TK-2925 Add support for loadbalancer config in ConfigHelper

Adding new ConfigItem classes, that will be used to decouple the configureation from the ConfigHelper class.

The idea is to use mix of Flyweight and Facade implementation in order to the correct classes without having so many ifs and private static methods.

core/src/com/cloud/agent/resource/virtualnetwork/facade/AbstractConfigItemFacade.java

@@ -0,0 +1,32 @@
+//
+// 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.
+//
+
+package com.cloud.agent.resource.virtualnetwork.facade;
+
+import java.util.List;
+
+import com.cloud.agent.api.routing.NetworkElementCommand;
+import com.cloud.agent.resource.virtualnetwork.ConfigItem;
+import com.cloud.agent.resource.virtualnetwork.model.ConfigBase;
+
+public abstract class AbstractConfigItemFacade {
+    public abstract List<ConfigItem> generateConfig(NetworkElementCommand cmd);
+
+    public abstract List<ConfigItem> generateConfigItems(ConfigBase configuration);
+}

core/src/com/cloud/agent/resource/virtualnetwork/facade/BumUpPriorityConfigItem.java

@@ -0,0 +1,36 @@
+//
+// 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.
+//
+
+package com.cloud.agent.resource.virtualnetwork.facade;
+
+import java.util.List;
+
+import com.cloud.agent.api.routing.NetworkElementCommand;
+import com.cloud.agent.resource.virtualnetwork.ConfigItem;
+import com.cloud.agent.resource.virtualnetwork.model.ConfigBase;
+
+public class BumUpPriorityConfigItem {
+    public List<ConfigItem> generateConfig(final NetworkElementCommand cmd) {
+        return null;
+    }
+
+    public List<ConfigItem> generateConfigItems(final ConfigBase configuration) {
+        return null;
+    }
+}

core/src/com/cloud/agent/resource/virtualnetwork/facade/CreateIpAliasConfigItem.java

@@ -0,0 +1,36 @@
+//
+// 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.
+//
+
+package com.cloud.agent.resource.virtualnetwork.facade;
+
+import java.util.List;
+
+import com.cloud.agent.api.routing.NetworkElementCommand;
+import com.cloud.agent.resource.virtualnetwork.ConfigItem;
+import com.cloud.agent.resource.virtualnetwork.model.ConfigBase;
+
+public class CreateIpAliasConfigItem {
+    public List<ConfigItem> generateConfig(final NetworkElementCommand cmd) {
+        return null;
+    }
+
+    public List<ConfigItem> generateConfigItems(final ConfigBase configuration) {
+        return null;
+    }
+}

core/src/com/cloud/agent/resource/virtualnetwork/facade/DeleteIpAliasConfigItem.java

@@ -0,0 +1,36 @@
+//
+// 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.
+//
+
+package com.cloud.agent.resource.virtualnetwork.facade;
+
+import java.util.List;
+
+import com.cloud.agent.api.routing.NetworkElementCommand;
+import com.cloud.agent.resource.virtualnetwork.ConfigItem;
+import com.cloud.agent.resource.virtualnetwork.model.ConfigBase;
+
+public class DeleteIpAliasConfigItem {
+    public List<ConfigItem> generateConfig(final NetworkElementCommand cmd) {
+        return null;
+    }
+
+    public List<ConfigItem> generateConfigItems(final ConfigBase configuration) {
+        return null;
+    }
+}

core/src/com/cloud/agent/resource/virtualnetwork/facade/DhcpEntryConfigItem.java

@@ -0,0 +1,36 @@
+//
+// 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.
+//
+
+package com.cloud.agent.resource.virtualnetwork.facade;
+
+import java.util.List;
+
+import com.cloud.agent.api.routing.NetworkElementCommand;
+import com.cloud.agent.resource.virtualnetwork.ConfigItem;
+import com.cloud.agent.resource.virtualnetwork.model.ConfigBase;
+
+public class DhcpEntryConfigItem {
+    public List<ConfigItem> generateConfig(final NetworkElementCommand cmd) {
+        return null;
+    }
+
+    public List<ConfigItem> generateConfigItems(final ConfigBase configuration) {
+        return null;
+    }
+}

core/src/com/cloud/agent/resource/virtualnetwork/facade/DnsMasqConfigItem.java

@@ -0,0 +1,36 @@
+//
+// 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.
+//
+
+package com.cloud.agent.resource.virtualnetwork.facade;
+
+import java.util.List;
+
+import com.cloud.agent.api.routing.NetworkElementCommand;
+import com.cloud.agent.resource.virtualnetwork.ConfigItem;
+import com.cloud.agent.resource.virtualnetwork.model.ConfigBase;
+
+public class DnsMasqConfigItem {
+    public List<ConfigItem> generateConfig(final NetworkElementCommand cmd) {
+        return null;
+    }
+
+    public List<ConfigItem> generateConfigItems(final ConfigBase configuration) {
+        return null;
+    }
+}

core/src/com/cloud/agent/resource/virtualnetwork/facade/IpAssociationConfigItem.java

