# Get Perspective Session Page Info from PageIds

**URL:** <https://forum.inductiveautomation.com/t/get-perspective-session-page-info-from-pageids/74585>\
**Category:** Ignition\
**Tags:** perspective, scripting, ignition81\
**Created:** [June 5, 2023, 6:40pm UTC](https://forum.inductiveautomation.com/t/get-perspective-session-page-info-from-pageids/74585 "2023-06-05T18:40:28Z")\
**Posts on this page:** 10\
**Page:** 1

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**Author:** ![dustin.cooper](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/dustin.cooper/32/29963_2.png) [@dustin.cooper](https://forum.inductiveautomation.com/u/dustin.cooper)\
**Post date:** [June 5, 2023, 6:40pm UTC](https://forum.inductiveautomation.com/t/get-perspective-session-page-info-from-pageids/74585/1 "2023-06-05T18:40:28Z")

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Hello,

I'd like to drill down into the page details, in a gateway script scope, for the perspective sessions returned from `system.perspective.getSessionInfo` similar to the "Details" returned when you click on the following button in the **Status -\> Connections -\> Perspective Sessions** gateway web-page  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/5/c/5c2b178c150e5fecf2338be9936d4f44e8bda016.png)  
Specifically, I need to be able to parse the list of _View Instances_ that are shown in the details page when you click on the above pictured button to tell if a certain view is open in each session.

I've looked at [this thread](https://forum.inductiveautomation.com/t/how-is-the-perspective-sessions-status-page-info-found/73921) under module development, but I need to get at the same info in a gateway script without building a module, and the `com.inductiveautomation.perspective.gateway.session` module fails to import for me in a gateway scope (8.1.22) with

```auto
com.inductiveautomation.ignition.common.GenericTransferrableException: ImportError: No module named perspective

```

What am I missing, or is there an easier way to drill down to this info in a python script?

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<div class="post-metadata">

**Author:** ![dustin.cooper](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/dustin.cooper/32/29963_2.png) [@dustin.cooper](https://forum.inductiveautomation.com/u/dustin.cooper)\
**Post date:** [June 5, 2023, 8:36pm UTC](https://forum.inductiveautomation.com/t/get-perspective-session-page-info-from-pageids/74585/2 "2023-06-05T20:36:44Z")

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Looks like I am essentially asking the same question as [this thread](https://forum.inductiveautomation.com/t/get-perspective-view-path-s-from-session-pageids/62988). @nminchin did you ever find a solution on this? I haven't figured out how to get the [PerspectiveSessionMonitor](https://files.inductiveautomation.com/sdk/javadoc/ignition81/8.1.15/com/inductiveautomation/perspective/gateway/session/PerspectiveSessionMonitor.html#getClientSessionsForProject(java.lang.String)) object in a gateway script, either in a timer script or gateway message handler...

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**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\
**Post date:** [June 5, 2023, 9:24pm UTC](https://forum.inductiveautomation.com/t/get-perspective-session-page-info-from-pageids/74585/3 "2023-06-05T21:24:31Z")

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You won't be able to do this easily, because the gateway has per-module classloaders and scripts aren't loaded in those classloaders. You could potentially do it from a GatewayContext -\> ModuleManager -\> findClass -\> hope there's a static accessor on the class.

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<div class="post-metadata">

**Author:** ![dustin.cooper](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/dustin.cooper/32/29963_2.png) [@dustin.cooper](https://forum.inductiveautomation.com/u/dustin.cooper)\
**Post date:** [June 5, 2023, 9:31pm UTC](https://forum.inductiveautomation.com/t/get-perspective-session-page-info-from-pageids/74585/4 "2023-06-05T21:31:39Z")

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Do you mean this as a possible path for accessing the `com.inductiveautomation.perspective` namespace?

I looked at the [SDK for getModuleManager](https://files.inductiveautomation.com/sdk/javadoc/ignition81/8.1.15/com/inductiveautomation/ignition/gateway/model/ModuleManager.html) and the gateway context and don't see any methods like "findClass"...

