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21 Most Important Java 8 VM Options for Servers (JVM parameters)
 
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In this video I explain some 21 JVM parameters which are suited for most server applications. If you have any questions, you can read those links below for more information or just ask in the comments section. You can find more infos reading following these links: - http://blog.sokolenko.me/2014/11/javavm-options-production.html - http://www.petefreitag.com/articles/gctuning/ - http://stas-blogspot.blogspot.de/2011/07/most-complete-list-of-xx-options-for.html You might also want to check out my blog at http://www.maknesium.com
Views: 5185 Maknesium.com
JVM and Tomcat optimisation - Singapore Spring User Group
 
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Speaker: Liu Dapeng, Java Tech Lead, PocketMath Dapeng works on a high scale environment with millions of requests every minute. He has worked a lot on performance in the past years and will share some of the most interesting optimisations he has worked on this year. Slides: https://docs.google.com/presentation/d/1zUS7vMv4y3RmAy_1mq695zKk7zyPETpTSsippO3WwrQ/edit?usp=docslist_api Event Page: http://www.meetup.com/singasug/events/227873656/ Produced by Engineers.SG Help us caption & translate this video! http://amara.org/v/WCeh/
Views: 1907 Engineers.SG
Debug JVM using JVisual VM | Heap Dump | Thread Dump | Profiling | Tech Primers
 
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This video covers how to use JVisual VM to see the heap dump, thread dump and profiling options of the JVM. Slack Community: https://techprimers.slack.com Twitter: https://twitter.com/TechPrimers Facebook: http://fb.me/TechPrimers GitHub: https://github.com/TechPrimers or https://techprimers.github.io/ Video Editing: iMovie Background Music: Broke For Free - Day Bird https://brokeforfree.bandcamp.com/track/day-bird The Passion HiFi - What We Came To Do Joakim Karud
Views: 8272 Tech Primers
Minecraft JVM Arguments and Optimization
 
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Overview of some basic JVM Arguments and how they can be used to maximize the resources on your PC for playing Minecraft. Link: https://www.minecraftforum.net/forums/support/unmodified-minecraft-client/tutorials-and-faqs/2882324-java-jvm-arguments-for-minecraft-java-edition =========================== Facebook: www.facebook.com/palmerglaytes/ Twitch: www.twitch.tv/palmerglaytes
Views: 6618 palmerg
Building and Tuning High Performance Java Platforms
 
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Recorded at SpringOne2GX 2015 Speaker: Emad Benjamin, VMWare Slides: http://www.slideshare.net/SpringCentral/building-and-tuning-high-performance-java-platforms This session will cover various GC tuning techniques and how to best build platform engineered systems; in particular the focus will be on tuning large scale JVM deployments. It is true that half of the world's Java applications have 2.x more hardware provisioned than what they really need, and 90% of these applications miss their SLA. In this session we showcase why this is the case, and demonstrate sizing techniques on how to platform engineer such systems without the need for over-provisioning and hence meeting SLA in a more feasible way. Come to this session to learn about GC tuning recipe that can give you the best configuration for latency sensitive applications. While predominantly most enterprise class Java workloads can fit into a scaled-out set of JVM instances of less than 4GB JVM heap, there are workloads in the in memory database space that require fairly large JVMs. We will look at various Java platform scales, some holding a few large JVMs of 90GB heap space, while other platforms are of thousands of JVM instances of less than 4GB heap space on each. We will also take a close look at an example XYZCars.com where a microservices approach was designed and deployed, we will talk through how to more correctly deploy microservices without out causing fragmentation of scale, and hence without impeding performance. In this session we take a deep dive into the issues and the optimal tuning configurations for tuning large JVMs in the range of 4GB to 360GB, using the GC tuning recipes that were gained over the past 15 years of GC tuning engagements. You should be able to walk away with the ability to commence a decent GC tuning exercise on your own. The session summarizes the techniques and the necessary JVM options needed to accomplish these complex tuning tasks, in addition to various virtualization best practices when dealing with such large Java systems. Naturally when tuning large scale JVM platforms, the underlying hardware tuning cannot be ignored, hence the session will take detour from the traditional GC tuning talks out there and dive into how you optimally size a platform for enhanced memory and CPU consumption.
Views: 15166 SpringDeveloper
Microservices for the Masses with Spring Boot, JHipster, and JWT by Matt Raible
 
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Microservices are all the rage and being deployed by many Java Hipsters. If you’re working on a large team that needs different release cycles for product components, microservices can be a blessing. If you’re working at your VW Restoration Shop and running its online store with your own software, having five services to manage and deploy can be a real pain. Share your knowledge and experience about microservices in this informative and code-heavy talk. We’ll use JHipster (a Yeoman generator) to create Angular + Spring Boot apps on separate instances with a unified front-end. I’ll also show you options for securing your API gateway and individual applications using JWT. Heroku, Kubernetes, Docker, ELK, Spring Cloud, Okta; there will be plenty of interesting demos to see! Matt Raible - Java Champion and Developer Advocate at Okta with a passion for skiing, mountain biking, VWs, and good 🍺. Driving a '66 21-window and a '90 Syncro. Made in Montana. @mraible on Twitter.
Views: 13990 Devoxx
How to set and increase java heap size on Windows 7
 
