This document provides an overview of logging in Java, focusing on the Log4j logging framework. It discusses logging concepts like log levels, appenders, and layouts. It then provides examples of configuring Log4j through properties files, including setting log levels and outputs. The document also presents examples of integrating Log4j in Java code through loggers and handling different log levels.
- SLF4J is a logging facade that allows switching between different logging implementations without code changes. Logback is one such implementation that can be used with SLF4J.
- Logback has advantages over Log4j like being more efficient and configurable via XML or code. It exposes its API through SLF4J.
- Logback's architecture consists of core, classic and access modules. Classic extends core and implements SLF4J. Access integrates with web servers.
- Logback uses appenders to write logs, encoders to format outputs, and layouts to define formats. Filters control which logs to output.
LOG4j allows the developer to control which log statements are output with arbitrary granularity. It is fully configurable at runtime using external configuration files.
Logging frameworks allow developers to capture log information at different levels of detail. They consist of loggers to capture information, handlers to publish logs to destinations, and formatters to structure log outputs. Common logging levels include DEBUG, INFO, WARN, and ERROR. Choosing the right logging level and messages is important to balance detail with performance. Log4j is often the framework of choice, though SLF4J provides a common API for different logging implementations. Proper configuration and best practices help ensure effective and efficient logging.
This document provides an overview of Spring Security including:
I. It distinguishes Spring Framework, Spring Boot, and Spring Security and their relationships.
II. It defines Spring Security as a framework focusing on authentication and authorization for Java applications.
III. It outlines some of the core concepts in Spring Security such as Principal, Authentication, Authorization, GrantedAuthority etc.
The document serves as an introduction to Spring Security fundamentals and architecture.
This document discusses Aspect Oriented Programming (AOP) using the Spring Framework. It defines AOP as a programming paradigm that extends OOP by enabling modularization of crosscutting concerns. It then discusses how AOP addresses common crosscutting concerns like logging, validation, caching, and transactions through aspects, pointcuts, and advice. It also compares Spring AOP and AspectJ, and shows how to implement AOP in Spring using annotations or XML.
- SLF4J is a logging facade that allows switching between different logging implementations without code changes. Logback is one such implementation that can be used with SLF4J.
- Logback has advantages over Log4j like being more efficient and configurable via XML or code. It exposes its API through SLF4J.
- Logback's architecture consists of core, classic and access modules. Classic extends core and implements SLF4J. Access integrates with web servers.
- Logback uses appenders to write logs, encoders to format outputs, and layouts to define formats. Filters control which logs to output.
LOG4j allows the developer to control which log statements are output with arbitrary granularity. It is fully configurable at runtime using external configuration files.
Logging frameworks allow developers to capture log information at different levels of detail. They consist of loggers to capture information, handlers to publish logs to destinations, and formatters to structure log outputs. Common logging levels include DEBUG, INFO, WARN, and ERROR. Choosing the right logging level and messages is important to balance detail with performance. Log4j is often the framework of choice, though SLF4J provides a common API for different logging implementations. Proper configuration and best practices help ensure effective and efficient logging.
This document provides an overview of Spring Security including:
I. It distinguishes Spring Framework, Spring Boot, and Spring Security and their relationships.
II. It defines Spring Security as a framework focusing on authentication and authorization for Java applications.
III. It outlines some of the core concepts in Spring Security such as Principal, Authentication, Authorization, GrantedAuthority etc.
The document serves as an introduction to Spring Security fundamentals and architecture.
This document discusses Aspect Oriented Programming (AOP) using the Spring Framework. It defines AOP as a programming paradigm that extends OOP by enabling modularization of crosscutting concerns. It then discusses how AOP addresses common crosscutting concerns like logging, validation, caching, and transactions through aspects, pointcuts, and advice. It also compares Spring AOP and AspectJ, and shows how to implement AOP in Spring using annotations or XML.
The java persistence API provides a specification for persisting, reading, and managing data from your java object to your relational tables in the database. JPA specifies the set of rules and guidelines for developing interfaces that follow standards.
Spring Data is a high level SpringSource project whose purpose is to unify and ease the access to different kinds of persistence stores, both relational database systems and NoSQL data stores.
The document provides an overview and introduction to Spring Data JPA, including:
1) How Spring Data abstracts away basic data management concepts and supports both relational and non-relational databases.
2) An example of refactoring from plain JPA to Spring Data JPA by defining a repository interface and using built-in query methods.
3) How the Spring Data repository abstraction reduces the effort to implement data access layers through interfaces like Repository.
The document discusses OAuth2 and Spring Security. It provides an overview of OAuth2 concepts including the four main roles (resource owner, resource server, client, and authorization server), four common grant types (authorization code, implicit, resource owner password credentials, and client credentials), and how to implement OAuth2 flows in Spring Security. Sample OAuth2 applications using Spring Security are also mentioned.
