Добре, решението е:
1- създайте клас Фабрика за връзки
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 {
private static interface Singleton {
final ConnectionFactory INSTANCE = new ConnectionFactory();
}
private final DataSource dataSource;
private ConnectionFactory() {
try {
Class.forName("com.mysql.jdbc.Driver");
} catch (ClassNotFoundException e) {
e.printStackTrace();
System.exit(0);
}
Properties properties = new Properties();
properties.setProperty("user", "root");
properties.setProperty("password", "root");
GenericObjectPool<PoolableConnection> pool = new GenericObjectPool<PoolableConnection>();
DriverManagerConnectionFactory connectionFactory = new DriverManagerConnectionFactory(
"jdbc:mysql://example.org:3306/exampleDb", properties
);
new PoolableConnectionFactory(connectionFactory, pool, null, "SELECT 1", 3, false, false, Connection.TRANSACTION_READ_COMMITTED);
this.dataSource = new PoolingDataSource(pool);
}
public static Connection getDatabaseConnection() throws SQLException {
return Singleton.INSTANCE.dataSource.getConnection();
}
}
2- създайте конфигурационен файл в src/main/resources, наречен log4j2.xml
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="TRACE" monitorInterval="30">
<Appenders>
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
</Console>
<JDBC name="databaseAppender" tableName="logs">
<ConnectionFactory class="my.pack.ConnectionFactory"
method="getDatabaseConnection" />
<!-- <Column name="id" literal="LOGGING.APPLICATION_LOG_SEQUENCE.NEXTVAL" /> -->
<Column name="date" isEventTimestamp="true" />
<Column name="level" pattern="%level" />
<Column name="message" pattern="%message" />
<Column name="class" pattern="%class" />
</JDBC>
</Appenders>
<Loggers>
<Root level="trace">
<AppenderRef ref="Console" />
<AppenderRef ref="databaseAppender" />
</Root>
</Loggers>
</Configuration>
3- създайте таблица като тази:
4- добавете mysql конектор към {tomcat}/bin
Maven намеква:
<commons-dbcp.version>1.4</commons-dbcp.version>
<commons-pool.version>1.6</commons-pool.version>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>${commons-dbcp.version}</version>
</dependency>
<dependency>
<groupId>commons-pool</groupId>
<artifactId>commons-pool</artifactId>
<version>${commons-pool.version}</version>
</dependency>