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Posted to commits@stratos.apache.org by im...@apache.org on 2014/10/27 15:16:12 UTC

[08/50] [abbrv] Renamed cartridge-agent module to cartridgeagent to follow python package naming Added pytest test directory

http://git-wip-us.apache.org/repos/asf/stratos/blob/bcddfbad/tools/python-cartridge-agent/cartridgeagent/modules/event/instance/status/events.py
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diff --git a/tools/python-cartridge-agent/cartridgeagent/modules/event/instance/status/events.py b/tools/python-cartridge-agent/cartridgeagent/modules/event/instance/status/events.py
new file mode 100644
index 0000000..c000c55
--- /dev/null
+++ b/tools/python-cartridge-agent/cartridgeagent/modules/event/instance/status/events.py
@@ -0,0 +1,98 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+import json
+
+
+class InstanceActivatedEvent:
+    def __init__(self, service_name, cluster_id, network_partition_id, parition_id, member_id):
+        self.serviceName = service_name
+        """ :type : str  """
+        self.clusterId = cluster_id
+        """ :type : str  """
+        self.networkPartitionId = network_partition_id
+        """ :type : str  """
+        self.partitionId = parition_id
+        """ :type : str  """
+        self.memberId = member_id
+        """ :type : str  """
+
+    def to_json(self):
+        return to_json(self)
+
+
+class InstanceStartedEvent:
+    def __init__(self, service_name, cluster_id, network_partition_id, parition_id, member_id):
+        self.serviceName = service_name
+        """ :type : str  """
+        self.clusterId = cluster_id
+        """ :type : str  """
+        self.networkPartitionId = network_partition_id
+        """ :type : str  """
+        self.partitionId = parition_id
+        """ :type : str  """
+        self.memberId = member_id
+        """ :type : str  """
+
+    def to_json(self):
+        return to_json(self)
+
+
+class InstanceMaintenanceModeEvent:
+
+    def __init__(self, service_name, cluster_id, network_partition_id, partition_id, member_id):
+        self.serviceName = service_name
+        """ :type : str  """
+        self.clusterId = cluster_id
+        """ :type : str  """
+        self.networkPartitionId = network_partition_id
+        """ :type : str  """
+        self.partitionId = partition_id
+        """ :type : str  """
+        self.memberId = member_id
+        """ :type : str  """
+
+    def to_json(self):
+        return to_json(self)
+
+
+class InstanceReadyToShutdownEvent:
+
+    def __init__(self, service_name, cluster_id, network_partition_id, partition_id, member_id):
+        self.serviceName = service_name
+        """ :type : str  """
+        self.clusterId = cluster_id
+        """ :type : str  """
+        self.networkPartitionId = network_partition_id
+        """ :type : str  """
+        self.partitionId = partition_id
+        """ :type : str  """
+        self.memberId = member_id
+        """ :type : str  """
+
+    def to_json(self):
+        return to_json(self)
+
+
+def to_json(instance):
+    """
+    common function to serialize status event object
+    :param obj instance:
+    :return: serialized json string
+    :rtype str
+    """
+    return json.dumps(instance, default=lambda o: o.__dict__, sort_keys=True, indent=4)
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/stratos/blob/bcddfbad/tools/python-cartridge-agent/cartridgeagent/modules/event/tenant/__init__.py
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diff --git a/tools/python-cartridge-agent/cartridgeagent/modules/event/tenant/__init__.py b/tools/python-cartridge-agent/cartridgeagent/modules/event/tenant/__init__.py
new file mode 100644
index 0000000..13a8339
--- /dev/null
+++ b/tools/python-cartridge-agent/cartridgeagent/modules/event/tenant/__init__.py
@@ -0,0 +1,16 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.

http://git-wip-us.apache.org/repos/asf/stratos/blob/bcddfbad/tools/python-cartridge-agent/cartridgeagent/modules/event/tenant/events.py
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diff --git a/tools/python-cartridge-agent/cartridgeagent/modules/event/tenant/events.py b/tools/python-cartridge-agent/cartridgeagent/modules/event/tenant/events.py
new file mode 100644
index 0000000..def2b64
--- /dev/null
+++ b/tools/python-cartridge-agent/cartridgeagent/modules/event/tenant/events.py
@@ -0,0 +1,147 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+import json
+from ... tenant.tenantcontext import *
+
+
+class SubscriptionDomainAddedEvent():
+
+    def __init__(self):
+        self.tenant_id = None
+        """ :type : int  """
+        self.service_name = None
+        """ :type : str  """
+        self.cluster_ids = None
+        """ :type : list[str]  """
+        self.domain_name = None
+        """ :type : str  """
+        self.application_context = None
+        """ :type : str  """
+
+    @staticmethod
+    def create_from_json(json_str):
+        json_obj = json.loads(json_str)
+        instance = SubscriptionDomainAddedEvent()
+
+        instance.cluster_ids = json_obj["clusterIds"] if "clusterIds" in json_obj else None
+        instance.tenant_id = json_obj["tenantId"] if "tenantId" in json_obj else None
+        instance.service_name = json_obj["serviceName"] if "serviceName" in json_obj else None
+        instance.domain_name = json_obj["domainName"] if "domainName" in json_obj else None
+        instance.application_context = json_obj["applicationContext"] if "applicationContext" in json_obj else None
+
+        return instance
+
+
+class SubscriptionDomainRemovedEvent:
+
+    def __init__(self, tenant_id, service_name, cluster_ids, domain_name):
+        self.tenant_id = tenant_id
+        """ :type : int  """
+        self.service_name = service_name
+        """ :type : str  """
+        self.cluster_ids = cluster_ids
+        """ :type : list[str]  """
+        self.domain_name = domain_name
+        """ :type : str  """
+
+    @staticmethod
+    def create_from_json(json_str):
+        json_obj = json.loads(json_str)
+        instance = SubscriptionDomainRemovedEvent()
+
+        instance.cluster_ids = json_obj["clusterIds"] if "clusterIds" in json_obj else None
+        instance.tenant_id = json_obj["tenantId"] if "tenantId" in json_obj else None
+        instance.service_name = json_obj["serviceName"] if "serviceName" in json_obj else None
+        instance.domain_name = json_obj["domainName"] if "domainName" in json_obj else None
+
+        return instance
+
+
+class CompleteTenantEvent:
+
+    def __init__(self):
+        self.tenants = []
+        """ :type : list[Tenant]  """
+        self.tenant_list_json = None
+        """ :type : str  """
+
+    @staticmethod
+    def create_from_json(json_str):
+        json_obj = json.loads(json_str)
+        instance = CompleteTenantEvent()
+        instance.tenants = []
+
+        tenants_str = json_obj["tenants"] if "tenants" in json_obj else None
+        instance.tenant_list_json = tenants_str
+        if tenants_str is not None:
+            for tenant_str in tenants_str:
+                tenant_obj = Tenant(int(tenant_str["tenantId"]), tenant_str["tenantDomain"])
+                for service_name in tenant_str["serviceNameSubscriptionMap"]:
+                    sub_str = tenant_str["serviceNameSubscriptionMap"][service_name]
+                    sub = Subscription(sub_str["serviceName"], sub_str["clusterIds"])
+                    for domain_name in sub_str["subscriptionDomainMap"]:
+                        subdomain_str = sub_str["subscriptionDomainMap"][domain_name]
+                        sub.add_subscription_domain(domain_name, subdomain_str["applicationContext"])
+                    tenant_obj.add_subscription(sub)
+                instance.tenants.append(tenant_obj)
+
+        return instance
+
+
+class TenantSubscribedEvent:
+
+    def __init__(self):
+        self.tenant_id = None
+        """ :type : int  """
+        self.service_name = None
+        """ :type : str  """
+        self.cluster_ids = None
+        """ :type : list[str]  """
+
+    @staticmethod
+    def create_from_json(json_str):
+        json_obj = json.loads(json_str)
+        instance = TenantSubscribedEvent()
+
+        instance.tenant_id = json_obj["tenantId"] if "tenantId" in json_obj else None
+        instance.service_name = json_obj["serviceName"] if "serviceName" in json_obj else None
+        instance.cluster_ids = json_obj["clusterIds"] if "clusterIds" in json_obj else None
+
+        return instance
+
+
+class TenantUnsubscribedEvent:
+
+    def __init__(self):
+        self.tenant_id = None
+        """ :type : int  """
+        self.service_name = None
+        """ :type : str  """
+        self.cluster_ids = None
+        """ :type : list[str]  """
+
+    @staticmethod
+    def create_from_json(json_str):
+        json_obj = json.loads(json_str)
+        instance = TenantUnsubscribedEvent()
+
+        instance.tenant_id = json_obj["tenantId"] if "tenantId" in json_obj else None
+        instance.service_name = json_obj["serviceName"] if "serviceName" in json_obj else None
+        instance.cluster_ids = json_obj["clusterIds"] if "clusterIds" in json_obj else None
+
+        return instance
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/stratos/blob/bcddfbad/tools/python-cartridge-agent/cartridgeagent/modules/event/topology/__init__.py
