Real time web apps

This document discusses WebSocket and Server-Sent Events (SSE) for building interactive web applications. It provides an overview of WebSocket including how it enables full-duplex communication over a single TCP connection and the handshake process. It also discusses the Java API for WebSocket including annotated endpoints and custom payloads. Finally, it covers SSE, the EventSource API, and an example SSE implementation in Java.

This document provides an overview and agenda for a presentation on Apache ActiveMQ and Apache ServiceMix. The presentation covers installing and configuring ActiveMQ, using ActiveMQ with Spring JMS, ActiveMQ features like message routing and topologies, an introduction to Apache ServiceMix for enterprise service buses and message routing, and options for using ActiveMQ like directly, with message-driven beans, or with Spring message listeners.

Web servers help deliver content that can be accessed through the Internet. Tim Berners-Lee developed the first web server, known as CERN httpd, in 1989 at CERN. Web servers listen on port 80 and handle requests by mapping URLs to files in their root directories or by dynamically generating content. They create and send responses back to clients, handling connections by forking new threads or processes. Apache is the most commonly used web server, hosting over 60% of websites in March 2011.

This document summarizes the non-functional benefits of scaling web applications using Coherence*Web for HTTP session management. It discusses how Coherence*Web provides redundancy, high availability, independent scaling of application and session tiers, and reduced latency through use of a local near cache. It also describes different session models (traditional, monolithic, split) and how attribute scoping can be configured to isolate or share sessions across applications.

Web servers are software applications that deliver web content accessible over the Internet or intranets. They host websites, files, scripts, and programs and serve them using HTTP and other protocols. Common web servers include Apache, Microsoft IIS, and Sun Java. Tomcat is an open source web server and servlet container. It implements Java servlets and JSP specifications, providing a Java HTTP environment. Tomcat's main components are Catalina for servlet handling, Coyote for HTTP connections, and Jasper for JSP compilation. While Apache is generally better for static content, Tomcat can be used with Apache for Java/JSP applications.

Apache is the most popular web server, powering over half of all websites. It is an open-source software developed by the Apache Software Foundation to be deployed across various operating systems like Linux, Unix, and Windows. Some key features of Apache include virtual hosting, large file support, bandwidth throttling, and server-side scripting. The second most popular is Microsoft's IIS web server, which is optimized for Windows environments.

The document provides information about web servers, database servers, and popular open source software used for each. It discusses what a web server and database server are, how they work, examples of common software like Apache and MySQL, and steps to install and configure Apache and MySQL on Ubuntu.

a seminar about web Server in Internet Applications for the Faculty of Information Technology Engineering in Damascus University

Talk given at the Apache Kafka NYC Meetup, October 20, 2015. http://www.meetup.com/Apache-Kafka-NYC/events/225697500/ Kafka has emerged as a clear choice for a high-throughput, low latency messaging system that addresses the needs of high-performance streaming applications. The Spring Framework has been, in the last decade, the de-facto standard for developing enterprise Java applications, providing a simple and powerful programming model that allows developers to focus on the business needs, leaving the boilerplate and middleware integration to the framework itself. In fact, it has evolved into a rich and powerful ecosystem, with projects focusing on specific aspects of enterprise software development - like Spring Boot, Spring Data, Spring Integration, Spring XD, Spring Cloud Stream/Data Flow to name just a few. In this presentation, Marius Bogoevici from the Spring team will take the perspective of the Kafka user, and show, with live demos, how the various projects in the Spring ecosystem address their needs: - how to build simple data integration applications using Spring Integration Kafka; - how to build sophisticated data pipelines with Spring XD and Kafka; - how to build cloud native message-driven microservices using Spring Cloud Stream and Kafka, and how to orchestrate them using Spring Cloud Data Flow;

Apache Kafka Introduction, Use Cases, Comparison with other similar tools, Zookeeper overview, and so on. - Team Clairvoyant

Three sentences summarizing the key points: The document discusses how to give Sencha apps real-time web performance. It covers data transfer over HTTP and introduces WebSockets as a better solution for real-time communication. The document also discusses frameworks like SignalR that use WebSockets and provides fallback options, and recommends designing apps to throttle data based on available bandwidth for wireless networks.

