The document discusses various design patterns and frameworks related to web presentation layers and integrating web and business layers. It covers the Context Object pattern for encapsulating state in a protocol-independent way. It also discusses the Synchronizer Token pattern for controlling duplicate requests and client access flow. For integrating remote web and business layers, it describes the Service Locator and Business Delegate patterns for locating and accessing business services through a centralized lookup mechanism or delegate respectively. Finally, it compares Transaction Script, Domain Model, and Table Module as architectural patterns for the business layer.
The Windows Azure Platform is an internet-scale cloud services platform hosted in Microsoft data centers that provides an operating system and a set of developer services that can be used individually or together. The Azure platform can be used to build new applications to run from the cloud or enhance existing applications with cloud-based capabilities. The open and extensible nature of Azure’s architecture gives developers the choice to build web applications, applications running on connected devices, PCs, servers, or hybrid solutions offering the best of online and on-premises.
In this session, Wade Wegner will focus on two scenarios – new application development and the migration of existing applications. While walking through demos, Wade will discuss concepts such as application authentication and authorization, data synchronization between the cloud and on-premises databases, application integration, delegation of identity, and operations and management. Particular emphasis will be placed on the migration of existing internal applications to Windows Azure, securing applications through claims-based authentication and passive federation with Geneva Server, using relational databases in the cloud with SQL Azure, and the migration of data to the cloud through tools like SSIS.
Introduction to Web Application Technologies
CGI Programs on the Web Server
What is servlet?
Jobs of servlet
Advantages over CGI
Why pages are build dynamically?
Servlet container
Installation & configuration
- Type 1: Integration of Tomcat server and eclipse
- Type 2: Java Servlet
Servlet Sample Example
Servlet Overview And Architecture
- Servlet Life cycle/Single Thread Model
- Interface Servlet
- HttpServlet Class
- HttpServletRequest, HttpServletResponse
HCLT Whitepaper: Multi- Tenancy on Private CloudHCL Technologies
http://www.hcltech.com/engineering-rd-services/overview~ More on Engineering and R&D
Advances in cloud computing technology and changes in business models create major paradigm shifts in the way software applications are designed, built, and delivered to end users. The concept of multi-tenancy is one of the key and direct derivatives of cloud computing. Multi-tenancy is an architectural model that optimizes resource sharing. The applications will be deployed and delivered from a shared environment while providing sufficient levels of isolation to the tenants and Quality of Service (QoS) throughout the environment. Like any other paradigm shift, a cloud-based delivery (SaaS) model also comes with a new set of technical challenges.
This paper provides a technical overview on how to convert an application traditionally hosted on-premise to a multi-tenant environment and deliver through an SaaS model. This paper also covers the challenges and benefits of moving this to a cloud infrastructure.
Excerpts from the Paper
The advent of cloud computing boosted a new business model for delivering software, which is generally termed SaaS (Software as a Service). ISVs started realizing the necessity of transforming their traditional on-premise products to the new ―cloud business model. Multi-tenancy is the fundamental design approach that essentially improves the acceptability of SaaS applications. The idea of multi-tenancy, or many tenants sharing resources, is fundamental to cloud computing. Isolation and service assurance are the key elements to be addressed. Isolation ensures that the resources of existing tenants remain untouched, and the integrity of the applications, workloads, and data remain uncompromised when the service provider provisions new tenants. Each tenant may have access to different amounts of network, computing, and storage resources in the shared virtual environment. Tenants see only those resources allocated to them.
Web Application Technologies,What is servlet?
Jobs of servlet
Advantages over CGI
Why pages are build dynamically?
Servlet container
Installation & configuration
- Type 1: Integration of Tomcat server and eclipse
- Type 2: Java Servlet
Servlet Sample Example
Servlet Overview And Architecture
- Servlet Life cycle/Single Thread Model
- Interface Servlet
- HttpServlet Class
- HttpServletRequest, HttpServletResponse
Handling client request :Http request
Generating Server Response : Http status code
Handling Session
- Cookies
- Session Tracking
- URL-re writing
- Hidden Form fields
Have ZENworks with current maintenance?
If the answer is yes, you may be entitled to two free licenses for Novell Service Desk.
See the slide presentation to learn more about Novell Service Desk capabilities.
