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Add an option `BUILD_ETCD_CORE_ONLY=ON/OFF` to select the runtime 

Signed-off-by: Tao He <sighingnow@gmail.com>
This commit is contained in:
Tao He 2023-03-18 23:22:56 +08:00
parent 16a9638e3e
commit c71e87f88a
3 changed files with 85 additions and 59 deletions
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59
CMakeLists.txt
View File

@ -27,6 +27,7 @@ if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
endif() endif()
option(BUILD_SHARED_LIBS "Build etcd-cpp-apiv3 shared libraries" ON) option(BUILD_SHARED_LIBS "Build etcd-cpp-apiv3 shared libraries" ON)
option(BUILD_ETCD_CORE_ONLY "Build etcd-cpp-apiv3 core library (the synchronous runtime) only" OFF)
option(BUILD_ETCD_TESTS "Build etcd-cpp-apiv3 test cases" OFF) option(BUILD_ETCD_TESTS "Build etcd-cpp-apiv3 test cases" OFF)
option(CMAKE_POSITION_INDEPENDENT_CODE "Build etcd-cpp-apiv3 with -fPIC" ON) option(CMAKE_POSITION_INDEPENDENT_CODE "Build etcd-cpp-apiv3 with -fPIC" ON)
option(ETCD_W_STRICT "Build etcd-cpp-apiv3 with -Werror" ON) option(ETCD_W_STRICT "Build etcd-cpp-apiv3 with -Werror" ON)
@ -116,14 +117,6 @@ if(Protobuf_PROTOC_EXECUTABLE)
endif() endif()
endif() endif()
endif() endif()
find_package(cpprestsdk QUIET)
if(cpprestsdk_FOUND)
set(CPPREST_INCLUDE_DIR)
set(CPPREST_LIB cpprestsdk::cpprest)
else()
find_library(CPPREST_LIB NAMES cpprest)
find_path(CPPREST_INCLUDE_DIR NAMES cpprest/http_client.h)
endif()
find_package(gRPC QUIET) find_package(gRPC QUIET)
if(gRPC_FOUND) if(gRPC_FOUND)
@ -152,6 +145,27 @@ endif()
include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/GenerateProtobuf.cmake) include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/GenerateProtobuf.cmake)
add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/proto) add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/proto)
# test cases requires the async runtime
if(BUILD_ETCD_TESTS)
message(STATUS "Building etcd-cpp-apiv3 with tests requires the async runtime, "
"setting BUILD_ETCD_CORE_ONLY to ON ...")
set(BUILD_ETCD_CORE_ONLY ON)
endif()
if (NOT BUILD_ETCD_CORE_ONLY)
find_package(cpprestsdk QUIET)
if(cpprestsdk_FOUND)
set(CPPREST_INCLUDE_DIR)
set(CPPREST_LIB cpprestsdk::cpprest)
else()
find_library(CPPREST_LIB NAMES cpprest)
find_path(CPPREST_INCLUDE_DIR NAMES cpprest/http_client.h)
endif()
else()
set(CPPREST_INCLUDE_DIR)
set(CPPREST_LIB)
endif()
include_directories(SYSTEM ${Boost_INCLUDE_DIR} include_directories(SYSTEM ${Boost_INCLUDE_DIR}
${CPPREST_INCLUDE_DIR} ${CPPREST_INCLUDE_DIR}
${PROTOBUF_INCLUDE_DIRS} ${PROTOBUF_INCLUDE_DIRS}
@ -178,16 +192,19 @@ if(BUILD_ETCD_TESTS)
add_subdirectory(tst) add_subdirectory(tst)
endif() endif()
install (FILES ${CMAKE_CURRENT_SOURCE_DIR}/etcd/Client.hpp install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/etcd/KeepAlive.hpp
${CMAKE_CURRENT_SOURCE_DIR}/etcd/KeepAlive.hpp ${CMAKE_CURRENT_SOURCE_DIR}/etcd/SyncClient.hpp
${CMAKE_CURRENT_SOURCE_DIR}/etcd/SyncClient.hpp ${CMAKE_CURRENT_SOURCE_DIR}/etcd/Response.hpp
${CMAKE_CURRENT_SOURCE_DIR}/etcd/Response.hpp ${CMAKE_CURRENT_SOURCE_DIR}/etcd/Value.hpp
${CMAKE_CURRENT_SOURCE_DIR}/etcd/Value.hpp ${CMAKE_CURRENT_SOURCE_DIR}/etcd/Watcher.hpp
${CMAKE_CURRENT_SOURCE_DIR}/etcd/Watcher.hpp DESTINATION include/etcd)
DESTINATION include/etcd) if(NOT BUILD_ETCD_CORE_ONLY)
install (FILES ${CMAKE_CURRENT_SOURCE_DIR}/etcd/v3/action_constants.hpp install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/etcd/Client.hpp
${CMAKE_CURRENT_SOURCE_DIR}/etcd/v3/Transaction.hpp DESTINATION include/etcd)
DESTINATION include/etcd/v3) endif()
install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/etcd/v3/action_constants.hpp
${CMAKE_CURRENT_SOURCE_DIR}/etcd/v3/Transaction.hpp
DESTINATION include/etcd/v3)
configure_file(etcd-cpp-api-config.in.cmake configure_file(etcd-cpp-api-config.in.cmake
"${PROJECT_BINARY_DIR}/etcd-cpp-api-config.cmake" @ONLY "${PROJECT_BINARY_DIR}/etcd-cpp-api-config.cmake" @ONLY
@ -250,7 +267,7 @@ set(CPACK_DEBIAN_PACKAGE_DEPENDS "libcpprest-dev,
libgrpc++-dev, libgrpc++-dev,
libssl-dev") libssl-dev")
set(CPACK_DEBIAN_PACKAGE_UPSTREAM_COPYRIGHT_YEAR 2016-2021) set(CPACK_DEBIAN_PACKAGE_UPSTREAM_COPYRIGHT_YEAR 2016-2023)
set(CPACK_DEBIAN_PACKAGE_LICENSE bsd) set(CPACK_DEBIAN_PACKAGE_LICENSE bsd)
set(CPACK_DEBIAN_PACKAGE_MAINTAINER "Tao He <sighingnow@gmail.com>") set(CPACK_DEBIAN_PACKAGE_MAINTAINER "Tao He <sighingnow@gmail.com>")
set(CPACK_DEBIAN_PACKAGE_HOMEPAGE "https://github.com/etcd-cpp-apiv3/etcd-cpp-apiv3/") set(CPACK_DEBIAN_PACKAGE_HOMEPAGE "https://github.com/etcd-cpp-apiv3/etcd-cpp-apiv3/")
@ -267,8 +284,8 @@ set(CPACK_DEBIAN_PACKAGE_BUILD_NUMBER_PREFIX "")
set(CPACK_DEBIAN_PACKAGE_BUILD_NUMBER 0) set(CPACK_DEBIAN_PACKAGE_BUILD_NUMBER 0)
set(CPACK_DEBIAN_PACKAGE_DISTRIBUTION "focal") set(CPACK_DEBIAN_PACKAGE_DISTRIBUTION "focal")
set(DPUT_HOST "ppa:graphscope/etcd-cpp-api") set(DPUT_HOST "ppa:etcd-cpp-apiv3/etcd-cpp-api")
set(DPUT_SNAPSHOT_HOST "ppa:graphscope/etcd-cpp-api") set(DPUT_SNAPSHOT_HOST "ppa:etcd-cpp-apiv3/etcd-cpp-api")
find_program(DEBUILD_EXECUTABLE debuild) find_program(DEBUILD_EXECUTABLE debuild)
find_program(DPUT_EXECUTABLE dput) find_program(DPUT_EXECUTABLE dput)

