1. Enrichment of existing content is not straight forward. You have to reload the content.
2. No support for XQuery.
3. Content transformation is not there.
2. No support for XQuery.
3. Content transformation is not there.
Saturday, May 5, 2012
XML-RPC Vs SOAP Vs REST
SOAP
SOAP was the acronym ofSimple Object Access Protocal but this acronym was dropped in the version of 1.2 of SOAP. It is method for exchanging XML based message over the Internet for providing and consuming web services. SOAP message are transferred forming the SOAP-Envelope.You can view the typicalSOAP Message articture from here. SOAP is widely criticized for it’s design complexity.
In PHP 5, there is built-in extension for the providing and consuming web services. But, I personally preferNusoap toolkit of PHP for providing and consuming web services using SOAP in PHP.
XML-RPC
XML-RPC (remote procedure call) another way of providing and consuming web services. It uses XML to encode and decode the remote procedure call along with it’s parameter. Compared to the articture of SOAP, it has simpler architecture. You can even define data type of parameters of procedure in XML-RPC. You can visit the official websitewww.xmlrpc.com to know more about XML-RPC.
In PHP, there is extension which contain various functions for facilating XML-RPC request and response. But the functionsxmlrpc_encode_request() andxmlrpc_decode_request() available in PHP is very useful for when it comes to encode and decode XML-RPC request and response.
REST
Representational State Trasfer(REST) is comparatively simpler method for providing and consuming web services. Nowadays, this method is becoming popular in the arena of web services. Unlike above two method, it is not necessary to use XML as a data interchange format in REST. REST architecture is basically focused on two things :Resources andInterface.RESTful is another term to define REST web services .
Resources are application’s state and functionality which is represented by a unique URL. The resources share a uniform interface to transfer the state between the client and server.
For example the URL, http://example.com/product/11 can be aresource.Suppose, GET method is used to retrieve product detail from that URL, POST method is used to modify the production information and DELETE method can be used to delete the product from the same URL. Here, the HTTP methods works as a interface to access the resources.
Talking about PHP, the format of information(representation) returned can be in XML, JSON or even in HTML format.DOM functions, SimpleXML functions and JSON functions comes handy when you are handling RESTful interfaces in PHP.
Ref:
Ref:
http://en.wikipedia.org/wiki/REST
Tips and Tricks
1. What is a Templating language?
2. What is a Vortal (vertical portal)?
More:
Velocity is a viable alternative to Java Server Pages (JSPs) or PHP - http://velocity.apache.org/engine/releases/velocity-1.5/user-guide.html
FreeMarker: An open alternative to JSP - http://www.javaworld.com/javaworld/jw-01-2001/jw-0119-freemarker.html
Different types of portals - http://en.wikipedia.org/wiki/Web_portal
3. What is Lay-by? - http://www.accc.gov.au/content/index.phtml/itemId/815403
4. What is a sticky session? -
Sticky session refers to the feature of many commercial load balancing solutions for web-farms to route the requests for a particular session to the same physical machine that serviced the first request for that session. This is mainly used to ensure that a in-proc session is not lost as a result of requests for a session being routed to different servers. Since requests for a user are always routed to the same machine that first served the request for that session, sticky sessions can cause uneven load distribution across servers.
(Source: http://dev.fyicenter.com)
5. What is Denial of Service?
Denial of service (DoS) usually refers to an attack that
attempts to make a computer resource unavailable to its intended users by
flooding a network or server with requests and data. It can also simply refer to
a resource, such as e-mail or a Web site, that is not functioning as usual.
Often, the denial is accidental rather than a planned attack, resulting from too
many legitimate requests. However, malicious DoS attacks are still prevalent
against network devices, and a newer breed of DoS attack targeted specifically
at applications is becoming more and more common.
6. Are UNIX and Linux same?
Linux has never been certified as being a version of UNIX, so it is described as being "Unix-like." http://www.cyberciti.biz/faq/what-is-the-difference-between-linux-and-unix/
7. Load balancing -
Most commonly,
the term load balancing refers to distributing incoming HTTP requests across Web
servers in a server farm, to avoid overloading any one server. Because load
balancing distributes the requests based on the actual load at each
server, it is excellent for ensuring availability and defending against denial
of service attacks.
More:
8. Is JSP technology considered to be a deprecated presentation technology?
JSP technology is considered to be a deprecated presentation technology for JavaServer Faces. Facelets is a part of the JavaServer Faces specification and also the preferred presentation technology for building JavaServer Faces technology-based applications (Source: http://docs.oracle.com/javaee/6/tutorial/doc/giepx.html)
8.Is there something like a super
version of Java? - http://groovy.codehaus.org/
More:
Groovy Web Console: Guillaume Laforge, the project lead
of the Groovy scripting language created a Groovy Web Console (http://groovyconsole.appspot.com/) which is public for all on Google's App Engine. It
allows everybody to quickly try out some scripts.
10. Web Services, SOAP vs. REST - http://www.ajaxonomy.com/2008/xml/web-services-part-1-soap-vs-rest
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