Lwaits's List: SF-External

• a software development environment based on the Oracle database.^[1
• Oracle Application Express (Oracle APEX
• how well an application scales is primarily based on the efficiency of the SQL queries used by the application developer
• When tasked with building an internal web calendar, Mike enlisted the help of Joel Kallman and started "Flows".

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• application programming interface (API) is a particular set of rules and specifications that software programs can follow to communicate with each other. It serves as an interface between different software programs and facilitates their interaction, similar to the way the user interface facilitates interaction between humans and computers.

  •  as a way of defining their "vocabularies" and resources request conventions 

  • application programming interface (API) is a particular set of rules and specifications that software programs can follow to communicate with each other. It serves as an interface between different software programs and facilitates their interaction, similar to the way the user interface facilitates interaction between humans and computers.

• The behavior of the functions is usually described in more details in a human readable format in printed books or in electronic formats like the man pages: e.g. on Unix systems the command

   

  • C language 
• Hence the API in this case can be interpreted as the collection of the included files used by the C language and its human readable description provided by the man pages.
• behavior is the set of rules for how an object, derived from that class, will act in a given circumstance
• description of a set of class definitions, with a set of behaviors associated with those classes
• es that are implemented in terms of class methods
• The quality of the documentation associated with an API is often a factor determining its success in terms of ease of use.
• API provides a library to be used directly: hence there can be no transport
• protocol is that the protocol defines a standard way to exchange requests and responses based on a common transport
• nly simple information exchange via function calls
• Protocols are usually shared between different technologies (system based on given computer programming languages in a given operating system)
• APIs are specific to a given technology
• used in the context of web development, an API is typically a defined set of Hypertext Transfer Protocol (HTTP) request messages
• been moving away from Simple Object Access Protocol (SOAP) based services towards more direct Representational State Transfer (REST) style communications.
• A compatible API, on the other hand, allows compiled object code to function without any changes to the system implementing that API.

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• OpenSocial is a set of common application programming interfaces (APIs)

• Open API (often referred to as OpenAPI new testnology)
• or. Open API also applies to collaborative services environments where managed service providers can also outsource specific services to other providers via systems integration.

• • Web API (Application Programming Interface)

• defines a "Web service" as "a software system designed to support interoperable machine-to-machine interaction over a network
• Web Services Description Language (WSDL).
• Web API is a development in Web services (in a movement called Web 2.0) where emphasis has been moving away from SOAP based services towards Representational State Transfer (REST) based communication
• Web APIs allow the combination of multiple Web services into new applications known as mashups
• The user has no control over these service
• The three most common styles of use are RPC, SOAP and REST
• Web services are a set of tools
• RPC Web services present a distributed function (or method) call interface
• basic unit of RPC Web services is the WSDL
• basic unit of communication is a message
• to implement an architecture according to service-oriented architecture (SOA) concepts,
• REST attempts to describe architectures that use HTTP or similar protocols by constraining the interface to a set of well-known, standard operations (like GET, POST, PUT, DELETE for HTTP)
• focus is on interacting with stateful resources, rather than messages or operations
• WSDL version 2.0 offers support for binding to all the HTTP request methods (not only GET and POST as in version 1.1)
• generate WSDL for existing classes (a bottom-up strategy) or to generate a class skeleton given existing WSDL (a top-down strategy).
• bottom up method writes implementing classes first
• WSDL document first and then uses a code generating tool to produce the class skeleton,
• produce cleaner designs

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• For each object that you see, ask yourself two questions: "What possible states can this object be in?" and "What possible behavior can this object perform?".
• two possible behaviors (turn on, turn off),
• your desktop radio might have additional states (on, off, current volume, current station)
• your desktop lamp may have only two possible states (on and off)
• behavior (turn on, turn off, increase volume, decrease volume, seek, scan, and tune).
• object stores its state in   fields
• Methods operate on an object's internal state and serve as the primary mechanism for object-to-object communication.

