1 // Copyright 2020 Google LLC 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #include "google/cloud/pubsub/connection_options.h" 16 #include "google/cloud/pubsub/internal/user_agent_prefix.h" 17 #include <thread> 18 19 namespace google { 20 namespace cloud { 21 namespace pubsub { 22 inline namespace GOOGLE_CLOUD_CPP_PUBSUB_NS { 23 default_endpoint()24std::string ConnectionOptionsTraits::default_endpoint() { 25 return "pubsub.googleapis.com"; 26 } 27 user_agent_prefix()28std::string ConnectionOptionsTraits::user_agent_prefix() { 29 return pubsub_internal::UserAgentPrefix(); 30 } 31 default_num_channels()32int ConnectionOptionsTraits::default_num_channels() { 33 auto const ncores = std::thread::hardware_concurrency(); 34 return ncores == 0 ? 4 : static_cast<int>(ncores * 4); 35 } 36 37 } // namespace GOOGLE_CLOUD_CPP_PUBSUB_NS 38 } // namespace pubsub 39 } // namespace cloud 40 } // namespace google 41