31
README.md
View File

@ -92,28 +92,27 @@ Github when you encounter problems when working with etcd 3.x releases.
There are various discussion about whether to support a user-transparent multi-thread executor in There are various discussion about whether to support a user-transparent multi-thread executor in
the background, or, leaving the burden of thread management to the user (e.g., see the background, or, leaving the burden of thread management to the user (e.g., see
[issue#100](https://github.com/etcd-cpp-apiv3/etcd-cpp-apiv3/issues/100) for more discussion about [issue#100](https://github.com/etcd-cpp-apiv3/etcd-cpp-apiv3/issues/100) and
[issue#207](https://github.com/etcd-cpp-apiv3/etcd-cpp-apiv3/issues/207) for more discussion about
the implementation of underlying thread model). the implementation of underlying thread model).
The _etcd-cpp-apiv3_ library supports both synchronous and asynchronous runtime, in two separate The _etcd-cpp-apiv3_ library supports both synchronous and asynchronous runtime, controlled by the
library as follows: cmake option `BUILD_ETCD_CORE_ONLY=ON/OFF` (defaults to `OFF`).
- **etcd-cpp-api-core**: the synchronous runtime, provides a blocking-style API and the users are responsible - When it is set as `OFF`: the library artifact name will be `libetcd-cpp-api.{a,so,dylib,lib,dll}` and a
for handling dispatch the request into separate thread to avoid been blocked by waiting for response. cmake target `etcd-cpp-api` is exported and pointed to it. The library provides both synchronous runtime
- target found by cmake: `ETCD_CPP_CORE_LIBRARIES` (`etcd/SyncClient.hpp`) and asynchronous runtime (`etcd/Client.hpp`), and the `cpprestsdk` is a
required dependency.
- **etcd-cpp-api**: the asynchronous runtime backed by the `pplx` library from - When it is set as `ON`: the library artifact name will be `libetcd-cpp-api-core.{a,so,dylib,lib,dll}`
[cpprestsdk](https://github.com/microsoft/cpprestsdk), where a `boost::asio::io_context` and a pool and a cmake target `etcd-cpp-api` is exported and pointed to it. The library provides only the
of threads is used to run the asynchronous operations in the background. By default the number of synchronous runtime (`etcd/SyncClient.hpp`), and the `cpprestsdk` won't be required.
threads in the thread pool equals to `std::thread::hardware_concurrency()`.
- target found by cmake: `ETCD_CPP_LIBRARIES`
We encourage the users to use the asynchronous runtime by default, as it provides more flexibility We encourage the users to use the asynchronous runtime by default, as it provides more flexibility
and convenient APIs and less possibilities for errors that block the main thread. However, please note and convenient APIs and less possibilities for errors that block the main thread. Note that the
that the asynchronous runtime will setup a thread pool in the background. asynchronous runtime requires `cpprestsdk` and will setup a thread pool in the background.
Note that `etcd-cpp-api-core` and `etcd-cpp-api` are two separate target and don't depends on each other. **Warning: users cannot link both `libetcd-cpp-api.{a,so,dylib,lib,dll}` and `libetcd-cpp-api-core.{a,so,dylib,lib,dll}`
You should depends on either of them in your program. to same program.**
## Usage ## Usage

