cosEventApp (3erl)

To get access to the record definitions for the structures use:

-include_lib("cosEvent/include/*.hrl").

This module contains the functions for starting and stopping the application.

install() -> Return

Types:

Return = ok | {'EXCEPTION', E} | {'EXIT', R}

This operation installs the cosEvent application.

uninstall() -> Return

Types:

Return = ok | {'EXCEPTION', E} | {'EXIT', R}

This operation uninstalls the cosEvent application.

start() -> Return

Types:

Return = ok | {error, Reason}

This operation starts the cosEvent application.

stop() -> Return

Types:

Return = ok | {error, Reason}

This operation stops the cosEvent application.

start_channel() -> Channel

Types:

Channel = #objref

This operation creates a new instance of a Event Channel using the default settings.

start_channel(Options) -> Channel

Types:

Options = [Option]

Option = {pull_interval, Seconds} | {typecheck, Boolean} | {maxEvents, Integer} | {blocking, Boolean}

Channel = #objref

This operation creates a new instance of a Event Channel

*

{pull_interval, Seconds} - determine how often Proxy Pull Consumers will check for new events with the client application. The default value is 20 seconds.

*

{typecheck, Boolean} - if this option is set to true the proxies will check if the supplied client object is of correct type. The default value is false.

*

{maxEvents, Integer} - this option determine how many events the ProxyPullSuppliers will store before discarding events. If the limit is reached events will be discarded in any order. The default value is 300.

*

{blocking, Boolean} - this option determine the behavior of the channel when handling events internally. If set to true the risk of a single event supplier floods the system is reduced, but the performance may also be reduced. The default value is true.

start_channel_link() -> Channel

Types:

Channel = #objref

This operation creates a new instance of a Event Channel, which is linked to the invoking process, using the default settings.

start_channel_link(Options) -> Channel

Types:

Options = [Option]

Option = {pull_interval, Seconds} | {typecheck, Boolean} | {maxEvents, Integer} | {blocking, Boolean}

Channel = #objref

This operation creates a new instance of a Event Channel, which is linked to the invoking process, with settings defined by the given options. Allowed options are the same as for cosEventApp:start_channel/1.

stop_channel(Channel) -> Reply

Types:

Channel = #objref

Reply = ok | {'EXCEPTION', E}

This operation stop the target event channel.