Description of the Client entity
The Client entity does not implement an interface, so all you need to do is declare the entity name in the EDL description.
Client.edl
/* Description of the Client entity. */
entity ping.Client
Server entity description
The Server entity implements a Connection interface, which contains two methods: Ping and Pong. As in the echo example, you must declare a separate component, such as Control, which contains a Connection interface implementation.
In the EDL description of the Server entity, you must indicate that it contains an instance of the Control component:
Server.edl
/* Description of the Server entity. */
entity ping.Server
/* controlimpl is a named instance of the ping.Control component. */
components {
controlimpl : ping.Control
}
In the CDL description of the Control component, you must indicate that it contains a Connection interface implementation:
Control.cdl
/* Description of the Control component. */
component ping.Control
/* connectionimpl is the ping.Connection interface implementation. */
interfaces {
connectionimpl : ping.Connection
}
In the Connection package, you must declare the Connection interface, which contains two methods: Ping and Pong:
Connection.idl
/* Description of the Connection package. */
package ping.Connection
interface {
Ping(in UInt32 value, out UInt32 result);
Pong(in UInt32 value, out UInt32 result);
}
Init description
To enable the Client entity to call a Server entity method, an IPC channel must be created between them.
init.yaml
entities:
- name: ping.Client
connections:
- target: ping.Server
id: server_connection
- name: ping.Server
The channel is named server_connection. You can obtain the handle of this channel by using the Service Locator.