[jboss-jira] [JBoss JIRA] (JGRP-2337) DiagnosticsHandler without reflection

[ https://issues.jboss.org/browse/JGRP-2337?page=com.atlassian.jira.plugin.... ] Bela Ban updated JGRP-2337: --------------------------- Description: Probe.sh sends commands to cluster nodes, and they are handled by each node's DiagnosticsHandler. {{"op"}} and {{"jmx"}} commands are handled via reflection. However, reflection is not allowed by the GraalVM running in native mode, unless all attributes and methods of all protocols would be listed in a JSON file. This is apparently very costly as the native image builder creates a transitive closure over all classes whose methods and/or fields are listed in the JSON file, and thus includes too many classes in the native image. Investigate creating a {{ProbeHandler}} for {{"jmx""}} and {{"op"}} commands, which does not use reflection. 2 alternatives come to mind: * Offline creation and compilation: point to a list of protocols for which code is generated (an alternative ProbeHandler class). This class is then instantiated and set in the channel at runtime by the application * Point to a running stack. The code uses reflection (obviously this needs to run in non-native mode) to generate the native {{ProbeHandler}} from the list of protocols running in the current stack. This code can then be compiled and used in native image generation. was: Probe.sh sends commands to cluster nodes, and they are handled by each node's DiagnosticsHandler. {{"op"}} and {{"jmx"}} commands are handled via reflection. However, reflection is not allowed by the GraalVM running in native mode, unless all attributes and methods of all protocols would be listed in a JSON file. This is apparently very costly as the native image builder creates a transitive closure over all classes whose methods and/or fields are listed in the JSON file, and thus includes too many classes in the native image. Investigate creating a {{ProbeHandler}} for {{"jmx""}} and {{"op"}} commands, which does not use reflection. Offline creation and compilation: point to a list of protocols for which code is generated (an alternative ProbeHandler class). This class is then instantiated and set in the channel at runtime by the application -- This message was sent by Atlassian Jira (v7.12.1#712002)