| 1 | /* |
| 2 | * SPDX-License-Identifier: MIT |
| 3 | * |
| 4 | * Copyright (C) 2022 EfficiOS Inc. |
| 5 | */ |
| 6 | |
| 7 | import org.apache.logging.log4j.LogManager; |
| 8 | import org.apache.logging.log4j.Logger; |
| 9 | |
| 10 | /** |
| 11 | * Example application using the LTTng-UST Java log4j agent. |
| 12 | * |
| 13 | * <p> |
| 14 | * To obtain LTTng trace events, you should run the following sequence of |
| 15 | * commands: |
| 16 | * </p> |
| 17 | * |
| 18 | * <ul> |
| 19 | * <li>$ lttng create</li> |
| 20 | * <li>$ lttng enable-event -l -a</li> |
| 21 | * <li>$ lttng start</li> |
| 22 | * <li>(run this program)</li> |
| 23 | * <li>$ lttng stop</li> |
| 24 | * <li>$ lttng view</li> |
| 25 | * <li>$ lttng destroy</li> |
| 26 | * </ul> |
| 27 | * |
| 28 | */ |
| 29 | public class HelloLog4j2 { |
| 30 | |
| 31 | private static final Logger logger = LogManager.getLogger(HelloLog4j2.class); |
| 32 | |
| 33 | /** |
| 34 | * Application start |
| 35 | * |
| 36 | * @param args Command-line arguments |
| 37 | */ |
| 38 | public static void main(String args[]) { |
| 39 | |
| 40 | /* Trigger some tracing events using the Log4j Logger created before. */ |
| 41 | logger.info("Basic config: Hello World, the answer is " + 42); |
| 42 | logger.info("Basic config: Another info event"); |
| 43 | logger.error("Basic config: An error event"); |
| 44 | } |
| 45 | } |