в 18:01, 31 мая 2010

2010-05-31T18:01:45Z

Новая страница

== and assign level and appender to your own logger ==



<source lang="java">

log4j.logger.ru.foo=DEBUG,FILE

</source>



== define a named logger ==



<source lang="java">

log4j.logger.dataAccessLogger = com.apress.logging.logger

</source>



== define the appender named CONSOLE ==



<source lang="java">

log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.conversionPattern=%m%n

</source>



== define the appender named FILE ==



<source lang="java">

log4j.appender.FILE=org.apache.log4j.FileAppender
log4j.appender.FILE.File=${user.home}/log.out

</source>



== define the root logger with two appenders writing to console and file ==



<source lang="java">

log4j.rootLogger = DEBUG, CONSOLE, FILE

</source>



== define your own logger named com.foo ==

== Example log4j Configuration File ==



<source lang="java">

/*
Logging In Java with the JDK 1.4 Logging API and Apache log4j
by Samudra Gupta
Apress Copyright 2003
ISBN:1590590996
*/
//Example log4j Configuration File
/*
#set the level of the root logger to DEBUG and set its appender
as an appender named X
log4j.rootLogger = DEBUG, X
#set the appender named X to be a console appender
log4j.appender.X=org.apache.log4j.ConsoleAppender
#set the layout for the appender X
log4j.appender.X.layout=org.apache.log4j.PatternLayout
log4j.appender.X.layout.conversionPattern=%m%n
*/
// Complex log4j Configuration File
/*
# define the root logger with two appenders writing to console and file
log4j.rootLogger = DEBUG, CONSOLE, FILE
#define your own logger named com.foo
log4j.logger.ru.foo=com.foo.MyLogger
#assign appender to your own logger
log4j.logger.ru.foo.appender=FILE
#define the appender named
FILE log4j.appender.FILE=org.apache.log4j.FileAppender
log4j.appender.FILE.File=${user.home}/log.out
#define the appender named CONSOLE
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.conversionPattern=%m%n
log4j.properties

#set the level of the root logger to DEBUG (the lowest level) and
set its appender
#as an appender named X
log4j.rootLogger = DEBUG, X
#set your own logger
log4j.logger.ru.apress.logging.log4j=DEBUG, X
#set the appender named X to be a console appender
log4j.appender.X=org.apache.log4j.ConsoleAppender
#set the layout for the appender X
log4j.appender.X.layout=org.apache.log4j.PatternLayout
log4j.appender.X.layout.conversionPattern=%p-%m%n
*/

</source>



== html.properties: configuring the custom logger ==



<source lang="java">

log4j.logger.ru.apress.logging.log4j=DEBUG, FILE
log4j.appender.FILE=org.apache.log4j.FileAppender
log4j.appender.FILE.File=htmlLayout.html
log4j.appender.FILE.layout=org.apache.log4j.HTMLLayout
log4j.appender.FILE.layout.Title=HTML Layout Demo
log4j.appender.FILE.layout.LocationInfo=true

</source>



== jdbc.properties configuration file for log4j ==



<source lang="java">

#configuring the custom logger
log4j.logger.ru.apress.logging.log4j=DEBUG, DB
log4j.appender.DB=org.apache.log4j.jdbc.JDBCAppender
log4j.appender.DB.URL=jdbc:odbc:dbdef
log4j.appender.DB.user=system
log4j.appender.DB.password=manager
log4j.appender.DB.sql=INSERT INTO LOGGING_DATA VALUES("%x","%d{yyyy-MM-dd}","%C","%p","%m")

</source>



== jms.properties configuration file for JMS ==



<source lang="java">

#configuring the custom logger
log4j.logger.ru.apress.logging.log4j=DEBUG, JMS
#configuring the JMS appender
log4j.appender.JMS=org.apache.log4j.net.JMSAppender
log4j.appender.JMS.topicConnectionFactoryBindingName=TopicConnectionFactory
log4j.appender.JMS.topicBindingName=loggingTopic