@@ -0,0 +1,36 @@
+//
+// 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.
+//
+
+package com.cloud.agent.resource.virtualnetwork.facade;
+
+import java.util.List;
+
+import com.cloud.agent.api.routing.NetworkElementCommand;
+import com.cloud.agent.resource.virtualnetwork.ConfigItem;
+import com.cloud.agent.resource.virtualnetwork.model.ConfigBase;
+
+public class IpAssociationConfigItem {
+    public List<ConfigItem> generateConfig(final NetworkElementCommand cmd) {
+        return null;
+    }
+
+    public List<ConfigItem> generateConfigItems(final ConfigBase configuration) {
+        return null;
+    }
+}

core/src/com/cloud/agent/resource/virtualnetwork/facade/LoadBalancerConfigItem.java

@@ -0,0 +1,36 @@
+//
+// 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.
+//
+
+package com.cloud.agent.resource.virtualnetwork.facade;
+
+import java.util.List;
+
+import com.cloud.agent.api.routing.NetworkElementCommand;
+import com.cloud.agent.resource.virtualnetwork.ConfigItem;
+import com.cloud.agent.resource.virtualnetwork.model.ConfigBase;
+
+public class LoadBalancerConfigItem {
+    public List<ConfigItem> generateConfig(final NetworkElementCommand cmd) {
+        return null;
+    }
+
+    public List<ConfigItem> generateConfigItems(final ConfigBase configuration) {
+        return null;
+    }
+}

core/src/com/cloud/agent/resource/virtualnetwork/facade/RemoteAccessVpnConfigItem.java

@@ -0,0 +1,36 @@
+//
+// 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.
+//
+
+package com.cloud.agent.resource.virtualnetwork.facade;
+
+import java.util.List;
+
+import com.cloud.agent.api.routing.NetworkElementCommand;
+import com.cloud.agent.resource.virtualnetwork.ConfigItem;
+import com.cloud.agent.resource.virtualnetwork.model.ConfigBase;
+
+public class RemoteAccessVpnConfigItem {
+    public List<ConfigItem> generateConfig(final NetworkElementCommand cmd) {
+        return null;
+    }
+
+    public List<ConfigItem> generateConfigItems(final ConfigBase configuration) {
+        return null;
+    }
+}

core/src/com/cloud/agent/resource/virtualnetwork/facade/SavePasswordConfigItem.java

@@ -0,0 +1,36 @@
+//
+// 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.
+//
+
+package com.cloud.agent.resource.virtualnetwork.facade;
+
+import java.util.List;
+
+import com.cloud.agent.api.routing.NetworkElementCommand;
+import com.cloud.agent.resource.virtualnetwork.ConfigItem;
+import com.cloud.agent.resource.virtualnetwork.model.ConfigBase;
+
+public class SavePasswordConfigItem {
+    public List<ConfigItem> generateConfig(final NetworkElementCommand cmd) {
+        return null;
+    }
+
+    public List<ConfigItem> generateConfigItems(final ConfigBase configuration) {
+        return null;
+    }
+}

core/src/com/cloud/agent/resource/virtualnetwork/facade/SetFirewallRulesConfigItem.java

@@ -0,0 +1,36 @@
+//
+// 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.
+//
+
+package com.cloud.agent.resource.virtualnetwork.facade;
+
+import java.util.List;
+
+import com.cloud.agent.api.routing.NetworkElementCommand;
+import com.cloud.agent.resource.virtualnetwork.ConfigItem;
+import com.cloud.agent.resource.virtualnetwork.model.ConfigBase;
+
+public class SetFirewallRulesConfigItem {
+    public List<ConfigItem> generateConfig(final NetworkElementCommand cmd) {
+        return null;
+    }
+
+    public List<ConfigItem> generateConfigItems(final ConfigBase configuration) {
+        return null;
+    }
+}

core/src/com/cloud/agent/resource/virtualnetwork/facade/SetGuestNetworkConfigItem.java