This presentation discusses HTML 5 WebSockets and how they enable full-duplex communication in web applications, moving past limitations of traditional HTTP. The speakers are founders of Kaazing, which provides an open source HTML 5 WebSocket gateway. The presentation covers challenges with existing "Comet" techniques, and how WebSockets and Server-Sent Events in HTML 5 allow any TCP-based backend service to be accessed through a browser. A demo shows using WebSockets to build a real-time XMPP chat client.

A web server is a computer program and server that allows for hosting of websites and web applications. It accepts requests from browsers and returns HTML documents and other content. Common technologies used on web servers include CGI scripts, SSL security, and ASP to provide dynamic content and server-side processing. Web servers work by accepting connections from browsers, retrieving content from disk, running local programs, and transmitting data back to clients as quickly as possible while supporting threads and processes.

Apache Kafka is a distributed messaging system that handles large volumes of real-time data efficiently. It allows for publishing and subscribing to streams of records and storing them reliably and durably. Kafka clusters are highly scalable and fault tolerant, providing throughput higher than other message brokers with latency of less than 10ms.

The document discusses message brokers and Apache Kafka. It defines a message broker as middleware that exchanges messages in computer networks. It then discusses how message brokers work using queuing and publish-subscribe models. The document focuses on describing Apache Kafka, a distributed streaming platform. It explains key Kafka concepts like topics, partitions, logs, producers, consumers, and guarantees around ordering and replication. It also discusses how Zookeeper is used to manage and monitor the Kafka cluster.

This document discusses implementing advanced caching and replication techniques in the Apache web server. Three new Apache modules were developed: mod_replication allows servers to track replicated documents and send invalidation messages when they change, mod_cgr upgrades proxy servers to replication servers and controls updating invalidated documents, and mod_wlis extracts replication server information from document headers and stores it in a database. The modules aim to improve document availability, reduce latency and traffic, and enable load balancing through caching and replication.

This document discusses distributed web applications and the roles of SOA and REST architectures. It defines distributed applications as those composed of many machines to handle load and provide high availability. SOA uses stateless processing units and a shared data store, while REST (Representational State Transfer) realizes ROA (Resource Oriented Architecture) through resources that support GET, PUT, POST, DELETE operations. The document uses an example of a network management application to illustrate how each approach would structure resources and operations. It also discusses REST principles and implementation, as well as when each approach is most appropriate.

WebSocket is a protocol that provides full-duplex communication channels over a single TCP connection. It was standardized in 2011 and allows for real-time data exchange between a client and server. The document discusses how WebSocket works, compares it to previous techniques like polling which had limitations, and outlines how to implement WebSocket in Java using JSR 356 and in Spring using the WebSocket API and STOMP protocol.

Biography Tim Spann is a Principal DataFlow Field Engineer at Cloudera where he works with Apache NiFi, MiniFi, Pulsar, Apache Flink, Apache MXNet, TensorFlow, Apache Spark, big data, the IoT, machine learning, and deep learning. Tim has over a decade of experience with the IoT, big data, distributed computing, streaming technologies, and Java programming. Previously, he was a senior solutions architect at AirisData and a senior field engineer at Pivotal. He blogs for DZone, where he is the Big Data Zone leader, and runs a popular meetup in Princeton on big data, the IoT, deep learning, streaming, NiFi, the blockchain, and Spark. Tim is a frequent speaker at conferences such as IoT Fusion, Strata, ApacheCon, Data Works Summit Berlin, DataWorks Summit Sydney, and Oracle Code NYC. He holds a BS and MS in computer science. Talk Real-Time Streaming in Any and All Clouds, Hybrid and Beyond Today, data is being generated from devices and containers living at the edge of networks, clouds and data centers. We need to run business logic, analytics and deep learning at the scale and as events arrive. Tools: Apache Flink, Apache Pulsar, Apache NiFi, MiNiFi, DJL.ai Apache MXNet. References: https://www.datainmotion.dev/2019/11/introducing-mm-flank-apache-flink-stack.html https://www.datainmotion.dev/2019/08/rapid-iot-development-with-cloudera.html https://www.datainmotion.dev/2019/09/powering-edge-ai-for-sensor-reading.html https://www.datainmotion.dev/2019/05/dataworks-summit-dc-2019-report.html https://www.datainmotion.dev/2019/03/using-raspberry-pi-3b-with-apache-nifi.html Source Code: https://github.com/tspannhw/MmFLaNK FLiP Stack StreamNative

- SignalR provides a simple way to add real-time web functionality to applications. It allows for persistent connections and messaging between servers and clients. - It abstracts away the various techniques for real-time communication like websockets, long polling, and server-sent events and chooses the best transport. - SignalR uses hubs to facilitate two-way communication between clients and servers through methods. This allows for different message types and structures to be sent.