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diff --git a/tools/python-cartridge-agent/cartridgeagent/modules/event/topology/__init__.py b/tools/python-cartridge-agent/cartridgeagent/modules/event/topology/__init__.py
new file mode 100644
index 0000000..2456923
--- /dev/null
+++ b/tools/python-cartridge-agent/cartridgeagent/modules/event/topology/__init__.py
@@ -0,0 +1,17 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+

http://git-wip-us.apache.org/repos/asf/stratos/blob/bcddfbad/tools/python-cartridge-agent/cartridgeagent/modules/event/topology/events.py
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diff --git a/tools/python-cartridge-agent/cartridgeagent/modules/event/topology/events.py b/tools/python-cartridge-agent/cartridgeagent/modules/event/topology/events.py
new file mode 100644
index 0000000..52c7c19
--- /dev/null
+++ b/tools/python-cartridge-agent/cartridgeagent/modules/event/topology/events.py
@@ -0,0 +1,280 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+import json
+
+from ... topology.topologycontext import *
+
+
+class MemberActivatedEvent:
+
+    def __init__(self):
+        self.service_name = None
+        """ :type : str  """
+        self.cluster_id = None
+        """ :type : str  """
+        self.network_partition_id = None
+        """ :type : str  """
+        self.partition_id = None
+        """ :type : str  """
+        self.member_id = None
+        """ :type : str  """
+        self.port_map = {}
+        """ :type : dict[str, Port]  """
+        self.member_ip = None
+        """ :type : str  """
+
+    def get_port(self, proxy_port):
+        """
+        Returns the port object of the provided port id
+        :param str proxy_port:
+        :return: Port object, None if the port id is invalid
+        :rtype: topology.topologycontext.Port
+        """
+        if proxy_port in self.port_map:
+            return self.port_map[proxy_port]
+
+        return None
+
+    @staticmethod
+    def create_from_json(json_str):
+        json_obj = json.loads(json_str)
+        instance = MemberActivatedEvent()
+
+        instance.service_name = json_obj["serviceName"] if "serviceName" in json_obj else None
+        instance.cluster_id = json_obj["clusterId"] if "clusterId" in json_obj else None
+        instance.network_partition_id = json_obj["networkPartitionId"] if "networkPartitionId" in json_obj else None
+        instance.partition_id = json_obj["partitionId"] if "partitionId" in json_obj else None
+        instance.member_id = json_obj["memberId"] if "memberId" in json_obj else None
+        #instance.port_map = json_obj["portMap"] if "portMap" in json_obj else {}
+        instance.member_ip = json_obj["memberIp"] if "memberIp" in json_obj else None
+
+        for port_proxy in json_obj["portMap"]:
+            port_str = json_obj["portMap"][port_proxy]
+            port_obj = Port(port_str["protocol"], port_str["value"], port_proxy)
+            instance.port_map[port_proxy] = port_obj
+
+        return instance
+
+
+class MemberTerminatedEvent:
+
+    def __init__(self):
+        self.service_name = None
+        """ :type : str  """
+        self.cluster_id = None
+        """ :type : str  """
+        self.network_partition_id = None
+        """ :type : str  """
+        self.partition_id = None
+        """ :type : str  """
+        self.member_id = None
+        """ :type : str  """
+        self.properties = {}
+        """ :type : dict[str, str]  """
+
+    @staticmethod
+    def create_from_json(json_str):
+        json_obj = json.loads(json_str)
+        instance = MemberTerminatedEvent()
+
+        instance.service_name = json_obj["serviceName"] if "serviceName" in json_obj else None
+        instance.cluster_id = json_obj["clusterId"] if "clusterId" in json_obj else None
+        instance.network_partition_id = json_obj["networkPartitionId"] if "networkPartitionId" in json_obj else None
+        instance.partition_id = json_obj["partitionId"] if "partitionId" in json_obj else None
+        instance.member_id = json_obj["memberId"] if "memberId" in json_obj else None
+        instance.properties = json_obj["properties"] if "properties" in json_obj else None
+
+        return instance
+
+
+class MemberSuspendedEvent:
+
+    def __init__(self):
+        self.service_name = None
+        """ :type : str  """
+        self.cluster_id = None
+        """ :type : str  """
+        self.network_partition_id = None
+        """ :type : str  """
+        self.partition_id = None
+        """ :type : str  """
+        self.member_id = None
+        """ :type : str  """
+
+    @staticmethod
+    def create_from_json(json_str):
+        json_obj = json.loads(json_str)
+        instance = MemberSuspendedEvent()
+
+        instance.service_name = json_obj["serviceName"] if "serviceName" in json_obj else None
+        instance.cluster_id = json_obj["clusterId"] if "clusterId" in json_obj else None
+        instance.network_partition_id = json_obj["networkPartitionId"] if "networkPartitionId" in json_obj else None
+        instance.partition_id = json_obj["partitionId"] if "partitionId" in json_obj else None
+        instance.member_id = json_obj["memberId"] if "memberId" in json_obj else None
+
+        return instance
+
+
+class CompleteTopologyEvent:
+
+    def __init__(self):
+        self.topology = None
+        """ :type :  Topology """
+
+    @staticmethod
+    def create_from_json(json_str):
+        json_obj = json.loads(json_str)
+        instance = CompleteTopologyEvent()
+
+        topology_str = json_obj["topology"] if "topology" in json_obj else None
+        if topology_str is not None:
+            topology_obj = Topology()
+            topology_obj.json_str = topology_str
+
+            #add service map
+            for service_name in topology_str["serviceMap"]:
+                service_str = topology_str["serviceMap"][service_name]
+
+                service_obj = Service(service_name, service_str["serviceType"])
+                service_obj.properties = service_str["properties"]
+                # add ports to port map
+                for port_proxy in service_str["portMap"]:
+                    port_str = service_str["portMap"][port_proxy]
+                    port_obj = Port(port_str["protocol"], port_str["value"], port_proxy)
+                    service_obj.add_port(port_obj)
+
+                #add cluster map
+                for cluster_id in service_str["clusterIdClusterMap"]:
+                    cluster_str = service_str["clusterIdClusterMap"][cluster_id]
+                    cl_service_name = cluster_str["serviceName"]
+                    cl_autoscale_policy_name = cluster_str["autoscalePolicyName"]
+                    cl_deployment_policy_name = cluster_str["deploymentPolicyName"] if "deploymentPolicyName" in cluster_str else None
+
+                    cluster_obj = Cluster(cl_service_name, cluster_id, cl_deployment_policy_name, cl_autoscale_policy_name)
+                    cluster_obj.hostnames = cluster_str["hostNames"]
+                    cluster_obj.tenant_range = cluster_str["tenantRange"] if "tenantRange" in cluster_str else None
+                    cluster_obj.is_lb_cluster = cluster_str["isLbCluster"]
+                    cluster_obj.is_kubernetes_cluster = cluster_str["isKubernetesCluster"]
+                    cluster_obj.status = cluster_str["status"]
+                    cluster_obj.load_balancer_algorithm_name = cluster_str["loadBalanceAlgorithmName"] if "loadBalanceAlgorithmName" in cluster_str else None
+                    cluster_obj.properties = cluster_str["properties"]
+                    cluster_obj.member_list_json = cluster_str["memberMap"]
+
+                    #add member map
+                    for member_id in cluster_str["memberMap"]:
+                        member_str = cluster_str["memberMap"][member_id]
+                        mm_service_name = member_str["serviceName"]
+                        mm_cluster_id = member_str["clusterId"]
+                        mm_network_partition_id = member_str["networkPartitionId"] if "networkPartitionId" in member_str else None
+                        mm_partition_id = member_str["partitionId"] if "partitionId" in member_str else None
+
+                        member_obj = Member(mm_service_name, mm_cluster_id, mm_network_partition_id, mm_partition_id, member_id)
+                        member_obj.member_public_ip = member_str["memberPublicIp"]
+                        member_obj.status = member_str["status"]
+                        member_obj.member_ip = member_str["memberIp"]
+                        member_obj.properties = member_str["properties"]
+                        member_obj.lb_cluster_id = member_str["lbClusterId"] if "lbClusterId" in member_str else None
+                        member_obj.json_str = member_str
+
+                        #add port map
+                        for mm_port_proxy in member_str["portMap"]:
+                            mm_port_str = member_str["portMap"][mm_port_proxy]
+                            mm_port_obj = Port(mm_port_str["protocol"], mm_port_str["value"], mm_port_proxy)
+                            member_obj.add_port(mm_port_obj)
+                        cluster_obj.add_member(member_obj)
+                    service_obj.add_cluster(cluster_obj)