</source>



== log4j: A complete example ==



<source lang="java">

/*
Logging In Java with the JDK 1.4 Logging API and Apache log4j
by Samudra Gupta
Apress Copyright 2003
ISBN:1590590996
*/
import org.apache.log4j.or.ObjectRenderer;
import org.apache.log4j.Logger;
import org.apache.log4j.spi.Filter;
import org.apache.log4j.spi.LoggingEvent;
class CustomerOrder {
/** Holds value of property productName. */
private String productName;
/** Holds value of property productCode. */
private int productCode;
/** Holds value of property productPrice. */
private int productPrice;
/** Creates a new instance of CustomerOrder */
public CustomerOrder() {
}
public CustomerOrder(String name, int code, int price) {
this.productCode = code;
this.productPrice = price;
this.productName = name;
}
/**
* Getter for property productName.
*
* @return Value of property productName.
*/
public String getProductName() {
return this.productName;
}
/**
* Setter for property productName.
*
* @param productName
* New value of property productName.
*/
public void setProductName(String productName) {
this.productName = productName;
}
/**
* Getter for property productCode.
*
* @return Value of property productCode.
*/
public int getProductCode() {
return this.productCode;
}
/**
* Setter for property productCode.
*
* @param productCode
* New value of property productCode.
*/
public void setProductCode(int productCode) {
this.productCode = productCode;
}
/**
* Getter for property productPrice.
*
* @return Value of property productPrice.
*/
public int getProductPrice() {
return this.productPrice;
}
/**
* Setter for property productPrice.
*
* @param productPrice
* New value of property productPrice.
*/
public void setProductPrice(int productPrice) {
this.productPrice = productPrice;
}
}
class ProductFilter extends Filter {
/** Creates a new instance of ProductFilter */
public ProductFilter() {
}
public int decide(LoggingEvent event) {
int result = this.ACCEPT;
//obtaining the message object passed through Logger
Object message = event.getMessage();
//checking if the message object is of correct type
if (message instanceof CustomerOrder) {
CustomerOrder order = (CustomerOrder) message;
int productCode = order.getProductCode();
//checking for the product code greater than 100 only
if (productCode < 100) {
result = this.DENY;
}
} else {
//this filter can ignore this, pass to next filter
result = this.NEUTRAL;
}
return result;
}
}
class OrderRenderer implements ObjectRenderer {
private static final String separator = "-";
/** Creates a new instance of OrderRenderer */
public OrderRenderer() {
}
public String doRender(Object obj) {
StringBuffer buffer = new StringBuffer(50);
CustomerOrder order = null;
String productName = null;
int productCode = 0;
int productPrice = 0;
//check if the instance is of correct type CustomerOrder
if (obj instanceof CustomerOrder) {
order = (CustomerOrder) obj;
productName = order.getProductName();
productCode = order.getProductCode();
productPrice = order.getProductPrice();
buffer.append(productName);
buffer.append(separator);
buffer.append(new Integer(productCode).toString());
buffer.append(separator);
buffer.append(new Integer(productPrice).toString());
}
return buffer.toString();
}
}
public class ProductFilterDemo {
private static Logger logger = Logger.getLogger("name");
/** Creates a new instance of ProductFilterDemo */
public ProductFilterDemo() {
}
public void processOrder(CustomerOrder order) {
logger.info(order);
}
public static void main(String args[]) {
CustomerOrder order1 = new CustomerOrder("Beer", 101, 20);
CustomerOrder order2 = new CustomerOrder("Lemonade", 95, 10);
CustomerOrder order3 = new CustomerOrder("Chocolate", 223, 5);
ProductFilterDemo demo = new ProductFilterDemo();
demo.processOrder(order1);
demo.processOrder(order2);
demo.processOrder(order3);
}
}
//filter_properties.xml
/*
*
* <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE log4j:configuration SYSTEM
* "log4j.dtd">
*
* <log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
*
* <renderer renderedClass="com.apress.business.CustomerOrder"
* renderingClass="com.apress.logging.log4j.renderer.OrderRenderer"> </renderer>
*
* <appender name="A1" class="org.apache.log4j.ConsoleAppender">
*
* <layout class="org.apache.log4j.PatternLayout"> <param
* name="ConversionPattern" value="%t %-5p %c{2} - %m%n"/> </layout> <filter
* class="com.apress.logging.log4j.filter.ProductFilter"/> </appender>
*
* <logger name="com.apress.logging.log4j"> <level value="debug"/> <appender-ref
* ref="A1"/> </logger> </log4j:configuration>
*/

