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Topic: Proxy pattern

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	Proxy Pattern
		Our last prototype in command pattern fulfill all the requirement except that we should change the sigle-user, nondistributed spreadsheet into a multi-user one.
		Proxy may refer to a Subject if the RealSubject and Subject interfaces are the same.
		remote proxies are responsible for encoding a request and its arguments and for sending the encoded request to the real subject in a different address space.
	www.cs.mcgill.ca /~hv/classes/CS400/01.hchen/doc/proxy/proxy.html (620 words)

	Thomas Chau's Web Site > Course Works (Site not responding. Last check: )
		In Gamma's words, the intent of the Proxy pattern, also known as the Surrogate pattern, is to provide a placeholder for another object.
		After studying this pattern, I found the Proxy pattern to be very similar to the ValueObject pattern in enterprise application such as EJB application.
		The use of Protection Proxy of Smart Reference is also very similar to the Facade pattern in that both performs the role of controlling access to the underlying object.
	sern.ucalgary.ca /~chauth/courses/seng60904/proxy.htm (551 words)

	GoF Design Pattern:: Behavioural::Proxy (Site not responding. Last check: )
		Proxy object generally shares a common interface or superclass with the service- providing object, allowing a proxy object to substitutes the actual service-providing object.
		Proxy provides a replacement for a subject when it is not feasible to access the subject directly (i.e.
		Proxy is a very general pattern that occurs in many other patterns (i.e.
	pages.cpsc.ucalgary.ca /~chi/SENG/609_04/ProxySummary.html (468 words)

	Proxy article - Proxy proxy representative proxy server design pattern proxy pattern - What-Means.com (Site not responding. Last check: )
		in climate research, a proxy is a measured variable used to infer the value of a variable of interest.
		This is a disambiguation page; that is, one that points to other pages that might otherwise have the same name.
		Proxy article - Proxy definition - what means Proxy
	www.what-means.com /encyclopedia/Proxy (131 words)

	Proxy Pattern (Site not responding. Last check: )
		The Proxy pattern can serve as an intermediary or substiture to make the interface for this class available, while providing a degree of control while enhancing or replacing certain functionality.
		The client uses the interface to the proxy as if it were the interface to the target class, therefore the proxy should implement the same interface as the target class.
		The general pattern for the Proxy pattern is as follows:
	users.wpi.edu /~ppiselli/ProxyPattern.html (258 words)

	SENG 609.04
		The Proxy Pattern is a structural pattern and is also known as the Surrogate pattern.
		Proxy pattern provides a solution to avoid creating all these expensive objects like large raster images at once when the document is opened.
		The Proxy pattern can be applied when ever there is a need for a more versatile or sophisticated reference to an object.
	www.ucalgary.ca /~samulee/seng60904/proxy.html (469 words)

	Proxy Pattern
		Simply speaking, a Proxy object is one through which we control access to the actual object on which the functionality lies.
		This proxy object could check for the client's access permission before allowing methods to be executed on the actual object.
		KCS: The Proxy Class in Java and C# is the only way I know of to dynamically inherit an already instantiated object, and, in effect, create a sort of "Runtime Multiple Inheritance".
	c2.com /cgi/wiki?ProxyPattern (386 words)

	design:adapters_and_proxy_patterns [phpPatterns]
		The proxy pattern is very similar in concept to the adapter pattern - it provides a common API for multiple objects which could be varying in nature.
		Perhaps the best example of a proxy pattern (that I’ve come across) in PHP is XML-RPC Class Server, which allows you to turn a collection of PHP classes into XML-RPC methods for remote invokation over a network, using the URL as the means to send a method name and associated parameters.
		The proxy API is returning an object which we can they use to class SOAP methods by name (whether this strictly adheres to the definition of a proxy patterns I can’t say - but I like it!).
	www.phppatterns.com /docs/design/adapters_and_proxy_patterns (1328 words)

	C# Design Patterns: The Proxy Pattern > Sample Code (Site not responding. Last check: )
		The Proxy pattern is used when you need to represent an object that is complex or time consuming to create with a simpler one.
		A Proxy usually has the same methods as the object it represents, and once the object is loaded, it passes on the method calls from the Proxy to the actual object.
		Proxies can also be used to distinguish between requesting an instance of an object and the actual need to access it.
	www.informit.com /isapi/product_id~{E0D7BDEC-99DB-48CE-90D3-596B55607824}/content/index.asp (1021 words)

	Proxy Design Pattern (Site not responding. Last check: )
		Proxy pattern describe how to provide a level of indirection to an object, and the implementations of the proxy object keep a reference to another object to which they forwards requests.
		Proxy focuses on one relationship - between the proxy and its subject - and that relationship can be expressed statically.
		Proxy is appicable whenever there is a need for a versatile or sophisticated reference to an object than a simple pointer.
	www.inf.bme.hu /ooret/1999osz/DesignPatterns/Proxy4 (293 words)