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In this video I tried to show how to set and increase java heap space on Windows 7. You can do it by specifying size with the runtime parameter on the java option in the control panel or by specifying the size in the VM argument on java Eclipse dynamically which works at runtime. However, if you want to make it persistent, you can make it from the clipse.ini file located in the Eclipse distribution directory. Just open the eclipse.ini file and scroll down to the bottom and specify the same argument which I have used in the video. Caution: don't increase heap size equal to the physical memory(RAM), otherwise your system might crash.
Views: 24897 Md. Rezaul Karim
Prometheus Monitoring for Java Web Applications w o Modifying Source Code by Fabian Stäber
 
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The Prometheus monitoring tool follows a white-box monitoring approach: Applications actively provide metrics about their internal state to the Prometheus server. In order to instrument an application with Prometheus metrics, you have to add a metrics library and call that library in the application's source code. However, DevOps teams do not always have the option to modify the source code of the applications they are running. This talk shows how to instrument Java Web Applications with Prometheus metrics without modifying the application's source code. The implementation uses a variety of lesser-known but useful JVM features and libraries: Java agents, Bytecode manipulation with Byte Buddy, custom class loaders, reflection without loading class dependencies, thread locals, weak references, Docker for running application servers in integration tests. Browsing through the demo code we will learn some interesting facts about module systems in application servers and class loaders in general. # Fabian Stäber Dr. Fabian Stäber is software developer, research and development lead, consultant, architect, at ConSol Software GmbH in Munich, Germany. Fabian is excited about Java server development, distributed systems, operations, and monitoring. His academic research was on decentralized, peer-to-peer-based network architectures.
Views: 4741 Devoxx
Confinement in the JVM with John Rose @JohnRose00
 
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Confinement in the JVM with John Rose @JohnRose00. John Rose discussed confinement, abstractions, the history of logic, and design patterns. He also talks about projects Valhalla, Panama and Metropolis. http://openjdk.java.net/projects/valhalla/ http://openjdk.java.net/projects/panama/
Views: 2115 Java
Webinar: Spring Boot and Ratpack Web Framework
 
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Speaker: Danny Hyun Danny's notes: https://github.com/danhyun/spring-ratpack-2016 With the advent of Ratpack and Spring Boot, people think you need to choose between one or the other. That couldn’t be further from the truth. The only place where they overlap is in serving web requests. Spring Framework is a very rich ecosystem including but not limited to DI, web mvc, data, security, etc. Ratpack focuses on rapid web app prototyping and iteration balancing low resource utilization, high performance and developer friendliness. We’ll explore the ways in which Ratpack and Spring Boot work in harmony.
Views: 3055 SpringDeveloper
A lite Rx API for the JVM
 
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Recorded at SpringOne Platform 2016. Speakers: Sebastien Deleuze, Stephane Maldini Slides: http://www.slideshare.net/SpringCentral/a-lite-rx-api-for-the-jvm RxJava is a fully fledged and widely used solution to develop Reactive applications, but some interesting alternatives exist. After an overview of the main Reactive APIs available and of Spring Boot Reactive support, this workshop introduces how to develop Reactive applications using Reactor Core 2.5-a powerful and fast alternative. We will learn how to use Flux (N values) and Mono (single value) types with various exercises. This new API (which is the core of Reactor 2.5) is a game changer in the world of Reactive API on the JVM thanks to its Reactive eXtensions-based API (natively based on Reactive Streams and Java 8) and its unmatched performance.
Views: 2168 SpringDeveloper
Scaling Settings - Developing Scalable Apps with Java
 
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This video is part of an online course, Developing Scalable Apps with Java. Check out the course here: https://www.udacity.com/course/ud859.
Views: 254 Udacity
Java JVM memory model explained , heap vs off-heap
 
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In this section we will cover: int vs Integer, types sizes on disk, object sizes on disk, memory segments, Heap vs Off-Heap memory
Views: 1139 Mark Papis
Webinar: Getting Reactive with Spring Framework 5.0 GA
 
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Speakers: As a major revision of the core Spring Framework, 5.0 comes with a Java 8+ baseline and many infrastructure refinements: e.g. our own Commons Logging bridge autodetecting Log4j 2, SLF4J, JUL by default; streamlined use of Servlet 3.1+; and support for JUnit 5.0! Rest assured that the reactive focus does not impact the existing Spring MVC model; these options live alongside each other. Work continues on the traditional servlet-based Spring MVC stack; there are many further refinements across the framework. Join Juergen Hoeller, Rossen Stoyanchev, Stephane Maldini and the Spring Team to learn about: * Reactive programming: Spring WebFlux framework built on Reactor 3.1, with support for RxJava 2.1 and running on Tomcat, Jetty, Netty or Undertow. * Functional style with Java 8 & Kotlin: several API refinements and Kotlin extensions across the framework, in particular for bean registration and functional web endpoints. * Integration with Java EE 8 APIs: support for Servlet 4.0, Bean Validation 2.0, JPA 2.2, as well as the JSON Binding API (as an alternative to Jackson/Gson in Spring MVC). * JDK 9 support: fully aligned with JDK 9 at runtime, on the classpath as well as the module path (on the latter: as filename-based “automatic modules” for the time being). Attendees will also learn about the role of Project Reactor and its Reactive Streams foundation as the core reactive engine not only for Spring Framework, but increasingly across the Spring ecosystem. Spring Framework 5.0 adopters will benefit from an in-depth understanding of Project Reactor as they start using the 5.0 release.
Views: 5108 SpringDeveloper
Spring Batch Performance Tuning
 