Easy integration of Bluemix services with your applicationsJack-Junjie Cai
This presentation talks about how your Java EE and node.js applications can easily consume various cloud services available in the IBM Bluemix cloud platform. IBM Bluemix is based CloudFoundry.
Similar to Unit 07: Design Patterns and Frameworks (2/3) (20)
Software Delivery At the Speed of AI: Inflectra Invests In AI-Powered QualityInflectra
In this insightful webinar, Inflectra explores how artificial intelligence (AI) is transforming software development and testing. Discover how AI-powered tools are revolutionizing every stage of the software development lifecycle (SDLC), from design and prototyping to testing, deployment, and monitoring.
Learn about:
• The Future of Testing: How AI is shifting testing towards verification, analysis, and higher-level skills, while reducing repetitive tasks.
• Test Automation: How AI-powered test case generation, optimization, and self-healing tests are making testing more efficient and effective.
• Visual Testing: Explore the emerging capabilities of AI in visual testing and how it's set to revolutionize UI verification.
• Inflectra's AI Solutions: See demonstrations of Inflectra's cutting-edge AI tools like the ChatGPT plugin and Azure Open AI platform, designed to streamline your testing process.
Whether you're a developer, tester, or QA professional, this webinar will give you valuable insights into how AI is shaping the future of software delivery.
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
PHP Frameworks: I want to break free (IPC Berlin 2024)Ralf Eggert
In this presentation, we examine the challenges and limitations of relying too heavily on PHP frameworks in web development. We discuss the history of PHP and its frameworks to understand how this dependence has evolved. The focus will be on providing concrete tips and strategies to reduce reliance on these frameworks, based on real-world examples and practical considerations. The goal is to equip developers with the skills and knowledge to create more flexible and future-proof web applications. We'll explore the importance of maintaining autonomy in a rapidly changing tech landscape and how to make informed decisions in PHP development.
This talk is aimed at encouraging a more independent approach to using PHP frameworks, moving towards a more flexible and future-proof approach to PHP development.
Connector Corner: Automate dynamic content and events by pushing a buttonDianaGray10
Here is something new! In our next Connector Corner webinar, we will demonstrate how you can use a single workflow to:
Create a campaign using Mailchimp with merge tags/fields
Send an interactive Slack channel message (using buttons)
Have the message received by managers and peers along with a test email for review
But there’s more:
In a second workflow supporting the same use case, you’ll see:
Your campaign sent to target colleagues for approval
If the “Approve” button is clicked, a Jira/Zendesk ticket is created for the marketing design team
But—if the “Reject” button is pushed, colleagues will be alerted via Slack message
Join us to learn more about this new, human-in-the-loop capability, brought to you by Integration Service connectors.
And...
Speakers:
Akshay Agnihotri, Product Manager
Charlie Greenberg, Host
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💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
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Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
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Speakers:
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LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
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Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
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The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
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The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
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Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
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In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
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Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
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https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
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Interested in deploying notification automations for Bonterra Impact Management? Contact us at sales@sidekicksolutionsllc.com to discuss next steps.
Neuro-symbolic is not enough, we need neuro-*semantic*Frank van Harmelen
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My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
1. Unit 7: Design Patterns and Frameworks (cont.)
Other Web presentation layer issues:
Design Pattern: Context Object
Web Presentation layer refactoring: Synchronizer Token
Session state management
Web presentation/Business layers integration
Integration patterns with remote business layer:
Service Locator
Business Delegate
Business layer architectural patterns
Transaction Script
Domain Model
Table Module
dsbw 2011/2012 q1 1
2. Context Object
Problem: You want to avoid using protocol-specific system
information outside of its relevant context.
For example, web components receive protocol-specific HTTP
requests. Sharing HTTP requests with other components both
within and outside the presentation tier exposes these
components to protocol specifics.
Forces:
You have components and services that need access to system
information.
You want to decouple application components and services from the
protocol specifics of system information.
You want to expose only the relevant APIs within a context.
Solution: Use a Context Object to encapsulate state in a protocol-
independent way to be shared throughout your application
dsbw 2011/2012 q1 2
5. Synchronizer Token
Problem: Clients make duplicate resource requests that
should be monitored and controlled, or clients access certain
views out of order by returning to previously bookmarked
pages.
Forces:
You want to control the order or flow of the requests.