My slides for understanding Pentesting for GraphQL Applications. I presented this content at c0c0n and bSides Delhi 2018. Also contains details of my Burp Extension for GraphQL parsing and scanning located here https://github.com/br3akp0int/GQLParser
Action Jackson! Effective JSON processing in Spring Boot ApplicationsJoris Kuipers
JSON processing plays an important role in nearly all applications nowadays, and Jackson is the de-facto standard library for that. Most developers are therefore familiar with using it for simple (un)marshalling purposes, but never go beyond the basics. In this session Joris will show how to effectively configure and use Jackson, focusing on Spring Boot applications. Boot provides a lot of support for configuring ObjectMappers, which you can use directly but are also used internally by the framework for e.g. handling HTTP requests/responses or message conversion. Topics will include tuning mappings, using modules, applying views and using alternative parsing options like JSON Pointer and JsonPath, all illustrated through live demos. Don’t miss out on this presentation and become an Action Jackson yourself!
The document discusses the Lightweight Directory Access Protocol (LDAP) which provides a method for accessing and updating directory services based on the X.500 model. It describes LDAP's lightweight alternative approach compared to X.500, how information is structured and named in an LDAP directory, the functional operations that can be performed, security considerations, and how the protocol is encoded for transmission.
Project Lombok is a java library that automatically plugs into your editor and build tools, spicing up your java.Never write another getter or equals method again.
After watching this you will be able to give answer on following Questions
What is lombok?
Why to use project Lombok?
How to integrate/plug lombok project jar with you Eclipse ID?
How to use lombok maven project?
What is @Getter/@Setter annotation in Lombok java?
How Project Lombok works?
What is @NonNull annotation?
What is @ToString annotation?
How to generate Equals and Hashcode using Lombok?
Check all lombok java example
What are the benefits/advantages of using lombok?
Hibernate is an object-relational mapping tool for Java that allows developers to persist Java objects to a relational database in a transparent way. It provides transparent persistence without needing to flatten objects or write database specific code. Hibernate uses an object-oriented query language that closely resembles SQL to retrieve and manipulate persisted objects.
iOS Application Penetration Testing for BeginnersRyanISI
This document provides an overview of iOS application penetration testing for beginners. It covers setting up a pen testing environment, understanding the iOS filesystem and Objective-C runtime, techniques for runtime analysis and manipulation, insecure data storage, side channel data leakage, analyzing URL schemes and network traffic, and secure coding guidelines. The agenda includes jailbreaking a device, installing useful tools like Cycript and class-dump, understanding the application sandbox and filesystem structure, runtime concepts in Objective-C, manipulating running applications using Cycript, insecure storage techniques like plist and NSUserDefaults, side channels like logs, snapshots and pasteboard, URL schemes, and analyzing network traffic using a proxy like Burp.
Code review is, hopefully, part of regular development practices for any organization. Adding security elements to code review can be the most effective measure in preventing vulnerabilities, very early in the development lifecycle, even before the first commit. This is an interactive presentation which will contain the basic elements to get you started. The audience will help review more than a dozen software examples in order to figure out the good from the ugly. The software examples are based on OWASP Top 10 and SANS Top 25 favourites such as Injection, Memory Flaws, Sensitive Data Exposure, Cross-Site Scripting and Broken Access Control.
Spring Boot is an open source Java-based framework that makes it easy to create stand-alone, production-grade Spring based Applications. It provides features such as embedded HTTP servers, externalized configuration, and metrics. Spring Boot uses auto-configuration and starters to minimize configuration work. The main intention of Spring Boot starters is to combine common dependencies into single dependencies to simplify dependency management. Spring Boot also provides auto-configuration to avoid explicit configuration of components like views and ViewResolvers.
This document provides an introduction and overview of Node.js and MongoDB. It discusses that Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine that uses an event-driven, non-blocking I/O model. It can be used for real-time applications and is well-suited for I/O-intensive applications. MongoDB is also introduced as a popular JSON-based NoSQL database that can be easily used with Node.js applications. Examples are given for connecting to MongoDB from Node.js code.
Defending against Java Deserialization VulnerabilitiesLuca Carettoni
Java deserialization vulnerabilities have recently gained popularity due to a renewed interest from the security community. Despite being publicly discussed for several years, a significant number of Java based products are still affected. Whenever untrusted data is used within deserialization methods, an attacker can abuse this simple design anti-pattern to compromise your application. After a quick introduction of the problem, this talk will focus on discovering and defending against deserialization vulnerabilities. I will present a collection of techniques for mitigating attacks when turning off object serialization is not an option, and we will discuss practical recommendations that developers can use to help prevent these attacks.
Understanding the Android System ServerOpersys inc.
This document discusses the Android system server. It provides an overview of the bootup sequence where the system server is started. It then describes some of the key services run by the system server, such as the activity manager, package manager, window manager, and others. It also discusses how to observe the system server in action using logcat and how applications interface with system services via Binder.
The Log4Shell Vulnerability – explained: how to stay secureKaspersky
On December 9th, researchers uncovered a zero-day critical vulnerability in the Apache Log4j library used by millions of Java applications. CVE-2021-44228 or “Log4Shell” is a RCE vulnerability that allows attackers to execute arbitrary code and potentially take full control over an infected system. The vulnerability has been ranked a 10/10 on the CVSSv3 severity scale.