@@ -0,0 +1,36 @@
+//
+// 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.
+//
+
+package com.cloud.agent.resource.virtualnetwork.facade;
+
+import java.util.List;
+
+import com.cloud.agent.api.routing.NetworkElementCommand;
+import com.cloud.agent.resource.virtualnetwork.ConfigItem;
+import com.cloud.agent.resource.virtualnetwork.model.ConfigBase;
+
+public class SetGuestNetworkConfigItem {
+    public List<ConfigItem> generateConfig(final NetworkElementCommand cmd) {
+        return null;
+    }
+
+    public List<ConfigItem> generateConfigItems(final ConfigBase configuration) {
+        return null;
+    }
+}

core/src/com/cloud/agent/resource/virtualnetwork/facade/SetMonitorServiceConfigItem.java

@@ -0,0 +1,36 @@
+//
+// 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.
+//
+
+package com.cloud.agent.resource.virtualnetwork.facade;
+
+import java.util.List;
+
+import com.cloud.agent.api.routing.NetworkElementCommand;
+import com.cloud.agent.resource.virtualnetwork.ConfigItem;
+import com.cloud.agent.resource.virtualnetwork.model.ConfigBase;
+
+public class SetMonitorServiceConfigItem {
+    public List<ConfigItem> generateConfig(final NetworkElementCommand cmd) {
+        return null;
+    }
+
+    public List<ConfigItem> generateConfigItems(final ConfigBase configuration) {
+        return null;
+    }
+}

core/src/com/cloud/agent/resource/virtualnetwork/facade/SetNetworkAclConfigItem.java

@@ -0,0 +1,36 @@
+//
+// 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.
+//
+
+package com.cloud.agent.resource.virtualnetwork.facade;
+
+import java.util.List;
+
+import com.cloud.agent.api.routing.NetworkElementCommand;
+import com.cloud.agent.resource.virtualnetwork.ConfigItem;
+import com.cloud.agent.resource.virtualnetwork.model.ConfigBase;
+
+public class SetNetworkAclConfigItem {
+    public List<ConfigItem> generateConfig(final NetworkElementCommand cmd) {
+        return null;
+    }
+
+    public List<ConfigItem> generateConfigItems(final ConfigBase configuration) {
+        return null;
+    }
+}

core/src/com/cloud/agent/resource/virtualnetwork/facade/SetPortForwardingRulusConfigItem.java

@@ -0,0 +1,36 @@
+//
+// 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.
+//
+
+package com.cloud.agent.resource.virtualnetwork.facade;
+
+import java.util.List;
+
+import com.cloud.agent.api.routing.NetworkElementCommand;
+import com.cloud.agent.resource.virtualnetwork.ConfigItem;
+import com.cloud.agent.resource.virtualnetwork.model.ConfigBase;
+
+public class SetPortForwardingRulusConfigItem {
+    public List<ConfigItem> generateConfig(final NetworkElementCommand cmd) {
+        return null;
+    }
+
+    public List<ConfigItem> generateConfigItems(final ConfigBase configuration) {
+        return null;
+    }
+}

core/src/com/cloud/agent/resource/virtualnetwork/facade/SetPortForwardingRulusVpcConfigItem.java

@@ -0,0 +1,36 @@
+//
+// 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.
+//
+
+package com.cloud.agent.resource.virtualnetwork.facade;
+
+import java.util.List;
+
+import com.cloud.agent.api.routing.NetworkElementCommand;
+import com.cloud.agent.resource.virtualnetwork.ConfigItem;
+import com.cloud.agent.resource.virtualnetwork.model.ConfigBase;
+
+public class SetPortForwardingRulusVpcConfigItem {
+    public List<ConfigItem> generateConfig(final NetworkElementCommand cmd) {
+        return null;
+    }
+
+    public List<ConfigItem> generateConfigItems(final ConfigBase configuration) {
+        return null;
+    }
+}

core/src/com/cloud/agent/resource/virtualnetwork/facade/SetSourceNatConfigItem.java

