[jboss-jira] [JBoss JIRA] (WFLY-11471) Add expressions to enable statistics

Jeff Mesnil created WFLY-11471: ---------------------------------- Summary: Add expressions to enable statistics Key: WFLY-11471 URL: https://issues.jboss.org/browse/WFLY-11471 Project: WildFly Issue Type: Enhancement Components: JCA, JMS, MP Metrics, Transactions, Web (Undertow) Affects Versions: 15.0.0.Final Reporter: Jeff Mesnil Assignee: Jeff Mesnil With the microprofile-metrics-smallrye extension, we can expose WildFly metrics to monitoring tools such as Promotheus. However, some of these metrics can have performance/memory impact and are not computed by default. They are control by attributes named `statistics-enabled` on the WildFly resources those runtime provides these metrics. If an user wants to collect such metrics, he has to set these `statistics-enabled` attributes to `true` for all resources. In order to improve user experience, our shipped standalone configuration could use expressions so that the user would have to set a single system property to enable these metrics. The format would be: {code} statistics-enabled=${wildfly.statistics-enabled:${wildfly.<xxx>.statistics-enabled:false}} {code} where <xxx> are names of the resources that exposes the metrics: undertow, transactions, datasources, messaging-activemq The nested expressions allows to have a global system property to enable *all* statistics: (wildfly.statistics-enabled) and specific system properties to enable/disable only some metrics (e.g. wildfly.transactions.statistics-enabled). Use case: * start the standalone profile as usual * ./bin/standalone.sh * => all statistics-enabled attributes are resolved to false * start the standalone profile with all statistics: * ./bin/standalone.sh -Dwildfly.statistics-enabled=true * => all statistics-enabled attributes are resolved to true * start the standalone profile with only undertow statistics: * ./bin/standalone.sh -Dwildfly.undertow.statistics-enabled=true * => all statistics-enabled attributes are resolved to true * start the standalone profile with only undertow statistics: * ./bin/standalone.sh -Dwildfly.undertow.statistics-enabled=true * => only undertow statistics are enabled * start the standalone profile with all but undertow statistics: * ./bin/standalone.sh -Dwildfly.undertow.statistics-enabled=false -Dwildfly.statistics-enabled=true * => All but undertow statistics are enabled -- This message was sent by Atlassian Jira (v7.12.1#712002)