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chore: import upstream snapshot with attribution

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wehub-resource-sync
2026-07-13 13:29:29 +08:00
commit f52cf32e56
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example/cascade_echo_c++/CMakeLists.txt
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# 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.
cmake_minimum_required(VERSION 3.16...3.28)
project(cascade_echo_c++ C CXX)
include(${CMAKE_CURRENT_LIST_DIR}/../cmake/BrpcExample.cmake)
option(LINK_SO "Whether examples are linked dynamically" OFF)
execute_process(
COMMAND bash -c "find ${PROJECT_SOURCE_DIR}/../.. -type d -regex \".*output/include$\" | head -n1 | xargs dirname | tr -d '\n'"
OUTPUT_VARIABLE OUTPUT_PATH
)
if(OUTPUT_PATH)
list(PREPEND CMAKE_PREFIX_PATH ${OUTPUT_PATH})
endif()
find_package(Threads REQUIRED)
find_package(Protobuf REQUIRED)
protobuf_generate_cpp(PROTO_SRC PROTO_HEADER echo.proto)
# Search for libthrift* by best effort. If it is not found and brpc is
# compiled with thrift protocol enabled, a link error would be reported.
find_library(THRIFT_LIB NAMES thrift)
if (NOT THRIFT_LIB)
set(THRIFT_LIB "")
endif()
find_path(BRPC_INCLUDE_PATH NAMES brpc/server.h)
if(LINK_SO)
find_library(BRPC_LIB NAMES brpc)
else()
find_library(BRPC_LIB NAMES libbrpc.a brpc)
endif()
if((NOT BRPC_INCLUDE_PATH) OR (NOT BRPC_LIB))
message(FATAL_ERROR "Fail to find brpc")
endif()
find_path(GFLAGS_INCLUDE_PATH gflags/gflags.h)
find_library(GFLAGS_LIBRARY NAMES gflags libgflags)
if((NOT GFLAGS_INCLUDE_PATH) OR (NOT GFLAGS_LIBRARY))
message(FATAL_ERROR "Fail to find gflags")
endif()
find_path(LEVELDB_INCLUDE_PATH NAMES leveldb/db.h)
find_library(LEVELDB_LIB NAMES leveldb)
if ((NOT LEVELDB_INCLUDE_PATH) OR (NOT LEVELDB_LIB))
message(FATAL_ERROR "Fail to find leveldb")
endif()
if(CMAKE_SYSTEM_NAME STREQUAL "Darwin" AND NOT OPENSSL_ROOT_DIR)
set(OPENSSL_ROOT_DIR
"/usr/local/opt/openssl" # Homebrew installed OpenSSL
)
endif()
find_package(OpenSSL REQUIRED)
set(DYNAMIC_LIB
Threads::Threads
${GFLAGS_LIBRARY}
${PROTOBUF_LIBRARIES}
${LEVELDB_LIB}
${OPENSSL_CRYPTO_LIBRARY}
${OPENSSL_SSL_LIBRARY}
${THRIFT_LIB}
dl
)
if(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
set(DYNAMIC_LIB ${DYNAMIC_LIB}
pthread
"-framework CoreFoundation"
"-framework CoreGraphics"
"-framework CoreData"
"-framework CoreText"
"-framework Security"
"-framework Foundation"
"-Wl,-U,_MallocExtension_ReleaseFreeMemory"
"-Wl,-U,_ProfilerStart"
"-Wl,-U,_ProfilerStop"
"-Wl,-U,__Z13GetStackTracePPvii"
"-Wl,-U,_mallctl"
"-Wl,-U,_malloc_stats_print"
)
endif()
add_executable(cascade_echo_client client.cpp ${PROTO_SRC} ${PROTO_HEADER})
brpc_example_configure_target(cascade_echo_client)
add_executable(cascade_echo_server server.cpp ${PROTO_SRC} ${PROTO_HEADER})
brpc_example_configure_target(cascade_echo_server)
target_link_libraries(cascade_echo_client PRIVATE ${BRPC_LIB} ${DYNAMIC_LIB})
target_link_libraries(cascade_echo_server PRIVATE ${BRPC_LIB} ${DYNAMIC_LIB})
example/cascade_echo_c++/client.cpp
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// 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.