	Implementing the Proxy Design Pattern In .Net
		The Proxy design pattern shows a way to do just in time loading of objects that would consume too much memory to keep around, or takes a lot of time to load.
		A remote proxy provides a local representative for an object in a different address space.[GOF208] This proxy is used to send requests to remote object and any data the remote object needs.
		A protection proxy controls access to the original object.[GOF208] This proxy is used to control access to an object based on some kind of client permissions.
	blogs.vbcity.com /jspano/articles/196.aspx (514 words)

	Take control with the Proxy design pattern - Java World
		The Proxy pattern is one of the most important design patterns because it provides an alternative to extending functionality with inheritance.
		For the Decorator pattern, you use composition instead of delegation, because delegation requires the enclosed object to be aware of its enclosing object.
		One of the Decorator pattern's main attractions is that enclosed objects (and the objects that use the decorators) are oblivious to decorators.
	www.javaworld.com /javaworld/jw-02-2002/jw-0222-designpatterns.html (3413 words)

	SENG 609.04 - Proxy Pattern (Site not responding. Last check: )
		The Proxy pattern "provides a suggrogate or placeholder for another object to control access to it." [GoF,1995] Sometimes it is nessasary to control access to certain object for perfmance or for security reasons.
		The proxy pattern can be useful in graphics where not all image objects are viewed and creating every object at startup can be expensive.
		The proxy pattern could be useful also for maintaining a secure access to the object.
	pages.cpsc.ucalgary.ca /~jadalow/seng60904/proxy.html (211 words)

	Proxy pattern (Site not responding. Last check: )
		representing a complex object by a simpler one called the "proxy"
		proxy usually has same methods as real object
		proxy takes method calls and passes them on to the 'real' object
	www.cs.arizona.edu /classes/cs335/summer02/patterns/Proxy.html (50 words)

	Design Pattern Questions
		A proxy pattern is used when we need to represent a complex object by a simpler one.
		A bridge is a structural pattern that influences the creation of a class hierarchy by decoupling an abstraction from the implementation.
		We could then use a behavioral pattern such as strategy to couple together a family of policies to be used depending on the classes.
	www.cs.unc.edu /~aikat/courses/204/patterns (3032 words)

	Pattern Discussions
		The Singleton pattern is often paired with the Abstract Factory pattern.
		For non-creational pattern, Façade may be used with Singleton pattern in case one single instance of interface to a set of interfaces in the subsystem is needed.
		It would still be Adapter because a proxy is usually used as a virtual placeholder for the real subject or to restrict access not as an interface to some classes.
	www.cs.unc.edu /~jeong/204/Patterns (3084 words)

	hibernate.org - Proxy Visitor Pattern
		Proxies are created dynamically by subclassing your object at runtime.
		The subclass has all the methods of the parent, and when any of the methods are accessed, the proxy loads up the real object from the DB and calls the method for you.
		The Visitor pattern is a "Gang of Four" design pattern that allows you to manipulate a collection of polymorphic objects without all the messy typecasts and instanceof operations.
	www.hibernate.org /280.html (1878 words)

	Proxy
		Design a surrogate, or proxy, object that: instantiates the real object the first time the client makes a request of the proxy, remembers the identity of this real object, and forwards the instigating request to this real object.
		A remote proxy provides a local representative for an object that resides in a different address space.
		By defining a Subject interface, the presence of the Proxy object standing in place of the RealSubject is transparent to the client.
	home.earthlink.net /~huston2/dp/proxy.html (649 words)

	design-nation.blog/en: An example of the proxy pattern
		Patterns are often so related in their intent that it doesn't much matter what you call it.
		This is more appropriate as the pattern allows for the strategy to be configured on the outside of and passed in to the context and it takes the responsibility of managing and keeping track of the connection state out of the IO mechanism.
		Patterns are not meant to be strict sets of rules that can never be broken.
	www.design-nation.net /en/archives/000360.php (1338 words)

	TWiki . Javapedia . ProxyPattern (Site not responding. Last check: )
		The Proxy pattern is one of the most interesting and most used DesignPatterns.
		The target of this pattern is to define the proxy object, that act between client and real subject to control access to the real subject and to perform necessary tasks every time the real subject is accessed.
		The Proxy translates the client’s queries in remote calls, gets the results of the query from remote object and forwards them to the client.
	wiki.java.net /bin/view/Javapedia/ProxyPattern (298 words)

