Install and deploy oblogmsg

This topic describes what oblogmsg is and how to install and deploy it.

oblogmsg

oblogmsg is a message format used by obcdc, the incremental data collection module of OceanBase Database, to export incremental data. oblogmsg supports writing incremental data of different types in OceanBase Database. It also supports data serialization and deserialization.

Considerations

Prerequisites

• You have installed CMake: 3.20.0 or later.
• You have installed g++ that supports C++11 standard

Use the source code to make oblogmsg a dependency (recommended)

• Use the git submodule method to make oblogmsg a submodule of the project.
• In the CMakeLists.txt file of the project, run the add_subdirectory(submodule_path_to_oblogmsg) command to make the project depend on oblogmsg. After you run this command, two targets are provided: oceanbase::oblogmsg_shared and oceanbase::oblogmsg_static.
• In the CMakeLists.txt file of the project, run the target_link_libraries(t1 PRIVATE oceanbase::oblogmsg_shared) or target_link_libraries(t1 PRIVATE oceanbase::oblogmsg_static) command on Target t1 that needs to depend on oblogmsg.

Use the compiled oblogmsg library as a dependency

• Compile and install oblogmsg

  # Compile ologmsg
  git clone https://github.com/oceanbase/oblogmsg.git
  mkdir oblogmsg-build
  cd oblogmsg-build
  cmake -S ../oblogmsg -B .
  cmake --build .
  
  # Local installation
  cmake --install . --prefix=${OBLOGMSG_INSTALL_PATH}
  

• Make the compiled and installed oblogmsg a dependency of the project

  • In the CMakeLists.txt file of the project, run the set(CMAKE_PREFIX_PATH $ENV{OBLOGMSG_INSTALL_PATH} ${CMAKE_PREFIX_PATH}) command to set the search path for the oblogmsg library.
  • Run the find_package(oblogmsg REQUIRED) command to load oblogmsg. After you run this command, two targets are provided: oceanbase::oblogmsg_shared and oceanbase::oblogmsg_static.
  • In the CMakeLists.txt file of the project, run the target_link_libraries(t1 PRIVATE oceanbase::oblogmsg_shared) or target_link_libraries(t1 PRIVATE oceanbase::oblogmsg_static) command on Target t1 that needs to depend on oblogmsg.