initial work of api server

src/apiserver/cmd/main.go

@@ -0,0 +1,136 @@
+package main
+
+/*
+   #include <stdlib.h>
+   #include <stdint.h>
+   #include <errno.h>
+   
+   #include "client.h"
+   #include "netio.h"
+   #include "controller.capnp.h"
+
+   static int init_config(xce_client_config_t *config) {
+      config->nmasters = 1;
+      config->masters[0] = "localhost";
+      config->master_ports[0] = 9990;
+      config->from = "xce_apiserver";
+      config->key = "keepsecret";
+      return 0;
+   }
+
+   static xce_client_config_t config;
+   static struct {
+      xcecli_ctx_t ctx;
+   } xce_api_server_ctx;
+   
+   static uintptr_t go_handler = 0;
+   
+   extern int go_callback(uintptr_t, xce_request_t*, void *);
+   
+   static int xce_apiserver_handler(xce_request_t *req, void *arg) {
+      int rc = -EINVAL;
+
+      if (go_handler != 0) {
+         rc = go_callback(go_handler, req, arg);
+      }
+      
+      return rc;
+   }
+   
+   static int xce_apiserver_init(uintptr_t handler) {
+      int rc;
+
+      init_config(&config);
+
+      go_handler = handler;
+      
+      rc = xcecli_ctx_init(&(xce_api_server_ctx.ctx), &config);
+      if (rc < 0) {
+         return rc;
+      }
+
+      xcecli_set_handler(xce_api_server_ctx.ctx, (xce_request_handler_t)xce_apiserver_handler, NULL);
+
+      rc = xcecli_start(xce_api_server_ctx.ctx);
+      if (rc < 0) {
+         return rc;
+      }
+
+      rc = xcecli_join(xce_api_server_ctx.ctx, HostRole_apiserver, NULL);
+
+      return rc;
+   }
+
+   static void* xce_request_body(xce_request_t *req) {
+      switch (req->body_which) {
+      case Request_body_configpushmsg:
+           return req->body.configpushmsg;
+      case Request_body_datamsg:
+           return req->body.datamsg;
+      default:
+           return NULL;
+      }
+   }
+*/
+import "C"
+
+import (
+	"fmt"
+	"unsafe"
+	"runtime/cgo"
+)
+
+//export go_callback
+func go_callback(h C.uintptr_t, req *C.xce_request_t, args unsafe.Pointer) C.int {
+	fn := cgo.Handle(h).Value().(func(*C.xce_request_t,unsafe.Pointer) C.int)
+	return fn(req, args);
+}
+
+func handle_config(config *C.xce_configdata_t) C.int {
+	switch (config.data_which) {
+	case C.ConfigData_data_clusterconfig:
+		fmt.Printf("cluster configuration received\n")
+	default:
+		//
+		fmt.Printf("unhandled config request %d\n", config.data_which)
+	}
+	return 0
+}
+
+func handle_dataset(dataset *C.dataset_t) C.int {
+	fmt.Printf("handle dataset table %d\n", dataset.table)
+	return 0
+}
+func go_req_handler(request *C.xce_request_t, arg unsafe.Pointer) C.int {
+	var from = C.GoString(request.from.name)
+	var body_which = request.body_which
+	
+	fmt.Println("api server handler called")
+	fmt.Printf("opcode %d body_which %d from %s\n", request.opcode, body_which, from)
+	
+	switch (request.opcode) {
+	case C.OPCode_push:
+		switch (body_which) {
+		case C.Request_body_configpushmsg:
+		// handle push config
+			return handle_config((*C.xce_configdata_t)(unsafe.Pointer(C.xce_request_body(request))))
+		case C.Request_body_datamsg:
+			// handle pushed data msg
+			return handle_dataset((*C.dataset_t)(unsafe.Pointer(C.xce_request_body(request))))
+		default:
+			// something wrong
+		}
+	default:
+	}
+	
+	C.free_Request(request)
+	
+	return 0
+}
+
+func main() {
+	h := cgo.NewHandle(go_req_handler)
+	rc := C.xce_apiserver_init(C.uintptr_t(h))
+	fmt.Printf("rc %d\n", rc);
+	h.Delete()
+}

src/apiserver/meson.build

@@ -0,0 +1,73 @@
+cgo_cflags =''
+cgo_ldflags = ''
+
+if with_debug
+  cgo_cflags += '-fsanitize=address -g -DWITH_DEBUG=1 '
+  cgo_ldflags += '-fsanitize=address -g '
+endif
+
+apiserver_ext_deps = [
+  libxce_dep,
+  c_capnproto_dep,
+  ssl_dep,
+  tinylog_dep,
+  math_dep,
+  rt_dep,
+]
+
+foreach e: apiserver_ext_deps
+  cflags_result = run_command(pkgconfig, '--cflags', e.name(), check: false)
+
+  if cflags_result.returncode() == 0
+    cgo_cflags += ' '
+    cgo_cflags += cflags_result.stdout().strip()
+  endif
+  ldflags_result = run_command(pkgconfig, '--libs', e.name(), check: false)
+
+  if ldflags_result.returncode() == 0
+    cgo_ldflags += ' '
+    cgo_ldflags += ldflags_result.stdout().strip()
+  endif
+endforeach 
+
+apiserver_deps = [
+  apiserver_ext_deps,
+  libxce_dep,
+]
+
+cgo_cflags += ' -I@CURRENT_SOURCE_DIR@/../include -I@CURRENT_SOURCE_DIR@/include -I@BUILD_ROOT@/lib '
+cgo_ldflags += ' -L@BUILD_ROOT@/lib -L@BUILD_ROOT@/apiserver -lxce'
+
+go_env = environment()
+go_env.set('CGO_CFLAGS', cgo_cflags)
+go_env.set('CGO_LDFLAGS', cgo_ldflags)
+go_env.set('BUILDTYPE', get_option('buildtype'))
+go_env.set('FIX_ENVARS','CGO_CFLAGS CGO_LDFLAGS')
+go_env.set('DEPENDENCIES','thread math')
+go_env.set('ENVARS', 'CURRENT_SOURCE_DIR BUILD_ROOT')
+
+#libapiserver_src = [
+#  'src/init.c',
+#]
+
+#libapiserver_incdir = include_directories('../include', 'include', '../lib')
+
+#libapiserver_shared = shared_library('apiserver',
+#                                     libapiserver_src,
+#                                     include_directories: [libapiserver_incdir],
+#                                     dependencies: [libxce_dep],
+#                                     install: true)
+
+apiserver = custom_target('apiserver',
+                          input: 'cmd/main.go',
+                          output: 'apiserver',
+                          command: [env_program,
+                                    'CURRENT_SOURCE_DIR="@CURRENT_SOURCE_DIR@"',
+                                    'BUILD_ROOT="@BUILD_ROOT@"',
+                                    go_build_program,
+                                    '@INPUT@', '@OUTPUT@'],
+                          env: go_env,
+                          depends: [libxce],
+                          install: true,
+                          install_dir: get_option('prefix') / 'bin')
+