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Using the Integration Capabilities of the VPO Motif-based GUI
Event Integration Through Messages
Chapter 3 117
Output to Agent and Server Message Stream Interface (MSI)
You can choose whether to output messages to a message stream
interface so that they can be accessed by external applications, or to
disable these features entirely. When disabled, messages matching the
message conditions cannot be accessed by processes using the server or
agent MSI.
To output messages to either the server or agent MSI, you can choose
either to:
❏ Allow a message that matches the condition to be copied to the MSI.
If the message is read by a process using the MSI, then written back
to VPO, it will be duplicated.
❏ Allow a message that matches the condition to be diverted to the MSI.
If the message is read by a process using the MSI that does not write
it back to the internal message stream, it is lost, which may be the
intended behavior. For example, an event correlation mechanism on
the management server might compress multiple related messages
into a single, more meaningful message.
Furthermore, if the Divert Messages option is enabled, you can also
define whether immediate local actions should be allowed. It might be
useful to disable local automatic actions if the messages matching the
condition are expected to be removed from the message stream at the
management server, for example, by a process using the MSI that
discards diverted messages. If local automatic actions are disabled,
the automatic action is started if the message finally arrives in the
database at the VPO management server. This means that an
automatic action will not be started if the message is removed from
the message stream.