+                topology_obj.add_service(service_obj)
+            instance.topology = topology_obj
+
+        return instance
+
+    def get_topology(self):
+        return self.topology
+
+
+class MemberStartedEvent:
+
+    def __init__(self):
+        self.service_name = None
+        """ :type : str  """
+        self.cluster_id = None
+        """ :type : str  """
+        self.network_partition_id = None
+        """ :type : str  """
+        self.partition_id = None
+        """ :type : str  """
+        self.member_id = None
+        """ :type : str  """
+        self.status = None
+        """ :type : str  """
+        self.properties = {}
+        """ :type : dict[str, str]  """
+
+    @staticmethod
+    def create_from_json(json_str):
+        json_obj = json.loads(json_str)
+        instance = MemberStartedEvent()
+
+        instance.service_name = json_obj["serviceName"] if "serviceName" in json_obj else None
+        instance.cluster_id = json_obj["clusterId"] if "clusterId" in json_obj else None
+        instance.network_partition_id = json_obj["networkPartitionId"] if "networkPartitionId" in json_obj else None
+        instance.partition_id = json_obj["partitionId"] if "partitionId" in json_obj else None
+        instance.member_id = json_obj["memberId"] if "memberId" in json_obj else None
+        instance.properties = json_obj["properties"] if "properties" in json_obj else None
+
+        return instance
+
+
+class InstanceSpawnedEvent:
+
+    def __init__(self):
+        self.service_name = None
+        """ :type : str  """
+        self.cluster_id = None
+        """ :type : str  """
+        self.network_partition_id = None
+        """ :type : str  """
+        self.partition_id = None
+        """ :type : str  """
+        self.member_id = None
+        """ :type : str  """
+        self.lb_cluster_id = None
+        """ :type : str  """
+        self.member_public_ip = None
+        """ :type : str  """
+        self.member_ip = None
+        """ :type : str  """
+        self.properties = {}
+        """ :type : dict[str, str]  """
+
+    @staticmethod
+    def create_from_json(json_str):
+        json_obj = json.loads(json_str)
+        instance = InstanceSpawnedEvent()
+
+        instance.service_name = json_obj["serviceName"] if "serviceName" in json_obj else None
+        instance.cluster_id = json_obj["clusterId"] if "clusterId" in json_obj else None
+        instance.network_partition_id = json_obj["networkPartitionId"] if "networkPartitionId" in json_obj else None
+        instance.partition_id = json_obj["partitionId"] if "partitionId" in json_obj else None
+        instance.member_id = json_obj["memberId"] if "memberId" in json_obj else None
+        instance.lb_cluster_id = json_obj["lbClusterId"] if "lbClusterId" in json_obj else None
+        instance.member_public_ip = json_obj["memberPublicIp"] if "memberPublicIp" in json_obj else None
+        instance.member_ip = json_obj["memberIp"] if "memberIp" in json_obj else None
+        instance.properties = json_obj["properties"]
+
+        return instance
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/stratos/blob/bcddfbad/tools/python-cartridge-agent/cartridgeagent/modules/exception/__init__.py
----------------------------------------------------------------------
diff --git a/tools/python-cartridge-agent/cartridgeagent/modules/exception/__init__.py b/tools/python-cartridge-agent/cartridgeagent/modules/exception/__init__.py
new file mode 100644
index 0000000..13a8339
--- /dev/null
+++ b/tools/python-cartridge-agent/cartridgeagent/modules/exception/__init__.py
@@ -0,0 +1,16 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.

http://git-wip-us.apache.org/repos/asf/stratos/blob/bcddfbad/tools/python-cartridge-agent/cartridgeagent/modules/exception/parameternotfoundexception.py
----------------------------------------------------------------------
diff --git a/tools/python-cartridge-agent/cartridgeagent/modules/exception/parameternotfoundexception.py b/tools/python-cartridge-agent/cartridgeagent/modules/exception/parameternotfoundexception.py
new file mode 100644
index 0000000..88deafd
--- /dev/null
+++ b/tools/python-cartridge-agent/cartridgeagent/modules/exception/parameternotfoundexception.py
@@ -0,0 +1,35 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+class ParameterNotFoundException(Exception):
+    """
+    Exception raised when a property is not present in the configuration or the payload
+    of the cartridge agent
+    """
+    __message = None
+
+    def __init__(self, message):
+        Exception.__init__(self, message)
+        self.__message = message
+
+    def get_message(self):
+        """
+        The message provided when the exception is raised
+        :return: message
+        :rtype: str
+        """
+        return self.__message

http://git-wip-us.apache.org/repos/asf/stratos/blob/bcddfbad/tools/python-cartridge-agent/cartridgeagent/modules/extensions/__init__.py
----------------------------------------------------------------------
diff --git a/tools/python-cartridge-agent/cartridgeagent/modules/extensions/__init__.py b/tools/python-cartridge-agent/cartridgeagent/modules/extensions/__init__.py
new file mode 100644
index 0000000..13a8339
--- /dev/null
+++ b/tools/python-cartridge-agent/cartridgeagent/modules/extensions/__init__.py
@@ -0,0 +1,16 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.

http://git-wip-us.apache.org/repos/asf/stratos/blob/bcddfbad/tools/python-cartridge-agent/cartridgeagent/modules/extensions/abstractextensionhandler.py
----------------------------------------------------------------------
diff --git a/tools/python-cartridge-agent/cartridgeagent/modules/extensions/abstractextensionhandler.py b/tools/python-cartridge-agent/cartridgeagent/modules/extensions/abstractextensionhandler.py
new file mode 100644
index 0000000..1f2df10
--- /dev/null
+++ b/tools/python-cartridge-agent/cartridgeagent/modules/extensions/abstractextensionhandler.py
@@ -0,0 +1,78 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+class AbstractExtensionHandler:
+
+    def on_instance_started_event(self):
+        raise NotImplementedError
+
+    def on_instance_activated_event(self):
+        raise NotImplementedError
+
+    def on_artifact_updated_event(self, artifacts_updated_event):
+        raise NotImplementedError
+
+    def on_artifact_update_scheduler_event(self, tenant_id):
+        raise NotImplementedError
+
+    def on_instance_cleanup_cluster_event(self, instance_cleanup_cluster_event):
+        raise NotImplementedError
+
+    def on_instance_cleanup_member_event(self, instance_cleanup_member_event):
+        raise NotImplementedError
+
+    def on_member_activated_event(self, member_activated_event):
+        raise NotImplementedError
+
+    def on_complete_topology_event(self, complete_topology_event):
+        raise NotImplementedError
+
+    def on_instance_spawned_event(self, instance_spawned_event):
+        raise NotImplementedError
+
+    def on_complete_tenant_event(self, complete_tenant_event):
+        raise NotImplementedError
+
+    def on_member_terminated_event(self, member_terminated_event):
+        raise NotImplementedError
+
+    def on_member_suspended_event(self, member_suspended_event):
+        raise NotImplementedError
+
+    def on_member_started_event(self, member_started_event):
+        raise NotImplementedError
+
+    def start_server_extension(self):
+        raise NotImplementedError
+
+    def volume_mount_extension(self, persistence_mappings_payload):
+        raise NotImplementedError
+
+    def on_subscription_domain_added_event(self, subscription_domain_added_event):
+        raise NotImplementedError
+
+    def on_subscription_domain_removed_event(self, subscription_domain_removed_event):
+        raise NotImplementedError
+
+    def on_copy_artifacts_extension(self, src, des):
+        raise NotImplementedError
+
+    def on_tenant_subscribed_event(self, tenant_subscribed_event):
+            raise NotImplementedError
+
+    def on_tenant_unsubscribed_event(self, tenant_unsubscribed_event):
+            raise NotImplementedError

http://git-wip-us.apache.org/repos/asf/stratos/blob/bcddfbad/tools/python-cartridge-agent/cartridgeagent/modules/extensions/defaultextensionhandler.py
----------------------------------------------------------------------
diff --git a/tools/python-cartridge-agent/cartridgeagent/modules/extensions/defaultextensionhandler.py b/tools/python-cartridge-agent/cartridgeagent/modules/extensions/defaultextensionhandler.py
new file mode 100644
index 0000000..8a7ccc0
--- /dev/null
+++ b/tools/python-cartridge-agent/cartridgeagent/modules/extensions/defaultextensionhandler.py
@@ -0,0 +1,789 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+import time
+import json
+
+from abstractextensionhandler import AbstractExtensionHandler
+from ..util import extensionutils, cartridgeagentutils
+
+
+class DefaultExtensionHandler(AbstractExtensionHandler):
+    """
+    Default implementation of the AbstractExtensionHandler
+    """
+    log = None
+
+    def __init__(self):
+        self.log = LogFactory().get_log(__name__)
+        self.wk_members = []
+        self.cartridge_agent_config = CartridgeAgentConfiguration()
+
+    def on_instance_started_event(self):
+        try:
+            self.log.debug("Processing instance started event...")
