diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5f501b4692b1af799c7ce4ccb70bc15352eccb57..76386eeb049506259cf53f42a1b42af21cc1387d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -128,6 +128,7 @@ ELSE(DEFINED PackageOnly)
add_subdirectory(cmdline)
add_subdirectory(xroot_plugins)
+ add_subdirectory(frontend_svc)
add_subdirectory(catalogue)
add_subdirectory(common)
diff --git a/eos_cta/CMakeLists.txt b/eos_cta/CMakeLists.txt
index b10e0c446887766787e91ddbb7515e8364868106..f44e0d160d18d72bba5fcac24cd4254e55cd8455 100644
--- a/eos_cta/CMakeLists.txt
+++ b/eos_cta/CMakeLists.txt
@@ -24,23 +24,31 @@ set(PROTOBUF_EOS_CTA_DIR ${XRD_SSI_PB_DIR}/eos_cta/protobuf)
file(GLOB ProtoFilesEosCta "${PROTOBUF_EOS_CTA_DIR}/*.proto")
set(PROTOBUF_MIGRATION_DIR ${PROJECT_SOURCE_DIR}/migration/grpc-proto/protobuf)
file(GLOB ProtoFilesMigration "${PROTOBUF_MIGRATION_DIR}/*.proto")
+set(PROTOBUF_FRONTEND_DIR ${PROJECT_SOURCE_DIR}/frontend_svc/grpc-proto/protobuf)
+file(GLOB ProtoFilesFrontendCta "${PROTOBUF_FRONTEND_DIR}/*.proto")
# Compile protobufs
-set(PROTOBUF3_INCLUDE_PATH ${PROTOBUF_EOS_CTA_DIR}:${PROTOBUF_MIGRATION_DIR})
+set(PROTOBUF3_INCLUDE_PATH ${PROTOBUF_EOS_CTA_DIR}:${PROTOBUF_MIGRATION_DIR}:${PROTOBUF_FRONTEND_DIR}:${PROTOBUF3_INCLUDE_DIRS})
PROTOBUF3_GENERATE_CPP(ProtoSourcesEosCta ProtoHeadersEosCta ${ProtoFilesEosCta})
PROTOBUF3_GENERATE_CPP(ProtoSourcesMigration ProtoHeadersMigration ${ProtoFilesMigration})
+PROTOBUF3_GENERATE_CPP(ProtoSourcesFrontendCta ProtoHeadersFrontendCta ${ProtoFilesFrontendCta})
# Compile gRPC code
set(GRPC_PROTOBUF_PATH "${CMAKE_BINARY_DIR}/eos_cta/")
grpc_generate_cpp(ProtoGrpcSourcesMigration ProtoGrpcHeadersMigration ${GRPC_PROTOBUF_PATH} ${ProtoFilesMigration})
+# depends on CTA_EOS definitions
+set(PROTOBUF3_IMPORT_DIRS "${PROTOBUF_EOS_CTA_DIR}:${PROTOBUF3_INCLUDE_DIRS}")
+grpc_generate_cpp(ProtoGrpcSourcesFrontendCta ProtoGrpcHeadersFrontendCta ${GRPC_PROTOBUF_PATH} ${ProtoFilesFrontendCta})
set_source_files_properties(
${ProtoSourcesEosCta} ${ProtoHeadersEosCta}
${ProtoSourcesMigration} ${ProtoHeadersMigration}
${ProtoGrpcSourcesMigration} ${ProtoGrpcHeadersMigration}
+ ${ProtoSourcesFrontendCta} ${ProtoHeadersFrontendCta}
+ ${ProtoGrpcSourcesFrontendCta} ${ProtoGrpcHeadersFrontendCta}
PROPERTIES GENERATED TRUE)
-foreach(PROTO_SRC ${ProtoSourcesEosCta} ${ProtoSourcesMigration} ${ProtoGrpcSourcesMigration})
+foreach(PROTO_SRC ${ProtoSourcesEosCta} ${ProtoSourcesMigration} ${ProtoGrpcSourcesMigration} ${ProtoSourcesFrontendCta} ${ProtoGrpcSourcesFrontendCta})
set_property(SOURCE ${PROTO_SRC} PROPERTY COMPILE_FLAGS " -Wno-missing-field-initializers -fPIC -Wno-narrowing -Wno-implicit-fallthrough")
endforeach(PROTO_SRC)
@@ -55,3 +63,11 @@ set_target_properties(EosMigration PROPERTIES
LINKER_LANGUAGE CXX
POSITION_INDEPENDENT_CODE TRUE)
target_link_libraries(EosMigration ${PROTOBUF3_GRPC_LIBRARIES})
+
+add_library(CtaGRpc ${ProtoSourcesFrontendCta} ${ProtoGrpcSourcesFrontendCta})
+set_target_properties(CtaGRpc PROPERTIES
+ LINKER_LANGUAGE CXX
+ POSITION_INDEPENDENT_CODE TRUE)
