Skip to main content

Home/ SoftwareEngineering/ Contents contributed and discussions participated by kuni katsuya

Contents contributed and discussions participated by kuni katsuya

kuni katsuya

The 4 Most Important Skills for a Software Developer | Javalobby - 0 views

  • The 4 Most Important Skills for a Software Developer
  • Skill 1: Solving Problems
  • It is amazing how bad most developers are at solving problems.
  • ...17 more annotations...
  • problem solving is the base skill of software development.
  • Skill 2: Teaching Yourself
  • There is probably no more important skill in life than learning to learn.
  • especially important in software development, because no field I know of changes more rapidly than software development.
  • need the ability to quickly acquire the knowledge you need for the task at hand.
  • learn how to teach yourself
  • Skill 3: Naming
  • Software development is all about describing the metaphysical
  • Every time you are writing code you are naming things
  • can accurately predict a developer’s skill level by looking at how they have named methods, variables and classes in code they have written
  • A developer who lacks the ability to give good names to concepts and data in their code is like a mute translator
  • focus on giving good names to things
  • most visible thing about your code
  • if I read it and can understand it, I am going to assume you know what you are doing.
  • Skill 4: Dealing with People
  • humans are not logical creatures
  • we are emotional ones
kuni katsuya

Top 10 Lessons Learned From 10 Years in Agile | Agile Zone - 0 views

  • Top 10 Lessons Learned From 10 Years in Agile
  • 1.  Simplicity is Sophistication.  
  • 2.  Define your Rhythm.  
  • ...18 more annotations...
  • start cutting down on wasted meeting time
  • 3. Agile is Fundamentally About Discipline.  
  • areas of planning, unit testing, test driven development, continuous integration, and test automation.
  • 4.  Software is Hard to Scale, Agile is Not.  
  • Focus on business goals
  • 5.  Think of the Big Picture.   
  • success requires a
  • consideration of the system as a whole
  • before making changes to its parts, or else the change will likely be fraught with risk.
  • 6.  Lose the Religion  
  • adapt agile to your need.
  • 7. Continuous Focus on Business Value.
  • get caught in the weeds of a technical story's delivery and velocity at the expense of overall business value, company and project goals
  • 8. Agile - It's Not Just For Software Anymore.
  • 9. Continuous Planning. 
  • Plan on a daily basis if possible
  • Keep your focus on maximizing value
  • 10.  Doing agile and being agile aren’t the same.
kuni katsuya

Changing Bits: Lucene's FuzzyQuery is 100 times faster in 4.0 - 0 views

  • Lucene's FuzzyQuery is 100 times faster in 4.0
  • FuzzyQuery matches terms "close" to a specified base term
  • specify an allowed maximum edit distance, and any terms within that edit distance from the base term
  • ...3 more annotations...
  • FuzzyQuery is great for matching proper names
  • Prior to 4.0, FuzzyQuery took the simple yet horribly costly brute force approach: it visits every single unique term in the index, computes the edit distance for it, and accepts the term (and its documents) if the edit distance is low enough.
  • Levenshtein
kuni katsuya

Listing Directory Contents with JDK 1.7 and NIO.2 : Adam Bien's Weblog - 0 views

kuni katsuya

Open Session in View | Hibernate | JBoss Community - 0 views

  • Open Session in View
    • kuni katsuya
       
      do not do this!  this be an anti-pattern
kuni katsuya

Lazy Loading Entities In Views Challenge--Reader's Question And Answer : Adam Bien's We... - 0 views

  • Lazy Loading Entities In Views
  • class User
  • Address
  • ...10 more annotations...
  • Friend
  • addresses are lazily loaded
  • detached mode already in the controller
  • eagerly loaded
  • It gets ugly pretty quickly
  • JXPath relations
  • Use Fetch Joins they are designed to prefetch lazy relations
  • Anti-Pattern
    • kuni katsuya
       
      DO NOT USE THE OPEN-SESSION-IN-VIEW *ANTI*-PATTERN
  • Use Stateful Session Beans
    • kuni katsuya
       
      do not penalty: death, or at least a public flogging
  • eager load the relations
    • kuni katsuya
       
      just don't hard-code this eager loading behavior by using jpa's FetchType.EAGER when annotating the entity beans if you do, you force all clients of said entity beans to *always* eager fetch everything, even if the client doesn't want/need the full depth/breadth of the object graph to eager load the relations when needed, try fetch joins (see item 5)
kuni katsuya