// A client sending requests to server which will send the request to itself
// again according to the field `depth'
#include <gflags/gflags.h>
#include <butil/logging.h>
#include <butil/time.h>
#include <bthread/bthread.h>
#include <brpc/channel.h>
#include <brpc/server.h>
#include "echo.pb.h"
#include <bvar/bvar.h>
#include <butil/fast_rand.h>
DEFINE_int32(thread_num, 2, "Number of threads to send requests");
DEFINE_bool(use_bthread, false, "Use bthread to send requests");
DEFINE_string(attachment, "foo", "Carry this along with requests");
DEFINE_string(connection_type, "", "Connection type. Available values: single, pooled, short");
DEFINE_string(server, "0.0.0.0:8000", "IP Address of server");
DEFINE_string(load_balancer, "", "The algorithm for load balancing");
DEFINE_int32(timeout_ms, 100, "RPC timeout in milliseconds");
DEFINE_int32(max_retry, 3, "Max retries(not including the first RPC)");
DEFINE_string(protocol, "baidu_std", "Protocol type. Defined in src/brpc/options.proto");
DEFINE_int32(depth, 0, "number of loop calls");
// Don't send too frequently in this example
DEFINE_int32(sleep_ms, 1000, "milliseconds to sleep after each RPC");
DEFINE_int32(dummy_port, -1, "Launch dummy server at this port");
bvar::LatencyRecorder g_latency_recorder("client");
void* sender(void* arg) {
brpc::Channel* chan = (brpc::Channel*)arg;
// Normally, you should not call a Channel directly, but instead construct
// a stub Service wrapping it. stub can be shared by all threads as well.
example::EchoService_Stub stub(chan);
// Send a request and wait for the response every 1 second.
while (!brpc::IsAskedToQuit()) {
// We will receive response synchronously, safe to put variables
// on stack.
example::EchoRequest request;
example::EchoResponse response;
brpc::Controller cntl;
request.set_message("hello world");
if (FLAGS_depth > 0) {
request.set_depth(FLAGS_depth);
}
// Set request_id to be a random string
cntl.set_request_id(butil::fast_rand_printable(9));
// Set attachment which is wired to network directly instead of
// being serialized into protobuf messages.
cntl.request_attachment().append(FLAGS_attachment);
// Because `done'(last parameter) is NULL, this function waits until
// the response comes back or error occurs(including timedout).
stub.Echo(&cntl, &request, &response, NULL);
if (cntl.Failed()) {
//LOG_EVERY_SECOND(WARNING) << "Fail to send EchoRequest, " << cntl.ErrorText();
} else {
g_latency_recorder << cntl.latency_us();
}
if (FLAGS_sleep_ms != 0) {
bthread_usleep(FLAGS_sleep_ms * 1000L);
}
}
return NULL;
}
int main(int argc, char* argv[]) {
// Parse gflags. We recommend you to use gflags as well.
GFLAGS_NAMESPACE::SetUsageMessage("Send EchoRequest to server every second");
GFLAGS_NAMESPACE::ParseCommandLineFlags(&argc, &argv, true);
// A Channel represents a communication line to a Server. Notice that
// Channel is thread-safe and can be shared by all threads in your program.
brpc::Channel channel;
brpc::ChannelOptions options;
options.protocol = FLAGS_protocol;
options.connection_type = FLAGS_connection_type;
options.timeout_ms = FLAGS_timeout_ms/*milliseconds*/;
options.max_retry = FLAGS_max_retry;
// Initialize the channel, NULL means using default options.
// options, see `brpc/channel.h'.
if (channel.Init(FLAGS_server.c_str(), FLAGS_load_balancer.c_str(), &options) != 0) {
LOG(ERROR) << "Fail to initialize channel";
return -1;
}
std::vector<bthread_t> bids;
std::vector<pthread_t> pids;
if (!FLAGS_use_bthread) {
pids.resize(FLAGS_thread_num);
for (int i = 0; i < FLAGS_thread_num; ++i) {
if (pthread_create(&pids[i], NULL, sender, &channel) != 0) {
LOG(ERROR) << "Fail to create pthread";
return -1;
}
}
} else {
bids.resize(FLAGS_thread_num);
for (int i = 0; i < FLAGS_thread_num; ++i) {
if (bthread_start_background(
&bids[i], NULL, sender, &channel) != 0) {
LOG(ERROR) << "Fail to create bthread";
return -1;
}
}
}
if (FLAGS_dummy_port >= 0) {
brpc::StartDummyServerAt(FLAGS_dummy_port);
}
while (!brpc::IsAskedToQuit()) {
sleep(1);
LOG(INFO) << "Sending EchoRequest at qps=" << g_latency_recorder.qps(1)
<< " latency=" << g_latency_recorder.latency(1);
}
LOG(INFO) << "EchoClient is going to quit";
for (int i = 0; i < FLAGS_thread_num; ++i) {
if (!FLAGS_use_bthread) {
pthread_join(pids[i], NULL);
} else {
bthread_join(bids[i], NULL);
}
}
return 0;
}
example/cascade_echo_c++/echo.proto
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// 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.
syntax="proto2";
package example;
option cc_generic_services = true;
message EchoRequest {
required string message = 1;
optional int32 depth = 2;
};
message EchoResponse {
required string message = 1;
};
service EchoService {
rpc Echo(EchoRequest) returns (EchoResponse);
};
example/cascade_echo_c++/server.cpp
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// 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.