+target_link_libraries(CtaGRpc ${PROTOBUF3_GRPC_LIBRARIES})
+
+add_dependencies(CtaGRpc XrdSsiPbEosCta)
\ No newline at end of file
diff --git a/frontend_svc/CMakeLists.txt b/frontend_svc/CMakeLists.txt
new file mode 100644
index 0000000000000000000000000000000000000000..99784ce9ea7019fbb9b59bf3a23cd190a5488666
--- /dev/null
+++ b/frontend_svc/CMakeLists.txt
@@ -0,0 +1,18 @@
+# @project The CERN Tape Archive (CTA)
+# @copyright 2021 DESY
+# @license This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+cmake_minimum_required (VERSION 2.6)
+
+add_subdirectory(gRPC)
diff --git a/frontend_svc/gRPC/CMakeLists.txt b/frontend_svc/gRPC/CMakeLists.txt
new file mode 100644
index 0000000000000000000000000000000000000000..f23f78ff266527fbe6819aa5d24b2ef9388bb911
--- /dev/null
+++ b/frontend_svc/gRPC/CMakeLists.txt
@@ -0,0 +1,27 @@
+# @project The CERN Tape Archive (CTA)
+# @copyright Copyright(C) 2021 DESY
+# @license This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+cmake_minimum_required (VERSION 2.6)
+
+find_package(Protobuf3 REQUIRED)
+
+include_directories(${CMAKE_BINARY_DIR}/eos_cta
+ ${PROTOBUF3_INCLUDE_DIRS})
+
+add_executable(frontend-grpc-svc FrontendGRpcSvc.cpp)
+target_link_libraries(frontend-grpc-svc CtaGRpc
+ ${PROTOBUF3_LIBRARIES} ${GRPC_GRPC++_LIBRARY}
+ ctascheduler ctacommon ctaobjectstore ctacatalogue)
+set_property(TARGET frontend-grpc-svc APPEND PROPERTY INSTALL_RPATH ${PROTOBUF3_RPATH})
\ No newline at end of file
diff --git a/frontend_svc/gRPC/FrontendGRpcSvc.cpp b/frontend_svc/gRPC/FrontendGRpcSvc.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..985e38fa9fb7a39e24d99cb037e6b56bcd750b45
--- /dev/null
+++ b/frontend_svc/gRPC/FrontendGRpcSvc.cpp
@@ -0,0 +1,76 @@
+/*
+ * @project The CERN Tape Archive (CTA)
+ * @copyright Copyright(C) 2021 CERN
+ * @copyright Copyright(C) 2021 DESY
+ * @license This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "FrontendGRpcSvc.h"
+#include "version.h"
+
+using grpc::Server;
+using grpc::ServerBuilder;
+using grpc::ServerContext;
+using grpc::Status;
+
+using cta::rpc::CtaRpc;
+
+#include "common/log/SyslogLogger.hpp"
+#include "common/log/StdoutLogger.hpp"
+#include "common/log/FileLogger.hpp"
+#include "common/log/LogLevel.hpp"
+
+
+class CtaRpcImpl final : public CtaRpc::Service {
+
+ Status Version(::grpc::ServerContext* context, const ::google::protobuf::Empty* request, ::cta::admin::Version* response) override {
+ response->set_cta_version(CTA_VERSION);
+ response->set_xrootd_ssi_protobuf_interface_version("gPRC-frontend v0.0.1");
+ return Status::OK;
+ }
+};
+
+
+using namespace cta;
+
+int main(const int argc, char *const *const argv) {
+
+ std::unique_ptr <cta::log::Logger> m_log;
+ m_log.reset(new log::StdoutLogger("cta-dev", "cta-grpc-frontend"));
+
+ log::LogContext lc(*m_log);
+
+ std::string server_address("0.0.0.0:17017");
+
+ CtaRpcImpl svc;
+
+// grpc::EnableDefaultHealthCheckService(true);
+// grpc::reflection::InitProtoReflectionServerBuilderPlugin();
+
+ ServerBuilder builder;
+ // Listen on the given address without any authentication mechanism.