While the Apache Foundation has already released a patch for this CVE, it can take weeks or months for vendors to update their software, and there are already widespread scans being conducted by malicious attackers to exploit Log4Shell.
What should companies or organizations do?
Join Marco Preuss, Head of Europe’s Global Research and Analysis (GReAT) team, Marc Rivero and Dan Demeter, Senior Security Researchers with GReAT, for an in-depth discussion on Log4Shell and a live Q&A session.
To see the full webinar, please visit: https://securelist.com/webinars/log4shell-vulnerability-how-to-stay-secure/?utm_source=Slideshare&utm_medium=partner&utm_campaign=gl_jespo_je0066&utm_content=link&utm_term=gl_Slideshare_organic_s966w1tou5a0snh
1) The document summarizes the plot of the movie "Pay It Forward." It introduces the main characters Trevor, an 11-year-old boy, and his teacher Mr. Simmons.
2) Trevor comes up with an idea called "Pay It Forward" where people do favors for three other people instead of paying back a single favor. This idea starts to spread through the community.
3) Unfortunately, Trevor dies trying to protect his friend, but his idea continues to positively impact others. His death is a tragedy, but his message of paying kindness forward lives on.
The java persistence API provides a specification for persisting, reading, and managing data from your java object to your relational tables in the database. JPA specifies the set of rules and guidelines for developing interfaces that follow standards.
Spring Data is a high level SpringSource project whose purpose is to unify and ease the access to different kinds of persistence stores, both relational database systems and NoSQL data stores.
The document provides an overview and introduction to Spring Data JPA, including:
1) How Spring Data abstracts away basic data management concepts and supports both relational and non-relational databases.
2) An example of refactoring from plain JPA to Spring Data JPA by defining a repository interface and using built-in query methods.
3) How the Spring Data repository abstraction reduces the effort to implement data access layers through interfaces like Repository.
The document discusses OAuth2 and Spring Security. It provides an overview of OAuth2 concepts including the four main roles (resource owner, resource server, client, and authorization server), four common grant types (authorization code, implicit, resource owner password credentials, and client credentials), and how to implement OAuth2 flows in Spring Security. Sample OAuth2 applications using Spring Security are also mentioned.
My slides for understanding Pentesting for GraphQL Applications. I presented this content at c0c0n and bSides Delhi 2018. Also contains details of my Burp Extension for GraphQL parsing and scanning located here https://github.com/br3akp0int/GQLParser
Action Jackson! Effective JSON processing in Spring Boot ApplicationsJoris Kuipers
JSON processing plays an important role in nearly all applications nowadays, and Jackson is the de-facto standard library for that. Most developers are therefore familiar with using it for simple (un)marshalling purposes, but never go beyond the basics. In this session Joris will show how to effectively configure and use Jackson, focusing on Spring Boot applications. Boot provides a lot of support for configuring ObjectMappers, which you can use directly but are also used internally by the framework for e.g. handling HTTP requests/responses or message conversion. Topics will include tuning mappings, using modules, applying views and using alternative parsing options like JSON Pointer and JsonPath, all illustrated through live demos. Don’t miss out on this presentation and become an Action Jackson yourself!
The document discusses the Lightweight Directory Access Protocol (LDAP) which provides a method for accessing and updating directory services based on the X.500 model. It describes LDAP's lightweight alternative approach compared to X.500, how information is structured and named in an LDAP directory, the functional operations that can be performed, security considerations, and how the protocol is encoded for transmission.
Project Lombok is a java library that automatically plugs into your editor and build tools, spicing up your java.Never write another getter or equals method again.
After watching this you will be able to give answer on following Questions
What is lombok?
Why to use project Lombok?
How to integrate/plug lombok project jar with you Eclipse ID?
How to use lombok maven project?
What is @Getter/@Setter annotation in Lombok java?
How Project Lombok works?
What is @NonNull annotation?
What is @ToString annotation?
How to generate Equals and Hashcode using Lombok?
Check all lombok java example
What are the benefits/advantages of using lombok?
Hibernate is an object-relational mapping tool for Java that allows developers to persist Java objects to a relational database in a transparent way. It provides transparent persistence without needing to flatten objects or write database specific code. Hibernate uses an object-oriented query language that closely resembles SQL to retrieve and manipulate persisted objects.
iOS Application Penetration Testing for BeginnersRyanISI
This document provides an overview of iOS application penetration testing for beginners. It covers setting up a pen testing environment, understanding the iOS filesystem and Objective-C runtime, techniques for runtime analysis and manipulation, insecure data storage, side channel data leakage, analyzing URL schemes and network traffic, and secure coding guidelines. The agenda includes jailbreaking a device, installing useful tools like Cycript and class-dump, understanding the application sandbox and filesystem structure, runtime concepts in Objective-C, manipulating running applications using Cycript, insecure storage techniques like plist and NSUserDefaults, side channels like logs, snapshots and pasteboard, URL schemes, and analyzing network traffic using a proxy like Burp.
