feat(backup): add hdfs as an alternative backup provider

src/block_service/CMakeLists.txt

@@ -19,5 +19,6 @@ set(MY_BOOST_LIBS Boost::system Boost::filesystem)
 dsn_add_static_library()
 
 add_subdirectory(fds)
+add_subdirectory(hdfs)
 add_subdirectory(local)
 add_subdirectory(test)

src/block_service/block_service_manager.cpp

@@ -4,6 +4,7 @@
 
 #include "block_service_manager.h"
 #include "block_service/fds/fds_service.h"
+#include "block_service/hdfs/hdfs_service.h"
 #include "block_service/local/local_service.h"
 
 #include <dsn/dist/fmt_logging.h>
@@ -21,6 +22,10 @@ block_service_registry::block_service_registry()
         "fds_service", block_filesystem::create<fds_service>, PROVIDER_TYPE_MAIN);
     dassert(ans, "register fds_service failed");
 
+    ans = utils::factory_store<block_filesystem>::register_factory(
+        "hdfs_service", block_filesystem::create<hdfs_service>, PROVIDER_TYPE_MAIN);
+    dassert(ans, "register hdfs_service failed");
+
     ans = utils::factory_store<block_filesystem>::register_factory(
         "local_service", block_filesystem::create<local_service>, PROVIDER_TYPE_MAIN);
     dassert(ans, "register local_service failed");

src/block_service/hdfs/CMakeLists.txt

@@ -0,0 +1,28 @@
+set(MY_PROJ_NAME dsn.block_service.hdfs)
+
+#Source files under CURRENT project directory will be automatically included.
+#You can manually set MY_PROJ_SRC to include source files under other directories.
+set(MY_PROJ_SRC "")
+
+#Search mode for source files under CURRENT project directory ?
+#"GLOB_RECURSE" for recursive search
+#"GLOB" for non - recursive search
+set(MY_SRC_SEARCH_MODE "GLOB")
+
+set(MY_PROJ_LIBS "")
+
+#Extra files that will be installed
+set(MY_BINPLACES "")
+
+dsn_add_static_library()
+
+set(LIBS hdfs)
+find_package(JNI)
+if (JNI_FOUND)
+  message (STATUS "JAVA_JVM_LIBRARY=${JAVA_JVM_LIBRARY}")
+  set(LIBS ${LIBS} ${JAVA_JVM_LIBRARY})
+else (JNI_FOUND)
+  message (FATAL_ERROR "JNI is required but not found, please make sure
+    jdk is installed and JAVA_HOME is set.")
+endif (JNI_FOUND)
+target_link_libraries(${MY_PROJ_NAME} PUBLIC ${LIBS})