Difference between flow, sub flow and private flow in MuleSoft

All three Flow types can be referenced from a Flow Reference component.

Flow is a message processing block that has its own processing strategy and exception handling strategy. Used in integration tasks, data processing, connecting applications, event processing, etc.

Subflow always processes messages synchronously but inherits processing strategy and exception handling strategy from the calling flow. It can be used to split common logic and be reused by other flows.

Private flow does not have source define. It can be synchronous or asynchronous based on the processing strategy selected. Also, they have their own exception handling strategy. Allows you to define different threading profile.

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Processing strategy

While sub-flow is always synchronous the private flow behavior depends on the processing strategy

Performance

Sub-flow has a better performance when using request-response exchange pattern as they are actually a new processor chain injected in the flow at configuration time. Private flows are instead useful for asynchronous call provided you configured their processing strategy properly

Exception strategy

Private flow: the exception will be trapped by the local ES the exception will not be propagated to that main flow.

Sub-flow: will use the exception strategy defined in the main flow and it will have the exception got in the sub-flow.

Message Properties

In both case all properties, regardless their scope, are preserved from the main flow.

Threading profile

Private flows: allows you to define a different threading profile, but if you don't they will use the default one, not inherit the invoking flow one 

Sub-flows: they will share the parent flow threading profile configuration

Overall

Sub-flows run within the same execution context (exception handler, transaction, properties) of its main flow, while private flow will initiate a new execution context.

To summarize, sub-flow is always recommended except in the case the exception needs to be handled in a separate flow different from the main flow or you are implementing an asynchronous pattern

Agile Methodologies

Agile Methodologies

• SCRUM
• XP - Extreme Programming
• LEAN KANBAN
• CRYSTAL
• Dynamic Systems Development Method (DSDM Atern)
• Feature Driven Development (FDD)
• Agile Project Management (APM)
• OpenUP

Agile Concepts

Tools and Techniques

PMI-ACP Exam Content (7-Domains)
1. Agile Principles and Mindset
2. Value Driven Delivery
3. Stakeholder Engagement
4. Team Performance
5. Adaptive Planning
6. Problem Detection and Resolution
7. Continuous Improvement


Tips, Tricks, Strategies and Tools

Agile adoption leads to effective scaling and faster delivery

Take up more projects and deliver faster

PMI - Agile Certified Practitioner (ACP)

Agile

• Customer requirements and solutions evolve through the repeated cycles of planning, collaboration and delivery
• Iterative and Incremental (Evolutionary)
• Meets changing needs of stakeholders
• "Just Enough Ceremony" - means creating only those documents that justifies the requirement.

Agile Best Practices

• Face to Face communication
• Shorter Development cycle
• Business and Developer Collaboration
• Working software as the primary demonstration of progress
• Effective Engineering Practices
• Frequent demonstrations of progress and early ROI
• Inspect and adapt to business changes
• Retrospectives and continuous improvement

Agile Core Principles and Practices

• Early Delivery of Value through Iterations with Demos
• User Stories reflect Business Value and Priority
• Continuous Involvement of the customer
• Acceptance Tests for all Requirements
• Retrospectives
• Sustainable Pace or Velocity
• Communication
• High Visibility

Scrum Learnings

Three Pillars of Scrum

• Transparency
• Inspection
• Adaptation

Scrum Team & Roles (comprises of FIVE to NINE members 7+-2 excluding the SM & PO)

• Product Owner
• Scrum Master
• Development

Key Terms

• Product Backlog
• All work to be performed in the foreseeable future, both well-defined and that requires further definition
• Sprint 
• period of 30 days or less within which a set of work will be performed to create a deliverable
• Spring Backlog
• A well-defined requirement that can be worked on with little change, 
• over 30 days or less,
• resulting in a tangible, potentially shippable incremental deliverable
• Scrum
• A daily meeting at which progress and impediments to progress are reviewed

- Release Backlog (Shortlisted prioritized items ready for a Sprint execution)

- Visibility and Velocity

Scrum Meetings

• Sprint Planning
• Daily Stand-Up Meeting
• Sprint Review
• Retrospection

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XP - Extreme Programming

XP

• respond to high cost of changing requirements; and
• establish strong engineering practices to improve software quality

XP introduced revolutionary concepts, such as:

