omniEvents - CORBA Event Service daemon
omniEvents [-p port] [-a endpoint] [-l directory] [-P pidfile]
[-N factory-name] [-f] [-t file] [-vVh]
omniEvents is a CORBA Event Service server program. It is designed to
be run as a standalone daemon process.
The server continuously saves its state to a file. Event channels are
re-created from this file each time the server restarts. The options -p
and -a affect the identity of the server’s event channels, so these
options can only be set the first time the server is run.
Servers may be configured to operate in pairs - if one fails then
clients automatically switch over to the alternate.
Sets the TCP port on which a new server will listen. The default
This value is stored in the new server’s persistent state. There
is no need to supply this option when a server is restarted,
since the value is read from the file. If the option is supplied
then it is simply compared with the stored value - if the two do
not match then the program exits with an error.
Sets an alternate endPoint for a new server. All CORBA object
references generated by the server include the alternate
address. When clients cannot contact the server, they
automatically fall back to trying the alternate address.
This option is exactly equivalent to the ORB parameter
endPointNoListen, except that the value is saved in the server’s
persistency file, so that it is remembered whenever omniEvents
The format for a TCP endpoint is giop:tcp:HOST:PORT, for
example: -a giop:tcp:secondary.host:11169
This value is stored in the server’s persistent state. There is
no need to supply this option when a server is restarted, since
the value is read from the file. If the option is supplied then
it is simply compared with the stored value - if the two do not
match then the program exits with an error.
Full path to data directory, where omniEvents stores its
persistent state. The default is /var/lib/omniEvents
Keep track of the currently running omniEvents process in
pidfile, which should usually be /var/run/omniEvents.pid. If
pidfile already exists, then the server refuses to start. The
default is to not write a PID file.
Sets the CORBA Name Service name for the EventChannelFactory
CORBA object. Each time the server starts, it registers its
channel factory object with factory-name in the Name Service.
Format for name:
Examples: foo, foo.bar, foo.bar/baz/qux, foo/bar/baz.qux.
The default is EventChannelFactory
-f Run the server in the foreground (do not daemonize).
Send trace messages to file instead of syslog.
-v Output the CORBA IOR of the EventChannelFactory CORBA object
when the server starts. This will go either to syslog or to the
current trace file.
-V Display version.
-h Display a short summary of command-line options.
Standard omniORB options. see omniORB documentation for details.
Do NOT use this option to set the endPoint or alternateEndPoint.
This option is commonly used to set the omniORB traceLevel, in
order to get more detailed output.
Example: -ORBtraceLevel 5
EVENT CHANNEL PARAMETERS
The omniEvents::EventChannelFactory object implements the standard
CosLifeCycle::GenericFactory interface. An EventChannel object is
created by a call to the create_object(key,the_criteria) operation.
The ‘‘key’’ parameter must be set to ‘‘EventChannel’’.‘‘object
interface’’. The ‘‘the_criteria’’ parameter is a sequence of various
service parameters. Supported parameters are listed below.
Sets the cycle period of the channel (nanoseconds). This is the
time that the channel waits before transferring messages from
the incoming queue to the outgoing queue. While messages are
being transferred, incoming calls are queued. The default is 0.1
Only types whose RepositoryId matches the parameter are
permitted to pass through the channel. Other events are silently
Sets the name by which the EventChannel is known in omniEvents’
INSPOA. You can refer to the channel with a corbaloc string like
The maximum number of ProxyPullSuppliers per channel.
How many events are buffered by the ConsumerAdmin object. The
discard policy is FIFO, meaning that the oldest events are
discarded first in case of overflow.
Period (milliseconds) between polls when in Pull Supplier - Push
Shuts down the server.
You can change the traceLevel while the application is running.
Send the server SIGUSR1 to bump its traceLevel up by 5. The
traceLevel is wrapped at 45, so you can always get it back to
where it started by repeatedly sending SIGUSR1.
Example: kill -USR1 ‘cat /var/run/omniEvents.pid‘
Sets the directory where data files are kept by default. An
alternative to the -l option.
The location of the omniORB configuration file.
Copyright © 2003-2005 Alex Tingle, 1999 Paul Nader.
This is free software; see the source for copying conditions. There is
NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR