RenderingExecutor regression: NPE when task is cancelled
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Key: GEOT-3802
URL: https://jira.codehaus.org/browse/GEOT-3802
Project: GeoTools
Issue Type: Bug
Components: swing
Reporter: Michael Bedward
Assignee: Michael Bedward
Fix For: 8.0-M2
Until recently, the RenderingTask class included a cancel method which stopped
the renderer gracefully. I thought this was redundant and changed
DefaultRenderingExecutor to call cancel on the Future for the task. However,
this can result in the renderer losing its data and throwing an NPE.
One fix would be to add a reference to the renderer to the nested TaskInfo
class and call renderer.stopRendering rather than cancelling the future.
Another option is to reinstate the cancel method in the RenderingTask class. Of
the two, the second seems preferable because it worked before and could be used
by other RenderingExecutor implementations.
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