diff --git a/include/stellar/module_manager.h b/include/stellar/module_manager.h
index a626575..82c000c 100644
--- a/include/stellar/module_manager.h
+++ b/include/stellar/module_manager.h
@@ -15,6 +15,7 @@ void * stellar_module_get_ctx(struct stellar_module *mod);
 void stellar_module_set_ctx(struct stellar_module *mod, void *ctx);
 
 const char *stellar_module_get_name(struct stellar_module* mod);
+void stellar_module_set_name(struct stellar_module* mod, const char *name);
 
 struct stellar_module_manager;
 
@@ -24,10 +25,10 @@ typedef void module_on_exit_func(struct stellar_module_manager *mod_mgr, struct
 struct stellar_module_manager *stellar_module_manager_new(const char *module_spec_toml_path, int max_thread_num, struct mq_schema *mq_schema);
 void stellar_module_manager_free(struct stellar_module_manager *mod_mgr);
 
-struct stellar_module *stellar_module_manager_get_module(struct stellar_module_manager *mod_mgr, const char *module_name); 
-
 void stellar_module_manager_register_thread(struct stellar_module_manager* mod_mgr, int thread_id, struct mq_runtime *mq_rt);
 
+struct stellar_module *stellar_module_manager_get_module(struct stellar_module_manager *mod_mgr, const char *module_name); 
+
 // return -1 on error
 int stellar_module_manager_get_thread_id(struct stellar_module_manager* mod_mgr);
 int stellar_module_manager_get_max_thread_num(struct stellar_module_manager* mod_mgr);
diff --git a/infra/module_manager/module_manager.c b/infra/module_manager/module_manager.c
index 53f906c..077231e 100644
--- a/infra/module_manager/module_manager.c
+++ b/infra/module_manager/module_manager.c
@@ -2,25 +2,32 @@
 
 #include "stellar/module_manager.h"
 #include "stellar/utils.h"
-#include "toml/toml.h"
 #include <dlfcn.h>
 #include <stdbool.h>
 
 
 UT_icd module_specs_icd = {sizeof(struct module_specific), NULL, NULL, NULL};
 
-static struct module_specific *module_specs_load(const char *toml_conf_path, int *mod_num)
+/*******************************************
+ * module manager internal API *
+ *******************************************/
+
+toml_table_t *toml_parse_file_path(const char *toml_conf_path)
 {
-	*mod_num = 0;
+	if(toml_conf_path==NULL)return NULL;
     FILE* fp = fopen(toml_conf_path, "r");
 	if(fp==NULL)return NULL;
     char errbuf[256];
     toml_table_t* conf = toml_parse_file(fp, errbuf, sizeof(errbuf));
     fclose(fp);	
-    if (!conf) {
-        fprintf(stderr, "Error parsing toml: %s\n", errbuf);
-        return NULL;
-    }	
+	if(conf==NULL) fprintf(stderr, "Error parsing toml: %s\n", errbuf);
+	return conf;
+}	
+
+struct module_specific *module_specs_load(toml_table_t* conf, int *mod_num)
+{
+	if(conf==NULL|| mod_num==NULL) return NULL;
+	*mod_num = 0;
 	struct module_specific* mod_spec=NULL;
     toml_array_t* mod_array = toml_array_in(conf, "module");
 	if(mod_array==NULL)goto MODULE_SPEC_LOAD_ERROR;
@@ -47,62 +54,62 @@ static struct module_specific *module_specs_load(const char *toml_conf_path, int
             goto MODULE_SPEC_LOAD_ERROR;
         }
 
-        mod_spec[i].load_cb = (module_on_init_func *) dlsym(handle, init_func_name);
-        if (!mod_spec[i].load_cb) {
+        mod_spec[i].on_init_cb = (module_on_init_func *) dlsym(handle, init_func_name);
+        if (!mod_spec[i].on_init_cb) {
             fprintf(stderr, "Could not load init function %s: %s\n", init_func_name, dlerror());
         }
 
-        mod_spec[i].unload_cb = (module_on_exit_func *) dlsym(handle, exit_func_name);
-        if (!mod_spec[i].unload_cb) {
+        mod_spec[i].on_exit_cb = (module_on_exit_func *) dlsym(handle, exit_func_name);
+        if (!mod_spec[i].on_exit_cb) {
             fprintf(stderr, "Could not load exit function %s: %s\n", exit_func_name, dlerror());
         }
         FREE(path);
         FREE(init_func_name);
         FREE(exit_func_name);
     }
-    toml_free(conf);
     return mod_spec;	
 MODULE_SPEC_LOAD_ERROR:
-	toml_free(conf);
 	if(mod_spec)FREE(mod_spec);
 	*mod_num=0;
 	return NULL;	
 }
 
