Description Laurent Redor 2020-08-21 12:28:55 EDT

In a collaborative environment, when the data is host on a server, the connection with the server can be lost. Sirius is not ready to handle this context. If Sirius tries to access to data, for example with an async refresh of the UI that needs information from data to be refreshed, a org.eclipse.net4j.util.lifecycle.LifecycleException is thrown with the message "Not active: CDOTransactionImpl". This kind of errors is showed to the end-user instead of silently catch it. Indeed, in this situation, the UI should be refreshed with "blank data" instead of displaying an "incomprehensible" popup to the end-user.

Several cases, see list [1] to [4] (not exhaustive), have been already fixed in the past but without a common way to retrieve them. Generally, just a "try catch IllegalStateException" has been added. Indeed, LifecycleException is not known from Sirius and IllegalStateException is the superclass of LifecycleException.

The goal of this issue is to propose an helper to detect this kind of specific Exception, not all IllegalStateException, and then use it when it is necessary.

[1] https://bugs.eclipse.org/bugs/show_bug.cgi?id=522749
[2] https://bugs.eclipse.org/bugs/show_bug.cgi?id=539924
[3] https://bugs.eclipse.org/bugs/show_bug.cgi?id=551053
[4] https://bugs.eclipse.org/bugs/show_bug.cgi?id=552679