You want to control duplicate request submissions from a
client. Such duplicate submissions may occur when the user
clicks the Back or Stop browser buttons and resubmits a form
Solution: Use a Synchronizer Token to monitor and control
the request flow and client access to certain resources.
dsbw 2011/2012 q1 5
6. Synchronizer Token: Mechanics
Create one or more helper classes
responsible for generating and
comparing one-time-use, unique
tokens.
The component managing this
activity delegates to these helpers,
managing the temporary storage of a
fresh token for each client
submission.
A copy of the token is stored per user
on the server and on the client
browser. The token is typically stored
on the client browser as a hidden
field and on the server in a user
session.
Add logic to check whether the token
arriving with the client request
matches the token in the user
session.
dsbw 2011/2012 q1 6
7. Session State Management
Solution Implementation Benefits Drawbacks
On the Client Hidden Form Fields Easy to Limited amount of
HTTP Cookies implement. data
URI Rewriting No problems with Security concerns
load-balanced if data not
server clusters encrypted
On the Web HttpSession and Easy-to-use APIs Load-balanced
container the like server clusters
require special
treatments
On a DB Stored in a DB Sharable Penalizes DB
table Recoverable performance
dsbw 2011/2012 q1 7
8. Web Presentation/Business Layers Integration
Web Container
Web Presentation Layer
Business Layer
Data Source Layer
Web server
Local procedure calls between web presentation and
business components
Direct access to the controllers in the business layer
dsbw 2011/2012 q1 8
9. Web Presentation/Business Layers Integration
Web Container Application Server
Business Layer
Web Presentation
Layer
Data Source Layer
Web server
Remote communication between web presentation and
business components:
Communication protocols and/or middleware for distributed
components
Name and/or directory services to locate remote components
DTOs to transfer data between remote components
dsbw 2011/2012 q1 9
10. Service Locator
Problem: You want to transparently locate business components
and services in a uniform manner.
Forces:
You want to use a lookup mechanism to locate business components
and other services.
You want to centralize and reuse the implementation of lookup
mechanisms for application clients.
You want to encapsulate vendor dependencies for registry
implementations, and hide the dependency and complexity from the
clients.
You want to avoid performance overhead related to initial context
creation and service lookups.
You want to reestablish a connection to a previously accessed
component and service
Solution: Use a Service Locator to implement and encapsulate
service and component lookup.
dsbw 2011/2012 q1 10
11. Service Locator: Structure
Target: the service or
component that the Client is
looking up
IntialContext: the starting
point in the lookup and
creation process.
RegistryService: the registry
implementation that holds
the references to the
services or components that
are registered as service
providers for Clients
Cache: holds onto references
that have been previously
looked up.
dsbw 2011/2012 q1 11
13. Business Delegate
Problem: You want to hide clients (Web presentation components)
from the complexity of remote communication with business
service components.
Forces:
You want to access the business layer components from your Web
presentation layer components.
You want to minimize coupling between clients and the business
services, thus hiding the underlying implementation details of the
service, such as lookup and access.
You want to avoid unnecessary invocation of remote services.
You want to translate network exceptions into application or user
exceptions.
You want to hide the details of service creation, reconfiguration, and
invocation retries from the clients.
Solution: Use a Business Delegate to encapsulate access to a
business service.
dsbw 2011/2012 q1 13
16. “Classic” J2EE Architecture
Web Container
J2EE
Servlets / Web Classes
Server
Business Interface
Business Delegate
RMI
EJB Container J2EE
Server
Session EJB
(Same or
Separate
JVM
Entity EJB (optional)
DBMS Legacy System
dsbw 2011/2012 q1 16
17. Business Layer Architectural Patterns
Architectural Description Benefits Drawbacks
Pattern
Transaction A single procedure for Simple paradigm Duplicated code as
Script each action that a user Works well with several transactions
might want to do: takes RDBMS need to do similar
the input from the things
presentation, processes
it, and stores data in the
database.
Domain Model Conceptual Model Pure OO: reuse, Object-Relational
objects become Business inheritance, impedance
Layer components polymorphism, etc. mismatch.
Design Patterns Data Mapper.
Table Module Third way solution: OO Takes advantage Not so easy to
business layer with of many Data implement than
coarse objects that Access APIs Transaction Script
correspond to DB tables (ADO.NET, JDO, Not so powerful
JDBC, …) than Domain Model
dsbw 2011/2012 q1 17