+struct stellar_module_manager *stellar_module_manager_new_with_toml(toml_table_t *conf, int max_thread_num, struct mq_schema *mq_schema)
+{
+	int spec_num = 0;
+	struct module_specific *specs = module_specs_load(conf, &spec_num);
+	struct stellar_module_manager *mod_mgr = CALLOC(struct stellar_module_manager, 1);
+	if(spec_num > 0)
+	{
+		utarray_new(mod_mgr->schema.module_specs_array,&module_specs_icd);
+		utarray_reserve(mod_mgr->schema.module_specs_array, spec_num);
+	}
+	mod_mgr->schema.max_thread_num=max_thread_num;
+	mod_mgr->schema.mq_schema=mq_schema;
+
+	// TODO: store module specific data in hash
+	for(int i = 0; i < spec_num; i++)
+	{
+		if (specs[i].on_init_cb != NULL)
+		{
+			//TODO: duplicate check mod_name
+			specs[i].mod=specs[i].on_init_cb(mod_mgr);
+			utarray_push_back(mod_mgr->schema.module_specs_array, &specs[i]);
+		}
+	}
+	FREE(specs);
+	return mod_mgr;
+}
+
 /*******************************************
  * stellar module manager API *
  *******************************************/
 
 struct stellar_module_manager *stellar_module_manager_new(const char *module_spec_toml_path, int max_thread_num, struct mq_schema *mq_schema)
 {
-	int spec_num;
-	struct module_specific *specs = module_specs_load(module_spec_toml_path, &spec_num);
-	if(spec_num < 0)
-	{
-		return NULL;
-	}
-	struct stellar_module_manager *mod_mgr = CALLOC(struct stellar_module_manager, 1);
-	if(spec_num > 0)
-	{
-		utarray_new(mod_mgr->schema.module_specs_array,&module_specs_icd);
-		utarray_reserve(mod_mgr->schema.module_specs_array, spec_num);
-	}
-
-	mod_mgr->schema.max_thread_num=max_thread_num;
-	mod_mgr->schema.mq_schema=mq_schema;
-
-	// TODO: store module specific data in hash
-
-	for(int i = 0; i < spec_num; i++)
-	{
-		if (specs[i].load_cb != NULL)
-		{
-			//TODO: duplicate check mod_name
-			specs[i].mod=specs[i].load_cb(mod_mgr);
-			utarray_push_back(mod_mgr->schema.module_specs_array, &specs[i]);
-		}
-	}
-	FREE(specs);
+	toml_table_t *conf = toml_parse_file_path(module_spec_toml_path);
+	struct stellar_module_manager *mod_mgr=stellar_module_manager_new_with_toml(conf, max_thread_num, mq_schema);
+	if(conf)toml_free(conf);
 	return mod_mgr;
 }
 
@@ -114,8 +121,8 @@ void stellar_module_manager_free(struct stellar_module_manager *mod_mgr)
     {
         while ((p = (struct module_specific *)utarray_next(mod_mgr->schema.module_specs_array, p)))
         {
-            if (p->unload_cb)
-                p->unload_cb(mod_mgr, p->mod);
+            if (p->on_exit_cb)
+                p->on_exit_cb(mod_mgr, p->mod);
         }
         utarray_free(mod_mgr->schema.module_specs_array);
     }
@@ -180,17 +187,20 @@ void stellar_module_manager_register_thread(struct stellar_module_manager* mod_m
 
