仅供参考,我包括您在您的评论中提供的信息:
我想避免使用log.error或log.warn明确的逻辑出了RX-流动的,而不是定义层次例外的是可配置在logj4或某处映射什么例外日志级别分别
这里是你如何能做到这一点很简单的例子:
package example;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import org.apache.logging.log4j.Level;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
public class SomeClass {
private static final Logger log = LogManager.getLogger();
//Quick and dirty way to generate a map of exceptions to their log levels. Replace this with whatever method of configuration you prefer.
public static Map<String,String> getExceptionLvlMap(){
Map<String,String> exceptionToLvlMap = new HashMap<>();
exceptionToLvlMap.put("java.io.IOException", "WARN");
exceptionToLvlMap.put("java.lang.NullPointerException", "FATAL");
return exceptionToLvlMap;
}
public static void main(String[] args){
Map<String, String> lvlMap = getExceptionLvlMap();
try {
someOperation();
} catch (IOException e) {
log.log(Level.getLevel(lvlMap.get(e.getClass().getName())), "Something bad happened!", e);
}
try{
anotherOperation();
}catch(Throwable t){
log.log(Level.getLevel(lvlMap.get(t.getClass().getName())), "Something crazy happened!", t);
}
}
public static void someOperation() throws IOException{
throw new IOException("It's an IOException!");
}
public static void anotherOperation(){
String x = null;
//Generate a NPE
x.equals("foo");
}
}
log4j2.xml配置文件:
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
<Appenders>
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
</Console>
</Appenders>
<Loggers>
<Root level="debug">
<AppenderRef ref="Console"/>
</Root>
</Loggers>
</Configuration>
输出:
23:24:50.217 [main] WARN example.SomeClass - Something bad happened!
java.io.IOException: It's an IOException!
at example.SomeClass.someOperation(SomeClass.java:40) ~[classes/:?]
at example.SomeClass.main(SomeClass.java:27) [classes/:?]
23:24:50.221 [main] FATAL example.SomeClass - Something crazy happened!
java.lang.NullPointerException: null
at example.SomeClass.anotherOperation(SomeClass.java:45) ~[classes/:?]
at example.SomeClass.main(SomeClass.java:33) [classes/:?]
捕获该异常,并用'logger.warn()'记录它自己吗? –
如果抛出一个异常但不捕捉它,它可能会停止程序的执行并导致错误。您需要捕获异常并使用Sergei建议的'logger.warn(Exception e)'记录它。如果您需要像以前一样停止执行,那么您可以在记录日志后再次抛出异常。 – clinomaniac
这个想法是:我想避免使用log.error或log.warn的显式逻辑超出rx-flow,而是定义可在logj4中配置的异常层次结构,或者在某处将异常映射到日志级别的地方 – ses