Code review is, hopefully, part of regular development practices for any organization. Adding security elements to code review can be the most effective measure in preventing vulnerabilities, very early in the development lifecycle, even before the first commit. This is an interactive presentation which will contain the basic elements to get you started. The audience will help review more than a dozen software examples in order to figure out the good from the ugly. The software examples are based on OWASP Top 10 and SANS Top 25 favourites such as Injection, Memory Flaws, Sensitive Data Exposure, Cross-Site Scripting and Broken Access Control.
Spring Boot is an open source Java-based framework that makes it easy to create stand-alone, production-grade Spring based Applications. It provides features such as embedded HTTP servers, externalized configuration, and metrics. Spring Boot uses auto-configuration and starters to minimize configuration work. The main intention of Spring Boot starters is to combine common dependencies into single dependencies to simplify dependency management. Spring Boot also provides auto-configuration to avoid explicit configuration of components like views and ViewResolvers.
This document provides an introduction and overview of Node.js and MongoDB. It discusses that Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine that uses an event-driven, non-blocking I/O model. It can be used for real-time applications and is well-suited for I/O-intensive applications. MongoDB is also introduced as a popular JSON-based NoSQL database that can be easily used with Node.js applications. Examples are given for connecting to MongoDB from Node.js code.
Defending against Java Deserialization VulnerabilitiesLuca Carettoni
Java deserialization vulnerabilities have recently gained popularity due to a renewed interest from the security community. Despite being publicly discussed for several years, a significant number of Java based products are still affected. Whenever untrusted data is used within deserialization methods, an attacker can abuse this simple design anti-pattern to compromise your application. After a quick introduction of the problem, this talk will focus on discovering and defending against deserialization vulnerabilities. I will present a collection of techniques for mitigating attacks when turning off object serialization is not an option, and we will discuss practical recommendations that developers can use to help prevent these attacks.
Understanding the Android System ServerOpersys inc.
This document discusses the Android system server. It provides an overview of the bootup sequence where the system server is started. It then describes some of the key services run by the system server, such as the activity manager, package manager, window manager, and others. It also discusses how to observe the system server in action using logcat and how applications interface with system services via Binder.
The Log4Shell Vulnerability – explained: how to stay secureKaspersky
On December 9th, researchers uncovered a zero-day critical vulnerability in the Apache Log4j library used by millions of Java applications. CVE-2021-44228 or “Log4Shell” is a RCE vulnerability that allows attackers to execute arbitrary code and potentially take full control over an infected system. The vulnerability has been ranked a 10/10 on the CVSSv3 severity scale.
While the Apache Foundation has already released a patch for this CVE, it can take weeks or months for vendors to update their software, and there are already widespread scans being conducted by malicious attackers to exploit Log4Shell.
What should companies or organizations do?
Join Marco Preuss, Head of Europe’s Global Research and Analysis (GReAT) team, Marc Rivero and Dan Demeter, Senior Security Researchers with GReAT, for an in-depth discussion on Log4Shell and a live Q&A session.
To see the full webinar, please visit: https://securelist.com/webinars/log4shell-vulnerability-how-to-stay-secure/?utm_source=Slideshare&utm_medium=partner&utm_campaign=gl_jespo_je0066&utm_content=link&utm_term=gl_Slideshare_organic_s966w1tou5a0snh
1) The document summarizes the plot of the movie "Pay It Forward." It introduces the main characters Trevor, an 11-year-old boy, and his teacher Mr. Simmons.
2) Trevor comes up with an idea called "Pay It Forward" where people do favors for three other people instead of paying back a single favor. This idea starts to spread through the community.
3) Unfortunately, Trevor dies trying to protect his friend, but his idea continues to positively impact others. His death is a tragedy, but his message of paying kindness forward lives on.
The document provides tips on how to halve advertising costs and increase profits by measuring current marketing efforts, analyzing results, and testing variations. It recommends tracking where customers come from using different contact details for each ad. Once current performance is measured, tests can begin by making small changes to ads, like adjusting headlines, offers, or design elements, to find higher-performing versions. Continual testing of minor variations can improve response rates and profits over time while reducing costs by identifying underperforming marketing.
The document compares and contrasts two educational artefacts - Artefact 2 and Artefact 8. Artefact 2 focuses on the important topic of drugs and provides multiple perspectives and activities for students. It allows students to participate in debates, discussions, and write reports. Artefact 8 does not provide any important information or opportunities for students to show understanding. It only involves basic math skills of plotting points on a graph. The author believes Artefact 2 is more useful for teaching students as it connects to real-world issues, provides guidance for writing reports, and allows non-linear navigation. Elements from Artefact 2, like multi-leveled activities and scaffolding, will inform the author's own educational project.
This document summarizes different source control tools and models, and provides an introduction to Git. It discusses the history of file servers, CVS, VSS, and TFS. It then covers source control models including the repository model, and challenges like multiple authors editing the same files. It describes the lock-modify-unlock and copy-modify-merge solutions, and how Git uses the latter approach. Finally, it discusses setting up a Git client and creating a new Git repository.
Green-Fax offers a faxing solution that is more efficient and environmentally friendly than traditional fax machines. Their fax-to-email and email-to-fax services allow users to send and receive faxes via email rather than using paper and ink. Setting up either service takes simple steps and can be completed within 24 hours. Green-Fax costs just £50 per year for one email account, saving users money compared to costs of fax machines and phone lines.