 struct stellar_module *stellar_module_manager_get_module(struct stellar_module_manager *mod_mgr, const char *module_name)
 {
-	if(mod_mgr==NULL)return NULL;
+	if(mod_mgr==NULL || module_name == NULL)return NULL;
 	struct module_specific *p=NULL;
 	if (mod_mgr->schema.module_specs_array)
 	{
 		while ((p = (struct module_specific *)utarray_next(mod_mgr->schema.module_specs_array, p)))
 		{
-			if(strcmp(p->mod->name, module_name)==0)
-			{
-				return p->mod;
-			}
-		}
+            if (p->mod)
+            {
+                if (strcmp(p->mod->name, module_name) == 0)
+                {
+                    return p->mod;
+                }
+            }
+        }
 	}
 	return NULL;
 } 
@@ -232,3 +242,10 @@ const char *stellar_module_get_name(struct stellar_module* mod)
 	if(mod==NULL)return NULL;
 	return mod->name;
 }
+
+void stellar_module_set_name(struct stellar_module* mod, const char *name)
+{
+	if(mod==NULL)return;
+	strncpy(mod->name, name, NAME_MAX);
+	return;
+}
\ No newline at end of file
diff --git a/infra/module_manager/module_manager_interna.h b/infra/module_manager/module_manager_interna.h
index af045e4..6ab1558 100644
--- a/infra/module_manager/module_manager_interna.h
+++ b/infra/module_manager/module_manager_interna.h
@@ -32,10 +32,15 @@ struct stellar_module_manager
 struct module_specific
 {
 	struct stellar_module *mod;
-	module_on_init_func *load_cb;
-	module_on_exit_func *unload_cb;
+	module_on_init_func *on_init_cb;
+	module_on_exit_func *on_exit_cb;
 }__attribute__((aligned(sizeof(void*))));
 
+#include "toml/toml.h"
+
+toml_table_t *toml_parse_file_path(const char *toml_conf_path) __attribute__((visibility("hidden")));
+struct module_specific *module_specs_load(toml_table_t* conf, int *mod_num) __attribute__((visibility("hidden")));
+struct stellar_module_manager *stellar_module_manager_new_with_toml(toml_table_t *conf, int max_thread_num, struct mq_schema *mq_schema) __attribute__((visibility("hidden")));
 #ifdef __cplusplus
 }
 #endif
\ No newline at end of file
diff --git a/infra/module_manager/test/CMakeLists.txt b/infra/module_manager/test/CMakeLists.txt
index d1aae36..98be279 100644
--- a/infra/module_manager/test/CMakeLists.txt
+++ b/infra/module_manager/test/CMakeLists.txt
@@ -3,8 +3,7 @@ add_executable(gtest_module_manager
 )
 
 
-include_directories(${CMAKE_SOURCE_DIR}/infra/plugin_manager/)
-include_directories(${CMAKE_SOURCE_DIR}/infra/tuple/)
+include_directories(${CMAKE_SOURCE_DIR}/infra/module_manager/)
 
 target_link_libraries(
   gtest_module_manager
diff --git a/infra/module_manager/test/gtest_module_manager_main.cpp b/infra/module_manager/test/gtest_module_manager_main.cpp
index de5dfa7..625ec1b 100644
--- a/infra/module_manager/test/gtest_module_manager_main.cpp
+++ b/infra/module_manager/test/gtest_module_manager_main.cpp
@@ -6,23 +6,195 @@
 #include "module_manager/module_manager_interna.h"
 