@@ -0,0 +1,36 @@
+//
+// 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.
+//
+
+package com.cloud.agent.resource.virtualnetwork.facade;
+
+import java.util.List;
+
+import com.cloud.agent.api.routing.NetworkElementCommand;
+import com.cloud.agent.resource.virtualnetwork.ConfigItem;
+import com.cloud.agent.resource.virtualnetwork.model.ConfigBase;
+
+public class SetSourceNatConfigItem {
+    public List<ConfigItem> generateConfig(final NetworkElementCommand cmd) {
+        return null;
+    }
+
+    public List<ConfigItem> generateConfigItems(final ConfigBase configuration) {
+        return null;
+    }
+}

core/src/com/cloud/agent/resource/virtualnetwork/facade/SetStaticNatRulesConfigItem.java

@@ -0,0 +1,36 @@
+//
+// 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.
+//
+
+package com.cloud.agent.resource.virtualnetwork.facade;
+
+import java.util.List;
+
+import com.cloud.agent.api.routing.NetworkElementCommand;
+import com.cloud.agent.resource.virtualnetwork.ConfigItem;
+import com.cloud.agent.resource.virtualnetwork.model.ConfigBase;
+
+public class SetStaticNatRulesConfigItem {
+    public List<ConfigItem> generateConfig(final NetworkElementCommand cmd) {
+        return null;
+    }
+
+    public List<ConfigItem> generateConfigItems(final ConfigBase configuration) {
+        return null;
+    }
+}

core/src/com/cloud/agent/resource/virtualnetwork/facade/SetStaticRouteConfigItem.java

@@ -0,0 +1,36 @@
+//
+// 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.
+//
+
+package com.cloud.agent.resource.virtualnetwork.facade;
+
+import java.util.List;
+
+import com.cloud.agent.api.routing.NetworkElementCommand;
+import com.cloud.agent.resource.virtualnetwork.ConfigItem;
+import com.cloud.agent.resource.virtualnetwork.model.ConfigBase;
+
+public class SetStaticRouteConfigItem {
+    public List<ConfigItem> generateConfig(final NetworkElementCommand cmd) {
+        return null;
+    }
+
+    public List<ConfigItem> generateConfigItems(final ConfigBase configuration) {
+        return null;
+    }
+}

core/src/com/cloud/agent/resource/virtualnetwork/facade/Site2SiteVpnConfigItem.java

@@ -0,0 +1,36 @@
+//
+// 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.
+//
+
+package com.cloud.agent.resource.virtualnetwork.facade;
+
+import java.util.List;
+
+import com.cloud.agent.api.routing.NetworkElementCommand;
+import com.cloud.agent.resource.virtualnetwork.ConfigItem;
+import com.cloud.agent.resource.virtualnetwork.model.ConfigBase;
+
+public class Site2SiteVpnConfigItem {
+    public List<ConfigItem> generateConfig(final NetworkElementCommand cmd) {
+        return null;
+    }
+
+    public List<ConfigItem> generateConfigItems(final ConfigBase configuration) {
+        return null;
+    }
+}

core/src/com/cloud/agent/resource/virtualnetwork/facade/VmDataConfigItem.java

@@ -0,0 +1,36 @@
+//
+// 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.
+//
+
+package com.cloud.agent.resource.virtualnetwork.facade;
+
+import java.util.List;
+
+import com.cloud.agent.api.routing.NetworkElementCommand;
+import com.cloud.agent.resource.virtualnetwork.ConfigItem;
+import com.cloud.agent.resource.virtualnetwork.model.ConfigBase;
+
+public class VmDataConfigItem {
+    public List<ConfigItem> generateConfig(final NetworkElementCommand cmd) {
+        return null;
+    }
+
+    public List<ConfigItem> generateConfigItems(final ConfigBase configuration) {
+        return null;
+    }
+}

core/src/com/cloud/agent/resource/virtualnetwork/facade/VpnUsersConfigItem.java

@@ -0,0 +1,36 @@
+//
+// 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.
+//
+
+package com.cloud.agent.resource.virtualnetwork.facade;
+
+import java.util.List;
+
+import com.cloud.agent.api.routing.NetworkElementCommand;
+import com.cloud.agent.resource.virtualnetwork.ConfigItem;
+import com.cloud.agent.resource.virtualnetwork.model.ConfigBase;
+
+public class VpnUsersConfigItem {
+    public List<ConfigItem> generateConfig(final NetworkElementCommand cmd) {
+        return null;
+    }
+
+    public List<ConfigItem> generateConfigItems(final ConfigBase configuration) {
+        return null;
+    }
+}