@startuml Message Retransmission
header Message Retransmission / Service Library
database "Database_Pub" {
    folder "This is log Location 1" {
        [Messages]
    }
}
database "Database_Con" {
    folder "This is log Location 2" {
        [Messages2]
    }
}

component "CDMS_Pub"{
    [MRS1]

}

component "CDMS_Con"{
    [MRS2]
}

component "Publisher"{
    [OBS1] - [MRS_Pub]
    [MRS_Pub]
}

component "Consumer"{
    [MRS_Con]
    [OBS2] - [MRS_Con]
}
 
[MRS1] -- [MRS2]
[Messages] <. CDMS_Pub
[Messages2] <. CDMS_Con
[OBS1] .> CDMS_Pub
[OBS2] .> CDMS_Con
' CDMS_Pub - CDMS_Con : Synchronization over MRS library
[MRS_Pub] -- [MRS_Con] : Basic Synchronization

@enduml

' Square are ports. I use them to represent the Message Retransmission Service
' So, when Publisher creates messages from the relevant library, it will then
' store in to it's own designated database, and will also attempt to broadcast
' to the consumer it's relevant information. 
' They can perform basic synhronization or utilzie the CDMC: Content Delivery Management Server
' to manage the message payload by leveraging the MRS library to do the synching
' MRS library will check the data loss by taking the specified data to be 
' compared and then perform retransmission if needed.

' Rearrage the position
' use MR_S_Pub1 MR_S_Con1 MR_S_Pub2 MR_S_Con2