BAEL-41: Added including tests:

- added JDBC appender.

logging/log4j2/pom.xml

@@ -38,6 +38,18 @@
             <version>2.8.2</version>
         </dependency>
 
+        <!-- This is used by JDBC Appender. -->
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <version>1.4.192</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-dbcp2</artifactId>
+            <version>2.1.1</version>
+        </dependency>
+
         <!-- This is used for testing only. -->
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>

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

@@ -0,0 +1,52 @@
+package com.baeldung.logging.log4j2.tests;
+
+import com.baeldung.logging.log4j2.tests.jdbc.ConnectionFactory;
+import org.apache.logging.log4j.Logger;
+import org.apache.logging.log4j.junit.LoggerContextRule;
+import org.junit.BeforeClass;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+import java.sql.Connection;
+import java.sql.ResultSet;
+
+import static org.junit.Assert.assertTrue;
+
+@RunWith(JUnit4.class)
+public class JDBCAppenderTest {
+
+    @Rule
+    public LoggerContextRule contextRule = new LoggerContextRule("log4j2-jdbc-appender.xml");
+
+    @BeforeClass
+    public static void setup() throws Exception {
+        Connection connection = ConnectionFactory.getConnection();
+        connection.createStatement()
+          .execute("CREATE TABLE logs(" +
+            "when TIMESTAMP," +
+            "logger VARCHAR(255)," +
+            "level VARCHAR(255)," +
+            "message VARCHAR(4096)," +
+            "throwable TEXT)");
+        //connection.commit();
+    }
+
+    @Test
+    public void givenLoggerWithJdbcConfig_shouldLogToDataSource() throws Exception {
+        Logger logger = contextRule.getLogger(getClass().getSimpleName());
+        final int count = 88;
+        for (int i = 0; i < count; i++) {
+            logger.info("This is JDBC message #{} at INFO level.", count);
+        }
+        Connection connection = ConnectionFactory.getConnection();
+        ResultSet resultSet = connection.createStatement()
+          .executeQuery("SELECT COUNT(*) AS ROW_COUNT FROM logs");
+        int logCount = 0;
+        if (resultSet.next()) {
+            logCount = resultSet.getInt("ROW_COUNT");
+        }
+        assertTrue(logCount == count);
+    }
+}

logging/log4j2/src/test/java/com/baeldung/logging/log4j2/tests/jdbc/ConnectionFactory.java

@@ -0,0 +1,25 @@
+package com.baeldung.logging.log4j2.tests.jdbc;
+
+import org.apache.commons.dbcp2.BasicDataSource;
+import org.h2.Driver;
+
+import java.sql.Connection;
+import java.sql.SQLException;
+
+public class ConnectionFactory {
+    private interface Singleton {
+        ConnectionFactory INSTANCE = new ConnectionFactory();
+    }
+
+    private BasicDataSource dataSource;
+
+    private ConnectionFactory() {
+        dataSource = new BasicDataSource();
+        dataSource.setDriver(new Driver());
+        dataSource.setUrl("jdbc:h2:mem:db;DB_CLOSE_DELAY=-1");
+    }
+
+    public static Connection getConnection() throws SQLException {
+        return Singleton.INSTANCE.dataSource.getConnection();
+    }
+}

logging/log4j2/src/test/resources/log4j2-async-file-appender_json-layout.xml

@@ -4,13 +4,13 @@
         <File name="JSONLogfile" fileName="target/logfile.json">
             <JSONLayout compact="true" eventEol="true"/>
         </File>
-        <Async name="Async">
+        <Async name="AsyncAppender" bufferSize="80">
             <AppenderRef ref="JSONLogfile"/>
         </Async>
     </Appenders>
     <Loggers>
-        <Root level="trace">
+        <Root level="INFO">
-            <AppenderRef ref="Async"/>
+            <AppenderRef ref="AsyncAppender"/>
         </Root>
     </Loggers>
 </Configuration>