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Recorded at SpringOne2GX 2014. Speakers: Gunnar Hillert, Chris Schaefer Data / Integration Track Slides: http://www.slideshare.net/SpringCentral/spring-batch-performance-tuning In this presentation we will examine various scalability options in order to improve the robustness and performance of your Spring Batch applications. We start out with a single threaded Spring Batch application that we will refactor so we can demonstrate how to run it using: * Concurrent Steps * Remote Chunking * AsyncItemProcessor and AsyncItemWriter * Remote Partitioning Additionally, we will show how you can deploy Spring Batch applications to Spring XD which provides high availability and failover capabilities. Spring XD also allows you to integrate Spring Batch applications with other Big Data processing needs.
Views: 6555 SpringDeveloper
Java Memory Model in 10 minutes
 
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What is a Java Memory Model? Watch the video to find out. More resources: https://2016.javazone.no/program/the-java-memory-model-made-easy https://shipilev.net/blog/2014/safe-public-construction/ https://www.cs.umd.edu/~pugh/java/memoryModel/jsr-133-faq.html https://docs.oracle.com/javase/specs/jls/se7/html/jls-17.html#jls-17.4
Views: 8120 Defog Tech
Core Java With OCJP/SCJP:JVM Architecture  Part- 5|| heap area || method area
 
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Deep Dive: Performance Tuning in Production
 
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With Richard Warburton, Kirk Pepperdine, James Gough & Sadiq Jaffer. Optimising Java - a brief tour of the JVM On release Java was slow but today it can give performance comparable to C++ and emit instructions more optimal than code that is statically compiled. But how does the JVM Optimise Java? We’ll take a tour of a simple code example, the journey to the JVM & the optimisations in between Moving to G1GC - An Experience Report With Java 9, the G1GC replaced the Parallel collector as default. The hype surrounding this change suggests that G1GC is the best collector ever. Let’s explore the reality, looking at experiences moving applications from CMS to G1GC in real production environments. The implications go beyond performance Production Profiling: What, Why and How You want to understand what an application is doing in production, but this information is often invisible. Profilers tell you what code your application is running but few developers profile and mostly on their development environments. Production profiling is now a practical reality that can help avoid performance problems Collaborative Performance Diagnostics See how your knowledge about the JVM, Garbage Collectors and Profiling can be combined to diagnose performance problems
Views: 598 Devoxx
Tuning Large Scale Java Platforms
 
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Recorded at SpringOne2GX 2014. Speakers: Emad Benjamin, Jamie O'Meara Slides: http://www.slideshare.net/SpringCentral/tuning-large-scale-java-platforms The session will cover various GC tuning techniques, in particular focus on tuning large scale JVM deployments. Come to this session to learn about GC tuning recipe that can give you the best configuration for latency sensitive applications. While predominantly most enterprise class Java workloads can fit into a scaled-out set of JVM instances of less than 4GB JVM heap, there are workloads in the in memory database space that require fairly large JVMs. In this session we take a deep dive into the issues and the optimal tuning configurations for tuning large JVMs in the range of 4GB to 128GB. In this session the GC tuning recipe shared is a refinement from 15 years of GC engagements and an adaptation in recent years for tuning some of the largest JVMs in the industry using plain HotSpot and CMS GC policy. You should be able to walk away with the ability to commence a decent GC tuning exercise on your own. The session does summarize the techniques and the necessary JVM options needed to accomplish this task. Naturally when tuning large scale JVM platforms, the underlying hardware tuning cannot be ignored, hence the session will take detour from the traditional GC tuning talks out there and dive into how you optimally size a platform for enhanced memory consumption. Lastly, the session will also cover Pivotal Application Fabric reference architecture where a comprehensive performance study was done.
Views: 6539 SpringDeveloper
Verifying Microservice Integrations with Contract Testing - Atlassian Summit 2016
 
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Ben Sayers Senior Developer, Atlassian Mauri Edo QA Engineer, Atlassian As you migrate your applications toward microservice architectures, new pains start to appear – like testing, for example. How on Earth do you verify all these separate moving parts work together before releasing? How can you be sure that your code is compatible with services that can't easily be spun up anymore? They are all written in different languages, operated by separate teams and deploy every day! Do you find yourself lying awake at night missing monolithic applications where integrations were easier to test? In this talk we'll reveal how Atlassian is adopting a new strategy called "contract testing", using the Pact open source library to test our microservices. We’ll introduce the concept of contract testing, talk about why we love this approach, and go through some examples and patterns that will help you get started.
Views: 26339 Atlassian
Managing and Monitoring Spring Integration Applications
 