</source>



== log4j: advanced log ==



<source lang="java">

/*
Logging In Java with the JDK 1.4 Logging API and Apache log4j
by Samudra Gupta
Apress Copyright 2003
ISBN:1590590996
*/

import org.apache.log4j.Logger;
import org.apache.log4j.NDC;
public class AdvancedLogging {
private static Logger logger = Logger.getLogger("name");
private String userName = null;
private double balance;
/** Creates a new instance of AdvancedLogging */
public AdvancedLogging(String user) {
this.userName = user;
}
/**
* Deposit some amount
*/
public void deposit(double amount) {
NDC.push(userName);
balance += amount;
logger.info("Deposited " + amount + " new balance: " + balance);
NDC.pop();
}
/**
* withdraw some amount
*/
public void withdraw(double amount) {
NDC.push(userName);
if (balance >= amount) {
balance -= amount;
logger.info("Withdrawn " + amount + " new balance: " + balance);
} else {
System.out.println("Not enough balance");
logger.error("Failed to withdraw: balance: " + balance
+ " attempted withdraw: " + amount);
}
NDC.pop();
}
public static void main(String args[]) {
AdvancedLogging demo = new AdvancedLogging("sam");
demo.deposit(100.50);
demo.withdraw(80);
demo.withdraw(50);
}
}

</source>



== log4j: asynchronous log ==



<source lang="java">

/*
Logging In Java with the JDK 1.4 Logging API and Apache log4j
by Samudra Gupta
Apress Copyright 2003
ISBN:1590590996
*/

import org.apache.log4j.AsyncAppender;
import org.apache.log4j.ConsoleAppender;
import org.apache.log4j.Logger;
public class AsyncLogging {
private static Logger logger = Logger.getLogger("name");
private AsyncAppender asyncAppender = null;
private ConsoleAppender consoleAppender = null;
/** Creates a new instance of AsyncLogging */
public AsyncLogging() {
try {
logger.setAdditivity(false);
asyncAppender = (AsyncAppender) logger.getRootLogger().getAppender(
"ASYNC");
asyncAppender.setBufferSize(4);
} catch (Exception e) {
System.out.println("error: " + e.toString());
}
}
/**
* This method simply logs the messages
*/
public void doLogging() {
logger.debug("Hello 1");
logger.debug("Hello 2");
logger.debug("Hello 3");
//logger.debug("Hello 4");
//logger.debug("Hello 5");
}
/**
* the main method
*/
public static void main(String args[]) {
AsyncLogging demo = new AsyncLogging();
demo.doLogging();
}
}

</source>



== log4j config file: configuring the appender CONSOLE ==



<source lang="java">

log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.TTCCLayout

</source>



== log4j config file: configuring the layout TTCCLayout ==



<source lang="java">

log4j.appender.CONSOLE.layout.ThreadPrinting=false
og4j.appender.CONSOLE.layout.ContextPrinting=false
log4j.appender.CONSOLE.layout.CategoryPrefixing=false
log4j.appender.CONSOLE.layout.DateFormat=RELATIVE

</source>



== log4j config file: configuring the named logger ==



<source lang="java">

log4j.logger.ru.apress.logging.log4j=DEBUG, CONSOLE

</source>



== log4j config file: configuring the root logger ==



<source lang="java">

log4j.rootLogger=DEBUG, CONSOLE

</source>



== log4j Configuration File: assign appender to your own logger ==



<source lang="java">

log4j.logger.ru.foo.appender=FILE

</source>



== log4j Configuration File: define the appender named ==



<source lang="java">

FILE log4j.appender.FILE=org.apache.log4j.FileAppender
log4j.appender.FILE.File=${user.home}/log.out

</source>



== log4j Configuration File: define the appender named CONSOLE ==



<source lang="java">

log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.conversionPattern=%m%n

</source>



== log4j Configuration File: define the root logger with two appenders writing to console and file ==



<source lang="java">

log4j.rootLogger = DEBUG, CONSOLE, FILE

</source>



== log4j Configuration File: define your own logger named com.foo ==



<source lang="java">

log4j.logger.ru.foo=com.foo.MyLogger

</source>



== log4j Configuration File: set the appender named X to be a console appender ==



