diff --git a/mocha/oms/MemoryOms.py b/mocha/oms/MemoryOms.py
new file mode 100644
index 0000000..71ffe99
--- /dev/null
+++ b/mocha/oms/MemoryOms.py
@@ -0,0 +1,35 @@
+from ..core import *
+from ..oms import Oms
+
+class MemoryOms(Oms):
+
+	def __init__(self):
+		self.__current_tenant = None
+		self.__instances = dict()
+		self.__tenants = dict()
+	
+	def get_instance_by_key(self, key : InstanceKey):
+		return self.__instances[key.to_tuple()]
+	
+	# def get_instance_by_global_identifier(self, global_identifier : Guid):
+
+	def create_tenant(self, tenant_name : str):
+		if tenant_name in self.__tenants:
+			raise NameError("tenant with specified name already exists")
+
+		self.__tenants[tenant_name] = TenantReference(tenant_name, None)
+
+	def select_tenant(self, tenant : TenantReference):
+		self.__current_tenant = tenant
+
+	def release_tenant(self):
+		self.__current_tenant = None
+
+	def get_current_tenant(self):
+		return self.__current_tenant
+
+	def get_tenant_by_name(self, tenant_name : str):
+		if tenant_name in self.__tenants:
+			return self.__tenants[tenant_name]
+
+		return None
\ No newline at end of file
diff --git a/mocha/oms/__init__.py b/mocha/oms/__init__.py
index a27689b..e021feb 100644
--- a/mocha/oms/__init__.py
+++ b/mocha/oms/__init__.py
@@ -1,3 +1,4 @@
 from .Oms import Oms
 from .DatabaseOms import DatabaseOms
+from .MemoryOms import MemoryOms
 from .MySQLDatabaseOms import MySQLDatabaseOms
\ No newline at end of file