+            if self.cartridge_agent_config.is_multitenant:
+                artifact_source = "%r/repository/deployment/server/" % self.cartridge_agent_config.app_path
+                artifact_dest = cartridgeagentconstants.SUPERTENANT_TEMP_PATH
+                extensionutils.execute_copy_artifact_extension(artifact_source, artifact_dest)
+
+            env_params = {}
+            extensionutils.execute_instance_started_extension(env_params)
+        except:
+            self.log.exception("Error processing instance started event")
+
+    def on_instance_activated_event(self):
+        extensionutils.execute_instance_activated_extension()
+
+    def on_artifact_updated_event(self, artifacts_updated_event):
+        self.log.info("Artifact update event received: [tenant] %r [cluster] %r [status] %r" %
+                      (artifacts_updated_event.tenant_id, artifacts_updated_event.cluster_id,
+                       artifacts_updated_event.status))
+
+        cluster_id_event = str(artifacts_updated_event.cluster_id).strip()
+        cluster_id_payload = self.cartridge_agent_config.cluster_id
+        repo_url = str(artifacts_updated_event.repo_url).strip()
+
+        if (repo_url != "") and (cluster_id_payload is not None) and (cluster_id_payload == cluster_id_event):
+            local_repo_path = self.cartridge_agent_config.app_path
+
+            secret = self.cartridge_agent_config.cartridge_key
+            repo_password = cartridgeagentutils.decrypt_password(artifacts_updated_event.repo_password, secret)
+
+            repo_username = artifacts_updated_event.repo_username
+            tenant_id = artifacts_updated_event.tenant_id
+            is_multitenant = self.cartridge_agent_config.is_multitenant
+            commit_enabled = artifacts_updated_event.commit_enabled
+
+            self.log.info("Executing git checkout")
+
+            # create repo object
+            repo_info = RepositoryInformation(repo_url, repo_username, repo_password, local_repo_path, tenant_id,
+                                              is_multitenant, commit_enabled)
+
+            # checkout code
+            subscribe_run, repo_context = agentgithandler.AgentGitHandler.checkout(repo_info)
+            # repo_context = checkout_result["repo_context"]
+            # execute artifact updated extension
+            env_params = {"STRATOS_ARTIFACT_UPDATED_CLUSTER_ID": artifacts_updated_event.cluster_id,
+                          "STRATOS_ARTIFACT_UPDATED_TENANT_ID": artifacts_updated_event.tenant_id,
+                          "STRATOS_ARTIFACT_UPDATED_REPO_URL": artifacts_updated_event.repo_url,
+                          "STRATOS_ARTIFACT_UPDATED_REPO_PASSWORD": artifacts_updated_event.repo_password,
+                          "STRATOS_ARTIFACT_UPDATED_REPO_USERNAME": artifacts_updated_event.repo_username,
+                          "STRATOS_ARTIFACT_UPDATED_STATUS": artifacts_updated_event.status}
+
+            extensionutils.execute_artifacts_updated_extension(env_params)
+
+            if subscribe_run:
+                # publish instanceActivated
+                cartridgeagentpublisher.publish_instance_activated_event()
+
+            update_artifacts = self.cartridge_agent_config.read_property(cartridgeagentconstants.ENABLE_ARTIFACT_UPDATE, False)
+            update_artifacts = True if str(update_artifacts).strip().lower() == "true" else False
+            if update_artifacts:
+                auto_commit = self.cartridge_agent_config.is_commits_enabled
+                auto_checkout = self.cartridge_agent_config.is_checkout_enabled
+
+                try:
+                    update_interval = len(
+                        self.cartridge_agent_config.read_property(cartridgeagentconstants.ARTIFACT_UPDATE_INTERVAL, False))
+                except ParameterNotFoundException:
+                    self.log.exception("Invalid artifact sync interval specified ")
+                    update_interval = 10
+                except ValueError:
+                    self.log.exception("Invalid artifact sync interval specified ")
+                    update_interval = 10
+
+                self.log.info("Artifact updating task enabled, update interval: %r seconds" % update_interval)
+
+                self.log.info("Auto Commit is turned %r " % "on" if auto_commit else "off")
+                self.log.info("Auto Checkout is turned %r " % "on" if auto_checkout else "off")
+
+                agentgithandler.AgentGitHandler.schedule_artifact_update_scheduled_task(repo_info, auto_checkout, auto_commit,
+                                                                        update_interval)
+
+    def on_artifact_update_scheduler_event(self, tenant_id):
+        env_params = {"STRATOS_ARTIFACT_UPDATED_TENANT_ID": tenant_id, "STRATOS_ARTIFACT_UPDATED_SCHEDULER": True}
+
+        extensionutils.execute_artifacts_updated_extension(env_params)
+
+    def on_instance_cleanup_cluster_event(self, instance_cleanup_cluster_event):
+        self.cleanup()
+
+    def on_instance_cleanup_member_event(self, instance_cleanup_member_event):
+        self.cleanup()
+
+    def on_member_activated_event(self, member_activated_event):
+        self.log.info("Member activated event received: [service] %r [cluster] %r [member] %r"
+            % (member_activated_event.service_name, member_activated_event.cluster_id, member_activated_event.member_id))
+
+        topology_consistent = extensionutils.check_topology_consistency(
+            member_activated_event.service_name,
+            member_activated_event.cluster_id,
+            member_activated_event.member_id)
+
+        if not topology_consistent:
+            self.log.error("Topology is inconsistent...failed to execute member activated event")
+            return
+
+        topology = TopologyContext.get_topology()
+        service = topology.get_service(member_activated_event.service_name)
+        cluster = service.get_cluster(member_activated_event.cluster_id)
+        member = cluster.get_member(member_activated_event.member_id)
+        lb_cluster_id = member.lb_cluster_id
+
+        if extensionutils.is_relevant_member_event(member_activated_event.service_name,
+                                                   member_activated_event.cluster_id, lb_cluster_id):
+
+            env_params = {"STRATOS_MEMBER_ACTIVATED_MEMBER_IP": str(member_activated_event.member_ip),
+                          "STRATOS_MEMBER_ACTIVATED_MEMBER_ID": str(member_activated_event.member_id),
+                          "STRATOS_MEMBER_ACTIVATED_CLUSTER_ID": str(member_activated_event.cluster_id),
+                          "STRATOS_MEMBER_ACTIVATED_LB_CLUSTER_ID": str(lb_cluster_id),
+                          "STRATOS_MEMBER_ACTIVATED_NETWORK_PARTITION_ID": str(member_activated_event.network_partition_id),
+                          "STRATOS_MEMBER_ACTIVATED_SERVICE_NAME": str(member_activated_event.service_name)}
+
+            ports = member_activated_event.port_map.values()
+            ports_str = ""
+            for port in ports:
+                ports_str += port.protocol + "," + str(port.value) + "," + str(port.proxy) + "|"
+
+            env_params["STRATOS_MEMBER_ACTIVATED_PORTS"] = ports_str
+
+            env_params["STRATOS_MEMBER_ACTIVATED_MEMBER_LIST_JSON"] = json.dumps(cluster.member_list_json)
+
+            member_ips = extensionutils.get_lb_member_ip(lb_cluster_id)
+            if member_ips is not None and len(member_ips) > 1:
+                env_params["STRATOS_MEMBER_ACTIVATED_LB_IP"] = str(member_ips[0])
+                env_params["STRATOS_MEMBER_ACTIVATED_LB_PUBLIC_IP"] = str(member_ips[1])
+
+            env_params["STRATOS_TOPOLOGY_JSON"] = json.dumps(topology.json_str)
+
+            extensionutils.add_properties(service.properties, env_params, "MEMBER_ACTIVATED_SERVICE_PROPERTY")
+            extensionutils.add_properties(cluster.properties, env_params, "MEMBER_ACTIVATED_CLUSTER_PROPERTY")
+            extensionutils.add_properties(member.properties, env_params, "MEMBER_ACTIVATED_MEMBER_PROPERTY")
+
+            clustered = self.cartridge_agent_config.is_clustered
+
+            if member.properties is not None and cartridgeagentconstants.CLUSTERING_PRIMARY_KEY in member.properties \
+                    and member.properties[cartridgeagentconstants.CLUSTERING_PRIMARY_KEY] == "true" \
+                    and clustered is not None and clustered:
+
+                self.log.debug(" If WK member is re-spawned, update axis2.xml ")
+
+                has_wk_ip_changed = True
+                for wk_member in self.wk_members:
+                    if wk_member.member_ip == member_activated_event.member_ip:
+                        has_wk_ip_changed = False
+
+                self.log.debug(" hasWKIpChanged %r" + has_wk_ip_changed)
+
