initial commit

src/StatsColumn.cc

@@ -0,0 +1,67 @@
+// +------------------------------------------------------------------+
+// |             ____ _               _        __  __ _  __           |
+// |            / ___| |__   ___  ___| | __   |  \/  | |/ /           |
+// |           | |   | '_ \ / _ \/ __| |/ /   | |\/| | ' /            |
+// |           | |___| | | |  __/ (__|   <    | |  | | . \            |
+// |            \____|_| |_|\___|\___|_|\_\___|_|  |_|_|\_\           |
+// |                                                                  |
+// | Copyright Mathias Kettner 2014             mk@mathias-kettner.de |
+// +------------------------------------------------------------------+
+//
+// This file is part of Check_MK.
+// The official homepage is at http://mathias-kettner.de/check_mk.
+//
+// check_mk is free software;  you can redistribute it and/or modify it
+// under the  terms of the  GNU General Public License  as published by
+// the Free Software Foundation in version 2.  check_mk is  distributed
+// in the hope that it will be useful, but WITHOUT ANY WARRANTY;  with-
+// out even the implied warranty of  MERCHANTABILITY  or  FITNESS FOR A
+// PARTICULAR PURPOSE. See the  GNU General Public License for more de-
+// tails. You should have  received  a copy of the  GNU  General Public
+// License along with GNU Make; see the file  COPYING.  If  not,  write
+// to the Free Software Foundation, Inc., 51 Franklin St,  Fifth Floor,
+// Boston, MA 02110-1301 USA.
+
+#include "StatsColumn.h"
+#include <ostream>
+#include <stdexcept>
+#include <utility>
+#include "Aggregator.h"
+#include "AndingFilter.h"
+#include "Column.h"
+#include "CountAggregator.h"
+#include "Filter.h"
+#include "Logger.h"
+
+StatsColumnCount::StatsColumnCount(std::unique_ptr<Filter> filter)
+    : _filter(std::move(filter)) {}
+
+std::unique_ptr<Filter> StatsColumnCount::stealFilter() {
+    return std::move(_filter);
+}
+
+std::unique_ptr<Aggregator> StatsColumnCount::createAggregator(
+    Logger * /*logger*/) const {
+    return std::make_unique<CountAggregator>(_filter.get());
+}
+
+// Note: We create an "accept all" filter, just in case we fall back to
+// counting.
+StatsColumnOp::StatsColumnOp(AggregationFactory factory, Column *column)
+    : _factory(std::move(factory))
+    , _column(column)
+    , _filter(AndingFilter::make(Filter::Kind::stats, Filters())) {}
+
+std::unique_ptr<Filter> StatsColumnOp::stealFilter() {
+    throw std::runtime_error("not a counting aggregator");
+}
+
+std::unique_ptr<Aggregator> StatsColumnOp::createAggregator(
+    Logger *logger) const {
+    try {
+        return _column->createAggregator(_factory);
+    } catch (const std::runtime_error &e) {
+        Informational(logger) << e.what() << ", falling back to counting";
+        return std::make_unique<CountAggregator>(_filter.get());
+    }
+}