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endurox:v7.5.x:manuals:tpevsrv.8
Name
tpevsrv — Enduro/X Local Event Broker server.
DESCRIPTION
This is special ATMI server which manages local event brokerage. In bridged mode it also ensure that events are delivers to other nodes too i.e. to other cluster nodes local event brokers, which dispatches events locally to subscribed servers. Following special services are advertised by tpevsrv:
- @TPEVSUBS - Service for doing local subscription to event receive by server.
- @TPEVUNSUBS - Service for unsubscribing from event (by server).
- @TPEVPOST - Do global posting. This is called actually by tppost(). It dispatches events to local servers and does bridge calls.
- @TPEVDOPOST - This is local only posting. Used by bridges when they receive remote event postings.
Subscriptions to events are supported by per ATMI server instance. Only one instance of server should be present in local Enduro/X instance.
Event server supports dispatch-threads multi-threading model. By default it uses single thread, but ndrxconfig.xml(5) servers settings such as mindispatchtreads and maxdispatchtreads may be used to add some performance boost for multi-threading.
The typical configuration looks like this (with 5 dispatching threads):
<server name="tpevsrv">
<srvid>10</srvid>
<mindispatchthreads>5</mindispatchthreads>
<maxdispatchthreads>5</maxdispatchthreads>
<sysopt>-e ${NDRX_HOME}/log/tpevsrv.log -r</sysopt>
</server>Note that any write operations such as sub-scribe or un-subscribe are executed with exclusive write lock. Postings are executed with shared read lock.