Messengers allow independent applications to communicate with one another without any direct knowledge of each other. Usage Scenarios Independent applications need to exchange information. Two instances of the same application need to share information.
Application needs to start up a specialized helper application if a certain situation occurs.
Next Back Inter-Process Communication Using ToolTalk and the messenger Library ToolTalk and the Messenger Library ToolTalk Service Enables independent applications to communicate with one another without having direct knowledge of each other. Two ways of Registering Interest in a message As a message Observer Cannot reply to it directly. Guarenteed to see all messages that match the message pattern. Notices should be observed. Only one process is allowed to handle a specific message.