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• your bicycle is an  instance
• class is the blueprint from which individual objects are created
• of the class of objects known as bicycles
• class Bicycle

  • blueprint
• because it's not a complete application; it's just the blueprint for bicycles that might be used in an application
• may have noticed that the Bicycle class does not contain a main method
• responsibility of creating and using new Bicycle objects belongs to some other class in your application
• BicycleDemo  class that creates two separate Bicycle objects and invokes their methods:
• class BicycleDemo

  • Class that creates the object
• Bicycle
• bike1
• Bicycle
• bike2
• Bicycle
• bike1.changeCadence(50);  bike1.speedUp(10);  bike1.changeGear(2);  bike1.printStates();
• bike2.changeCadence(50);  bike2.speedUp(10);  bike2.changeGear(2);  bike2.changeCadence(40);  bike2.speedUp(10);  bike2.changeGear(3);  bike2.printStates();
• cadence:50 speed:10 gear:2
• cadence:40 speed:20 gear:3

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• Mountain bikes, road bikes, and tandem bikes, for example, all share the characteristics of bicycles (current speed, current pedal cadence, current gear)
• Different kinds of objects often have a certain amount in common with each other.
• also defines additional features that make them different: tandem bicycles have two seats
• Object-oriented programming allows classes to inherit commonly used state and  behavior from other classes.
• Bicycle now becomes the superclass of  MountainBike, RoadBike, and TandemBike
• Java programming language, each class is allowed to have one direct superclass, and each  superclass has the potential for an unlimited number of subclasses:
• eginning of your class declaration, use the extends keyword, followed by the name of the class to inherit from
• The syntax for creating a subclass is simple.
• class MountainBike extends Bicycle
• This gives MountainBike all the same fields and methods as Bicycle, yet allows its code to focus exclusively on the features that make it unique
• you must take care to properly document the state and behavior that each superclass defines

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• Methods form the object's interface with the outside world
• the buttons on the front of your television set, for example, are the interface between you and the electrical wiring on the other side of its plastic casing. You press the "power" button to turn the television on and off.
• bicycle's behavior, if specified as an interface
• most common form, an interface is a group of related methods with empty bodies
• interface Bicycle
• To implement this interface, the name of your class would change    (to a particular brand of bicycle, for example, such as ACMEBicycle),
• you'd use the implements keyword in the class declaration
• class ACMEBicycle implements Bicycle
• Interfaces form a contract between the class and the outside world, and this contract is enforced at build time by the compiler
• ctually compile the ACMEBicycle class, you'll need to add the public keyword to the beginning of the implemented interface methods. You'll learn the reasons for this later in the lessons on   Classes and Objects  and   Interfaces and Inheritance.

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• A package is a namespace that organizes a set of related classes and interfaces.
• Conceptually you can think of packages as being similar to different folders on your computer.
• images in another
• HTML pages in one folder
• cripts or applications in yet another
• Java platform provides an enormous class library (a set of packages) suitable for use in your own applications
• library is known as the "Application Programming Interface", or "API"
• Its packages represent the tasks most commonly associated with general-purpose programming
• String object contains state and behavior for character strings
• File object allows a programmer to easily create, delete, inspect, compare, or modify a file on the filesystem
• Socket object allows for the creation and use of network sockets;
• thousands of classes to choose from
• Java Platform API Specification contains the complete listing for all packages, interfaces, classes, fields, and methods supplied by the Java Platform 6, Standard Edition.

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• objects store their state
• "variable"
• operators of the Java programming language
• ; statements may be grouped into blocks
• expressions are the core components of statements
• Operators may be used in building expressions
• e decisions-making, looping, and branching statements that enable your programs to conditionally execute particular blocks of code
• control flow statements

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• void if the method does not return a value

• ou can use any data type for a parameter of a method  or a constructor.
• reference data types,  such as objects and arrays.
• Point is a class that represents an x,  y coordinate
• Point objects

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