+                min_count = int(self.cartridge_agent_config.min_count)
+                is_wk_member_grp_ready = self.is_wk_member_group_ready(env_params, min_count)
+                self.log.debug("MinCount: %r" % min_count)
+                self.log.debug("is_wk_member_grp_ready : %r" % is_wk_member_grp_ready)
+
+                if has_wk_ip_changed and is_wk_member_grp_ready:
+                    self.log.debug("Setting env var STRATOS_UPDATE_WK_IP to true")
+                    env_params["STRATOS_UPDATE_WK_IP"] = "true"
+
+            self.log.debug("Setting env var STRATOS_CLUSTERING to %r" % clustered)
+            env_params["STRATOS_CLUSTERING"] = str(clustered)
+            env_params["STRATOS_WK_MEMBER_COUNT"] = str(self.cartridge_agent_config.min_count)
+
+            extensionutils.execute_member_activated_extension(env_params)
+        else:
+            self.log.debug("Member activated event is not relevant...skipping agent extension")
+
+    def on_complete_topology_event(self, complete_topology_event):
+        self.log.debug("Complete topology event received")
+
+        service_name_in_payload = self.cartridge_agent_config.service_name
+        cluster_id_in_payload = self.cartridge_agent_config.cluster_id
+        member_id_in_payload = self.cartridge_agent_config.member_id
+
+        consistant = extensionutils.check_topology_consistency(
+            service_name_in_payload,
+            cluster_id_in_payload,
+            member_id_in_payload)
+
+        if not consistant:
+            return
+        else:
+            self.cartridge_agent_config.initialized = True
+
+        topology = complete_topology_event.get_topology()
+        service = topology.get_service(service_name_in_payload)
+        cluster = service.get_cluster(cluster_id_in_payload)
+
+        env_params = {"STRATOS_TOPOLOGY_JSON": json.dumps(topology.json_str), "STRATOS_MEMBER_LIST_JSON": json.dumps(cluster.member_list_json)}
+
+        extensionutils.execute_complete_topology_extension(env_params)
+
+    def on_instance_spawned_event(self, instance_spawned_event):
+        self.log.debug("Instance Spawned event received")
+
+        service_name_in_payload = self.cartridge_agent_config.service_name
+        cluster_id_in_payload = self.cartridge_agent_config.cluster_id
+        member_id_in_payload = self.cartridge_agent_config.member_id
+
+        consistant = extensionutils.check_topology_consistency(
+            service_name_in_payload,
+            cluster_id_in_payload,
+            member_id_in_payload)
+
+        if not consistant:
+            return
+        else:
+            self.cartridge_agent_config.initialized = True
+
+    def on_complete_tenant_event(self, complete_tenant_event):
+        self.log.debug("Complete tenant event received")
+
+        tenant_list_json = complete_tenant_event.tenant_list_json
+        self.log.debug("Complete tenants:" + json.dumps(tenant_list_json))
+
+        env_params = {"STRATOS_TENANT_LIST_JSON": json.dumps(tenant_list_json)}
+
+        extensionutils.execute_complete_tenant_extension(env_params)
+
+    def on_member_terminated_event(self, member_terminated_event):
+        self.log.info("Member terminated event received: [service] " + member_terminated_event.service_name +
+                      " [cluster] " + member_terminated_event.cluster_id
+                      + " [member] " + member_terminated_event.member_id)
+
+        topology_consistent = extensionutils.check_topology_consistency(
+            member_terminated_event.service_name,
+            member_terminated_event.cluster_id,
+            member_terminated_event.member_id
+        )
+
+        if not topology_consistent:
+            self.log.error("Topology is inconsistent...failed to execute member terminated event")
+            return
+
+        topology = TopologyContext.get_topology()
+        service = topology.get_service(member_terminated_event.service_name)
+        cluster = service.get_cluster(member_terminated_event.cluster_id)
+        terminated_member = cluster.get_member(member_terminated_event.member_id)
+        lb_cluster_id = cluster.get_member(member_terminated_event.member_id).lb_cluster_id
+
+        #check whether terminated member is within the same cluster, LB cluster or service group
+        if extensionutils.is_relevant_member_event(
+                member_terminated_event.service_name,
+                member_terminated_event.cluster_id,
+                lb_cluster_id):
+
+            env_params = {"STRATOS_MEMBER_TERMINATED_MEMBER_IP": terminated_member.member_ip,
+                          "STRATOS_MEMBER_TERMINATED_MEMBER_ID": member_terminated_event.member_id,
+                          "STRATOS_MEMBER_TERMINATED_CLUSTER_ID": member_terminated_event.cluster_id,
+                          "STRATOS_MEMBER_TERMINATED_LB_CLUSTER_ID": lb_cluster_id,
+                          "STRATOS_MEMBER_TERMINATED_NETWORK_PARTITION_ID": member_terminated_event.network_partition_id,
+                          "STRATOS_MEMBER_TERMINATED_SERVICE_NAME": member_terminated_event.service_name,
+                          "STRATOS_MEMBER_TERMINATED_MEMBER_LIST_JSON": json.dumps(cluster.member_list_json),
+                          "STRATOS_TOPOLOGY_JSON": json.dumps(topology.json_str)}
+
+            member_ips = extensionutils.get_lb_member_ip(lb_cluster_id)
+            if member_ips is not None and len(member_ips) > 1:
+                env_params["STRATOS_MEMBER_TERMINATED_LB_IP"] = member_ips[0]
+                env_params["STRATOS_MEMBER_TERMINATED_LB_PUBLIC_IP"] = member_ips[1]
+
+            extensionutils.add_properties(service.properties, env_params, "MEMBER_TERMINATED_SERVICE_PROPERTY")
+            extensionutils.add_properties(cluster.properties, env_params, "MEMBER_TERMINATED_CLUSTER_PROPERTY")
+            extensionutils.add_properties(terminated_member.properties, env_params, "MEMBER_TERMINATED_MEMBER_PROPERTY")
+
+            extensionutils.execute_member_terminated_extension(env_params)
+
+        else:
+            self.log.debug("Member terminated event is not relevant...skipping agent extension")
+
+    def on_member_suspended_event(self, member_suspended_event):
+        self.log.info("Member suspended event received: [service] " + member_suspended_event.service_name +
+                      " [cluster] " + member_suspended_event.cluster_id + " [member] " + member_suspended_event.member_id)
+
+        topology_consistent = extensionutils.check_topology_consistency(
+            member_suspended_event.service_name,
+            member_suspended_event.cluster_id,
+            member_suspended_event.member_id
+        )
+
+        if not topology_consistent:
+            self.log.error("Topology is inconsistent...failed to execute member suspended event")
+            return
+
+        topology = TopologyContext.get_topology()
+        service = topology.get_service(member_suspended_event.service_name)
+        cluster = service.get_cluster(member_suspended_event.cluster_id)
+        suspended_member = cluster.get_member(member_suspended_event.member_id)
+        lb_cluster_id = cluster.get_member(member_suspended_event.member_id).lb_cluster_id
+
+        #check whether suspended member is within the same cluster, LB cluster or service group
+        if extensionutils.is_relevant_member_event(
+                member_suspended_event.service_name,
+                member_suspended_event.cluster_id,
+                lb_cluster_id):
+
+            env_params = {"STRATOS_MEMBER_SUSPENDED_MEMBER_IP": member_suspended_event.member_ip,
+                          "STRATOS_MEMBER_SUSPENDED_MEMBER_ID": member_suspended_event.member_id,
+                          "STRATOS_MEMBER_SUSPENDED_CLUSTER_ID": member_suspended_event.cluster_id,
+                          "STRATOS_MEMBER_SUSPENDED_LB_CLUSTER_ID": lb_cluster_id,
+                          "STRATOS_MEMBER_SUSPENDED_NETWORK_PARTITION_ID": member_suspended_event.network_partition_id,
+                          "STRATOS_MEMBER_SUSPENDED_SERVICE_NAME": member_suspended_event.service_name,
+                          "STRATOS_MEMBER_SUSPENDED_MEMBER_LIST_JSON": json.dumps(cluster.member_list_json),
+                          "STRATOS_TOPOLOGY_JSON": json.dumps(topology.json_str)}
+
+            member_ips = extensionutils.get_lb_member_ip(lb_cluster_id)
+            if member_ips is not None and len(member_ips) > 1:
+                env_params["STRATOS_MEMBER_SUSPENDED_LB_IP"] = member_ips[0]
+                env_params["STRATOS_MEMBER_SUSPENDED_LB_PUBLIC_IP"] = member_ips[1]
+
+            extensionutils.add_properties(service.properties, env_params, "MEMBER_SUSPENDED_SERVICE_PROPERTY")
+            extensionutils.add_properties(cluster.properties, env_params, "MEMBER_SUSPENDED_CLUSTER_PROPERTY")