AnemicDomainModel - 0 views

  • AnemicDomainModel
  • Eric Evans
  • basic symptom of an Anemic Domain Model
  • ...40 more annotations...
  • The catch comes when you look at the
  • behavior
  • there is hardly any behavior on these objects, making them little more than bags of getters and setters
  • I was chatting with
    • kuni katsuya
       
      note, the 'i' here, is mr. MARTIN FOWLER!! and of course, eric evans hails from domain driven design fame
  • fundamental horror
  • it's so contrary to the basic idea of object-oriented design
  • combine
  • data and process together
  • procedural style design
  • completely miss the point of what object-oriented design is all about
  • It's also worth emphasizing that putting behavior into the domain objects
  • should not contradict the solid approach of using layering to separate domain logic from such things as persistence and presentation responsibilities
  • logic that should be in a domain object is domain logic
  • validations
  • calculations
  • business rules
  • One source of confusion in all this is that many OO experts do recommend putting a layer of procedural services on top of a domain model, to form a Service Layer
  • this isn't an argument to make the domain model
  • void of behavior
  • service layer advocates use a service layer in conjunction with a behaviorally rich domain model.
  • does not contain business rules or knowledge, but
  • only coordinates
  • tasks and delegates work to
  • collaborations of domain objects
  • in the next layer down
  • can have state that reflects the
  • progress of a task
  • for the user or the program
  • Domain Layer
  • Application Layer
  • Service Layer
  • Responsible for
  • representing concepts of the business
  • business rules
  • This layer is the heart of business software
    • kuni katsuya
       
      ... and has the *most value* to an organization investing in writing their own software infrastructure software (eg. user interface, orm, application server-related frameworks) or plumbing code should be treated as commodities where possible, unless, the business consciously decides that a custom, home-grown implementation is absolutely required for patenting or other differentiation reasons and/or that no existing off-the-shelf solution can be used but these cases should be rare! do not blindly fall for the not-invented-here syndrome
  • all the key logic lies in the domain layer
  • I don't know why this anti-pattern is so common
  • if they come from a
  • data background
    • kuni katsuya
       
      this is why during every sprint, i reiterate that the data model up approach to designing the system is OH SO WRONG but nobody listens
  • J2EE's Entity Beans
    • kuni katsuya
       
      damn baggage from  eons ago!!!
kuni katsuya

Anemic domain model - Wikipedia, the free encyclopedia - 0 views

  • objects containing only data
    • kuni katsuya
       
      ie. dumb data structures with little or no behavior
  • objects containing only code
    • kuni katsuya
       
      ie. classes that are just containers for methods that implement the behavior part of the domain objects (aka the procedures)
  • Martin Fowler, who considers the practice an anti-pattern
  • ...14 more annotations...
  • Benefit
    • kuni katsuya
       
      none
  • Liabilities
    • kuni katsuya
       
      lots
  • Logic cannot be implemented in a truly object-oriented way
    • kuni katsuya
       
      for example, polymorphic behavior
    • kuni katsuya
       
      dammit, can't change highlight color if there's also a sticky note attached!!! arrgggghhhh!!! diigo plugin bug!!
  • Violation of the encapsulation
  • domain model's objects cannot guarantee their correctness
  • validation and mutation logic is placed somewhere outside
    • kuni katsuya
       
      instead of, say, attaching validation 'behavior' directly on, but still decoupled from domain classes themselves (eg. validation rule annotations on jpa entity beans)
    • kuni katsuya
       
      dammit, can't change highlight color if there's also a sticky note attached!!! arrgggghhhh!!! diigo plugin bug!!
  • Necessitates a service layer when sharing domain logic across differing consumers of an object model.
  • Makes a model less expressive and harder to understand.
  • Facilitates code duplication among transactional scripts and similar use cases, reduces code reuse.
  • Liabilities
  • Liabilities
  • Liabilities
  • Liabilities
  • Liabilities
kuni katsuya

How To Configure Java EE 6+ Applications ...Without XML : Adam Bien's Weblog - 0 views

  • How To Configure Java EE 6+ Applications ...Without XML
  • with @Inject:
  • See also page 98 "Configuration Over Convention with Inversion of Control" in Real World Java EE Night Hacks--Dissecting the Business Tier.]
kuni katsuya

Dependency injection discourages object-oriented programming? @ Blog of Adam Warski - 0 views

  • Dependency injection discourages object-oriented programming?
  • if you’re using DI, and you have an X entity, do you have an XService or XManager with lots of method where X is the first argument?
    • kuni katsuya
       
      evidence of the anti-pattern of procedural design in a java ee6 cdi application
  • previous way is more procedural
    • kuni katsuya
       
      ie. ProductService.ship(Product,Customer)
  • ...12 more annotations...
  • service/manager is a set of procedures you can run, where the execution takes a product and a customer as arguments
  • better
  • OO approach
  • not saying that achieving the above is not possible with a DI framework
  • only that DI
  • encourages the ProductService approach
    • kuni katsuya
       
      well, dependency injection, but moreover, the soa approach to service design tends to force otherwise intelligent software engineers into doing procedural design the services just end up being bags of method calls that implement any type of behavior, with the domain objects or entity beans being reduced to mere data structures with little responsibility or behavior beyond persistence. (which, in this anti-pattern, is typically mostly provided by the repository or dao class! ie. domain object crud)
  • it’s just easier
    • kuni katsuya
       
      ... if you just blindly follow the anti-pattern, of course  ;)
  • many benefits
    • kuni katsuya
       
      with the procedural approach, you also cannot implement polymorphic behavior, for instance
  • builder
  • fluent interface
  • it’s not for small projects
    • kuni katsuya
       
      fuckwhat? small or big matters not. if di is applied poorly, regardless of project size, it's an anti-pattern! disregard these comments!
  • problems with DI frameworks:
    • kuni katsuya
       
      not sure i agree with these points, but will refuse in a later sticky note
kuni katsuya