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Recorded at SpringOne 2GX 2012 in Washington, DC Speaker: Gary P. Russell Note: this session is a follow on to Gary's popular June 2012 webinar, located here http://www.youtube.com/watch?v=fkZcF47NRu0 In this presentation we will discuss the options for managing and monitoring applications that use Spring Integration. It will provide a comprehensive overview of the extensive support for JMX provided by Spring Integration, both in terms of providing access to Spring Integration internals, as well as creating a JMX client to interact with local and remote MBeanServers. In addition, we will show how to use the Spring Integration plugin for Spring Insight to drill down into Spring Integration flow processing to examine application performance. Topics include: Using the Integration MBean Exporter, and the MBeans it registers, for analyzing Messaging Endpoints and Channels. Exporting the Integration MBean Exporter itself as an MBean, to gain access to it's attributes and operations. Using the Control Bus to start and stop endpoints. Using the Spring Integration plugin for Spring Insight to get a real-time view of your application and its performance. Enabling and using Message History Using the orderly shutdown mechanism available in Spring Integration 2.2. Using JMX endpoints (with local and remote MBeanServers) to monitor attributes, invoke operations, publish notifications, and receive notifications.
Views: 10693 SpringDeveloper
The Road to Serverless: Functions as Applications - Dave Syer @ Spring I/O 2017
 
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Spring I/O 2017 - 18 -19 May, Barcelona Slides: http://presos.dsyer.com/decks/road-to-serverless.html GitHub repo: https://github.com/dsyer/spring-cloud-function Spring Cloud Function provides a new programming model for Spring Boot applications, abstracting away all of the transport details and infrastructure, allowing the developer to keep all the familiar tools and processes, and focus firmly on business logic. Join this presentation to learn about the features of this new project, and why it is going to change the way that you build applications.
Views: 2142 Spring I/O
How we build JVM oriented microservice platform (Oleksandr Berezianskyi, Sigma Software Group)
 
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We will talk about what is a microservice platform and why sometimes you need to build your own platform instead of using an existing one. We will dive into a real saga of Java monolith drama and microservice hero that came to save developers (and even product owners!), the true story of root cause analysis and resulting requirements of the microservice platform, a tale of the Java team that built a microservice platform by going through the DevOps pain and 9 circles of internal sales. Our agenda will include: – What problems are we solving with microservices? – Why building a custom microservice platform? – Requirements of the microservice platform – Kubernetes as a main infrastructure – Linkerd – one of the best solutions for HTTP based microservices – Microservice template: SpringBoot, Undertow, RestEasy, Gradle – Jenkins based CI/CD as a necessary part of microservice platform – Sample implementation of microservice working in prod as the best argument to sell microservices – Documentation, documentation, documentation, documentation
Views: 861 jeeconf
Simplyfing Apache Geode with Spring Data Geode
 
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In the August 2016 Geode Clubhouse meeting, Spring developer John Blum discusses what's new with Spring Data Geode, and how he's radically simplifying development of Geode applications 01:20 Building Geode apps the old way 09:56 Simplifying with Spring Data Geode 15:16 Examples 24:43 Simpler way to get started with Geode 27:19 Q: Use Java config or XML in cloud? 33:46 Simpler cluster build up using Java config 44:30 Q: Do annotations use standard properties? 47:17 Q: How do annotations work vs. GFSH? 53:20 Demoing annotations for client services 55:34 Future work
Building Effective Apache Geode Applications with Spring Data GemFire
 
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Building Effective Apache Geode Applications with Spring Data GemFire by John Blum September 8, 2015 This talk will provide an overview of Spring Data GemFire and how SDG's features can be used to simplify the development of distributed, scalable applications leveraging Apache Geode's capabilities.
Frege, a Haskell for the JVM by Dierk König
 
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Between the many options for functional programming on the JVM, Frege is the only one that is pure. It follows the syntax and behavior of Haskell with super-strong type safety, Hindley-Milner type inference, higher-rank types, typeclasses, lazy evaluation per default, and announcing all effects in the type system. Frege is also unique in the way that it interoperates with Java: it does not compromise its language guarantees in terms of purity and type safety when calling into Java! Come and see how you can achieve pure functional programming on the JVM.
Views: 7479 Devoxx
OutOfMemoryError Java Heap Space Fix - Heap Dump Analysis VisualVM Tutorial
 
