c# barcode generator library free DEPLOYING RUBY APPLICATIONS AND LIBRARIES in Font

Printing Data Matrix in Font DEPLOYING RUBY APPLICATIONS AND LIBRARIES

CHAPTER 10 DEPLOYING RUBY APPLICATIONS AND LIBRARIES
Generating Data Matrix 2d Barcode In None
Using Barcode generator for Font Control to generate, create Data Matrix 2d barcode image in Font applications.
www.OnBarcode.com
Print GTIN - 128 In None
Using Barcode encoder for Font Control to generate, create EAN / UCC - 14 image in Font applications.
www.OnBarcode.com
As with WEBrick and Mongrel, the XML-RPC server can also use other classes directly, as with WEBrick s servlets. For example:
Generating UPC A In None
Using Barcode printer for Font Control to generate, create UPC-A image in Font applications.
www.OnBarcode.com
Encode Barcode In None
Using Barcode creation for Font Control to generate, create Barcode image in Font applications.
www.OnBarcode.com
class OurClass def some_method "Some test text" end end require 'xmlrpc/server' server = XMLRPC::Server.new(1234) server.add_handler(XMLRPC::iPIMethods('sample'), OurClass.new) trap("INT") { server.shutdown } server.serve
Generating Data Matrix 2d Barcode In None
Using Barcode printer for Font Control to generate, create DataMatrix image in Font applications.
www.OnBarcode.com
Quick Response Code Printer In None
Using Barcode encoder for Font Control to generate, create QR Code ISO/IEC18004 image in Font applications.
www.OnBarcode.com
With this server, the methods are associated automatically with the XML-RPC server. A call to sample.some_method from an XML-RPC client would automatically be routed through to the instance method some_method made available from OurClass.
Make PDF-417 2d Barcode In None
Using Barcode generator for Font Control to generate, create PDF 417 image in Font applications.
www.OnBarcode.com
USD8 Creation In None
Using Barcode printer for Font Control to generate, create USD - 8 image in Font applications.
www.OnBarcode.com
DRb stands for Distributed Ruby, and is a Ruby-only RPC library. On the surface, DRb doesn t appear to be too different from XML-RPC, but if you only need to talk between Ruby programs, it s a lot more powerful. Unlike XML-RPC, DRb is object-oriented, and connecting to a DRb server gives the client an instance of a class located on the DRb server. You can then use the methods made available by that class as if they re local methods. A DRb client can be as simple as this:
Drawing ECC200 In Java
Using Barcode creator for Eclipse BIRT Control to generate, create Data Matrix 2d barcode image in BIRT reports applications.
www.OnBarcode.com
ECC200 Generator In Visual Studio .NET
Using Barcode printer for Visual Studio .NET Control to generate, create Data Matrix image in .NET applications.
www.OnBarcode.com
require 'drb' remote_object = DRbObject.new nil, 'druby://:51755' puts remote_object.some_method
Reading Barcode In Visual C#
Using Barcode Control SDK for Visual Studio .NET Control to generate, create, read, scan barcode image in Visual Studio .NET applications.
www.OnBarcode.com
Code 39 Full ASCII Generator In None
Using Barcode encoder for Software Control to generate, create USS Code 39 image in Software applications.
www.OnBarcode.com
Only one line is required to retrieve an instance of a class from a remote DRb server. Whereas with XML-RPC you first create a handle to the server, with DRb you create a handle to a class instance. After you use DRbObject.new, remote_object is a handle to the object served by a specific DRb server (in this case, a local server).
