BAEL-41: Added failover appender.

logging/log4j2/src/test/java/com/baeldung/logging/log4j2/tests/FailoverSyslogConsoleAppenderTest.java

@@ -0,0 +1,28 @@
+package com.baeldung.logging.log4j2.tests;
+
+import org.apache.logging.log4j.Logger;
+import org.apache.logging.log4j.junit.LoggerContextRule;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+@RunWith(JUnit4.class)
+public class FailoverSyslogConsoleAppenderTest {
+
+    @Rule
+    public LoggerContextRule contextRule = 
+      new LoggerContextRule("log4j2-failover-syslog-console-appender_pattern-layout.xml");
+
+    @Test
+    public void givenLoggerWithFailoverConfig_shouldLog() throws Exception {
+        Logger logger = contextRule.getLogger(getClass().getSimpleName());
+        logger.trace("This is a syslog message at TRACE level.");
+        logger.debug("This is a syslog message at DEBUG level.");
+        logger.info("This is a syslog message at INFO level. This is the minimum visible level.");
+        logger.warn("This is a syslog message at WARN level.");
+        Exception e = new RuntimeException("This is only a test!");
+        logger.error("This is a syslog message at ERROR level.", e);
+        logger.fatal("This is a syslog message at FATAL level.");
+    }
+}

logging/log4j2/src/test/resources/log4j2-failover-syslog-console-appender_pattern-layout.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration status="WARN" xmlns:xi="http://www.w3.org/2001/XInclude">
+    <Appenders>
+
+        <xi:include href="log4j2-includes/console-appender_pattern-layout_colored.xml"/>
+
+        <Syslog name="Syslog" host="localhost" port="514" protocol="TCP" ignoreExceptions="false"/>
+
+        <Failover name="Failover" primary="Syslog">
+            <Failovers>
+                <AppenderRef ref="Console"/>
+            </Failovers>
+        </Failover>
+    </Appenders>
+    <Loggers>
+        <Root level="debug">
+            <AppenderRef ref="Failover"/>
+        </Root>
+    </Loggers>
+</Configuration>