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In this tutorial I show you how and why a java.lang.OutOfMemoryError can occur when running a Java application. I also show you how to configure your application to perform a Java Heap Dump if an out of memory errors. Additionally; I perform heap dump analysis by importing it into a Java profiling tool such as VisualVM. This will help find the root cause. First I set the Java Heap size to 64m by changing the –Xms and –Xmx virtual machine arguments. What does –Xms stand for? This java virtual machine argument allows you to specify the initial size (bytes) of the java heap. What does –Xmx stand for? This java virtual machine argument allows you to specify the maximum size, in bytes, of the memory allocation pool. We set the java heap memory to such a small size that it can’t handle and save the amount of java objects being created. Once there is not enough memory left to allocate objects, the application will fail with an out of memory error. I then configure the application to perform a Heap Dump on java.lang.OutOfMemoryError by specifying the flag: XX:+HeapDumpOnOutOfMemoryError This heap dump will be present in your applications working directory. If you would like to change the output path of the heap dump you can specify it by passing the: -XX:HeapDumpPath I then proceed to execute the java application which has an infinite loop that will create and place objects on an Array list. The application eventually fell over and threw an OutOfMemoryError when we allocated a Brick Object and tried to place it in the list. The list was at its maximum capacity and tried to resize. An arraylist is backed by an array, which has a finite number of elements. Each time the list’s backing array has reached maximum capacity it defines a new array typically double the size and copies the old array’s contents over into the new array. Then the GC clears the old array. Unfortunately there was not enough room for the new backing array in the Java Heap which caused the application to crash. When the java failure occurred it left the java heap with file name pattern java_pid{process-id}.hprof, this file can then be imported into VisualVM Java profiler for analysis of the applications state when the out of memory error occurred. After importing the hprof file into VisualVM profiler we can analyse the java thread’s status and the memory allocation. We can see the last stack trace before the failure and the huge amount of Brick allocations. If your application ever crashes, it’s good to inspect the heap dump to find out what was going on. This will hopefully identify causes and will prevent future failures if you can put a fix in. If you work with a cloud based ephemeral file system, then you might not be able to create / access a heap dump, as the application’s file system is scrapped and a new application is started on failure. There are ways to work around this such as attaching a hard drive to the instance. It depends on the nature of the system. I hope you enjoyed the tutorial! Don’t forget to subscribe for more great tech videos! Thanks, Philip Eclipse VisualVM Launcher Integration Set-up Guide https://www.youtube.com/watch?v=W60wvJ885iE&t Java Heap Dump Analysis – VisualVM Tutorial https://www.youtube.com/watch?v=Uubqc76h-jo VisualVM https://visualvm.github.io/ Eclipse Visual VM Integration https://visualvm.github.io/idesupport.html Java Profiling http://docs.oracle.com/javase/7/docs/technotes/guides/visualvm/profiler.html What are the -xms and -xmx parameters when starting JVMs? https://stackoverflow.com/questions/14763079/what-are-the-xms-and-xmx-parameters-when-starting-jvms
Views: 5528 Philip Starritt
Java Buildpack in 2017
 
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Java Buildpack in 2017 [B] - Ben Hale, Pivotal Over the years, the Java Experience team has worked hard to ensure that Cloud Foundry was the best place to run Java applications in the cloud. To that end, we ensure that every year adds new functionality, new integrations, and improves what's already there. This session will discuss some of the exciting new integrations as well as the recent improvements made to JVM memory calculation. Ben Hale Pivotal Software, Inc. Cloud Foundry Java Experience Lead Ben Hale leads Pivotal's efforts to constantly improve the Java experience on Cloud Foundry. Recently he has been working on the Cloud Foundry Java Buildpack with an eye to making it the best place to run Java applications, in the Cloud or otherwise. In addition, he leads the team that is revamping the Cloud Foundry Java Client, a Java language binding on top of the Cloud Foundry REST APIs. Prior to working on Cloud Foundry, Ben worked on large-scale middleware management tools, tc Server, dm Server (OSGi), and Spring. If you go back far enough, he even worked on a network management and monitoring application, but will deny it when asked. Ben has been a regular on the conference circuit for the last 10 years, speaking at Spring One, Cloud Foundry Summit, Devoxx, No Fluff Just Stuff, and more.
Views: 1654 Cloud Foundry
Top 10 High Paying Software Jobs - Check Out What It takes ?
 
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Top 10 High Paying Software Jobs - Check Out What It takes ? Watch this video to find out highest paying software jobs. If you're a software engineer, database admin, a data scientist, fronted developer, designer or a mobile developer, find how much is the average annual pay for your skill sets. #10 .Net Developer - $84,000 What It takes ? Programming expe in ASP .NET MVC Basic knowledge in Html,CSS Jquery/Java Scripts, Bootstrap Working knowledge of Databases MS SQL, Oracle, NoSql, mongoDB Creating setups and exe. # 09 Database Admin - $87,000 What It takes ? Understanding of structured query language (SQL) Experience with RDBMS Assist in database design Manage Databases Maritain security and integrity of databases Database Security Upgrades and Installs Deployment strategies, failure protection #08 Fronted Developer - $92,000 What It takes ? Programming in HTML5 CSS3, JavaScript, Node.js Browser Developer Tools(Firefox, Chrome) Experience with Data Formats (e.g., JSON, XML) Content Management Systems(word-press, Blogger, Joomla etc..) Front End Frameworks RESTful Services and APIs Testing and Debugging Version Control Systems # 07 Mobile Developer - $96,000 What It takes ? Cross-platform Development,iOS, Android BlackBerry, Windows etc Good UX/UI Design Skills Programming knowledge Java, C#, Objective C /Swift, HTML5, PHP etc. Knowledge of Cross Platform Mobile Development Tools # 06 Java Developer - $96,500 What It takes ? OOPs Concepts Design Patterns Data Structures JVM Multi-threading and Synchronization Domain Knowledge Networking, Multi Media, Automobile, Finance JUnit testing, debugging, ANT Source Control (GIT, SVN, CVS etc..) Database Programming (SQL) #05 Software Engineer - $98,000 What It takes ? Programming Skills, C/C++, JAVA, PHP, Python, HTML5/CSS3, Ruby etc Knowledge of Source control Debugging skills problem solving Attention to Detail Teamwork Unit testing #04 DevOps Engineer - $106,000 What It takes ? Linux/Unix Administration coding and scripting in Python, PHP, Perl,Ruby Knowledge of opensource tools Experience with systems and IT operations Continuous Improvement (CI) Continuous Deployment, tools like Jenkins collaboration, open communication automation/configuration management # 03 Data Scientist - $115,000 What It takes ? Data mining methods Processing, cleansing, and verifying of data Great communication skills statistical programming language R or Python Database Querying language SQL, mongoDB Statistics, Multi variable Calculus and Linear algebra # 02 Software Architect - $128,500 What it takes ? Knowledge of various software architectures Resolve technical problems Technically competent Strong communicator Knowledge of core frameworks high level guidance and direction on project work Strong design experience # 01 Software Development Manager -$132,000 What it takes ? Managing Relationships Project Planning Process Control Negotiation Skills Vendor Management Presentation Skills Problem solving and decision making Knowledge of Domain,Development Cycles,Automation process, Quality Assurance,Release Management Team Staffing Administrative functions
Views: 705033 eaZyTips
Reactive Spring Deep Dive: Building & Testing Reactive Cloud-native Java Microservices
 
