X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=doc%2Fexamples%2Fjava-log4j2-ctx%2FHelloLog4j2Ctx.java;fp=doc%2Fexamples%2Fjava-log4j2-ctx%2FHelloLog4j2Ctx.java;h=b953223106ac0a0143bc2468ee73749f761caa6b;hb=464c475658ae29039b3b9e769b5b02195688a94a;hp=0000000000000000000000000000000000000000;hpb=08c1dfc43e014a99cd47202f6b370f8afa33e4c8;p=lttng-ust.git

diff --git a/doc/examples/java-log4j2-ctx/HelloLog4j2Ctx.java b/doc/examples/java-log4j2-ctx/HelloLog4j2Ctx.java
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+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * Copyright (C) 2022 EfficiOS Inc.
+ */
+
+import java.net.URI;
+import java.util.ArrayList;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.apache.logging.log4j.core.LoggerContext;
+
+/**
+ * Example application using the LTTng-UST Java log4j agent.
+ *
+ * <p>
+ * To obtain LTTng trace events, you should run the following sequence of
+ * commands:
+ * </p>
+ *
+ * <ul>
+ * <li>$ lttng create</li>
+ * <li>$ lttng enable-event -l -a</li>
+ * <li>$ lttng start</li>
+ * <li>(run this program)</li>
+ * <li>$ lttng stop</li>
+ * <li>$ lttng view</li>
+ * <li>$ lttng destroy</li>
+ * </ul>
+ *
+ */
+public class HelloLog4j2Ctx {
+
+	/**
+	 * Application start
+	 *
+	 * @param args Command-line arguments
+	 */
+	public static void main(String args[]) {
+
+		URI configFileUri1 = URI.create("./log4j2.ctx1.xml");
+		URI configFileUri2 = URI.create("./log4j2.ctx2.xml");
+
+		LoggerContext loggerContext1 = (LoggerContext) LogManager.getContext(ClassLoader.getSystemClassLoader(), false,
+				configFileUri1);
+		LoggerContext loggerContext2 = (LoggerContext) LogManager.getContext(ClassLoader.getSystemClassLoader(), false,
+				configFileUri2);
+
+		/* Loggers in different contexts with the same name. */
+		Logger logger1ctx1 = loggerContext1.getLogger(HelloLog4j2Ctx.class);
+		Logger logger1ctx2 = loggerContext2.getLogger(HelloLog4j2Ctx.class);
+
+		Logger logger2ctx1 = loggerContext1.getLogger("Logger2");
+		Logger logger3ctx2 = loggerContext2.getLogger("Logger3");
+
+		ArrayList<Logger> loggers = new ArrayList<Logger>();
+
+		loggers.add(logger1ctx1);
+		loggers.add(logger1ctx2);
+		loggers.add(logger2ctx1);
+		loggers.add(logger3ctx2);
+
+		for (Logger logger : loggers) {
+			/* Trigger some tracing events using the Log4j Logger created before. */
+			logger.info("Context config: Hello World, the answer is " + 42);
+			logger.info("Context config: Another info event");
+			logger.error("Context config: An error event");
+		}
+	}
+}