Java programing considering performance
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The document discusses several topics related to optimizing Java program performance including: 1. Using buffering and non-blocking I/O for file reading/writing to improve efficiency. 2. Minimizing network calls by retrieving related data in one call and using design patterns like the session facade. 3. Reusing objects when possible rather than constantly creating new instances to reduce garbage collection overhead.
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The document discusses the Java Virtual Machine (JVM) and garbage collection. It describes the JVM memory areas like the heap, stack, method area and PC registers. It explains garbage collection techniques like minor and major GC used for young and old generation memory. The document also discusses different garbage collectors like serial, parallel, CMS and G1 collectors and how they perform compaction to reduce heap fragmentation. Tools for monitoring heap usage like jconsole and Websphere resource analyzer are also mentioned.
Web Sphere Problem Determination Ext
This document provides an overview and agenda for the "Busy Java Developer's Guide to WebSphere Debugging & Troubleshooting" presentation. The presentation covers various WebSphere Application Server components, troubleshooting tools like IBM Support Assistant, JVM troubleshooting tools, problem determination tools, common problem scenarios, how customers run into trouble, and includes a demo and Q&A section. It provides an in-depth look at debugging and resolving issues with WebSphere Application Server.
performance optimization: Memory
Memory management best practices in Android include using the sparse array family for collections below 1,000 items, avoiding unnecessary object creation, using StringBuilder for string concatenation, properly closing streams to prevent memory leaks, and using patterns like object pools and flyweights to reduce memory usage. The onTrimMemory callback and memory monitoring tools like Memory Monitor and Heap Viewer can help detect memory issues and leaks in an Android application.
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This document discusses the importance of code reviews for programmers. It notes that code reviews can increase quality, reduce defects, improve readability, and help programmers share knowledge and get to know each other better. The document provides recommendations for different code review methodologies, how to prepare code for review, what reviewers should focus on, ways to improve code quality through refactoring and following best practices like using meaningful names and comments. It also discusses principles like DRY, object orientation, design patterns, and attention to performance and security.
Python introduction
This document provides an introduction and overview of the Python programming language. It discusses what Python is, how it can be used for tasks like web development, data analysis, and scientific computing. It also covers how to get started with Python, including installing it and using basic features like variables, functions, modules, and packages. Examples are provided for common Python concepts like lists, dictionaries, and working with CSV files. MongoDB and the PyMongo module for interacting with MongoDB databases from Python are also briefly introduced.
Code reviews
This document discusses the importance and benefits of code reviews. It notes that code reviews can increase quality, reduce defects, improve readability, share knowledge within a team, and help people get to know each other better. The document outlines different methodologies for conducting code reviews, such as team reviews, pair programming, walkthroughs, and peer reviews. It also provides tips for preparing code for review and things reviewers should check for, such as naming conventions, logic, refactoring, performance, and security. Overall, the document promotes code reviews as a way to improve code quality and collaboration.
E commerce search strategies
This document discusses how faceted navigation and Apache Solr/Lucene can help e-commerce sites improve search capabilities. It outlines key factors for an effective e-commerce search strategy, including relevance, keywords, faceting, language support, updates, best bets, and assistance tools. Solr offers features that enhance relevance, enable refinement through facets, support multiple languages, and provide hints to guide buyers to the right products. With Solr's open source approach, e-commerce sites can customize search solutions to deliver relevant results and a compelling shopping experience for customers.
Saml
SAML (Security Assertion Markup Language) is an OASIS standard for exchanging authentication and authorization data between security domains. It defines protocols for single sign-on and federated identity management. SAML assertions contain statements that can express authentication, authorization decisions, or attributes about a subject. SAML uses XML signatures and encryption to ensure assertions can be securely exchanged. Common use cases include web single sign-on across multiple domains and federated identity management where user attributes and identifiers are shared between organizations in a privacy-preserving manner.
JavaEE6
JBoss Application Server is a leading open source Java EE application server that provides a developer-friendly environment for building and deploying enterprise applications. Key features include blazing fast startup times, a lightweight footprint, true application isolation through modular class loading, hot incremental deployment, and elegant administration capabilities. It is based on many best-of-breed open source projects and supports the full Java EE 6 programming model.
Indefero source code_managment
Indefero is a web-based open source application that combines source code management, wiki documentation, issue tracking and more into a single tool. It provides functionality for both public and private projects, and supports version control systems like SVN, Git and Mercurial. Indefero allows flexible user access levels and easy promotion of users to contributor status. The project is under active development with a stable 1.0 release and plans for additional features in upcoming versions.
Web Services Atomic Transactio
This document defines the Web Services Atomic Transaction (WS-AT) specification for coordinating atomic transactions across web services. It defines three protocols for coordinating the outcome of short-lived distributed activities: 1) a completion protocol, 2) a volatile two-phase commit protocol, and 3) a durable two-phase commit protocol. The specification was developed by a group of companies to enable existing transaction systems to interoperate across platforms using web services standards.
Web service through cxf
The document provides an overview of developing web services using the Apache CXF framework. It discusses why CXF was chosen, how to set up the environment, and demonstrates developing a SOAP-based web service and client using JAX-WS and Spring configuration. It also covers developing RESTful services with CXF JAX-RS and the CXF architecture.
Q con london2011-matthewwall-whyichosemongodbforguardiancouk
The document discusses the author's experience with database selection and migration for the guardian.co.uk website, describing how they evolved from a relational database to a NoSQL database (MongoDB) to address scalability and flexibility issues. It outlines the benefits of MongoDB for the author's use case, including flexible schema, simple data model mapping, and ease of queries. MongoDB was selected to build a new identity management system after issues were encountered with scaling the existing relational database solution.
Consistency-New-Generation-Databases
The document discusses transaction and consistency models in databases as the database world changes. It covers the CAP theorem and how it is impossible to guarantee availability, consistency and partition tolerance simultaneously in an asynchronous distributed system. It then discusses various consistency models including eventual, monotonic read, and read your own writes (RYOW). Examples are provided of eventually consistent systems. The document also discusses Amazon Dynamo's consistency model and how MongoDB supports different consistency levels and strategies for handling multiple writers and network partitions.
Ca siteminder
CA SiteMinder is a comprehensive web access management solution that addresses key objectives such as authentication, single sign-on, authorization, and auditing. It provides proven scalability, reliability, and advanced capabilities to help organizations securely deliver applications and information over the web. Recent innovations in CA SiteMinder release 12 include an extensible policy store, tools for administering large-scale deployments, and enterprise policy management capabilities.
Eclipse plug in mylyn & tasktop
This document provides information about Mylyn and Tasktop plugins for Eclipse, including:
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Jenkins
Jenkins is a tool that supports continuous integration by automatically building, testing, and deploying code changes. It integrates code changes frequently, at least daily, to avoid "big bang" integrations. Jenkins runs builds and tests across multiple platforms using slave nodes. It supports various source control systems and build tools and notifies developers of failed builds or tests through email or other plugins.
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Java programing considering performance
- 1. Java programming considering performance Roger Xia 2008-05
- 3. General idea
- 12. Java performance analyze and design
- 26. Eden SS1 SS2 Old Eden SS1 SS2 Old Eden SS1 SS2 Old Eden SS1 SS2 Old First GC Second GC Eden SS1 SS2 Old New Object Region Old Object Region
- 34. Best Practices to improve performance in Java programming
- 49. Java Base