CosEventChannelAdmin(3erl) Erlang Module Definition CosEventChannelAdmin(3erl)NAME
CosEventChannelAdmin - The CosEventChannelAdmin defines a set if event service interfaces that enables decoupled asynchronous communica-
tion between objects and implements generic (untyped) version of the OMG COSS standard event service.
DESCRIPTION
The event service defines two roles for objects: the supplier role and the consumer role. Suppliers supply event data to the event channel
and consumers receive event data from the channel. Suppliers do not need to know the identity of the consumers, and vice versa. Consumers
and suppliers are connected to the event channel via proxies, which are managed by ConsumerAdmin and SupplierAdmin objects.
There are four general models of communication. These are:
* The canonical push model. It allows the suppliers of events to initiate the transfer of event data to consumers. Event channels play
the role of Notifier . Active suppliers use event channel to push data to passive consumers registered with the event channel.
* The canonical pull model. It allows consumers to request events from suppliers. Event channels play the role of Procure since they pro-
cure events on behalf of consumers. Active consumers can explicitly pull data from passive suppliers via the event channels.
* The hybrid push/pull model. It allows consumers request events queued at a channel by suppliers. Event channels play the role of Queue
. Active consumers explicitly pull data deposited by active suppliers via the event channels.
* The hybrid pull/push model. It allows the channel to pull events from suppliers and push them to consumers. Event channels play the
role of Intelligent agent . Active event channels can pull data from passive suppliers to push it to passive consumers.
To get access to all definitions, e.g., exceptions, include necessary hrl files by using:
-include_lib("cosEvent/include/*.hrl").
There are seven different interfaces supported in the service:
* ProxyPushConsumer
* ProxyPullSupplier
* ProxyPullConsumer
* ProxyPushSupplier
* ConsumerAdmin
* SupplierAdmin
* EventChannel
Ericsson AB cosEvent 2.1.10 CosEventChannelAdmin(3erl)
Check Out this Related Man Page
RDMA_CREATE_EVENT_CHANNEL(3) Librdmacm Programmer's Manual RDMA_CREATE_EVENT_CHANNEL(3)NAME
rdma_create_event_channel - Open a channel used to report communication events.
SYNOPSIS
#include <rdma/rdma_cma.h>
struct rdma_event_channel * rdma_create_event_channel (void);
ARGUMENTS
void no arguments
DESCRIPTION
Asynchronous events are reported to users through event channels.
RETURN VALUE
Returns a pointer to the created event channel, or NULL if the request fails. On failure, errno will be set to indicate the failure rea-
son.
NOTES
Event channels are used to direct all events on an rdma_cm_id. For many clients, a single event channel may be sufficient, however, when
managing a large number of connections or cm_id's, users may find it useful to direct events for different cm_id's to different channels
for processing.
All created event channels must be destroyed by calling rdma_destroy_event_channel. Users should call rdma_get_cm_event to retrieve events
on an event channel.
Each event channel is mapped to a file descriptor. The associated file descriptor can be used and manipulated like any other fd to change
its behavior. Users may make the fd non-blocking, poll or select the fd, etc.
SEE ALSO rdma_cm(7), rdma_get_cm_event(3), rdma_destroy_event_channel(3)librdmacm 2007-05-15 RDMA_CREATE_EVENT_CHANNEL(3)
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