54
src/CMakeLists.txt
View File

@ -28,29 +28,39 @@ target_link_libraries(etcd-cpp-api-core-objects PUBLIC
${GRPC_LIBRARIES} ${GRPC_LIBRARIES}
) )
# add the core library, includes the sycnhronous client only if(BUILD_ETCD_CORE_ONLY)
add_library(etcd-cpp-api-core $<TARGET_OBJECTS:etcd-cpp-api-core-objects>) # add the core library, includes the sycnhronous client only
use_cxx(etcd-cpp-api-core) add_library(etcd-cpp-api-core $<TARGET_OBJECTS:etcd-cpp-api-core-objects>)
target_link_libraries(etcd-cpp-api-core PUBLIC use_cxx(etcd-cpp-api-core)
${Boost_LIBRARIES} target_link_libraries(etcd-cpp-api-core PUBLIC
${PROTOBUF_LIBRARIES} ${Boost_LIBRARIES}
${OPENSSL_LIBRARIES} ${PROTOBUF_LIBRARIES}
${GRPC_LIBRARIES} ${OPENSSL_LIBRARIES}
) ${GRPC_LIBRARIES}
include_generated_protobuf_files(etcd-cpp-api-core) )
include_generated_protobuf_files(etcd-cpp-api-core)
else()
# add the client with asynchronus client
add_library(etcd-cpp-api $<TARGET_OBJECTS:etcd-cpp-api-core-objects>
"${CMAKE_CURRENT_SOURCE_DIR}/Client.cpp")
use_cxx(etcd-cpp-api)
target_link_libraries(etcd-cpp-api PUBLIC
${Boost_LIBRARIES}
${CPPREST_LIB} # n.b.: the asynchronous client requires pplx in cpprestsdk
${PROTOBUF_LIBRARIES}
${OPENSSL_LIBRARIES}
${GRPC_LIBRARIES}
)
include_generated_protobuf_files(etcd-cpp-api)
endif()
# add the client with asynchronus client if(BUILD_ETCD_CORE_ONLY)
add_library(etcd-cpp-api $<TARGET_OBJECTS:etcd-cpp-api-core-objects> add_library(etcd-cpp-api INTERFACE)
"${CMAKE_CURRENT_SOURCE_DIR}/Client.cpp") target_link_libraries(etcd-cpp-api INTERFACE etcd-cpp-api-core)
use_cxx(etcd-cpp-api) else()
target_link_libraries(etcd-cpp-api PUBLIC add_library(etcd-cpp-api-core INTERFACE)
${Boost_LIBRARIES} target_link_libraries(etcd-cpp-api-core INTERFACE etcd-cpp-api)
${CPPREST_LIB} # n.b.: the asynchronous client requires pplx in cpprestsdk endif()
${PROTOBUF_LIBRARIES}
${OPENSSL_LIBRARIES}
${GRPC_LIBRARIES}
)
include_generated_protobuf_files(etcd-cpp-api)
if("${CMAKE_VERSION}" VERSION_LESS "3.14") if("${CMAKE_VERSION}" VERSION_LESS "3.14")
install(TARGETS etcd-cpp-api-core etcd-cpp-api install(TARGETS etcd-cpp-api-core etcd-cpp-api