- Signaling protocols like SIP and XMPP allow WebRTC applications to establish real-time media sessions by providing a way for clients to communicate session details. - Scaling signaling to support millions of users is challenging due to the need to maintain many open connections. Distributed architectures are required. - Security objectives for WebRTC include confidentiality, integrity, and authenticity of media streams, but authenticating user identities in signaling is also important. - Mobility poses issues for signaling as users' IP addresses may change when hopping networks, disrupting existing connections.

This document discusses various topics related to Action Message Format (AMF) including its history, benefits, and implementations across different programming languages and platforms. AMF allows serialization of ActionScript object graphs into a compact binary format for transmission between a Flash player and server. It offers benefits like fast serialization/deserialization and low bandwidth usage compared to alternatives like XML. The document provides information on AMF implementations for popular server-side languages and frameworks like PHP, Java, Python, Ruby and .NET.

An introduction to SignalR This deck was part of my presentation to Virtusa employees on an ASP.NET asynchronous, persistent signaling library known as SignalR There is also a slide on how to use SignalR with SharePoint. Date: August 2013 Follow / Tweet me: @ShehanPeruma

This document discusses HTML5 programming and several HTML5 features including multimedia, canvas, web sockets, web storage, indexed databases, offline capabilities, file systems, and geolocation. It provides examples and explanations of how to use these new HTML5 features in programming and notes that while specifications continue to evolve, real-world browser support is more important. It aims to cover programming aspects of video, canvas, web sockets, data storage, offline usage, file systems, and geolocation.

Servlet is very easily the most important standard in server-side Java. The much awaited HTTP/2 standard is now complete, was fifteen years in the making and promises to radically speed up the entire web through a series of fundamental protocol optimizations. In this session we will take a detailed look at the changes in HTTP/2 and discuss how it may change the Java ecosystem including the foundational Servlet 4 specification included in Java/Jakarta EE 8.

1st Session - WebSockets, a Server Push Technology: - Differences between Pull and Push technologies - What are WebSockets - A bit of History behind WebSockets - When to use WebSockets - How to integrate WebSockets with OutSystems - Considerations when using WebSockets Free Online training: https://www.outsystems.com/learn/courses/ Follow us on Twitter http://www.twitter.com/OutSystemsDev Like us on Facebook http://www.Facebook.com/OutSystemsDev

Big data Chennai Meetup Title: What it takes to build system for 1 M web sockets Presenter: Dwarakanath R Principal Architect, 8KMiles

Join the asynchronous web revolution! Because Ajax-based applications are almost becoming the de facto technology for designing web-based applications, it is more and more important that such applications react on the fly, or in real time, to both client and server events. AJAX can be used to allow the browser to request information from the web server, but does not allow a server to push updates to a browser. Comet solves this problem. Comet is a technology that enables web clients and web servers to communicate asynchronously, allowing real-time operations and functions previously unheard of with traditional web applications to approach the capabilities of desktop applications. This session will start to provide an brief introduction to the asynchronous web, AJAX polling, long polling, and Streaming, explaining the Bayeux protocol, Cometd, Grizzly Comet implementation on GlassFish. Different approaches and best practices to develop comet application will also be discussed. You will learn how to develop the chat application, how to implement distance learning slideshow application, how to manage a chat application from the server and how to develop a two-player distributed game application. Attendees will take away the tactics they need in order to add multiuser collaboration, notification and other Comet features to their application, whether they develop with Dojo, jQuery, jMaki, or Prototype and whether they deploy on Jetty, Tomcat, or the GlassFish Application Server.

GatewayScript is a new JavaScript runtime for DataPower appliances that simplifies configuration for developers. Link aggregation increases network redundancy and throughput by combining multiple Ethernet interfaces. WebSockets enable full-duplex communication and DataPower can secure and route initial connections. The release also includes enhancements to OAuth 2.0 token handling and support for deploying DataPower virtual editions on Citrix XenServer.

Scenic city summit real-time streaming in any and all clouds, hybrid and beyond 24-September-2021. Scenic City Summit. Virtual. Real-Time Streaming in Any and All Clouds, Hybrid and Beyond Apache Pulsar, Apache NiFi, Apache Flink StreamNative Tim Spann https://sceniccitysummit.com/