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with Mark Heckler With Reactive programming developers can build message-driven, elastic, resilient, responsive services - yet many don't know where to begin. The Reactive Streams initiative gives a baseline and Project Reactor is a great way to get immediately productive. Moving to a reactive, non-blocking model is not without its challenges. Relatively speaking, a blocking model is much simpler to code, debug, and troubleshoot. How do we handle exceptions in a never-ending flow of values? How can we provide options for publishers that still keep subscribers happy...and functional? How can we debug & fix things if the wheels come off? We will explore the net-new Netty-based web runtime and show you how to: integrate easily with existing Spring-stack technologies easily transition from blocking to reactive applications & systems build reactive data pipelines from your microservices all the way to the metal define your API in an imperative style and functionally, reaping all benefits both ways leverage powerful new testing mechanisms to make code better and life easier The presenter will code all examples live and in real time. Come to gain real, practical knowledge!
Views: 5113 Devoxx
Cure for noisy tremolo springs
 
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The tremolo springs on some guitars ring so loud when playing that they're audible through the amp, and add all sorts of unsavory dissonant overtones to your notes. This is a good cure.
Views: 149613 Gray Nicholson
VERBOSE JAVA COMMAND VIEW CLASSES LOADED INTO JVM DEMO
 
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VERBOSE JAVA COMMAND VIEW CLASSES LOADED INTO JVM DEMO InterviewDot - Tutorial http://www.InterviewDot.com http://www.InterviewDot.com http://www.InterviewDot.com FRESHERS core JAVA INTERVIEW QUESTION AND ANSWER EXPERIENCED core JAVA INTERVIEW QUESTION AND ANSWER SPRING FRAMEWORK INTERVIEW QUESTION AND ANSWER HIBERNATE INTERVIEW QUESTION AND ANSWER DESIGN PATTERNS INTERVIEW QUESTION AND ANSWER JQUERY INTERVIEW QUESTION AND ANSWER AJAX INTERVIEW QUESTION AND ANSWER SQL INTERVIEW QUESTION AND ANSWER JUNIT INTERVIEW QUESTION AND ANSWER SOFTWARE ARCHITECTURE INTERVIEW QUESTION AND ANSWER CODE REFACTORING INTERVIEW QUESTION AND ANSWER PERFORMANCE TUNING INTERVIEW QUESTION AND ANSWER JAVA VIRTUAL MACHINE INTERVIEW QUESTION AND ANSWER JQUERY TUTORIAL HIBERNATE TUTORIAL VERBOSE JAVA COMMAND VIEW CLASSES LOADED INTO JVM DEMO
Views: 253 Interview Dot
Spring Boot Improvements in IntelliJ IDEA 2017.2
 
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Including: new run dashboard and endpoints view; updated code completion for application configuration; easier to find settings.
Views: 10463 IntelliJ IDEA
Six principles for building fault tolerant microservices on the JVM by Christopher Batey
 
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Are you developing applications that communicate over a network? Of course you are! This talk will take you through all the ways you can build fault-tolerant applications and how, once you get your team in the mindset that everything will eventually fail, dealing with the failures gracefully is no more work than building fragile applications. With supporting slides, I'll cover the theory and motivation behind moving to a more distributed architecture and then go through the pitfalls and the strategies for improving fault-tolerance, backed up with real examples from the system I built at Sky television. After an introduction the talk will be split into 6 sections/principles/lessons learned from the field: Implementing SLAs + timeouts in a networked environment Proactively avoiding work: bound your queues Failing gracefully + don’t cascade failures Circuit breaking unreliable dependencies Kill switching unreliable dependencies Know it is your fault: monitoring a micro service architecture
Views: 9566 Devoxx
Understanding Microservice Performance - Rob Harrop @ Spring I/O 2016
 
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Spring I/O 2016 - 19 -20 May Barcelona The world at large seems sold on microservices as a way to build large, quality systems at the speed needed to compete in today's market. However, microservices are not without their downsides, one of which is the difficulty of reasoning about and optimising the performance of mircoservices working in tandem. In this session, attendees will learn the key concepts needed to measure the performance of their services, identify potential bottlenecks and take corrective action to ensure services perform as needed. Before we can reason about the performance of connected services, we must understand how to reason about services in isolation. The first half of the session is dedicated to discussing how to measure service performance correctly, what metrics matter and how to compare the performance of a service over time. In the second half of the session, we take our single-service knowledge and expand it out to reason about a set of services working together to provide some aggregate function. We'll see how the performance of each service affects the performance of the whole, and learn how to identify where to focus our optimisation efforts.
Views: 1998 Spring I/O
Scope for JAVA Developers 5 years done the lane - Careers in JAVA,Jobs,Salary
 