Gabriela is a 17-year-old student who enjoys happy moments with friends but can be grumpy in difficult situations. She aims to study gastronomy in college next year and hopes to finish her degree in 5 years to find a job, possibly in cake or pastry making. Long term, she wants to get married within 8 years and has family support and opportunities to achieve her goals.
This document describes AdTracker® and TrackerPlus+TM services that track the success of advertising by assigning unique tracking numbers to different advertising media. This allows businesses to see which ads generate the most calls and optimize spending. AdTracker® costs £50 per year plus VAT and provides online stats on calls. TrackerPlus+TM, which additionally emails details of missed calls, costs £80 per year plus VAT. Both services aim to help businesses improve advertising ROI.
This document provides a brief overview of the city of Chicago, Illinois, highlighting some of its key landmarks and features. It notes that Chicago has around 2.8 million residents and is located on Lake Michigan. Some of the sites mentioned include Lake Shore Drive, Buckingham Fountain, the Sears Tower, the Spiral Building, Millennium Park, Soldier Field stadium, and the Chicago River. It concludes with the author's name and location.
Green-Fax offers a faxing solution that is more efficient and environmentally friendly than traditional fax machines. Their fax-to-email and email-to-fax services allow users to send and receive faxes via email rather than using paper and ink. Setting up either service takes simple steps and can be completed within 24 hours. Green-Fax costs just £50 per year for one email account, saving users money compared to costs of fax machines and phone lines.
The document outlines a proposed user research process at Hilti Hungary to better understand customers and improve communication of added value. It involves defining a challenge, researching the sector and competitors, mapping stakeholders and experiencing Hilti's services through shadowing, interviews and collaborating with agents, customers and users. The goal is to build customer personas, gain insights through workshops and define challenges to synthesize learnings that can enhance Hilti's value proposition and availability to potential customers.
Lotus Collaboration by Le Thanh Quang in CT Thuy_Dang
The document discusses various collaborative software tools from Lotus, including:
1. LotusLive, a suite of cloud-based collaboration services including communities, activities, events, and files sharing capabilities.
2. Lotus Notes, a collaborative software that helped the City of Forest Park Police Services Department reduce storage capacity by 77% and avoid costs of a large storage system.
3. Lotus collaboration tools like communities, activities, events, and file sharing services that allow sharing information among project teams and connecting people with common interests or expertise.
The document discusses exceptions in Java. It defines exceptions as errors that occur during program execution. The exception hierarchy is presented, dividing exceptions into checked, unchecked (which include errors), and runtime exceptions. Exception handling using try/catch blocks is explained along with the throws and throw statements. Creating custom exceptions by extending the Exception or RuntimeException classes is covered. Finally, examples of handling multiple exceptions and exception specifications in method signatures are provided.
HCD involves investigating social problems, analyzing knowledge, engaging users, and iterating solutions. It focuses on users to gain insights and learn about their needs in order to create positive impact. Design thinking is a human-centered method for creative problem solving and innovation that can drive the five biggest innovations this century: transportation, healthcare, collaboration, aging, and mainstreaming for disabilities.
Unit testing and integration testing are software testing techniques. Unit testing involves validating individual units or components of code work properly. Integration testing involves combining units and testing them together to find interface defects. An example integration test scenario described combining database scripts, application code, and GUI components developed separately into one system and verifying the interfaces. TestNG is a testing framework that supports features like dependency testing, grouping tests, and parameterization to make testing more powerful than JUnit.
This document discusses logging frameworks and the Log4E Eclipse plugin. It provides an overview of why logging is useful, how Log4E supports different logging frameworks like Log4J and adds logging code automatically. It also gives instructions on downloading, configuring and using Log4J for logging within a Java application created in Eclipse.
Logging is essential for debugging applications and monitoring what is happening. The document discusses different logging frameworks like Log4j, Logback, and SLF4J. SLF4J acts as a facade and allows plugging in different logging frameworks. Log4j is commonly used and configuration involves setting log levels and output destinations. Examples demonstrate basic usage of Log4j for logging information and errors.
Like it or not, many open source developers are moving to the Microsoft .NET platform, and we're bringing our favorite tools with us!
In this session, we look inside ASF projects that are creating software for .NET and Mono, like Logging and Lucene.net -- to show you how to create leading-edge ASP.NET applications with ASF open source libraries, and how you can integrate with other appications using Thrift, Chemistry/DotCMIS, QPid or ActiveMQ.
We'll also look at integrating other .NET open source projects, like Spring.NET, NVelocity, and JayRock, into your C# application to create a complete open source .NET stack.
This document discusses logging best practices and compares different .NET logging frameworks like log4net, NLog, and Serilog. It recommends using Serilog for its simpler API and support for structured logging. Structured logging stores log data in JSON format for easier parsing and querying. Seq is introduced as a log management platform that supports structured logs and has tools for filtering, analyzing, and alerting on logs. The document demonstrates logging an object to Seq using Serilog's structured logging features.
