Wildlfy CLI debugging in embedded mode

Question

When creating an embedded server via

EmbeddedProcessFactory.createStandaloneServer

there is no possibility to enable stdout echoing - the command --std-out=echo arg is not allowed here.

Now calling CLI commands on this server discards all the output and if any error message is not meaningful, how to debug this?

Answer 1

If you're using the WildFly embedded server directly, you can control logging via any log manager. By default this will use the JBoss Log Manager. You'd just need to make sure a logging.properties file is on your class path. Here is an example configuration for the JBoss Log Manager.

# Additional logger names to configure (root logger is always configured)
loggers=

# Root logger level
logger.level=INFO

# Root logger handlers
logger.handlers=CONSOLE

# Console handler configuration
handler.CONSOLE=org.jboss.logmanager.handlers.ConsoleHandler
handler.CONSOLE.properties=autoFlush
handler.CONSOLE.autoFlush=true
handler.CONSOLE.formatter=PATTERN

# Formatter pattern configuration
formatter.PATTERN=org.jboss.logmanager.formatters.PatternFormatter
formatter.PATTERN.properties=pattern
formatter.PATTERN.pattern=%K{level}%d{HH\:mm\:ss,SSS} %-5p [%c] (%t) %s%e%n

You could use a different log manager as well like logback or log4j2. With the Configuration.Builder you'd set the logging hint. Here is an example using log4j2.

final StandaloneServer server = EmbeddedProcessFactory.createStandaloneServer(
        Configuration.Builder.of(Path.of("/opt/wildfly-27.0.1.Final"))
                .setLoggerHint(Configuration.LoggerHint.LOG4J2)
                .build());
try {
    server.start();
    try (ModelControllerClient client = ModelControllerClient.Factory.create("localhost", 9990)) {
        final ModelNode op = Operations.createOperation("read-resource");
        op.get("attributes-only").set(true);
        System.out.println(client.execute(op));
    }
} finally {
    server.stop();
}