	Design Pattern: Proxy
		The proxy pattern is described as one which "decouples clients from their servers by creating a local proxy, or stand-in, for the less accessible server.
		One use for this pattern in the IEC 61499 context is to utilize service interface function blocks (SIFBs) as proxies for functions of devices that may not themselves be compliant to the standard.
		The devices may then be populated with SIFBs that serve as local proxies for the actual interfaces located on the sensor/actuator links.
	www.holobloc.com /doc/despats/proxy (235 words)

	When Symbian met Design Patterns (2) -- Proxy Pattern \| NewLC
		You don't know whether the proxy server connects other servers to download the contents and then forward to you or connect to the internet directly.
		Proxy is the one who do the real job.
		Proxy could be replaced, it's very important, Mike may let Carol to do the same job if she is drunk I guess.
	www.newlc.com /when-symbian-met-design-patterns-2-proxy-pattern (982 words)

	[No title]
		This Proxy is used to access expensive objects, such as objects high in storage, access time, or another limit resource, created on demand.
		Both Protected Proxies and Smart References allow additional housekeeping tasks when an object is accessed.¡[Zó¨%Proxy Pattern: Distinguishing Aspects¡&&$¨! The Proxy is a stand in for a Subject when it is inconvenient or undesirable to access the Subject directly, as it may be on a remote machine, has restricted access, or is persistent.
		The Proxy pattern models a one to one relationship and this relationship is a static relationship.¡""ªøêrqõ ûpçv
	www.darkpact.com /school/461/dp_proxy.ppt (1021 words)

	JAVA DESIGN PATTERNS, Structural Patterns - Proxy Pattern
		The proxy pattern is used when you need to represent a complex with a simpler one.
		Let’s try and understand this pattern with the help of a non-software example as we have tried to do throughout this article.
		We can see here that creation of object of Bank is very costly, effort and time wise, and so, we can as well use a proxy called ATM to get the result.
	www.allapplabs.com /java_design_patterns/proxy_pattern.htm (537 words)

	[No title]
		This pattern is a stand alone document and is structured in the format specified in the eb SOA Specification, in the section on Patterns Meta Model.
		Since the service proxy can be based on open and commonly used standards, the investment may be also reused should the business decide to integrate their systems with constituents in other vertical sectors Dynamic Behavior The pattern is event driven, like any other pattern in a service oriented architecture.
		One advantage of having this token in the message header may be an ability to trap it during a quick event style parse stream and to quickly redirect the message to the appropriate application to handle the content.
	www.oasis-open.org /archives/ebsoa/200502/doc00006.doc (2743 words)

	Proxy Design Pattern in C# and VB.NET.
		provides an interface identical to Subject's so that a proxy can be substituted for for the real subject.
		code demonstrates the Proxy pattern which provides a representative object (proxy) that controls access to another similar object.
		code demonstrates the Proxy pattern for a Math object represented by a MathProxy object.
	www.dofactory.com /Patterns/PatternProxy.aspx (303 words)

	Proxy Pattern (Site not responding. Last check: )
		Java's Remote Method Invocation(RMI) enables you to call methods on a proxy object, which forwards the calls to the real object on a remote machine.
		The Proxy pattern was implemented in this project, simply because the client application needs to get information from an object which runs on a remote machine.
		This is much more elegant that using Sockets to communicate between remote objects, as a protocol would have to be devised to parse the input and output.
	www.redbrick.dcu.ie /~hego/technicalmanual/node18.html (78 words)

	proxy concept from the Object Oriented Software Engineering knowledge base (Site not responding. Last check: )
		has definition A pattern found in which a lightweight object stands in place of a heavyweight object that has the same interface.
		A related problem is this: If you load one object from a database or server, how can you avoid loading all the other objects that are linked to it.
		The «Proxy» has the same interface as the «HeavyWeight», so programmers can declare variables without caring whether a «Proxy» or its «HeavyWeight» version will be put in the variable.
	www.site.uottawa.ca:4321 /oose/proxy.html (417 words)

	An Introduction to Building Proxy Classes with PHP 5
		In this case, I'm referring specially to the proxy pattern, which offers many interesting features that can help to reduce significantly the overhead of an application.
		Well, in short, in the proxy pattern, one object is created by another only when the functionality of the first one is required.
		For this pattern in particular, the object called "proxy" is responsible for handling all the accesses to another class, something that looks very similar to the behavior of different proxy servers.
	www.devshed.com /c/a/PHP/An-Introduction-to-Building-Proxy-Classes-with-PHP-5 (631 words)

	CGIProxy-- HTTP/FTP Proxy in a CGI Script
		When an HTML resource is retrieved, it's modified so that all links in it point back through the same proxy, including images, form submissions, and everything else.
		I didn't follow the spec on HTTP proxies, and there are violations of the protocol.
		This is set to a list of patterns that match URLs for which you want this treatment.
	www.jmarshall.com /tools/cgiproxy (2476 words)

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