 /***********************************
- * TEST PLUGIN MANAGER INIT & EXIT *
+ * TEST MODUEL MANAGER INTERNAL API *
+ ***********************************/
+TEST(module_manager_internal, toml_parse_filepath_null) {
+	toml_table_t *conf = toml_parse_file_path("");
+	EXPECT_TRUE(conf==NULL);
+}
+
+TEST(module_manager_internal, toml_parse_filepath_dev_null) {
+	toml_table_t *conf = toml_parse_file_path("/dev/null");
+	EXPECT_TRUE(conf!=NULL);
+	toml_free(conf);
+}
+
+extern "C" struct stellar_module *gtest_mock_init(struct stellar_module_manager *mod_mgr){return NULL;}
+extern "C" void gtest_mock_exit(struct stellar_module_manager *mod_mgr, struct stellar_module *mod){}
+const char *gtest_mock_spec_toml = 
+    "[[module]]\n"
+    "path = \"\"\n"
+    "init = \"gtest_mock_init\"\n"
+    "exit = \"gtest_mock_exit\"\n";
+
+TEST(module_manager_internal, module_specs_load) {
+
+	toml_table_t *conf = toml_parse((char*)gtest_mock_spec_toml, NULL, 0);
+	EXPECT_TRUE(conf!=NULL);
+
+	int mod_num=0;
+	struct module_specific *specs=module_specs_load(conf, &mod_num);
+	EXPECT_EQ(mod_num, 1);
+
+	EXPECT_EQ(specs[0].on_init_cb, gtest_mock_init);
+	EXPECT_EQ(specs[0].on_exit_cb, gtest_mock_exit);
+
+	free(specs);
+	toml_free(conf);
+
+}
+
+TEST(module_manager_internal, stellar_module_manager_new_with_toml) {
+
+	struct mq_schema *mq_schema=NULL;
+	toml_table_t *conf = toml_parse((char*)gtest_mock_spec_toml, NULL, 0);
+	EXPECT_TRUE(conf!=NULL);
+
+	struct stellar_module_manager *mod_mgr=stellar_module_manager_new_with_toml(conf, 10, mq_schema);
+
+	EXPECT_TRUE(mod_mgr!=NULL);
+	EXPECT_TRUE(stellar_module_manager_get_module(mod_mgr, "test")==NULL);
+	EXPECT_EQ(stellar_module_manager_get_max_thread_num(mod_mgr), 10);
+	EXPECT_EQ(stellar_module_get_mq_schema(mod_mgr), mq_schema);
+
+	EXPECT_EQ(stellar_module_manager_get_thread_id(mod_mgr), -1);// no thread registered
+	EXPECT_TRUE(stellar_module_get_mq_runtime(mod_mgr)==NULL);
+
+	stellar_module_manager_free(mod_mgr);	
+	toml_free(conf);
+
+}
+
+/***********************************
+ * TEST STELLAR MODULE API *
  ***********************************/
 
-//TODO: test case, plugin_specs_load
+TEST(stellar_module, basic_new_and_free) {
+
+	struct stellar_module *mod = stellar_module_new("test");
+	EXPECT_TRUE(mod!=NULL);
+
+	stellar_module_set_name(mod, "test1");
+	EXPECT_STREQ(stellar_module_get_name(mod), "test1");
+
+	stellar_module_set_ctx(mod, (void*)1);
+	EXPECT_EQ((long)stellar_module_get_ctx(mod), 1);	
+
+	stellar_module_free(mod);
+}
+
+/***********************************
+ * TEST MODULE MANAGER API *
+ ***********************************/
 
 TEST(stellar_module_manager, new_with_null_toml) {
 
-	struct stellar_module_manager *mod_mgr = stellar_module_manager_new("", 1, NULL);
+	struct mq_schema *mq_schema=NULL;
+	struct stellar_module_manager *mod_mgr = stellar_module_manager_new(NULL, 10, mq_schema);
+	EXPECT_TRUE(mod_mgr!=NULL);
+	EXPECT_TRUE(stellar_module_manager_get_module(mod_mgr, "test")==NULL);
+	EXPECT_EQ(stellar_module_manager_get_max_thread_num(mod_mgr), 10);
+	EXPECT_EQ(stellar_module_get_mq_schema(mod_mgr), mq_schema);
+
+	EXPECT_TRUE(stellar_module_get_mq_runtime(mod_mgr)==NULL);
+	EXPECT_EQ(stellar_module_manager_get_thread_id(mod_mgr), -1);// no thread registered
+
 	stellar_module_manager_free(mod_mgr);
 }
 
 TEST(stellar_module_manager, new_with_empty_toml) {
 
-	struct stellar_module_manager *mod_mgr = stellar_module_manager_new("/dev/null", 1, NULL);
+	struct mq_schema *mq_schema=NULL;
+	struct stellar_module_manager *mod_mgr = stellar_module_manager_new("/dev/null", 10, mq_schema);
+	EXPECT_TRUE(mod_mgr!=NULL);
+	EXPECT_TRUE(stellar_module_manager_get_module(mod_mgr, "test")==NULL);
+	EXPECT_EQ(stellar_module_manager_get_max_thread_num(mod_mgr), 10);
+	EXPECT_EQ(stellar_module_get_mq_schema(mod_mgr), mq_schema);
+
+	EXPECT_EQ(stellar_module_manager_get_thread_id(mod_mgr), -1);// no thread registered
+	EXPECT_TRUE(stellar_module_get_mq_runtime(mod_mgr)==NULL);
+
 	stellar_module_manager_free(mod_mgr);
 }
 