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Get Recruitment Notifications of all private and govt jobs , Mock test details ,Previous year question papers only at Freshersworld.com – the No.1 jobsite for entry level candidates in India. (To register : http://freshersworld.com?src=Youtube ) – This video is all about “Careers and Training courses for Java We have seen tremendous developments happening in and around in last 10-20 years. With the development of apps which reduces the human work load, JAVA has turned out to be one of the technologies which emerged as a boom to the IT sector. A Java Developer's job is to create and test computer programs using a special programming language called Java. Now what would be the future of programming for a JAVA Developer? Java is relevant and will continue to be relevant for many years in the Enterprise computing world. Whether it continues to be relevant in other areas depends a lot on what Oracle does. If they inject some life (and resources) into desktop applications and other areas, and if they press on with the evolution of the Java language, then Java will do well. But if Oracle cuts back on R&D and/or tries to stomp other players in the Java space, there's a good chance that someone or some company will develop a better (and more open) Java-like language. Yes, Java will certainly continue to be relevant and will probably maintain its position as no.1 overall platform for software development for a long time. Firstly, reasons why Java is and will continue to be a strong choice:  Java is still the most popular language and this means it has the most developers, most ongoing development, largest installed base etc.  Java, despite its flaws, is still an excellent language for developing enterprise applications.  Coming to Performance - Java is typically one of the fastest language/implementationcombinations available  It is used in Major corporate backing - Java is a strategic platform supported by many of the world’s largest and most important technology companies and organizations like Google, Oracle, IBM, the Apache Software Federation etc. Java also has substantial support from major users of technology - banks, media companies etc. No other language/platform has such broad industry support.  Portability: Java is the closest thing in existence to a genuine cross-platform programming environment. It's on everything from high end servers to smartphones, and compiled pure Java code will run unmodified on all these platforms.  It is an excellent tool, most of which are free and/or open source.  Java is Open Source a) the core Java implementation in the OpenJDK and b) most of the interesting Java libraries and tool are open source.  Java is not just a language, it's a platform: there are many promising languages My prediction would be that the Java language continues to receive minor enhancements to features while these new JVM languages are where the cutting edge innovation will happen. But it is all part of the Java platform. In the 2000s Java was a decent "first language" to learn just like Pascal was in the 80s. I've been hearing in many places that Java will go out of programming limelight soon. There are newer pop stars like RoR and Node.js coming up. But as I look around I see Java still being used as primary language of development, esp. here in mass-software-development-industries of India. The Java language will decline a bit in the next 5 or 10 years, but given the inertia of a lot of industries it will certainly not die off. We, at Freshersworld.com have posted ample number of jobs on JAVA Developers with a minimum salary of 3.5LPA, kindly apply for the jobs on the career page. Freshersworld.com is the No.1 job portal for freshers jobs in India. Check Out website for more Jobs & Careers. http://www.freshersworld.com?src=Youtube Download our app today to manage recruitment when ever and where ever you want : Link :https://play.google.com/store/apps/details?id=com.freshersworld.jobs&hl=en ***Disclaimer: This is just a training video for candidates and recruiters. The name, logo and properties mentioned in the video are proprietary property of the respective organizations. The Preparation tips and tricks are an indicative generalized information. In no way Freshersworld.com, indulges into direct or indirect promotion of the respective Groups or organizations.
JavaDay Lviv 2016: An Introduction to JVM Performance (Rafael Winterhalter)
 
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An Introduction to JVM Performance Rafael Winterhalter Software engineer @Scienta AS JavaDay Lviv (http://javaday.org.ua) - the community-driven conference for Java developers. Stay geeky!
Views: 1075 Devoxx Ukraine
Embedding JVM Scripting Languages
 
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This session focuses on embedding JVM scripting languages in Java applications. Groovy, JRuby, JavaScript...there are plenty of options to choose from. How do you go about choosing one when you have to deal with scripting in your next Java project. The different JVM scripting languages have different features, and the presentation analyzes the cases for and against, depending on the area of the application. It also assesses the different options for embedding the scripting engines into the runtime even though the options are fairly limited: you can use either JSR 223 interfaces or direct integration—each has its own strengths and pitfalls. You will learn how to integrate scripting into a Java application and what the benefits of this approach are. Author: Anton Arhipov JRebel (@jrebel) product junkie @ ZeroTurnaround, vim fan and IntelliJ addict http://linkd.in/aarhipov View more trainings by Anton Arhipov at https://www.parleys.com/author/anton-arhipov Find more related tutorials at https://www.parleys.com/category/developer-training-tutorials
Views: 226 Oracle Developers
Refactor your Java EE application using Microservices and Containers by Arun Gupta
 