<source lang="java">

log4j.appender.X=org.apache.log4j.ConsoleAppender

</source>



== log4j Configuration File: set the layout for the appender X ==



<source lang="java">

log4j.appender.X.layout=org.apache.log4j.PatternLayout
log4j.appender.X.layout.conversionPattern=%m%n

</source>



== log4j Configuration File: #set the level of the root logger to DEBUG and set its appender as an appender named X ==



<source lang="java">

log4j.rootLogger = DEBUG, X

</source>



== log4j: File Based Logg Demo ==



<source lang="java">

/*
Logging In Java with the JDK 1.4 Logging API and Apache log4j
by Samudra Gupta
Apress Copyright 2003
ISBN:1590590996
*/
import org.apache.log4j.*;
public class FileBasedLoggingDemo implements Runnable {
private static Logger logger = Logger.getLogger("filename");
/** Creates a new instance of FileBasedLoggingDemo */
public FileBasedLoggingDemo() {
}
/**
* This method is called by the application. This method creates a new
* thread to start logging
*/
public void doLogging() {
Thread t = new Thread(this);
t.start();
}
/**
* The thread"s run() method, which does repeated logging at an interval of
* 60secs.
*/
public void run() {
int count = 1;
while (true) {
//logging information
try {
logger.debug("Logging the information..." + count);
Thread.sleep(60 * 1000);
count++;
} catch (Exception e) {
logger.warn("Exception occured", e);
}
}
}
/**
* the main method
*/
public static void main(String args[]) {
FileBasedLoggingDemo demo = new FileBasedLoggingDemo();
demo.doLogging();
}
}

</source>



== log4j: layout demo ==



<source lang="java">

/*
Logging In Java with the JDK 1.4 Logging API and Apache log4j
by Samudra Gupta
Apress Copyright 2003
ISBN:1590590996
*/
import org.apache.log4j.Logger;
import org.apache.log4j.ConsoleAppender;
import org.apache.log4j.TTCCLayout;
import org.apache.log4j.NDC;
public class LayoutDemo {
private static Logger logger = Logger.getLogger("name");
private ConsoleAppender appender = null;
private TTCCLayout layout = null;
/** Creates a new instance of LayoutDemo */
public LayoutDemo() {
//set the parent additivity to false
logger.setAdditivity(false);
//initialize the layout
layout = new TTCCLayout("yyyy-MM-dd");
//initialize the console appender with the layout
appender = new ConsoleAppender(layout, "System.out");
//adding the console appender to the logger
logger.addAppender(appender);
}
public void computeSquareRoot(double number) {
NDC.push(new Double(number).toString());
double sqrt = Math.sqrt(number);
logger.info("The sqrt value: " + sqrt);
NDC.pop();
}
public static void main(String args[]) {
LayoutDemo demo = new LayoutDemo();
demo.ruputeSquareRoot(22);
demo.ruputeSquareRoot(44);
}
}

</source>



== log4j: log and servlet ==



<source lang="java">

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.PrintWriter;
import java.io.IOException;
import org.apache.log4j.*;
public class LoggingServlet extends HttpServlet {
private static Logger logger =Logger.getLogger(LoggingServlet.class);
public void doPost(HttpServletRequest req, HttpServletResponse res)
throws IOException, ServletException
{
logger.info("invoked the LoggingServlet...");
PrintWriter writer = res.getWriter();
writer.println("Check your web server console...");
writer.flush();
writer.close();
}
}

</source>



== log4j.properties: daily layout ==



<source lang="java">

log4j.appender.DAILY.layout=org.apache.log4j.PatternLayout
log4j.appender.DAILY.layout.conversionPattern=%p - %m%n

</source>



== log4j.properties: file layout ==



<source lang="java">

log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.conversionPattern=%p - %m%n

</source>



== log4j.properties: rolling layout ==



<source lang="java">

log4j.appender.ROLLING.layout=org.apache.log4j.PatternLayout
log4j.appender.ROLLING.layout.conversionPattern=%p - %m%n

</source>



== log4j.properties: set the appender CONSOLE ==



<source lang="java">

log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender

</source>



== log4j.properties: set the appender DAILY ==



<source lang="java">

log4j.appender.DAILY=org.apache.log4j.DailyRollingFileAppender
log4j.appender.DAILY.File=${user.home}/daily.log
log4j.appender.DAILY.DatePattern="." yyyy-MM-dd-HH-mm