• Test Driven Development;
• Continous Integration;
• Iterations; and
• User Stories

Five Core Principles of XP

• Communication
• Simplicity
• Feedback
• Courage
• Respect

XP Practices

• Fine-scale feedback
• Pair-Programming
• Planning Game
• Test-Driven Development
• Whole Team
• Continuous Process
• Continuous Integration
• Refactoring or design improvement
• Small releases
• Shared Understanding
• Coding standards
• Collective code ownership
• Simple design
• System Metaphor
• Programmer Welfare
• Sustainable pace

AnyPoint Studio 7 Beta

 These are some of new features and improvements in Studio 7 beta:

* Improved palette which enables users to more quickly discover what they’re looking for by searching directly for operations and saving favorites.
* Users can now explicitly manage which connectors and modules are associated with a project.
* Connectors and modules are now managed directly by Anypoint Studio, and do not require users to manage update sites.
* Easily navigate to code from visual view by right clicking on a component and clicking “View XML”
* Maven is now embedded out of the box inside Studio. Additionally, every project now has a Maven POM, making it easier to incorporate projects into CI/CD systems.
* Flows and scopes are now collapsable.
* Updated icons make flows easier to read.
* DataSense metadata is now stored in a human readable format this is easier to share, commit and merge.
* Support for importing API specifications from Design Center
* Improved user experience for connector and modules
* Simplified experience to manage credentials when logging into the Anypoint Platform

Amazing Wireframing Tools & Apps

Web

1. Mockingbird – Wireframes on the fly
2. Simulify – Interactive, shareable wireframes, mockups and prototypes
3. Solidify – Create clickable prototypes
4. Concept.ly – Convert wireframes and designs into interactive apps.
5. ClickDummy – Turn mockups into clickable prototypes
6. Creately – Real time diagram collaboration
7. Lumzy – Mockup creation and prototyping tool
8. Cacoo – Diagrams with real time collaboration
9. Mockflow – Great design tools and collaboration services for designers
10. Mockup Designer – Basic wireframing tool hosted on GitHub
11. dub –Denim – DENIM is an outgrowth of the original SILK project, a pen-based sketching tool for designing user interfaces.
12. fluidIA  – A free open source project for prototyping open source projects.
13. Justinmind – Nice wireframing platform for web and mobile apps.
14. UXPin – It puts everything to your fingertips but is a costly tool.
15. RWD Wireframes – Wireframing tool for responsive layouts
16. Gliffy – Drag & Drop from library to anywhere on page, creating wireframes easily.
17. Wireframe.cc – Free tool for creating quick mockups.
18. Pencil Project – This is a free and easy to use open source tool for creating GUI prototyping.
19. Wirify – Converting web page to wireframe is just a click away with wirify.
20. Axure RP – Premium wireframe tool for detailed wireframe creation.
21. PowerMockup – Convert power point to wireframe.
22. JustProto – Premium tool with drag and drop feature to create highly interactive prototypes.
23. FlairBuilder – Premium tool for easy creation interactive wireframes.
24. WireframeSketcher – Instantly creates wireframes, mockups and prototypes for desktop, web and mobile applications.
25. Serena Prototype Composer – Build simple, high fidelity prototypes that look like the real thing.
26. Balasmiq – You can come up with a design and iterate over it in real-time in the course of a meeting.

Android

1. Framer – Modern prototyping tool
2. Indigo Studio – Rapid, interactive prototyping
3. Lucidchart – Simplest and most powerful flowchart software in the world.
4. Frame Box – Easy, simple wireframing
5. Mockups.me – Create and present interactive UI wireframes
6. Grafio – Grafio is a custom modifiable app.

