我正在尝试使用七月适配器将 Java Util Logging 委托给 Log4j2。更准确地说,任何使用 JUL 生成日志的第三方库都应该委托给 Log4j2。
作为一个简单的练习,我创建了一个使用库的独立应用程序(我创建这个库是为了测试目的,它使用 JUL 生成日志)来测试七月适配器。当我按照描述更改日志管理器时here https://logging.apache.org/log4j/2.0/log4j-jul/index.html我可以看到效果。而且效果很好。
她的代码:
import org.apache.logging.log4j.LogManager;
import com.ah.loggen.LogGenerator;
public class TestLogging {
static {
System.setProperty("java.util.logging.manager", "org.apache.logging.log4j.jul.LogManager");
}
private static final org.apache.logging.log4j.Logger LOG4J = LogManager.getLogger();
public static void main(String[] args) {
System.out.println("Java Util Logging");
LogGenerator.generateError("This is an error message.");
LogGenerator.generateInfo("This is an info message.");
LogGenerator.generateWarning("This is a warning message.");
System.out.println("LOG4J");
LOG4J.info("[LOG4J] This is an info message.");
LOG4J.error("[LOG4J] This is an error message.");
LOG4J.warn("[LOG4J] This is a warning message.");
}
}
所需依赖项:
dependencies {
compile group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.10.0'
compile group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.10.0'
compile group: 'org.apache.logging.log4j', name: 'log4j-jul', version: '2.10.0'
compile files('lib/loggen.jar')
testCompile 'junit:junit:4.12'
}
但是,我无法让它在使用 Jersey 的 Java Web 应用程序上运行。 Jersey 使用 JUL,我正在尝试将其与 Log4j2 桥接。
这是build.gradle
file:
apply plugin: 'java'
apply plugin: 'war'
apply plugin: 'eclipse-wtp'
apply from: 'https://raw.github.com/akhikhl/gretty/master/pluginScripts/gretty.plugin'
repositories {
mavenCentral()
}
task wrapper(type: Wrapper) {
gradleVersion = '4.4.1'
}
dependencies {
compile "javax.ws.rs:javax.ws.rs-api:2.1"
compile "org.glassfish.jersey.core:jersey-server:2.22.1"
compile "org.glassfish.jersey.containers:jersey-container-servlet:2.22.1"
compile "org.glassfish.jersey.media:jersey-media-json-jackson:2.22.1"
providedCompile "javax.servlet:javax.servlet-api:3.1.0"
compile group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.8'
compile group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.8'
compile group: 'org.apache.logging.log4j', name: 'log4j-web', version: '2.8'
compile group: 'org.apache.logging.log4j', name: 'log4j-jul', version: '2.8'
}
gretty {
servletContainer = 'tomcat8'
httpPort = 8081
}
我尝试了这些选项:
-
更改扩展类中的日志管理器Application
.
package com.ahoxha.test;
import java.util.HashSet;
import java.util.Set;
import javax.annotation.PostConstruct;
import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;
import com.ahoxha.filters.JerseyLoggingFilter;
@ApplicationPath("")
public class HelloApplication extends Application {
@Override
public final Set<Class<?>> getClasses() {
final Set<Class<?>> classes = new HashSet<>();
classes.add(Hello.class);
classes.add(MessageResource.class);
classes.add(JerseyLoggingFilter.class);
return classes;
}
@PostConstruct
public void init() {
String cn = "org.apache.logging.log4j.jul.LogManager";
System.setProperty("java.util.logging.manager", cn);
}
}
-
更改实现的类中的日志管理器ServletContextListener
package com.ahoxha.context;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.annotation.WebListener;
@WebListener
public class ContextInitializer implements ServletContextListener {
@Override
public void contextInitialized(ServletContextEvent sce) {
System.out.println("Initializing context.");
System.setProperty("java.util.logging.manager", "org.apache.logging.log4j.jul.LogManager");
}
@Override
public void contextDestroyed(ServletContextEvent sce) {
System.out.println("Context destroyed.");
}
}
除了上面的两个选项之外,我还尝试将日志管理器设置为static block
(对于选项 1. 和 2.)
不幸的是,这些选择都不适合我。我想知道这件事应该在哪里完成。我有什么遗漏的吗?