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<div class="post-metadata">

**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [June 5, 2023, 9:51pm UTC](https://forum.inductiveautomation.com/t/get-perspective-session-page-info-from-pageids/74585/5 "2023-06-05T21:51:55Z")

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Basically, you use the gateway context's module manager to "get" the module, which will give you the module's hook class instance. You then use that instance's class to get its classloader, then ask **that** classloader to lookup the class you are after (by canonical string name). Assign that to a variable in your script as if it was an import and carry on.

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<div class="post-metadata">

**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\
**Post date:** [June 5, 2023, 10:44pm UTC](https://forum.inductiveautomation.com/t/get-perspective-session-page-info-from-pageids/74585/6 "2023-06-05T22:44:35Z")

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`resolveClass`, not `findClass`. But yeah, what Phil said:  
[https://files.inductiveautomation.com/sdk/javadoc/ignition81/8.1.15/com/inductiveautomation/ignition/gateway/model/ModuleManager.html#resolveClass(java.lang.String)](https://files.inductiveautomation.com/sdk/javadoc/ignition81/8.1.15/com/inductiveautomation/ignition/gateway/model/ModuleManager.html#resolveClass(java.lang.String))

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<div class="post-metadata">

**Author:** ![dustin.cooper](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/dustin.cooper/32/29963_2.png) [@dustin.cooper](https://forum.inductiveautomation.com/u/dustin.cooper)\
**Post date:** [June 5, 2023, 10:53pm UTC](https://forum.inductiveautomation.com/t/get-perspective-session-page-info-from-pageids/74585/7 "2023-06-05T22:53:55Z")

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Yep, was just about to reply that `context.getModuleManager().resolveClass('com.inductiveautomation.perspective.gateway.session.PerspectiveSessionMonitor')` ~~appears to do what I need, or at least gets me closer to what the gateway status page is doing...~~

EDIT: See reply below, this method of resolving the class results in an unusable (null) instance of `PerspectiveSessionMonitor`

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<div class="post-metadata">

**Author:** ![dustin.cooper](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/dustin.cooper/32/29963_2.png) [@dustin.cooper](https://forum.inductiveautomation.com/u/dustin.cooper)\
**Post date:** [June 5, 2023, 11:53pm UTC](https://forum.inductiveautomation.com/t/get-perspective-session-page-info-from-pageids/74585/8 "2023-06-05T23:53:25Z")

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Haven't gotten all the way down to the info I need, but I did manage to drill down to the actual `PerspectiveSessionMonitor` instance that matches what is running on the gateway by using the module manager `resolveClass` method to get the `PerspectiveContext` class interface, and then instantiate that with the gateway context to get the actual perspective context. From here it is a simple matter of calling the `getSessionMonitor` method to get the "live" session data.

```auto
from com.inductiveautomation.ignition.gateway import IgnitionGateway

context = IgnitionGateway.get()
mod_mgr = context.getModuleManager()
# the below uses the gateway context module manager to function essentially as an import statement
persp_ctx_class = mod_mgr.resolveClass('com.inductiveautomation.perspective.gateway.api.PerspectiveContext')
# instantiate the PerspectiveContext using the gateway context
persp_ctx = persp_ctx_class.get(context)
# get the PerspectiveSessionMonitor object running in gateway context
psm = persp_ctx.getSessionMonitor()
all_sessions_info = psm.getSessionInfos()

```

I was close with the `resolveClass('com.inductiveautomation.perspective.gateway.session.PerspectiveSessionMonitor')` but ultimately that route gives you an empty session monitor that is out of the gateway context.