This document provides information about configuring Log4j logging framework. It discusses setting up Log4j with email, file and stdout appenders. It compares XML and properties configuration files and shows how to change log levels for a running application. The document explains best practices for logging and exception handling. It provides details on the log4j.properties file, log4j XML configuration, log levels, appenders, layouts and conversion patterns.
This document discusses ways to optimize logging by centralizing and proactively using log data. It recommends using Monolog to log from application code in a standardized format. Rsyslog can then collect logs centrally from applications and systems. Logstash can further process logs with filters and output them to destinations like Elasticsearch. Graylog2 provides a web interface for powerful log searching, analytics, and alerting. Centralizing, standardizing, and proactively analyzing logs with these open source tools allows for improved monitoring and troubleshooting.
Application Logging in the 21st century - 2014.keyTim Bunce
Slides for my talk at the Austrian Perl Workshop in Salzburg on October 10th.
A video of the talk can be found at https://www.youtube.com/watch?v=4Qj-_eimGuE
In this deck, I quickly summarize how people have dealt with logging in Docker historically and then describe a comprehensive approach to logging and monitoring in Docker, based on research and customer interviews.
While Docker adds a welcome layer of abstraction to the deployment of applications, it also challenges assumptions on how those applications should be managed. I discuss a comprehensive approach for collecting logs and metrics into a centralized platform and dissect the latest additions to Docker itself (log drivers, stats).
Logback is a logging framework for Java that consists of three modules: logback-core, logback-classic, and logback-access. Logback-classic builds upon logback-core to provide logging services for most popular logging frameworks like SLF4J. It uses Loggers, Appenders, and Layouts where Loggers generate log information, Appenders write log data to destinations, and Layouts specify the format of the log output. Logback reads configuration files like logback.xml to configure loggers, appenders, and logging levels. Common appenders include ConsoleAppender for console output and FileAppender for file output.
The document discusses exception handling and logging in Java. It describes the exception class hierarchy in Java, the different types of exceptions (checked and unchecked), and how to catch and handle exceptions using try/catch blocks. It also covers creating custom exception classes, re-throwing exceptions, and using try-with-resources to manage resources. For logging, it introduces SLF4J as a logging facade and log4j as a popular logging framework. Log4j uses loggers, appenders, and layouts to log messages at different levels to various outputs.
The document provides an overview of the PNotifyAppender, which is an appender that sends log messages as instant messages using GTalk. It stores log events in an internal cyclic buffer and sends them as an IM when a triggering condition is met, such as an error-level event. It uses the Smack API to connect to GTalk and relies on a username, password, recipient address, and other properties to operate. The appender aims to provide real-time notification of exceptions to system administrators via an IM client.
Log4net is a tool for logging statements to various outputs. It is based on the popular log4j framework and ports it to the .NET runtime. Log4net allows output to multiple targets like databases, files, and consoles. It is configured using an XML file and has a proven architecture based on log4j.
This document discusses the Log4E logging plugin, which automates the addition of logging code to Java programs. It supports several logging frameworks, including Log4J. The plugin inserts log statements at the start and end of methods and for variables. While it does not provide a logging framework itself, it helps configure Log4J by generating a sample log4j.properties configuration file. The document demonstrates using Log4E and Log4J to add logging to a sample Java application.
This is a presentation that identifies the various components of the 11i technology stack and how to generate log files for them for troubleshooting and debugging.
This document discusses various options for centralized logging, including using syslog, Monolog, and logging software like Graylog. It provides examples of logging from PHP, MySQL, and Apache to a remote syslog server using Monolog and a FIFO pipe. Centralized logging with a software like Graylog allows for unified logging, search, alerts and reporting across multiple systems.
SLF4J and Logback are next generation logging frameworks that were designed to improve upon previous logging tools like log4j. Logback is faster and more reliable than older tools, and implements SLF4J natively so there is no performance overhead. Logback supports features like automatic reloading of configuration files, MDC for contextual logging, and flexible filters. It provides best practices for structured logging compared to previous generations of logging tools.
SLF4J and Logback are next generation logging frameworks that were designed to improve upon previous logging tools like log4j. Logback is faster and more reliable than older tools, and implements SLF4J natively so there is no performance overhead. Logback supports features like automatic reloading of configuration files, MDC for contextual logging, and flexible filters. It provides best practices for structured logging compared to previous generations of logging tools.
SLF4J and Logback are next generation logging frameworks that were designed to improve upon previous logging tools like log4j. Logback is faster and more reliable than older tools, and implements SLF4J natively so there is no performance overhead. Logback supports features like automatic reloading of configuration files, MDC for contextual logging, and flexible filters. Together, SLF4J and Logback provide a powerful yet easy to use logging solution.
SLF4J and Logback are next generation logging frameworks that were designed to improve upon previous logging tools like log4j. Logback is faster and more reliable than older tools, and implements SLF4J natively so there is no performance overhead. Logback supports features like automatic reloading of configuration files, MDC for contextual logging, and flexible filters. It provides best practices for structured logging compared to previous generations of logging tools.