+            extensionutils.add_properties(suspended_member.properties, env_params, "MEMBER_SUSPENDED_MEMBER_PROPERTY")
+
+            extensionutils.execute_member_suspended_extension(env_params)
+
+        else:
+            self.log.debug("Member suspended event is not relevant...skipping agent extension")
+
+    def on_member_started_event(self, member_started_event):
+        self.log.info("Member started event received: [service] " + member_started_event.service_name +
+                      " [cluster] " + member_started_event.cluster_id + " [member] " + member_started_event.member_id)
+
+        topology_consistent = extensionutils.check_topology_consistency(
+            member_started_event.service_name,
+            member_started_event.cluster_id,
+            member_started_event.member_id
+        )
+
+        if not topology_consistent:
+            self.log.error("Topology is inconsistent...failed to execute member started event")
+            return
+
+        topology = TopologyContext.get_topology()
+        service = topology.get_service(member_started_event.service_name)
+        cluster = service.get_cluster(member_started_event.cluster_id)
+        started_member = cluster.get_member(member_started_event.member_id)
+        lb_cluster_id = cluster.get_member(member_started_event.member_id).lb_cluster_id
+
+        #check whether started member is within the same cluster, LB cluster or service group
+        if extensionutils.is_relevant_member_event(
+                member_started_event.service_name,
+                member_started_event.cluster_id,
+                lb_cluster_id):
+
+            env_params = {"STRATOS_MEMBER_STARTED_MEMBER_IP": started_member.member_ip,
+                          "STRATOS_MEMBER_STARTED_MEMBER_ID": member_started_event.member_id,
+                          "STRATOS_MEMBER_STARTED_CLUSTER_ID": member_started_event.cluster_id,
+                          "STRATOS_MEMBER_STARTED_LB_CLUSTER_ID": lb_cluster_id,
+                          "STRATOS_MEMBER_STARTED_NETWORK_PARTITION_ID": member_started_event.network_partition_id,
+                          "STRATOS_MEMBER_STARTED_SERVICE_NAME": member_started_event.service_name,
+                          "STRATOS_MEMBER_STARTED_MEMBER_LIST_JSON": json.dumps(cluster.member_list_json),
+                          "STRATOS_TOPOLOGY_JSON": json.dumps(topology.json_str)}
+
+            member_ips = extensionutils.get_lb_member_ip(lb_cluster_id)
+            if member_ips is not None and len(member_ips) > 1:
+                env_params["STRATOS_MEMBER_STARTED_LB_IP"] = member_ips[0]
+                env_params["STRATOS_MEMBER_STARTED_LB_PUBLIC_IP"] = member_ips[1]
+
+            extensionutils.add_properties(service.properties, env_params, "MEMBER_STARTED_SERVICE_PROPERTY")
+            extensionutils.add_properties(cluster.properties, env_params, "MEMBER_STARTED_CLUSTER_PROPERTY")
+            extensionutils.add_properties(started_member.properties, env_params, "MEMBER_STARTED_MEMBER_PROPERTY")
+
+            extensionutils.execute_member_started_extension(env_params)
+
+        else:
+            self.log.debug("Member started event is not relevant...skipping agent extension")
+
+    def start_server_extension(self):
+        #wait until complete topology message is received to get LB IP
+        extensionutils.wait_for_complete_topology()
+        self.log.info("[start server extension] complete topology event received")
+
+        service_name_in_payload = self.cartridge_agent_config.service_name
+        cluster_id_in_payload = self.cartridge_agent_config.cluster_id
+        member_id_in_payload = self.cartridge_agent_config.member_id
+
+        topology_consistant = extensionutils.check_topology_consistency(service_name_in_payload, cluster_id_in_payload, member_id_in_payload)
+
+        try:
+            if not topology_consistant:
+                self.log.error("Topology is inconsistent...failed to execute start server event")
+                return
+
+            topology = TopologyContext.get_topology()
+            service = topology.get_service(service_name_in_payload)
+            cluster = service.get_cluster(cluster_id_in_payload)
+
+            # store environment variable parameters to be passed to extension shell script
+            env_params = {}
+
+            # if clustering is enabled wait until all well known members have started
+            clustering_enabled = self.cartridge_agent_config.is_clustered
+            if clustering_enabled:
+                env_params["STRATOS_CLUSTERING"] = "true"
+                env_params["STRATOS_WK_MEMBER_COUNT"] = self.cartridge_agent_config.min_count
+
+                env_params["STRATOS_PRIMARY"] = "true" if self.cartridge_agent_config.is_primary else "false"
+
+                self.wait_for_wk_members(env_params)
+                self.log.info("All well known members have started! Resuming start server extension...")
+
+            env_params["STRATOS_TOPOLOGY_JSON"] = json.dumps(topology.json_str)
+            env_params["STRATOS_MEMBER_LIST_JSON"] = json.dumps(cluster.member_list_json)
+
+            extensionutils.execute_start_servers_extension(env_params)
+
+        except:
+            self.log.exception("Error processing start servers event")
+
+    def volume_mount_extension(self, persistence_mappings_payload):
+        extensionutils.execute_volume_mount_extension(persistence_mappings_payload)
+
+    def on_subscription_domain_added_event(self, subscription_domain_added_event):
+        tenant_domain = self.find_tenant_domain(subscription_domain_added_event.tenant_id)
+        self.log.info(
+            "Subscription domain added event received: [tenant-id] " + subscription_domain_added_event.tenant_id +
+            " [tenant-domain] " + tenant_domain + " [domain-name] " + subscription_domain_added_event.domain_name +
+            " [application-context] " + subscription_domain_added_event.application_context
+        )
+
+        env_params = {"STRATOS_SUBSCRIPTION_SERVICE_NAME": subscription_domain_added_event.service_name,
+                      "STRATOS_SUBSCRIPTION_DOMAIN_NAME": subscription_domain_added_event.domain_name,
+                      "STRATOS_SUBSCRIPTION_TENANT_ID": int(subscription_domain_added_event.tenant_id),
+                      "STRATOS_SUBSCRIPTION_TENANT_DOMAIN": tenant_domain,
+                      "STRATOS_SUBSCRIPTION_APPLICATION_CONTEXT": subscription_domain_added_event.application_context}
+
+        extensionutils.execute_subscription_domain_added_extension(env_params)
+
+    def on_subscription_domain_removed_event(self, subscription_domain_removed_event):
+        tenant_domain = self.find_tenant_domain(subscription_domain_removed_event.tenant_id)
+        self.log.info(
+            "Subscription domain removed event received: [tenant-id] " + subscription_domain_removed_event.tenant_id +
+            " [tenant-domain] " + tenant_domain + " [domain-name] " + subscription_domain_removed_event.domain_name
+        )
+
+        env_params = {"STRATOS_SUBSCRIPTION_SERVICE_NAME": subscription_domain_removed_event.service_name,
+                      "STRATOS_SUBSCRIPTION_DOMAIN_NAME": subscription_domain_removed_event.domain_name,
+                      "STRATOS_SUBSCRIPTION_TENANT_ID": int(subscription_domain_removed_event.tenant_id),
+                      "STRATOS_SUBSCRIPTION_TENANT_DOMAIN": tenant_domain}
+
+        extensionutils.execute_subscription_domain_removed_extension(env_params)
+
+    def on_copy_artifacts_extension(self, src, des):
+        extensionutils.execute_copy_artifact_extension(src, des)
+
+    def on_tenant_subscribed_event(self, tenant_subscribed_event):
+        self.log.info(
+            "Tenant subscribed event received: [tenant] " + tenant_subscribed_event.tenant_id +
+            " [service] " + tenant_subscribed_event.service_name + " [cluster] " + tenant_subscribed_event.cluster_ids
+        )
+
+        extensionutils.execute_tenant_subscribed_extension({})
+
+    def on_tenant_unsubscribed_event(self, tenant_unsubscribed_event):
+        self.log.info(
+            "Tenant unsubscribed event received: [tenant] " + tenant_unsubscribed_event.tenant_id +
+            " [service] " + tenant_unsubscribed_event.service_name +
+            " [cluster] " + tenant_unsubscribed_event.cluster_ids
+        )
+
+        try:
+            if self.cartridge_agent_config.service_name == tenant_unsubscribed_event.service_name:
+                agentgithandler.AgentGitHandler.remove_repo(tenant_unsubscribed_event.tenant_id)
+        except:
+            self.log.exception("Removing git repository failed: ")
+        extensionutils.execute_tenant_unsubscribed_extension({})
+
+    def cleanup(self):
+        self.log.info("Executing cleaning up the data in the cartridge instance...")