#include <gflags/gflags.h>
#include <butil/logging.h>
#include <brpc/channel.h>
#include <brpc/server.h>
#include "echo.pb.h"
DEFINE_int32(timeout_ms, 100, "RPC timeout in milliseconds");
DEFINE_int32(max_retry, 3, "Max retries(not including the first RPC)");
DEFINE_bool(echo_attachment, true, "Echo attachment as well");
DEFINE_int32(port, 8000, "TCP Port of this server");
DEFINE_string(server, "", "The server to connect, localhost:FLAGS_port as default");
DEFINE_string(load_balancer, "", "The algorithm for load balancing");
DEFINE_bool(use_http, false, "Use http protocol to transfer messages");
DEFINE_int32(idle_timeout_s, -1, "Connection will be closed if there is no "
"read/write operations during the last `idle_timeout_s'");
brpc::Channel channel;
// Your implementation of example::EchoService
namespace example {
class CascadeEchoService : public EchoService {
public:
CascadeEchoService() {}
virtual ~CascadeEchoService() {}
virtual void Echo(google::protobuf::RpcController* cntl_base,
const EchoRequest* request,
EchoResponse* response,
google::protobuf::Closure* done) {
// This object helps you to call done->Run() in RAII style. If you need
// to process the request asynchronously, pass done_guard.release().
brpc::ClosureGuard done_guard(done);
brpc::Controller* cntl =
static_cast<brpc::Controller*>(cntl_base);
if (request->depth() > 0) {
CLOGI(cntl) << "I'm about to call myself for another time, depth=" << request->depth();
example::EchoService_Stub stub(&channel);
example::EchoRequest request2;
example::EchoResponse response2;
brpc::Controller cntl2(cntl->inheritable());
request2.set_message(request->message());
request2.set_depth(request->depth() - 1);
cntl2.set_timeout_ms(FLAGS_timeout_ms);
cntl2.set_max_retry(FLAGS_max_retry);
stub.Echo(&cntl2, &request2, &response2, NULL);
if (cntl2.Failed()) {
CLOGE(&cntl2) << "Fail to send EchoRequest, " << cntl2.ErrorText();
cntl->SetFailed(cntl2.ErrorCode(), "%s", cntl2.ErrorText().c_str());
return;
}
response->set_message(response2.message());
} else {
CLOGI(cntl) << "I'm the last call";
response->set_message(request->message());
}
if (FLAGS_echo_attachment && !FLAGS_use_http) {
// Set attachment which is wired to network directly instead of
// being serialized into protobuf messages.
cntl->response_attachment().append(cntl->request_attachment());
}
}
};
} // namespace example
int main(int argc, char* argv[]) {
// Parse gflags. We recommend you to use gflags as well.
GFLAGS_NAMESPACE::SetUsageMessage("A server that may call itself");
GFLAGS_NAMESPACE::ParseCommandLineFlags(&argc, &argv, true);
// A Channel represents a communication line to a Server. Notice that
// Channel is thread-safe and can be shared by all threads in your program.
brpc::ChannelOptions coption;
if (FLAGS_use_http) {
coption.protocol = brpc::PROTOCOL_HTTP;
}
// Initialize the channel, NULL means using default options.
// options, see `brpc/channel.h'.
if (FLAGS_server.empty()) {
if (channel.Init("localhost", FLAGS_port, &coption) != 0) {
LOG(ERROR) << "Fail to initialize channel";
return -1;
}
} else {
if (channel.Init(FLAGS_server.c_str(), FLAGS_load_balancer.c_str(), &coption) != 0) {
LOG(ERROR) << "Fail to initialize channel";
return -1;
}
}
// Generally you only need one Server.
brpc::Server server;
// For more options see `brpc/server.h'.
brpc::ServerOptions options;
options.idle_timeout_sec = FLAGS_idle_timeout_s;
// Instance of your service.
example::CascadeEchoService echo_service_impl;
// Add the service into server. Notice the second parameter, because the
// service is put on stack, we don't want server to delete it, otherwise
// use brpc::SERVER_OWNS_SERVICE.
if (server.AddService(&echo_service_impl,
brpc::SERVER_DOESNT_OWN_SERVICE) != 0) {
LOG(ERROR) << "Fail to add service";
return -1;
}
// Start the server.
if (server.Start(FLAGS_port, &options) != 0) {
LOG(ERROR) << "Fail to start EchoServer";
return -1;
}
// Wait until Ctrl-C is pressed, then Stop() and Join() the server.
server.RunUntilAskedToQuit();
return 0;
}