slf4j | 易学教程

hbase1.4.0安装和使用

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jia下载地址: http://mirrors.shuosc.org/apache/hbase/1.4.0/ 解压 tar -zxvf hbase-1.4.0-bin.tar.gz 修改环境变量 [root@10 hbase-1.4.0]# vi /etc/profile [root@10 hbase-1.4.0]# source /etc/profile 添加内容: export HBASE_HOME=/home/sri_udap/app/hbase-1.4.0 export PATH=$PATH:$HBASE_HOME/bin 1. 修改hbase-env.sh文件,添加或修改内容: export JAVA_HOME=/usr/java/jdk1.8.0_121 export HBASE_CLASSPATH=/home/sri_udap/app/hbase-1.4.0/conf export HBASE_MANAGES_ZK=true 2.修改hbase-site.xml,添加内容如下: <configuration> #添加如下内容 <property> <name>hbase.rootdir</name> #设置hbase数据库存放数据的目录 <value>hdfs://master:9000/hbase</value> </property> <property>

拷贝HttpRequestBase对象

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 在实践性能测试框架第二版的过程中，我实现了一个单个HttpRequestBase对象的concurrent对象创建，单之前都是用使用唯一的HttpRequestBase对象进行多线程请求，目前来看是没有问题的，但为了防止以后出现意外BUG和统一concurrent的构造方法使用，故尝试拷贝了一个HttpRequestBase对象。原因是因为之前封装的深拷贝方法对于HttpRequestBase对象的实现类如：httpget和httppost并不适用，因为没有实现Serializable接口。所以单独写了一个HttpRequestBase对象的拷贝方法，供大家参考。下面是 FunRequest 类的代码，深拷贝的静态方法在最后。 package com.fun.frame.httpclient import com.fun.base.bean.RequestInfo import com.fun.base.exception.RequestException import com.fun.config.HttpClientConstant import com.fun.config.RequestType import net.sf.json.JSONObject import org.apache

Using Actor Logging Via SLF4j and logback vs using org.slf4j to log using SLF4J and logback

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问题 I am confused with the best practice to use in logging. I found by reading that SLF4J removes the coupling between the application and logging API etc. So if i use actor logging, will it not be closely coupled to application?.I have also checked a lot of github codes and i noticed that they only use actor logging and not org.SLF4J.LoggerFactory logging. Why? Some links which i referred SACHA'S BLOG OF PROGRAMMATICALNESS Another Good read stack Overflow -> Checked the last answer Thanks in

Hide third party jar logs from logback or properties file

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问题 I am using Third Party jars which are appending their own logs in my Java Application's Log file , I don't want to append those third party logs in my log file as it makes log file very clumsy and confusing. The logs are like - `2016-11-03 12:59:41.910 ERROR 13586 --- [ main] o.h.j.i.metamodel.MetadataContext : HHH015011: Unable to locate static metamodel field : org.openskye.domain.TaskQueue_#object_metadata_id 2016-11-03 12:59:41.913 ERROR 13586 --- [ main] o.h.j.i.metamodel.MetadataContext

Playframework quit logging after application starts, but works for Global.onStart()

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问题 I wrote a play 2.2.1 application and I have problems with logging. I defined a logger per class in this way: import org.slf4j.LoggerFactory; import org.slf4j.Logger; public class Foo extends Controller { private static Logger logger = LoggerFactory.getLogger(Foo.class); public Result bar(){ logger.info("Bar called"); . . . } } I am not using a logger.xml . Everything perfectly works in dev mode and every class logs fine. When I run in dist mode, it stops logging after the application is

logger.isDebugEnabled() is killing my code coverage. I'm planning to exclude it while running cobertura

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问题 I tried by adding in org.slf4j.* in cobertura.exclude. but there is no use. my buildfile require 'buildr/java/cobertura' require 'buildr/scala' require 'buildr/myProject' ..... ..... compile.options.other = %w(-encoding UTF-8) cobertura.exclude= 'org.slf4j.*' ..... ..... Please suggest how to proceed. Thank you in advance 回答1: The issue is that cobertura.exclude is to exclude files/classes in your project from being instrumented. What you want to use is cobertura.ignore , e.g., cobertura

LOGBACK : How to log entire msg using JSONLayout

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问题 We are changing our logs from Text to JSON. I used below code to implement JSON logs : LayoutWrappingEncoder layoutEncoder = new LayoutWrappingEncoder(); ch.qos.logback.contrib.json.classic.JsonLayout layout= new ch.qos.logback.contrib.json.classic.JsonLayout(); ch.qos.logback.contrib.jackson.JacksonJsonFormatter jsonFormatter=new ch.qos.logback.contrib.jackson.JacksonJsonFormatter(); jsonFormatter.setPrettyPrint(true); layout.setJsonFormatter(jsonFormatter); layout.setTimestampFormat("yyyy

惊讶！我定的日志规范被CTO在全公司推广了

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 打印日志是一门艺术，但长期被开发同学所忽视。日志就像车辆保险，没人愿意为保险付钱，但是一旦出了问题都又想有保险可用。我们打印日志的时候都很随意，可是用的时候会吐槽各种 SB 包括自己！写好每一条日志吧，与君共勉！日志日志是什么？日志，维基百科的定义是记录服务器等电脑设备或软件的运作。日志文件提供精确的系统记录，根据日志最终定位到错误详情和根源。日志的特点是，它描述一些离散的（不连续的）事件。例如：应用通过一个滚动的文件输出 INFO 或 ERROR 信息，并通过日志收集系统，存储到一些存储引擎（Elasticsearch）中方便查询。日志有什么用？在上文中我们解释了日志的作用是提供精准的系统记录方便根因分析。那么具体在哪些具体方面它可以发挥作用？打印调试：即可以用日志来记录变量或者某一段逻辑。记录程序运行的流程，即程序运行了哪些代码，方便排查逻辑问题。问题定位：程序出异常或者出故障时快速的定位问题，方便后期解决问题。因为线上生产环境无法 debug，在测试环境去模拟一套生产环境，费时费力。所以依靠日志记录的信息定位问题，这点非常重要。还可以记录流量，后期可以通过 ELK（包括 EFK 进行流量统计）。用户行为日志：记录用户的操作行为，用于大数据分析，比如监控、风控、推荐等等。这种日志

Jetty6 slf4j logging - how to get custom log Formatter to work?

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问题 I'm using jetty6 with SLF4J and java logging and have been trying to add a custom log Formatter, but no matter what I try I can't seem to get it to work. I have a Formatter, like this: package mycode.logging; public class DeadSimpleFormatter extends SimpleFormatter { // Nothing here at all - just an empty subclass of SimpleFormatter. } I want to use this as the default for my jetty logging, so I've created a ${jetty.home}/resources/logging.properties file: handlers=java.util.logging

log4j's configuration

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问题 I want to config my logging system based on slf4j and log4j . I want to log all messages from com.A class. And only those messages. so I wrote in my config file log4j.rootLogger=FATAL, All log4j.rootLogger=DEBUG, A1 log4j.appender.A1=com.A log4j.appender.Console=org.apache.log4j.ConsoleAppender log4j.appender.Console.layout=org.apache.log4j.PatternLayout log4j.appender.Console.layout.conversionPattern=%m%n My runner (com.Start class) contains PropertyConfigurator.configure("log4j.properties")