// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

#ifndef KUDU_LOGGING_TEST_UTIL_H
#define KUDU_LOGGING_TEST_UTIL_H

#include <glog/logging.h>
#include <string>
#include <vector>

namespace kudu {

// GLog sink that keeps an internal buffer of messages that have been logged.
class StringVectorSink : public google::LogSink {
 public:
  void send(google::LogSeverity severity, const char*  /*full_filename*/,
            const char* base_filename, int line,
            const google::LogMessageTime& tm_time,
            const char* message, size_t message_len) override {
    logged_msgs_.push_back(ToString(severity, base_filename, line,
                                    tm_time, message, message_len));
  }

  std::vector<std::string>& logged_msgs() {
    return logged_msgs_;
  }

 private:
  std::vector<std::string> logged_msgs_;
};

// RAII wrapper around registering a LogSink with GLog.
struct ScopedRegisterSink {
  explicit ScopedRegisterSink(google::LogSink* s) : s_(s) {
    google::AddLogSink(s_);
  }
  ~ScopedRegisterSink() {
    google::RemoveLogSink(s_);
  }

  google::LogSink* s_;
};

} // namespace kudu

#endif