UCC - 12 Generator In .NET
Using Barcode encoder for Visual Studio .NET Control to generate, create EAN / UCC - 13 image in VS .NET applications.
www.OnBarcode.com
Data Matrix Printer In Java
Using Barcode generator for BIRT Control to generate, create Data Matrix 2d barcode image in Eclipse BIRT applications.
www.OnBarcode.com
CHAPTER 10 DEPLOYING RUBY APPLICATIONS AND LIBRARIES
Drawing Barcode In .NET Framework
Using Barcode creation for Reporting Service Control to generate, create Barcode image in Reporting Service applications.
www.OnBarcode.com
Make PDF417 In .NET Framework
Using Barcode printer for Reporting Service Control to generate, create PDF 417 image in Reporting Service applications.
www.OnBarcode.com
Let s look at the server associated with this client:
UPC A Decoder In Visual Studio .NET
Using Barcode recognizer for VS .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Draw UCC.EAN - 128 In VB.NET
Using Barcode maker for .NET framework Control to generate, create UCC.EAN - 128 image in .NET framework applications.
www.OnBarcode.com
require 'drb' class OurClass def some_method "Some test text" end end DRb.start_service nil, OurClass.new puts "DRb server running at #{DRb.uri}" trap("INT") { DRb.stop_service } DRb.thread.join
Code 128 Code Set A Creator In Objective-C
Using Barcode generator for iPhone Control to generate, create Code-128 image in iPhone applications.
www.OnBarcode.com
UCC.EAN - 128 Generator In None
Using Barcode drawer for Microsoft Word Control to generate, create EAN / UCC - 13 image in Microsoft Word applications.
www.OnBarcode.com
It couldn t be simpler. DRb.start_service associates an instance of OurClass with the DRb server, it prints the URL to the DRb server to the screen, and then starts the DRb server and awaits client connections.
Note You need to change the druby:// URL in the client example to match the URL given in output by
the server example.
With DRb, data structures work almost seamlessly across the connection. If your remote classes want to return complex hashes, they can, and they ll be represented perfectly on the client. To an extent, using an object over a DRb connection is transparent, and the object will act as if it were local. This is only a simple overview of the basics of DRb. However, in terms of DRb s basic RPC features, this simple server-and-client example demonstrates the core of DRb s feature set, and you can extend it to almost any complexity. If your code is already written using classes, you might be able to drop DRb in within minutes and immediately get your functionality working from afar.
For another basic DRb tutorial, refer to http://www.chadfowler.com/ruby/drb.html or to the Tip
most recent documentation at http://www.ruby-doc.org/stdlib/libdoc/drb/rdoc/index.html.
CHAPTER 10 DEPLOYING RUBY APPLICATIONS AND LIBRARIES
Summary
In this chapter we ve looked at how to deploy Ruby programs and libraries, as well as how to make their functions available to Web browsers and to other applications over a network. We ve also interrogated the environment so we can pursue different techniques on a per operating-system basis if we choose. Let s reflect on the main concepts covered in this chapter: Shebang line: A special line at the start of a source code file that determines which interpreter is used to process the file. Used primarily on Unix-based operating systems, shebang lines can also work on Windows when used with the Apache Web server. RUBY_PLATFORM: A special variable preset by Ruby that contains the name of the current platform (environment). Environment variables: Special variables set by the operating system or other processes that contain information relevant to the current execution environment and information about the operating system. RubyForge: A centralized repository and Web site dedicated to hosting and distributing Ruby projects and libraries. You can find it at http://rubyforge.org/. CGI: Common Gateway Interface. A standard that enables Web servers to execute scripts and provide an interface between Web users and scripts located on that server. WEBrick: A simple and easy HTTP server library for Ruby that comes with Ruby as standard. Mongrel: A more powerful HTTP server library for Ruby by Zed Shaw that improves significantly upon WEBrick s speed, stability, and overall performance. RPC: Remote Procedure Call. A way to call methods in a different program using a network (either local or the Internet), a transport protocol (such as HTTP), and a messaging protocol (such as XML). XML-RPC: An RPC protocol that uses HTTP and XML for its transport and messaging. SOAP: Simple Object Access Protocol. Another RPC protocol that uses HTTP and XML for its transport and messaging. DRb: Distributed Ruby. A Ruby-only mechanism for implementing RPCs and object handling between separate Ruby scripts. In 15 we re going to return to looking at network servers, albeit in a different fashion, but first, in 11, we re going to take a look at some more advanced Ruby topics to flesh out the ideas we ve covered so far.
Copyright © OnBarcode.com . All rights reserved.