![]() A formula can be particularly useful here, especially if you want to make the Session variable value dynamic in order to, for example, increment a counter or a date each time the report is reloaded. This element lets you enter a list of Session variable names and their values.Īs shown above, the values can be numbers, strings, tokens, or even formulae. Next, a Session Parameters child element is added. The Set First Time Only attribute, if set to True, causes the Session variables to be set the first time the definition is processed but does not reset them if the report is reloaded during the current user session. The Condition attribute lets you specify a formula which has to evaluate to True for the Session variables to be set. ![]() Its optional attributes are also shown and can be very useful. Setting Session variables in a Report definition is very easy:įirst, the Set Session Variables element is added to the definition, as shown above. Some values, including tokens set with the two Set Session elements mentioned earlier,Īren't processed until later so tokens should not be used with Repeat Elements. The Repeat Elements element is one of the very first things processed when a Our recommendation is that you use Session variables for small It's possible to put huge amounts of data into Session variables but it's poor practice to do so, because that will negatively affect server performance. of any size, and that opens the door to potential abuse. Session variables are of the variant data type, meaning they can be anything - strings, numbers, arrays, etc. For more information, see Use Logi SecureKey Authentication. ThisĮnsures that Session variables established during a previous user's sessionĪre not re-used for the next user's session. When using Logi SecureKey authentication, the Security element in _Settings includes a Restart Session attribute that can be set to clear out all Session variables right before an attempted login. For more information, see Manage Session Timeout. The Session Timeout element, introduced in v11.4.046, can be used to manage the user session lifetime. Session variables, of course, only exist as long as the user session lasts. They can also be set by other, non-Logi applications and used in an integrated Logi application (see the Java Session Copying section for special considerations that apply to Java applications). Logi application Session variables can be set in both ReportĪnd Process definitions using the Set Session Variables and Procedure.Set Session Vars elements, respectively. Session variables provide a useful way to store values that can be used anywhere in a Logi application and provide the best approximation of a real programming variable you'll find in stateless web applications. This topic discusses the elements and techniques associated with Session variables in a Logi application. They're very useful in Logi applications for retaining and passing data. # app.Session variables are values that are global in scope and persistent for the life of a user session. It uses more complex R function - these are excerpts and are here to imitate all aspects of my Shiny app. To show my intentions I've prepared the below code - of course it doesn't work, but I hope that is enough to show what I am looking for. I've been looking for the recommended, elegant way of having possibility to use session variable which is available in every function used within Shiny app.
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