+ builder.AddListeningPort(server_address, grpc::InsecureServerCredentials());
+ // Register "service" as the instance through which we'll communicate with
+ // clients. In this case it corresponds to an *synchronous* service.
+ builder.RegisterService(&svc);
+ // Finally assemble the server.
+ std::unique_ptr <Server> server(builder.BuildAndStart());
+
+ lc.log(log::INFO, "Listening on socket address: " + server_address);
+
+ // Wait for the server to shutdown. Note that some other thread must be
+ // responsible for shutting down the server for this call to ever return.
+ server->Wait();
+
+
+}
\ No newline at end of file
diff --git a/frontend_svc/gRPC/FrontendGRpcSvc.h b/frontend_svc/gRPC/FrontendGRpcSvc.h
new file mode 100644
index 0000000000000000000000000000000000000000..1cc74194dd7fb38f08b15f40f193b1dc50453ec5
--- /dev/null
+++ b/frontend_svc/gRPC/FrontendGRpcSvc.h
@@ -0,0 +1,22 @@
+
+#ifndef CTA_FRONTENDGRPCSVC_H
+#define CTA_FRONTENDGRPCSVC_H
+
+
+#include <grpcpp/grpcpp.h>
+
+#include "catalogue/CatalogueFactoryFactory.hpp"
+#include "rdbms/Login.hpp"
+#include <common/Configuration.hpp>
+#include <common/utils/utils.hpp>
+#include <scheduler/Scheduler.hpp>
+#include <scheduler/OStoreDB/OStoreDBInit.hpp>
+#include "common/log/SyslogLogger.hpp"
+#include "common/log/StdoutLogger.hpp"
+#include "common/log/FileLogger.hpp"
+#include "common/log/LogLevel.hpp"
+
+#include "cta_rpc.grpc.pb.h"
+
+
+#endif //CTA_FRONTENDGRPCSVC_H
diff --git a/frontend_svc/grpc-proto/protobuf/cta_rpc.proto b/frontend_svc/grpc-proto/protobuf/cta_rpc.proto
new file mode 100644
index 0000000000000000000000000000000000000000..15d1d722eb4fd2fc6132a9ffed26aa7169613c20
--- /dev/null
+++ b/frontend_svc/grpc-proto/protobuf/cta_rpc.proto
@@ -0,0 +1,18 @@
+
+syntax = "proto3";
+
+option java_multiple_files = true;
+option java_package = "ch.cern.cta.rpc";
+option optimize_for = CODE_SIZE;
+package cta.rpc;
+
+import "google/protobuf/empty.proto";
+
+import "cta_admin.proto";
+
+//
+// gRPC interface to CTA frontend
+//
+service CtaRpc {
+ rpc Version (google.protobuf.Empty) returns (cta.admin.Version) {}
+}
\ No newline at end of file