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Subscribe to Devoxx on YouTube @ https://bit.ly/devoxx-youtube Like Devoxx on Facebook @ https://www.facebook.com/devoxxcom Follow Devoxx on Twitter @ https://twitter.com/devoxx Microservices allow to decompose a monolithic application into cohesive and multiple decoupled services. Each service is running in its own process and communicate using lightweight mechanisms, such as HTTP API. These services are built around business capabilities or functional decomposition. Microservice also enables true polyglot architecture – both in terms of language and data. It truly allows you to employ the right tool for the right job. Each service is independently deployable and lends very well to fully automated deployment machinery. Can you take an existing Java EE application and decompose it into microservices? What tools are required to enable CI/CD? How does it enable polyglot? What are different design patterns for microservices? What options are available for Service Discovery, distributed logging, load balancing? What tools do you need to manage such services? Is the complexity being pushed around from service implementation to orchestration? This session will explain how to refactor an existing monolith into microservices and the complexities and benefits it introduces.
Views: 55021 Devoxx
95.Java Intro -Chapter14.Wrap Up-Lesson2.Command Line Options for Java
 
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Visit My Channel : https://www.youtube.com/Javavideotutorails Java is a general-purpose, concurrent, class-based, object-oriented computer programming language that is specifically designed to have as few implementation dependencies as possible. It is intended to let application developers "write once, run anywhere WORA meaning that code that runs on one platform does not need to be recompiled to run on another. Java applications are typically compiled to byte code Class file that can run on any Java virtual machine JVM regardless of computer architecture.
Views: 121 Javavideotutorails
Virtualizing and Tuning Large Scale Java Platforms
 
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Recorded at SpringOne2GX 2013 in Stana Clara, CA Speakers: Emad Benjamin and Guillermo Tantachuco The session will cover various GC tuning techniques, in particular focus on tuning large scale JVM deployments. Come to this session to learn about GC tuning recipe that can give you the best configuration for latency sensitive applications. While predominantly most enterprise class Java workloads can fit into a scaled-out set of JVM instances of less than 4GB JVM heap, there are workloads in the in memory database space that require fairly large JVMs. In this session we take a deep dive into the issues and the optimal tuning configurations for tuning large JVMs in the range of 4GB to 128GB. In this session the GC tuning recipe shared is a refinement from 15 years of GC engagements and an adaptation in recent years for tuning some of the largest JVMs in the industry using plain HotSpot and CMS GC policy. You should be able to walk away with the ability to commence a decent GC tuning exercise on your own. The session does summarize the techniques and the necessary JVM options needed to accomplish this task. Naturally when tuning large scale JVM platforms, the underlying hardware tuning cannot be ignored, hence the session will take detour from the traditional GC tuning talks out there and dive into how you optimally size a platform for enhanced memory consumption. Lastly, the session will also cover Pivotal App Fabric reference architecture where a comprehensive performance study was done. Learn more about
Views: 2973 SpringDeveloper
Remote Debug Java Application Running in Tomcat using Eclipse
 
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JPDA (Java Platform Debugger Architecture) Parameters: 1. JPDA_TRANSPORT - (Optional) JPDA transport used when the "jpda start" command is executed. The default is "dt_socket". 2. JPDA_ADDRESS - (Optional) Java runtime options used when the "jpda start" command is executed. The default is localhost:8000. 3. JPDA_SUSPEND - (Optional) Java runtime options used when the "jpda start" command is executed. Specifies whether JVM should suspend execution immediately after startup. Default is "n". 4. JPDA_OPTS - (Optional) Java runtime options used when the "jpda start" command is executed. If used, JPDA_TRANSPORT, JPDA_ADDRESS, and JPDA_SUSPEND are ignored. Thus, all required jpda options MUST be specified.
Views: 2789 Onkar Kotasthane
Java in Spark | Spark-Submit Job with Spark UI Example | Tech Primers
 
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This video covers on how to create a Spark Java program and run it using spark-submit. Example code in Github: https://github.com/TechPrimers/spark-java-example Website: http://techprimers.com Slack Community: https://techprimers.slack.com To get invite, drop a mail to [email protected] Twitter: https://twitter.com/TechPrimers Facebook: http://fb.me/TechPrimers GitHub: https://github.com/TechPrimers or https://techprimers.github.io/ Video Editing: iMovie Background Music: Joakim Karud Dyalla
Views: 2543 Tech Primers
IntelliJ allocate more heap space for JVM
 
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VM options: -Xms512M -Xmx4096M. -Xms sets the heap size at startup while -Xmx sets the maximum allowed heap size for the application.
Views: 2956 Lazo00100001
NYJavaSIG 20180530 Chandra Guntur
 
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UNDERSTANDING MODERN GARBAGE COLLECTION Modern Java has a collection of sophisticated Garbage Collection patterns and models. Chandra Guntur, senior member of the NYJavaSIG and co-head of the NYJavaSIG Hands-On Workshop, will provide an overview of how basic Garbage Collection patterns and models work in Java. The presentation material includes various Regional Collector JVM options and flags for tuning GC behavior as well as new logging techniques using Java Unified Logging. And we will additionally focus on the new garbage collectors being introduced in Java 10, covering Shenandoah, ZGC and Epsilon. Chandra Guntur is a Director and senior technologist at BNYMellon, and an avowed Smalltalk programmer working in the Java world. He is a Spring and Spring Boot evangelist. He has deep experience working in the Financial Tech sector for the past 16 years. Previously worked in technology at Insurance, Pharmaceutical, Telecom and Utility/Library development. Confirmed Saganist.

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