+TEST(stellar_module_manager, register_thread) {
+
+	struct mq_schema *mq_schema=(struct mq_schema*)1;
+	struct stellar_module_manager *mod_mgr=stellar_module_manager_new(NULL, 10, mq_schema);
+
+	EXPECT_TRUE(mod_mgr!=NULL);
+
+	EXPECT_EQ((long)stellar_module_get_mq_schema(mod_mgr), 1);
+
+	EXPECT_EQ(stellar_module_manager_get_thread_id(mod_mgr), -1);// no thread registered
+	EXPECT_TRUE(stellar_module_get_mq_runtime(mod_mgr)==NULL);
+
+	struct mq_runtime *mq_rt = (struct mq_runtime*)2;
+	stellar_module_manager_register_thread(mod_mgr, 1, mq_rt);
+	
+	EXPECT_EQ(stellar_module_manager_get_thread_id(mod_mgr), 1);
+	EXPECT_EQ((long)stellar_module_get_mq_runtime(mod_mgr), 2);
+
+	stellar_module_manager_free(mod_mgr);	
+
+}
+
+/***********************************
+ * TEST MODULE MANAGER API *
+ ***********************************/
+
+extern "C" struct stellar_module *gtest_module_init(struct stellar_module_manager *mod_mgr)
+{
+	struct stellar_module *mod = stellar_module_new("gtest");
+	EXPECT_STREQ(stellar_module_get_name(mod), "gtest");
+	stellar_module_set_ctx(mod, (void*)1);
+
+	return mod;
+}
+
+extern "C" void gtest_module_exit(struct stellar_module_manager *mod_mgr, struct stellar_module *mod)
+{
+	EXPECT_STREQ(stellar_module_get_name(mod), "gtest");
+	EXPECT_EQ((long)stellar_module_get_ctx(mod), 1);
+
+	EXPECT_EQ(stellar_module_manager_get_module(mod_mgr, "gtest"), mod);
+
+	EXPECT_EQ(stellar_module_manager_get_thread_id(mod_mgr), 1);
+	EXPECT_EQ((long)stellar_module_get_mq_runtime(mod_mgr), 2);
+
+	stellar_module_free(mod);
+}
+
+const char *gtest_module_spec_toml = 
+    "[[module]]\n"
+    "path = \"\"\n"
+    "init = \"gtest_module_init\"\n"
+    "exit = \"gtest_module_exit\"\n";
+
+TEST(module_manager, basic_module) {
+
+	struct mq_schema *mq_schema=(struct mq_schema *)1;
+	toml_table_t *conf = toml_parse((char*)gtest_module_spec_toml, NULL, 0);
+	EXPECT_TRUE(conf!=NULL);
+
+	struct stellar_module_manager *mod_mgr=stellar_module_manager_new_with_toml(conf, 10, mq_schema);
+	EXPECT_TRUE(mod_mgr!=NULL);
+
+	EXPECT_TRUE(stellar_module_manager_get_module(mod_mgr, "gtest")!=NULL);
+
+	EXPECT_EQ(stellar_module_manager_get_max_thread_num(mod_mgr), 10);
+	EXPECT_EQ((long)stellar_module_get_mq_schema(mod_mgr), 1);
+
+	struct mq_runtime *mq_rt = (struct mq_runtime*)2;
+	stellar_module_manager_register_thread(mod_mgr, 1, mq_rt);
+	
+	EXPECT_EQ((long)stellar_module_manager_get_thread_id(mod_mgr), 1);
+	EXPECT_EQ((long)stellar_module_get_mq_runtime(mod_mgr), 2);
+
+	stellar_module_manager_free(mod_mgr);	
+	toml_free(conf);
+
+}
 
 /**********************************************
  * GTEST MAIN *
diff --git a/infra/version.map b/infra/version.map
index 5e87ff7..ea3336d 100644
--- a/infra/version.map
+++ b/infra/version.map
@@ -21,19 +21,9 @@ global:
 	tcp_segment_get_data;
 	tcp_segment_get_len;
 
-	session_exdata_free;
-	stellar_exdata_new_index;
-	session_exdata_set;
-	session_exdata_get;
-
-	stellar_mq_create_topic;
-	stellar_mq_get_topic_id;
-	stellar_mq_update_topic;
-	stellar_mq_destroy_topic;
-	stellar_session_mq_subscribe;
-	session_mq_publish_message;
-	session_mq_ignore_message;
-	session_mq_unignore_message;
+	exdata_*;
+	mq_*;
+	stellar_module_*;
 
 	session_is_symmetric;
 	session_has_duplicate_traffic;