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

@@ -4,8 +4,8 @@
         <xi:include href="log4j2-includes/console-appender_pattern-layout_colored.xml"/>
     </Appenders>
     <Loggers>
-        <Root level="trace">
+        <Root level="TRACE">
-            <AppenderRef ref="Console"/>
+            <AppenderRef ref="ConsoleAppender"/>
         </Root>
     </Loggers>
 </Configuration>

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

@@ -6,15 +6,15 @@
 
         <Syslog name="Syslog" host="localhost" port="514" protocol="TCP" ignoreExceptions="false"/>
 
-        <Failover name="Failover" primary="Syslog">
+        <Failover name="FailoverAppender" primary="Syslog">
             <Failovers>
-                <AppenderRef ref="Console"/>
+                <AppenderRef ref="ConsoleAppender"/>
             </Failovers>
         </Failover>
     </Appenders>
     <Loggers>
-        <Root level="debug">
+        <Root level="TRACE">
-            <AppenderRef ref="Failover"/>
+            <AppenderRef ref="FailoverAppender"/>
         </Root>
     </Loggers>
 </Configuration>

logging/log4j2/src/test/resources/log4j2-includes/console-appender_pattern-layout_colored.xml

@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<Console name="Console" target="SYSTEM_OUT">
+<Console name="ConsoleAppender" target="SYSTEM_OUT">
     <PatternLayout pattern="%style{%date{DEFAULT}}{yellow} [%style{%thread}{white}] %highlight{%-5level}{FATAL=bg_red, ERROR=red, WARN=yellow, INFO=green, DEBUG=cyan, TRACE=blue} %style{%logger{36}}{cyan}:%n[+] %message%n%throwable"/>
 </Console>

logging/log4j2/src/test/resources/log4j2-jdbc-appender.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration status="WARN">
+    <Appenders>
+        <JDBC name="JDBCAppender" tableName="logs">
+            <ConnectionFactory class="com.baeldung.logging.log4j2.tests.jdbc.ConnectionFactory"
+                               method="getConnection"/>
+            <Column name="when" isEventTimestamp="true"/>
+            <Column name="logger" pattern="%logger"/>
+            <Column name="level" pattern="%level"/>
+            <Column name="message" pattern="%message"/>
+            <Column name="throwable" pattern="%ex{full}"/>
+        </JDBC>
+    </Appenders>
+    <Loggers>
+        <Root level="trace">
+            <AppenderRef ref="JDBCAppender"/>
+        </Root>
+    </Loggers>
+</Configuration>

logging/log4j2/src/test/resources/log4j2-rolling-file-appender_xml-layout.xml

@@ -1,7 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Configuration status="WARN">
     <Appenders>
-        <RollingFile name="XMLLogfile" fileName="target/logfile.xml"
+        <RollingFile name="XMLLogfileAppender"
+                     fileName="target/logfile.xml"
                      filePattern="target/logfile-%d{yyyy-MM-dd}-%i.log.gz">
             <XMLLayout/>
             <Policies>
@@ -10,8 +11,8 @@
         </RollingFile>
     </Appenders>
     <Loggers>
-        <Root level="trace">
+        <Root level="TRACE">
-            <AppenderRef ref="XMLLogfile"/>
+            <AppenderRef ref="XMLLogfileAppender"/>
         </Root>
     </Loggers>
 </Configuration>

logging/log4j2/src/test/resources/log4j2.xml

@@ -1,13 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Configuration status="WARN">
     <Appenders>
-        <Console name="Console" target="SYSTEM_OUT">
+        <Console name="ConsoleAppender" target="SYSTEM_OUT">
             <PatternLayout pattern="%d [%t] %-5level %logger{36} - %msg%n%throwable"/>
         </Console>
     </Appenders>
     <Loggers>
-        <Root level="error">
+        <Root level="ERROR">
-            <AppenderRef ref="Console"/>
+            <AppenderRef ref="ConsoleAppender"/>
         </Root>
     </Loggers>
 </Configuration>