[Experimental] Add JDBC appender for PostgreSQL

pom.xml

@@ -1,5 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xmlns="http://maven.apache.org/POM/4.0.0"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <parent>
         <groupId>org.jenkins-ci.plugins</groupId>
@@ -153,6 +155,40 @@
             <scope>test</scope>
         </dependency>
 
+<!--     Arguments given for element JDBC are invalid: field 'connectionSource' has invalid value 'null'   &lt;!&ndash; https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-jdbc-dbcp2 &ndash;&gt;-->
+<!--        <dependency>-->
+<!--            <groupId>org.apache.logging.log4j</groupId>-->
+<!--            <artifactId>log4j-jdbc-dbcp2</artifactId>-->
+<!--            <version>2.12.0</version>-->
+<!--        </dependency>-->
+
+        <!-- https://mvnrepository.com/artifact/org.postgresql/postgresql -->
+        <dependency>
+            <groupId>org.postgresql</groupId>
+            <artifactId>postgresql</artifactId>
+            <version>9.4.1212</version>
+        </dependency>
+        <!-- https://mvnrepository.com/artifact/commons-dbcp/commons-dbcp -->
+        <dependency>
+            <groupId>commons-dbcp</groupId>
+            <artifactId>commons-dbcp</artifactId>
+            <version>1.4</version>
+        </dependency>
+        <dependency>
+            <groupId>commons-pool</groupId>
+            <artifactId>commons-pool</artifactId>
+            <version>1.6</version>
+        </dependency>
+
+        <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-dbcp2 -->
+<!--        <dependency>-->
+<!--            <groupId>org.apache.commons</groupId>-->
+<!--            <artifactId>commons-dbcp2</artifactId>-->
+<!--            <version>2.6.0</version>-->
+<!--        </dependency>-->
+<!--        -->
+
+
 
     </dependencies>
 

src/main/java/io/jenkins/plugins/audit/db/ConnectionFactory.java

@@ -0,0 +1,49 @@
+package io.jenkins.plugins.audit.db;
+
+
+import java.sql.Connection;
+import java.sql.SQLException;
+import java.util.Properties;
+
+import javax.sql.DataSource;
+
+import org.apache.commons.dbcp.DriverManagerConnectionFactory;
+import org.apache.commons.dbcp.PoolableConnection;
+import org.apache.commons.dbcp.PoolableConnectionFactory;
+import org.apache.commons.dbcp.PoolingDataSource;
+import org.apache.commons.pool.impl.GenericObjectPool;
+
+
+public class ConnectionFactory {
+
+    public static interface Singleton {
+        final ConnectionFactory INSTANCE = new ConnectionFactory();
+    }
+
+    private final DataSource dataSource;
+
+    private ConnectionFactory() {
+
+        try {
+            Class.forName("org.postgresql.Driver");
+        } catch (ClassNotFoundException e) {
+            e.printStackTrace();
+            System.exit(0);
+        }
+
+        Properties properties = new Properties();
+        properties.setProperty("user", "aarthi");
+        properties.setProperty("password", "postgres");
+
+        GenericObjectPool<PoolableConnection> pool = new GenericObjectPool<PoolableConnection>();
+        DriverManagerConnectionFactory connectionFactory = new DriverManagerConnectionFactory(
+                "jdbc:postgresql://localhost:5432/audit_logs", properties
+        );
+        new PoolableConnectionFactory(connectionFactory, pool, null, "SELECT 1", 100, false, false, Connection.TRANSACTION_READ_COMMITTED);
+        this.dataSource = new PoolingDataSource(pool);
+    }
+
+    public static Connection getDatabaseConnection() throws SQLException {
+        return Singleton.INSTANCE.dataSource.getConnection();
+    }
+}

src/main/resources/log4j2.xml

@@ -28,10 +28,20 @@
                 <SizeBasedTriggeringPolicy size="20 MB"/>
             </Policies>
         </RollingRandomAccessFile>
+        <JDBC name="Db_appender" tableName="jenkins_log">
+            <ConnectionFactory
+                    class="io.jenkins.plugins.audit.db.ConnectionFactory" method="getDatabaseConnection" />
+            <Column name="LOG_ID" pattern="%u" isUnicode="false"/>
+            <Column name="ENTRY_DATE" isEventTimestamp="true" />
+            <Column name="LOGGER" pattern="%logger" isUnicode="false"/>
+            <Column name="LOG_LEVEL" pattern="%level" isUnicode="false"/>
+            <Column name="MESSAGE" pattern="%m" isUnicode="false" />
+         </JDBC>
     </Appenders>
     <Loggers>
         <Logger name="AuditLogger" level="trace" additivity="false">
             <AppenderRef ref="audit"/>
+            <AppenderRef ref="Db_appender"/>
         </Logger>
     </Loggers>
 </Configuration>