+
+        cartridgeagentpublisher.publish_maintenance_mode_event()
+
+        extensionutils.execute_cleanup_extension()
+        self.log.info("cleaning up finished in the cartridge instance...")
+
+        self.log.info("publishing ready to shutdown event...")
+        cartridgeagentpublisher.publish_instance_ready_to_shutdown_event()
+
+    def is_wk_member_group_ready(self, env_params, min_count):
+        topology = TopologyContext.get_topology()
+        if topology is None or not topology.initialized:
+            return False
+
+        service_group_in_payload = self.cartridge_agent_config.service_group
+        if service_group_in_payload is not None:
+            env_params["STRATOS_SERVICE_GROUP"] = service_group_in_payload
+
+        # clustering logic for apimanager
+        if service_group_in_payload is not None and service_group_in_payload == "apim":
+            # handle apistore and publisher case
+            if self.cartridge_agent_config.service_name == cartridgeagentconstants.APIMANAGER_SERVICE_NAME or \
+                    self.cartridge_agent_config.service_name == cartridgeagentconstants.PUBLISHER_SERVICE_NAME:
+
+                apistore_cluster_collection = topology.get_service(cartridgeagentconstants.APIMANAGER_SERVICE_NAME)\
+                    .get_clusters()
+                publisher_cluster_collection = topology.get_service(cartridgeagentconstants.PUBLISHER_SERVICE_NAME)\
+                    .get_clusters()
+
+                apistore_member_list = []
+                for member in apistore_cluster_collection[0].get_members():
+                    if member.status == MemberStatus.Starting or member.status == MemberStatus.Activated:
+                        apistore_member_list.append(member)
+                        self.wk_members.append(member)
+
+                if len(apistore_member_list) == 0:
+                    self.log.debug("API Store members not yet created")
+                    return False
+
+                apistore_member = apistore_member_list[0]
+                env_params["STRATOS_WK_APISTORE_MEMBER_IP"] = apistore_member.member_ip
+                self.log.debug("STRATOS_WK_APISTORE_MEMBER_IP: %r" % apistore_member.member_ip)
+
+                publisher_member_list = []
+                for member in publisher_cluster_collection[0].get_members():
+                    if member.status == MemberStatus.Starting or member.status == MemberStatus.Activated:
+                        publisher_member_list.append(member)
+                        self.wk_members.append(member)
+
+                if len(publisher_member_list) == 0:
+                    self.log.debug("API Publisher members not yet created")
+
+                publisher_member = publisher_member_list[0]
+                env_params["STRATOS_WK_PUBLISHER_MEMBER_IP"] = publisher_member.member_ip
+                self.log.debug("STRATOS_WK_PUBLISHER_MEMBER_IP: %r" % publisher_member.member_ip)
+
+                return True
+
+            elif self.cartridge_agent_config.service_name == cartridgeagentconstants.GATEWAY_MGT_SERVICE_NAME or \
+                    self.cartridge_agent_config.service_name == cartridgeagentconstants.GATEWAY_SERVICE_NAME:
+
+                if self.cartridge_agent_config.deployment is not None:
+                    # check if deployment is Manager Worker separated
+                    if self.cartridge_agent_config.deployment.lower() == cartridgeagentconstants.DEPLOYMENT_MANAGER.lower() or \
+                            self.cartridge_agent_config.deployment.lower() == cartridgeagentconstants.DEPLOYMENT_WORKER.lower():
+
+                        self.log.info("Deployment pattern for the node: %r" % self.cartridge_agent_config.deployment)
+                        env_params["DEPLOYMENT"] = self.cartridge_agent_config.deployment
+                        # check if WKA members of Manager Worker separated deployment is ready
+                        return self.is_manager_worker_WKA_group_ready(env_params)
+
+            elif self.cartridge_agent_config.service_name == cartridgeagentconstants.KEY_MANAGER_SERVICE_NAME:
+                return True
+
+        else:
+            if self.cartridge_agent_config.deployment is not None:
+                # check if deployment is Manager Worker separated
+                if self.cartridge_agent_config.deployment.lower() == cartridgeagentconstants.DEPLOYMENT_MANAGER.lower() or \
+                        self.cartridge_agent_config.deployment.lower() == cartridgeagentconstants.DEPLOYMENT_WORKER.lower():
+
+                    self.log.info("Deployment pattern for the node: %r" % self.cartridge_agent_config.deployment)
+                    env_params["DEPLOYMENT"] = self.cartridge_agent_config.deployment
+                    # check if WKA members of Manager Worker separated deployment is ready
+                    return self.is_manager_worker_WKA_group_ready(env_params)
+
+            service_name_in_payload = self.cartridge_agent_config.service_name
+            cluster_id_in_payload = self.cartridge_agent_config.cluster_id
+            service = topology.get_service(service_name_in_payload)
+            cluster = service.get_cluster(cluster_id_in_payload)
+
+            wk_members = []
+            for member in cluster.get_members():
+                if member.properties is not None and \
+                        cartridgeagentconstants.PRIMARY in member.properties \
+                        and member.properties[cartridgeagentconstants.PRIMARY].lower() == "true" and \
+                        (member.status == MemberStatus.Starting or member.status == MemberStatus.Activated):
+
+                    wk_members.append(member)
+                    self.wk_members.append(member)
+                    self.log.debug("Found WKA: STRATOS_WK_MEMBER_IP: " + member.member_ip)
+
+            if len(wk_members) >= min_count:
+                idx = 0
+                for member in wk_members:
+                    env_params["STRATOS_WK_MEMBER_" + idx + "_IP"] = member.member_ip
+                    self.log.debug("STRATOS_WK_MEMBER_" + idx + "_IP:" + member.member_ip)
+
+                    idx += 1
+
+                return True
+
+        return False
+
+    # generic worker manager separated clustering logic
+    def is_manager_worker_WKA_group_ready(self, env_params):
+
+        # for this, we need both manager cluster service name and worker cluster service name
+        manager_service_name = self.cartridge_agent_config.manager_service_name
+        worker_service_name = self.cartridge_agent_config.worker_service_name
+
+        # managerServiceName and workerServiceName both should not be null /empty
+        if manager_service_name is None or manager_service_name.strip() == "":
+            self.log.error("Manager service name [ " + manager_service_name + " ] is invalid")
+            return False
+
+        if worker_service_name is None or worker_service_name.strip() == "":
+            self.log.error("Worker service name [ " + worker_service_name + " ] is invalid")
+            return False
+
+        min_manager_instances_available = False
+        min_worker_instances_available = False
+
+        topology = TopologyContext.get_topology()
+        manager_service = topology.get_service(manager_service_name)
+        worker_service = topology.get_service(worker_service_name)
+
+        if manager_service is None:
+            self.log.warn("Service [ " + manager_service_name + " ] is not found")
+            return False
+
+        if worker_service is None:
+            self.log.warn("Service [ " + worker_service_name + " ] is not found")
+            return False
+
+        # manager clusters
+        manager_clusters = manager_service.get_clusters()
+        if manager_clusters is None or len(manager_clusters) == 0:
+            self.log.warn("No clusters found for service [ " + manager_service_name + " ]")
+            return False
+
+        manager_min_instance_count = 1
+        manager_min_instance_count_found = False
+
+        manager_wka_members = []
+        for member in manager_clusters[0].get_members():
+            if member.properties is not None and \
+                    cartridgeagentconstants.PRIMARY in member.properties \
+                    and member.properties[cartridgeagentconstants.PRIMARY].lower() == "true" and \
