2022.2

Table Of Contents
Messenger plugin preferences
Apart from enabling communication between the various parts of PReS Workflow, the PReS Workflow
Messenger also manages local instances of the PReS Workflow Alambic.
The Messenger service uses the SSL 2.3 protocol.
Preferences
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PReS Alambic options group
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Let me set up how many instances to run: Select this option if you want to limit the num-
ber of instances of the Alambic that PReS Workflow can run. Then enter the number of
instances, a value ranging from 1 to 32, in the box below. When this option is not selected,
PReS Workflow starts a minimum of three instances and a maximum of eight, based on the
number of CPUs available on the server. Note that this does affects self-replicating pro-
cesses. Self-replicating processes will create threads in PReS Workflow service, while
Alambic threads are under the PReS Messenger service.
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Close inactive instances after: If you want the PReS Workflow Messenger to close inact-
ive instances of the Alambic after a given number of minutes, enter a value in this box.
Enter a value of ”0 if you do not want the Messenger to terminate idle instances of the
Alambic.
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Logging options group
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Delete log files after: Enter the number of days after which to delete the Messenger ser-
vice logs. Each log covers a 24-hour period and is kept in the Log folder, which is located in
the installation folder.
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Verbose log: Select this option if you want the log to contain a maximum amount of inform-
ation.
HTTP Server Input plugin preferences 1
The first set of HTTP Server Input plugin preferences controls the server protocol aspects of the
PReS Workflow HTTP Server Input tasks. This is where you enable and configure secure com-
munication for the HTTP Server.
To open the Preferences dialog, click the PReS Workflow button and then the Preferences button, or
use the key combination Ctrl+Alt+P. The HTTP Server Input 1 plugin preferences can be found under
Plug-in.
Preferences
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Port: Select the port to use. The default port is 8080, the official HTTP alternate port, so as not to
interfere with the standard HTTP port (80). To block any regular HTTP traffic (for example if only
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