如何以編程方式配置JDBCAppender

Question

使用Java配置JDBCAppender涉及哪些步驟？

我想給appender JDBC參數，讓它建立日誌表並開始記錄。

Answer 1

你可以參考以下幾點：

package org.apache.log4j.jdbcplus.examples.test; 

import java.sql.Driver; 
import java.sql.Types; 
import java.sql.DriverManager; 

import org.apache.log4j.Level; 
import org.apache.log4j.Logger; 
import org.apache.log4j.jdbcplus.JDBCAppender; 
import org.apache.log4j.jdbcplus.JDBCLogType; 
import org.apache.log4j.jdbcplus.examples.MyColumnHandler; 
import org.apache.log4j.jdbcplus.examples.MyIDHandler; 

// Here is a code example to configure the JDBCAppender without a configuration-file using the JDBCIDHandler and JDBCColumnHandler : 

public class SourceConfigOracleTest { 
// Create a category instance for this class 
static Logger logger = Logger.getLogger(Log4JTest.class.getName()); 

public static void main(String[] args) { 
// A JDBCIDHandler 
MyIDHandler idhandler = new MyIDHandler(); 

// A JDBCColumnHandler 
MyColumnHandler colHandler = new MyColumnHandler(); 

// Ensure to have all necessary drivers installed ! 
try { 
    Driver d = (Driver) (Class.forName("oracle.jdbc.driver.OracleDriver").newInstance()); 
    DriverManager.registerDriver(d); 
} catch (Exception e) { 
    e.printStackTrace(); 
} 

// Set the priority which messages have to be logged 
logger.setLevel(Level.INFO); 

// Create a new instance of JDBCAppender 
JDBCAppender ja = new JDBCAppender(); 

// Set options with method setOption() 
ja.setConnector("org.apache.log4j.jdbcplus.examples.OracleConnectionHandler"); 
ja.setUrl(
    "jdbc:oracle:thin:@" 
    + "(DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP)(HOST = 62.52.100.41)(PORT = 1521)))" 
    + "(CONNECT_DATA = (SERVICE_NAME = oracle8i)))"); 
ja.setUsername("danko"); 
ja.setPassword("danko"); 

ja.setTable("logtest"); 

ja.setColumn("id", JDBCLogType.ID, idhandler, "INTEGER", Types.INTEGER); 
ja.setColumn("prio", JDBCLogType.PRIO, "", "VARCHAR", Types.VARCHAR); 
ja.setColumn("cat", JDBCLogType.CAT, "", "VARCHAR", Types.VARCHAR); 
ja.setColumn("msg", JDBCLogType.MSG, "", "VARCHAR", Types.VARCHAR); 
ja.setColumn("info", JDBCLogType.DYNAMIC, colHandler, "VARCHAR", Types.VARCHAR); 
ja.setColumn("addon", JDBCLogType.EMPTY, "", "VARCHAR", Types.VARCHAR); 
ja.setColumn("the_timestamp", JDBCLogType.TIMESTAMP, "", "TIMESTAMP", Types.TIMESTAMP); 
ja.setColumn("created_by", JDBCLogType.STATIC, "ME", "VARCHAR", Types.VARCHAR); 

// other options 
//ja.setBuffer("1"); 
//ja.setCommit("Y"); 

// Add the appender to a category 
logger.addAppender(ja); 

// These messages with Priority >= setted priority will be logged to the database. 
logger.debug("debug"); 
logger.info("info"); 
logger.error("error"); 
logger.fatal("fatal"); 

// not required 
logger.removeAppender(ja); 
} 
}