Most important New features of Oracle 23c for DBAs and Developers. You can get more idea from my youtube channel video from https://youtu.be/XvL5WtaC20A
Transform Your Communication with Cloud-Based IVR SolutionsTheSMSPoint
Discover the power of Cloud-Based IVR Solutions to streamline communication processes. Embrace scalability and cost-efficiency while enhancing customer experiences with features like automated call routing and voice recognition. Accessible from anywhere, these solutions integrate seamlessly with existing systems, providing real-time analytics for continuous improvement. Revolutionize your communication strategy today with Cloud-Based IVR Solutions. Learn more at: https://thesmspoint.com/channel/cloud-telephony
Unveiling the Advantages of Agile Software Development.pdfbrainerhub1
Learn about Agile Software Development's advantages. Simplify your workflow to spur quicker innovation. Jump right in! We have also discussed the advantages.
When it is all about ERP solutions, companies typically meet their needs with common ERP solutions like SAP, Oracle, and Microsoft Dynamics. These big players have demonstrated that ERP systems can be either simple or highly comprehensive. This remains true today, but there are new factors to consider, including a promising new contender in the market that’s Odoo. This blog compares Odoo ERP with traditional ERP systems and explains why many companies now see Odoo ERP as the best choice.
What are ERP Systems?
An ERP, or Enterprise Resource Planning, system provides your company with valuable information to help you make better decisions and boost your ROI. You should choose an ERP system based on your company’s specific needs. For instance, if you run a manufacturing or retail business, you will need an ERP system that efficiently manages inventory. A consulting firm, on the other hand, would benefit from an ERP system that enhances daily operations. Similarly, eCommerce stores would select an ERP system tailored to their needs.
Because different businesses have different requirements, ERP system functionalities can vary. Among the various ERP systems available, Odoo ERP is considered one of the best in the ERp market with more than 12 million global users today.
Odoo is an open-source ERP system initially designed for small to medium-sized businesses but now suitable for a wide range of companies. Odoo offers a scalable and configurable point-of-sale management solution and allows you to create customised modules for specific industries. Odoo is gaining more popularity because it is built in a way that allows easy customisation, has a user-friendly interface, and is affordable. Here, you will cover the main differences and get to know why Odoo is gaining attention despite the many other ERP systems available in the market.
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Sven will talk about Atlassian’s journey from a monolith to a multi-tenanted architecture and how it affected the way the engineering teams work. You will learn how we shifted to service ownership, moved to more autonomous teams (and its challenges), and established platform and enablement teams.
Hand Rolled Applicative User ValidationCode KataPhilip Schwarz
Could you use a simple piece of Scala validation code (granted, a very simplistic one too!) that you can rewrite, now and again, to refresh your basic understanding of Applicative operators <*>, <*, *>?
The goal is not to write perfect code showcasing validation, but rather, to provide a small, rough-and ready exercise to reinforce your muscle-memory.
Despite its grandiose-sounding title, this deck consists of just three slides showing the Scala 3 code to be rewritten whenever the details of the operators begin to fade away.
The code is my rough and ready translation of a Haskell user-validation program found in a book called Finding Success (and Failure) in Haskell - Fall in love with applicative functors.
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Drona Infotech is one of the Best Mobile App Development Company In Noida Maintenance and ongoing support. mobile app development Services can help you maintain and support your app after it has been launched. This includes fixing bugs, adding new features, and keeping your app up-to-date with the latest
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UI5con 2024 - Keynote: Latest News about UI5 and it’s EcosystemPeter Muessig
Learn about the latest innovations in and around OpenUI5/SAPUI5: UI5 Tooling, UI5 linter, UI5 Web Components, Web Components Integration, UI5 2.x, UI5 GenAI.
Recording:
https://www.youtube.com/live/MSdGLG2zLy8?si=INxBHTqkwHhxV5Ta&t=0
UI5con 2024 - Boost Your Development Experience with UI5 Tooling ExtensionsPeter Muessig
The UI5 tooling is the development and build tooling of UI5. It is built in a modular and extensible way so that it can be easily extended by your needs. This session will showcase various tooling extensions which can boost your development experience by far so that you can really work offline, transpile your code in your project to use even newer versions of EcmaScript (than 2022 which is supported right now by the UI5 tooling), consume any npm package of your choice in your project, using different kind of proxies, and even stitching UI5 projects during development together to mimic your target environment.
4. Loggin Oveview
▪ Logging is the process of writing log messages during the
execution of a program to a central place.
▪ This logging allows you to report and persist error and
warning messages as well as info messages (e.g., runtime
statistics) so that the messages can later be retrieved and
analyzed.
▪ The object which performs the logging in applications is
typically just called Logger.
5. Loggin Oveview
▪ To create a logger in your Java code, you can use the following
snippet.
import java.util.logging.Logger;
… … …
// Assumes the current class is called logger
private final static Logger LOGGER =
Logger.getLogger(MyClass.class.getName());
▪ The Logger you create is actually a hierarchy of Loggers, and
a . (dot) in the hierarchy indicates a level in the hierarchy.
7. Log4j Introduction
▪ Log4j initially developed in the framework of "Apache Jakarta
Project".
▪ Separated into a journaling project.
▪ Has been the de facto standard.
▪ Apache log4j is a Java-based logging utility.
