);
+    }
+}
+
+}  // namespace executor
+}  // namespace mongo