TH03-EP01-US001 - Media Management, Media Upload, Media Item Fields (Groomed BE21, FE8)... - 0 views

  • Associated with
    • kuni katsuya
       
      ?
  • viewed by users
    • kuni katsuya
       
      and available to all legacy content distribution services (eg. oms, viewers, vscape, etc)
kuni katsuya

TH01-EP03-US001 - Property Mgmt, Edit Location & Directions, Location Type and Descript... - 0 views

  • LOC code
    • kuni katsuya
       
      enumeration of location types defined in ota code table under LOC codes
kuni katsuya

TH01-EP03-US004 - Property Mgmt, Edit Location & Directions, Content Mgmt - Projects - ... - 0 views

  • Property Mgmt
  • Property Mgmt
  • Property Mgmt
  • ...18 more annotations...
  • Property Mgmt
  • Property Mgmt
  • Property Mgmt
  • As a user
    • kuni katsuya
       
      with what granted roles? from which organization?
  • ability to see
    • kuni katsuya
       
      permissions required: retrieve these resource types
  • Location Type
  • Description
  • Airports
  • belonging to other organizations
    • kuni katsuya
       
      content (license) owned by organization different than user's
  • clone this information
    • kuni katsuya
       
      clone = retrieve, then create ie. required permissions: {retrieve,create:}
  • have the rights
    • kuni katsuya
       
      generally speaking, there can be a few independent but overlapping mechanism that will control who is allowed to do what with content: 1. any subject's access to the content itself can be controlled via authorization rules (ie. required vs granted permissions) enforced via system-wide resource-based access control 2. content licensors (~content owners) can restrict the usage of their content by: * whom - ie. content licensee (legally/commercially represented by an organization) * how - eg. reuse as unmodified, create derivatives, composite, redistribute, etc * where - ie. distribution channels their content can be used (eg. only on hotel's vbrochure site, but not in any ids/gds channels) * when - temporal restrictions may limit scope of content license grant by: start, end, duration, season, etc 3. content licensees can further filter or funnel content available to them (resulting from a combination of license granted to them and access control) based on their own criteria (eg. generate a templated hotel presentation only if: at least 1 textual description, 5 photos and 1 video for a hotel is available with a license to combine them (composite content)
  • see how other organizations describe the property
    • kuni katsuya
       
      permission required: retrieve hotel descriptive content(?) owned by independent organization
  • Property Mgmt
  • which textual information
  • displayed
    • kuni katsuya
       
      displayed where? on specific channels?
  • ECM will ask user to confirm that the user has rights to use that content
    • kuni katsuya
       
      if ecm/vfml is to manage content licensing as a third party between organizations (content licensors & licensees) shouldn't ecm *know* if the user('s organization) has rights to use the content in question? is this question posed to the user (with required explicit acknowledgement) purely to absolve vfml from liability issues that may result from licensing disagreements?
  • property’s
    • kuni katsuya
       
      this being the user's (organization's) 'version'or 'view'of the hotel, since this user normally wouldn't/shouldn't be granted permissions to replace content for a hotel on a different organization's 'view'or 'version' of the same hotel
  • to see the user’s original content
    • kuni katsuya
       
      this implies that *at least* one version of such (temporarily) replaceable content needs to be managed/maintaned to allow reverting what if, deliberately, ignorantly or maliciously, a user replaces the same piece of--textual or any type, really--content for this hotel n times? will all n versions be required to be managed as an undo history? the user's ''original content'' might have been version 1, but equally might have been 1 mean: - previous version of the content, regardless of which user - initial version of that content attached to the hotel regardless of which user created/updated it and ignoring which organization owns it?, or, -
kuni katsuya

TH02-EP02-US003 - VFML Admin, Org Mgmt, Create Organization - Projects - Confluence - 0 views

  • Org Mgmt
  • create a new organization
  • onboard a new client
    • kuni katsuya
       
      ie. create customer's root authorization context under vfml
  • ...1 more annotation...
  • VFML user
    • kuni katsuya
       
      authorization
  •  
    " create a new organization"
kuni katsuya

TH02-EP02-US004 - VFML Admin, Org Mgmt, Sync Properties - Projects - Confluence - 0 views

  • using EXCC
    • kuni katsuya
       
      why is excc required as the mechanism?
  • sync properties
    • kuni katsuya
       
      sync meaning: a. ensuring that chain-hotel relationships based on icpm data is represented the same way in the cube node structure? (eg. which hotels belong under which chains, and to keep dynamically/automatically updated as hotels are added/removed from chains) 2. or...?
  • As a VFML user
    • kuni katsuya
       
      implies restriction of this action via authorization controls (ie. required vs granted permissions)
  • ...1 more annotation...
  • maintain an accurate listing of properties in an org
    • kuni katsuya
       
      ie. cube node-org-chain tree reflects icpm relationships exactly & always
« First ‹ Previous 261 - 280 of 1268 Next › Last »
Showing 20 items per page