▪ The log4j team has created a successor to log4j with version
number 2.0.
▪ log4j 2.0 was developed with a focus on the problems of log4j
1.2, 1.3.
▪ You can define three main components:
– Loggers, Appenders and Layouts.
8. Simplest Example
package com.softserve.edu;
import org.apache.log4j.Logger;
public class App {
public static final Logger LOG =
Logger.getLogger(App.class);
public static void main(String[] args) {
System.out.println("The Start");
LOG.info("Hello World!");
}
}
9. Loggin Oveview
▪ If the program is run
log4j:WARN No appenders could be found for
logger (com.softserve.edu.App).
log4j:WARN Please initialize the log4j system
properly.
▪ There are three ways to configure log4j: with a properties file,
with an XML file and through Java code
▪ For example, configure log4j to output to the screen.
▪ Will be used configuration files of two types:
– log4j.properties and
– log4j.xml
11. Loggin Levels
▪ The following list defines the log levels and messages in log4j,
in decreasing order of severity
▪ OFF: The highest possible rank and is intended to turn off
logging.
▪ FATAL: Severe errors that cause premature termination. Expect
these to be immediately visible on a status console.
▪ ERROR: Other runtime errors or unexpected conditions.
Expect these to be immediately visible on a status console.
12. Loggin Levels
▪ WARN: Use of deprecated APIs, poor use of API, 'almost'
errors, other runtime situations that are undesirable or
unexpected, but not necessarily "wrong". Expect these to be
immediately visible on a status console.
▪ INFO: Interesting runtime events (startup/shutdown). Expect
these to be immediately visible on a console, so be
conservative and keep to a minimum.
▪ DEBUG: Detailed information on the flow through the system.
Expect these to be written to logs only.
▪ TRACE: Most detailed information. Expect these to be written
to logs only.
16. Appenders
▪ The actual outputs are done by Appenders.
▪ There are numerous Appenders available, with descriptive
names, such as
– FileAppender, ConsoleAppender, SocketAppender,
SyslogAppender, NTEventLogAppender and even
SMTPAppender.
▪ Multiple Appenders can be attached to any Logger, so it's
possible to log the same information to multiple outputs; for
example to a file locally and to a socket listener on another
computer.
17. Appenders
▪ org.apache.log4j.ConsoleAppender
– the most frequently used.
▪ org.apache.log4j.FileAppender
– writes messages to the file.
▪ org.apache.log4j.DailyRollingFileAppender
– creates a new file, add the year, month and day to the
name.
▪ org.apache.log4j.RollingFileAppender
– creates a new file when the specified size, adds to the file
name index, 1, 2, 3.
▪ org.apache.log4j.net.SMTPAppender
– sending e-mails.
19. Layouts
▪ An Appender uses a Layout to format a LogEvent into a form
that meets the needs of whatever will be consuming the log
event.
▪ In Log4j 1.x and Logback Layouts were expected to
transform an event into a String.
▪ In Log4j 2 Layouts return a byte array.
▪ This allows the result of the Layout to be useful in many more
types of Appenders.
20. PatternLayout
▪ %d{ABSOLUTE}
– Displays time; ABSOLUTE – in format HH:mm:ss,SSS
▪ %5p
– Displays the log level (ERROR, DEBUG, INFO, etc.); use 5
characters, the rest padded with spaces;
▪ %t
– Displays the name of the thread;
▪ %c{1}
– class name with the package (indicates how many levels to
display);
21. PatternLayout
▪ %M
– The method name;
▪ %L
– Line number;
▪ %m
– Message that is sent to the log;
▪ %n
– Newline.
▪ %highlight{pattern}{style}
– Adds ANSI colors to the result of the enclosed pattern
based on the current event's logging level.
– %highlight{%d [%t]}
25. Output Settings
▪ Output in the log for specific classes and packages
log4j.logger.<PACKAGE_NAME>=<LEVEL>
log4j.logger.<PACKAGE_NAME>.<CLASS_NAME>=
<LEVEL>, <LOGGER_NAME>
▪ How to write the log;
– Specify for the package and class,
– usage level, additional appender
28. Case studies
package com.softserve.edu;
import com.softserve.training.Calc;
import com.softserve.training.Some;
public class App {
public static final Logger logger =
Logger.getLogger(App.class); // LoggerFactory
public static void main(String[] args) {
System.out.println("Hello from App:");
App app = new App();
Calc calc = new Calc();
Some some = new Some();
30. Case studies
package com.softserve.training;
import com.softserve.edu.App;
public class Calc {
public static final Logger logger =
Logger.getLogger(Calc.class); // LoggerFactory
public void calcMethod() {
logger.error("Calc Error");
logger.warn("Calc Warning");
logger.info("Calc Info");
logger.debug("Calc Debug");
}
}
31. Case studies
package com.softserve.training;
import com.softserve.edu.App;
public class Some {
public static final Logger logger =
Logger.getLogger(Some.class); // LoggerFactory
public void someMethod() {
logger.error("Some Error");
logger.warn("Some Warning");
logger.info("Some Info");
logger.debug("Some Debug");
}
}