iOS

1. LovelyCharts – Diagramming app with desktop and mobile versions
2. Tiggzi – The only cloud-based platform with visual development tools and integrated backend services
3. Realizer – Interactive presentation prototypes
4. iPhone Mockup – Free basic iphone Mockup tool.
5. iMockups for iPad – Premium wireframing and mockup app.
6. Antetype – Wireframing and prototyping desktop application for Mac.
7. iMock – Good app for creating mockups, more features could be added.
8. JumpChart – Architecture, layout and content planning
9. Mockup Builder – Super-easy prototyping and mockups
10. Live Wires – wireframe & prototype your iPhone and iPad app concepts quickly.
11. AppCooker – AppCooker is a good tool to bring iOS applications to life.
12. UI  Sketcher for iPad – Sketch, refine and share user interface ideas rapidly.
13. Mockabilly – iPhone mockups with genuine iphone behavior
14. Blocks – Create annotated HTML prototypes
15. UX Toolbox – Create, document and share wireframes and prototypes
16. Moqups – A free tool for making high resolution SVG mockups and wireframes.
17. ProtoShare – Good tool for website wireframing.
18. JustinMindPrototyper – Fantastic prototypes for web and mobile apps.
19. Pidoco – Quick premium prototyping for web apps, mobile and enterprise apps.
20. OmniGraffle for Mac – Creates excellent graphic documents.
21. HotGloo – Easy and beautiful way to create mockups.
22. Sketchypad – Easy-to-use interface for creating websites and soft interfaces.

SQL vs MongoDB Terms

SQL Terms/Concepts	MongoDB Terms/Concepts
database	database
table	collection
row	document or BSON document
column	field
index	index
table joins	embedded documents and linking
primary key Specify any unique column or column combination as primary key.	primary key In MongoDB, the primary key is automatically set to the_id field.
aggregation (e.g. group by)	aggregation pipeline

SQL Terms, Functions, and Concepts	MongoDB Aggregation Operators
WHERE	$match
GROUP BY	$group
HAVING	$match
SELECT	$project
ORDER BY	$sort
LIMIT	$limit
SUM()	$sum
COUNT()	$sum
join	No direct corresponding operator; however, the$unwind operator allows for somewhat similar functionality, but with fields embedded within the document.

R Programming

R is a language and environment for statistical computing and graphics.

For more information please refer to http://r-project.org

For Big Data Analytics

Who Uses R?
- Spreadsheet Users
- Programmers
- Statisticians
- Data Scientists


RStudio for R

Will update more information as I learn R...

Android Project Build and Deployment Process steps

Android Version History

Android Version History

• Alpha (1.0)
• Beta (1.1)
• Cupcake (1.5)
• Donut (1.6)
• Eclair (2.0–2.1)
• Froyo (2.2–2.2.3)
• Gingerbread (2.3–2.3.7)
• Honeycomb (3.0–3.2.6)
• Ice Cream Sandwich (4.0–4.0.4)
• Jelly Bean (4.1–4.3.1)
• KitKat (4.4–4.4.4)
• Lollipop (5.0–5.0.2)

1 Pre-commercial release versions (2007–2008)

• 1.1 Alpha
• 1.2 Beta

2 Version history by API level

• 2.1 Android 1.0 (API level 1)
• 2.2 Android 1.1 (API level 2)
• 2.3 Android 1.5 Cupcake (API level 3)
• 2.4 Android 1.6 Donut (API level 4)
• 2.5 Android 2.0 Eclair (API level 5)
  • 2.5.1 Android 2.0.1 Eclair (API level 6)
  • 2.5.2 Android 2.1 Eclair (API level 7)
• 2.6 Android 2.2–2.2.3 Froyo (API level 8)
• 2.7 Android 2.3–2.3.2 Gingerbread (API level 9)
  • 2.7.1 Android 2.3.3–2.3.7 Gingerbread (API level 10)
• 2.8 Android 3.0 Honeycomb (API level 11)
  • 2.8.1 Android 3.1 Honeycomb (API level 12)
  • 2.8.2 Android 3.2 Honeycomb (API level 13)
• 2.9 Android 4.0–4.0.2 Ice Cream Sandwich (API level 14)
  • 2.9.1 Android 4.0.3–4.0.4 Ice Cream Sandwich (API level 15)
• 2.10 Android 4.1 Jelly Bean (API level 16)
  • 2.10.1 Android 4.2 Jelly Bean (API level 17)
  • 2.10.2 Android 4.3 Jelly Bean (API level 18)
• 2.11 Android 4.4 KitKat (API level 19)
  • 2.11.1 Android 4.4 KitKat with wearable extensions (API level 20)
• 2.12 Android 5.0 Lollipop (API level 21)

Key Mobile Challenges

Key Mobile Challenges
- Low Processing Power
- Limited RAM
- Intermittent, Low bandwidth, High Latency data connections
- Impact on battery life