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<div class="post-metadata">

**Author:** ![dustin.cooper](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/dustin.cooper/32/29963_2.png) [@dustin.cooper](https://forum.inductiveautomation.com/u/dustin.cooper)\
**Post date:** [June 6, 2023, 9:53pm UTC](https://forum.inductiveautomation.com/t/get-perspective-session-page-info-from-pageids/74585/9 "2023-06-06T21:53:46Z")

</div>

Just for completeness/posterity, here is a sample of full code that does what I set out to do, ie browse active sessions for a given project, determine if a given view is open on those sessions, and then grab the session id and a couple of session custom props from those sessions and build it out into a map to write to a JSON tag.

> **Session Monitor Browse Code**
>
> ```auto
> from com.inductiveautomation.ignition.gateway import IgnitionGateway
> import json
> 
> project_name = sytem.util.getProjectName()
> target_view_path = 'path/to/desired/view'
> 
> context = IgnitionGateway.get()
> mod_mgr = context.getModuleManager()
> # need to get "com.inductiveautomation.perspective.common.api.PropertyType" from module manager to
> # get the "props" and "custom" enums for fetching the session props and the custom props
> prop_type_class = mod_mgr.resolveClass('com.inductiveautomation.perspective.common.api.PropertyType')
> props_enum = prop_type_class.valueOf('props')
> custom_enum = prop_type_class.valueOf('custom')
> # the below uses the gateway context module manager to function essentially as an import statement
> persp_ctx_class = mod_mgr.resolveClass('com.inductiveautomation.perspective.gateway.api.PerspectiveContext')
> # instantiate the PerspectiveContext using the gateway context
> persp_ctx = persp_ctx_class.get(context)
> # get the PerspectiveSessionMonitor object running in gateway context
> psm = persp_ctx.getSessionMonitor()
> # grab <InternalSession> object list for the target project
> int_sessions = psm.getClientSessionsForProject(project_name)
> active_sessions = {}
> # loop over internal sessions to build a map of active sessions with the target view open
> for i, sess in enumerate(int_sessions):
> # loop over the open pages for each session and get the id for each
> for page in sess.getPages():
> # this returns the page id that matches the gateway Status -> Connections -> Perspective Sessions -> Session detail page
> page_id = page.getId()
> views = page.getViews()
> # iterate over the views to see if any of the ids match the target view path
> view_id, view = next(((str(view.getId()), view) for view in views if target_view_path in str(view.getId())), (None, None))
> if view_id and view:
> # if view_id is found, that means this session has the target view open
> # grab the session object from the view, we will use this to grab the session id, and custom props
> session = view.getSession()
> # grab session props and custom props using "getPropertyTreeOf" method of SessionScriptWrapper.SafetyWrapper
> session_props = session.getPropertyTreeOf(props_enum)
> session_custom = session.getPropertyTreeOf(custom_enum)
> session_id = session_props.get('id')
> prop1 = session_custom.get('custom_prop_1_name', None)
> prop2 = session_custom.get('custom_prop_2_name', None)
> # build object to store for the active session
> active_sessions[session_id] = {
> 'custom_prop_1_name': prop1, 
> 'custom_prop_2_name': prop2
> }
> # convert the active sessions object to json and write to string memory tag
> active_sessions = json.dumps(active_sessions)
> system.tag.writeBlocking(['[default]path/to/active_sessions_tag'], [active_sessions])
> 
> ```

Thanks to @pturmel and @paul-griffith for getting me off the ground/out of the ditch on this. You guys rock!

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<div class="post-metadata">

**Author:** ![Alejandro\_Rosa](https://avatars.discourse-cdn.com/v4/letter/a/dec6dc/32.png) [@Alejandro\_Rosa](https://forum.inductiveautomation.com/u/Alejandro_Rosa)\
**Post date:** [March 27, 2024, 10:03am UTC](https://forum.inductiveautomation.com/t/get-perspective-session-page-info-from-pageids/74585/10 "2024-03-27T10:03:28Z")

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Hello guys! This post is really interesting to me but I cannot execute it. My question is where you execute this code? I try to execut it in the Gateway events and script conssole but always I have and error when I try to import the IgnitionGateway.

Thanks for your answer!