</source>



== log4j.properties: set the appender FILE ==



<source lang="java">

log4j.appender.FILE=org.apache.log4j.FileAppender
log4j.appender.FILE.File=${user.home}/out.log

</source>



== log4j.properties: set the appender ROLLING ==



<source lang="java">

log4j.appender.ROLLING=org.apache.log4j.RollingFileAppender
log4j.appender.ROLLING.File=${user.home}/rolling.log
log4j.appender.ROLLING.MaxFileSize=1KB

</source>



== log4j.properties: set the layout for the appenders ==



<source lang="java">

log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.conversionPattern=%p - %m%n

</source>



== log4j.properties: set the level of the root logger to DEBUG (the lowest level) and set its appenders named DEBUG and CONSOLE ==



<source lang="java">

log4j.rootLogger = DEBUG, CONSOLE

</source>



== log4j.properties: set your own logger ==



<source lang="java">

log4j.logger.ru.apress.logging.log4j=DEBUG, FILE, ROLLING, DAILY

</source>



== log4j: simple log ==



<source lang="java">

/*
Logging In Java with the JDK 1.4 Logging API and Apache log4j
by Samudra Gupta
Apress Copyright 2003
ISBN:1590590996
*/
import org.apache.log4j.Logger;
public class SimpleLogging {
/** Creates a new instance of SimpleLogging */
public SimpleLogging() {
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
Logger logger =Logger.getLogger("name");
logger.info("Hello this is an info message");
}
}

</source>



== Logging Servlet with log4j ==



<source lang="java">

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.PrintWriter;
import java.io.IOException;
import org.apache.log4j.*;
public class LoggingServlet extends HttpServlet {
private static Logger logger = Logger.getLogger(LoggingServlet.class);
public void doPost(HttpServletRequest req, HttpServletResponse res)
throws IOException, ServletException
{
logger.info("invoked the LoggingServlet...");
PrintWriter writer = res.getWriter();
writer.println("Check your web server console...");
writer.flush();
writer.close();
}
}

</source>



== nt.properties for NT configuration ==



<source lang="java">

#configuring the custom logger
log4j.logger.ru.apress.logging.log4j=DEBUG, NT
#configuring the NT appender
log4j.appender.NT=org.apache.log4j.nt.NTEventLogAppender
log4j.appender.NT.layout=org.apache.log4j.SimpleLayout

</source>



== Pass the configuration file and configuration class ==



<source lang="java">

java -Dlog4j.configuration=config file yourApp
java -Dlog4j.configurationClass=config class yourApp

</source>



== set the appender named testAppender to be a console appender ==



<source lang="java">

log4j.appender.testAppender=org.apache.log4j.ConsoleAppender

</source>



== set the layout for the appender testAppender ==



<source lang="java">

log4j.appender.testAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.testAppender.layout.conversionPattern=%m%n

</source>



== set the level of the root logger to DEBUG and set its appender as an appender named testAppender ==



<source lang="java">

log4j.rootLogger = DEBUG, testAppender

</source>



== smtp.properties for EMail based logging ==



<source lang="java">

#configuring the custom logger
log4j.logger.ru.apress.logging.log4j=DEBUG, SMTP
#configuring the SMTP appender
log4j.appender.SMTP=org.apache.log4j.net.SMTPAppender
log4j.appender.SMTP.SMTPHost=smtp.mail.yahoo.ru
log4j.appender.SMTP.to=clientname@mailserver.ru
log4j.appender.SMTP.subject=Testing the appender
log4j.appender.SMTP.from=yourname@mailserver.ru
log4j.appender.SMTP.layout=org.apache.log4j.SimpleLayout

</source>



== xml.properties: configuring the custom logger ==



<source lang="java">

log4j.logger.ru.apress.logging.log4j=DEBUG, FILE
log4j.appender.FILE=org.apache.log4j.FileAppender
log4j.appender.FILE.File=xmlLayout.xml
log4j.appender.FILE.layout=org.apache.log4j.xml.XMLLayout
log4j.appender.FILE.layout.LocationInfo=true

</source>

Java/Language Basics/Log4j - История изменений

Admin: 1 версия

в 18:01, 31 мая 2010

← Предыдущая	Версия 06:47, 1 июня 2010
(нет различий)