[WICKET-6963] Use singletons for PanelMarkupSourcingStrategy

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 9.8.0
• Fix Version/s: 10.0.0-M1, 9.9.0, 9.9.1, 9.10.0
• Component/s: wicket-core
• Assignee: Thomas Heigl
• Reporter: Thomas Heigl
• Created: 21/Mar/22 17:21
• Updated: 28/Apr/22 09:08
• Resolved: 23/Mar/22 17:13

Description

My latest heapdump contained millions of instances of PanelMarkupSourcingStrategy:

This class is completely stateless and only takes a single boolean constructor parameter. We should replace current instances by a factory method and two singletons.

Issue Links

• is duplicated by: WICKET-6962 Use singletons for PanelMarkupSourcingStrategy
• links to: GitHub Pull Request #503
• links to: GitHub Pull Request #517