+                    (member.status == MemberStatus.Starting or member.status == MemberStatus.Activated):
+
+                manager_wka_members.append(member)
+                self.wk_members.append(member)
+
+                # get the min instance count
+                if not manager_min_instance_count_found:
+                    manager_min_instance_count = self.get_min_instance_count_from_member(member)
+                    manager_min_instance_count_found = True
+                    self.log.info("Manager min instance count: " + manager_min_instance_count)
+
+        if len(manager_wka_members) >= manager_min_instance_count:
+            min_manager_instances_available = True
+            idx = 0
+            for member in manager_wka_members:
+                env_params["STRATOS_WK_MANAGER_MEMBER_" + idx + "_IP"] = member.member_ip
+                self.log.debug("STRATOS_WK_MANAGER_MEMBER_" + idx + "_IP: " + member.member_ip)
+                idx += 1
+
+            env_params["STRATOS_WK_MANAGER_MEMBER_COUNT"] = int(manager_min_instance_count)
+
+        # If all the manager members are non primary and is greate than or equal to mincount,
+        # minManagerInstancesAvailable should be true
+        all_managers_non_primary = True
+        for member in manager_clusters[0].get_members():
+            # get the min instance count
+            if not manager_min_instance_count_found:
+                manager_min_instance_count = self.get_min_instance_count_from_member(member)
+                manager_min_instance_count_found = True
+                self.log.info(
+                    "Manager min instance count when allManagersNonPrimary true : " + manager_min_instance_count)
+
+            if member.properties is not None and cartridgeagentconstants.PRIMARY in member.properties and \
+                    member.properties[cartridgeagentconstants.PRIMARY].lower() == "true":
+                all_managers_non_primary = False
+                break
+
+        self.log.debug(
+            " allManagerNonPrimary & managerMinInstanceCount [" + all_managers_non_primary +
+            "], [" + manager_min_instance_count + "] ")
+
+        if all_managers_non_primary and len(manager_clusters) >= manager_min_instance_count:
+            min_manager_instances_available = True
+
+        # worker cluster
+        worker_clusters = worker_service.get_clusters()
+        if worker_clusters is None or len(worker_clusters) == 0:
+            self.log.warn("No clusters found for service [ " + worker_service_name + " ]")
+            return False
+
+        worker_min_instance_count = 1
+        worker_min_instance_count_found = False
+
+        worker_wka_members = []
+        for member in worker_clusters[0].get_members():
+            self.log.debug("Checking member : " + member.member_id)
+
+            if member.properties is not None and cartridgeagentconstants.PRIMARY in member.properties and \
+                    member.properties[cartridgeagentconstants.PRIMARY].lower() == "true" and \
+                    (member.status == MemberStatus.Starting or member.status == MemberStatus.Activated):
+
+                self.log.debug("Added worker member " + member.member_id)
+
+                worker_wka_members.append(member)
+                self.wk_members.append(member)
+
+                # get the min instance count
+                if not worker_min_instance_count_found:
+                    worker_min_instance_count = self.get_min_instance_count_from_member(member)
+                    worker_min_instance_count_found = True
+                    self.log.debug("Worker min instance count: " + worker_min_instance_count)
+
+        if len(worker_wka_members) >= worker_min_instance_count:
+            min_worker_instances_available = True
+            idx = 0
+            for member in worker_wka_members:
+                env_params["STRATOS_WK_WORKER_MEMBER_" + idx + "_IP"] = member.member_ip
+                self.log.debug("STRATOS_WK_WORKER_MEMBER_" + idx + "_IP: " + member.member_ip)
+                idx += 1
+
+            env_params["STRATOS_WK_WORKER_MEMBER_COUNT"] = int(worker_min_instance_count)
+
+        self.log.debug(
+            " Returnning values minManagerInstancesAvailable && minWorkerInstancesAvailable [" +
+            min_manager_instances_available + "],  [" + min_worker_instances_available + "] ")
+
+        return min_manager_instances_available and min_worker_instances_available
+
+    def get_min_instance_count_from_member(self, member):
+        if cartridgeagentconstants.MIN_COUNT in member.properties:
+            return int(member.properties[cartridgeagentconstants.MIN_COUNT])
+
+        return 1
+
+    def find_tenant_domain(self, tenant_id):
+        tenant = TenantContext.get_tenant(tenant_id)
+        if tenant is None:
+            raise RuntimeError("Tenant could not be found: [tenant-id] %r" % tenant_id)
+
+        return tenant.tenant_domain
+
+    def wait_for_wk_members(self, env_params):
+        min_count = int(self.cartridge_agent_config.min_count)
+        is_wk_member_group_ready = False
+        while not is_wk_member_group_ready:
+            self.log.info("Waiting for %r well known members..." % min_count)
+
+            time.sleep(5)
+
+            is_wk_member_group_ready = self.is_wk_member_group_ready(env_params, min_count)
+
+from ..artifactmgt.git import agentgithandler
+from ..artifactmgt.repositoryinformation import RepositoryInformation
+from ..config.cartridgeagentconfiguration import CartridgeAgentConfiguration
+from ..publisher import cartridgeagentpublisher
+from ..exception.parameternotfoundexception import ParameterNotFoundException
+from ..topology.topologycontext import *
+from ..tenant.tenantcontext import *
+from ..util.log import LogFactory
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/stratos/blob/bcddfbad/tools/python-cartridge-agent/cartridgeagent/modules/healthstatspublisher/__init__.py
----------------------------------------------------------------------
diff --git a/tools/python-cartridge-agent/cartridgeagent/modules/healthstatspublisher/__init__.py b/tools/python-cartridge-agent/cartridgeagent/modules/healthstatspublisher/__init__.py
new file mode 100644
index 0000000..13a8339
--- /dev/null
+++ b/tools/python-cartridge-agent/cartridgeagent/modules/healthstatspublisher/__init__.py
@@ -0,0 +1,16 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.

http://git-wip-us.apache.org/repos/asf/stratos/blob/bcddfbad/tools/python-cartridge-agent/cartridgeagent/modules/healthstatspublisher/abstracthealthstatisticspublisher.py
----------------------------------------------------------------------
diff --git a/tools/python-cartridge-agent/cartridgeagent/modules/healthstatspublisher/abstracthealthstatisticspublisher.py b/tools/python-cartridge-agent/cartridgeagent/modules/healthstatspublisher/abstracthealthstatisticspublisher.py
new file mode 100644
index 0000000..685344d
--- /dev/null
+++ b/tools/python-cartridge-agent/cartridgeagent/modules/healthstatspublisher/abstracthealthstatisticspublisher.py
@@ -0,0 +1,62 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+class AbstractHealthStatisticsReader:
+    """
+    Abstract class to implement to create a custom health stat reader
+    """
+
+    def stat_cartridge_health(self):
+        """
+        Abstract method that when implemented reads the memory usage and the load average
+        of the instance running the agent and returns a CartridgeHealthStatistics object
+        with the information
+
+        :return: CartridgeHealthStatistics object with memory usage and load average values
+        :rtype : CartridgeHealthStatistics
+        """
+        raise NotImplementedError
+
+
+class CartridgeHealthStatistics:
+    """
+    Holds the memory usage and load average reading
+    """
+
+    def __init__(self):
+        self.memory_usage = None
+        """:type : float"""
+        self.load_avg = None
+        """:type : float"""
+
+
+class CEPPublisherException(Exception):
+    """
+    Exception to be used during CEP publishing operations
+    """
+
+    def __init__(self, msg):
+        super(self,  msg)
+        self.message = msg
+
+    def get_message(self):
+        """
+        The message provided when the exception is raised
+        :return: message
+        :rtype: str
+        """
+        return self.message