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Efficient proxies in Smalltalk

Authors:

Mariano Martinez Peck,

Noury Bouraqadi,

Stéphane Ducasse,

Luc FabresseAuthors Info & Claims

IWST '11: Proceedings of the International Workshop on Smalltalk Technologies

Article No.: 8, Pages 1 - 16

https://doi.org/10.1145/2166929.2166937

Published: 23 August 2011 Publication History

Abstract

A proxy object is a surrogate or placeholder that controls access to another target object. Proxy objects are a widely used solution for different scenarios such as remote method invocation, future objects, behavioral reflection, object databases, inter-languages communications and bindings, access control, lazy or parallel evaluation, security, among others.

Most proxy implementations support proxies for regular objects but they are unable to create proxies for classes or methods. Proxies can be complex to install, have a significant overhead, be limited to certain type of classes, etc. Moreover, most proxy implementations are not stratified at all and there is no separation between proxies and handlers.

In this paper, we present Ghost, a uniform, light-weight and stratified general purpose proxy model and its Smalltalk implementation. Ghost supports proxies for classes or methods. When a proxy takes the place of a class it intercepts both, messages received by the class and lookup of methods for messages received by instances. Similarly, if a proxy takes the place of a method, then the method execution is intercepted too.

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Cited By

Polito GDucasse SFabresse LLaval JEtien A(2017)First-Class Undefined Classes for PharoProceedings of the 12th edition of the International Workshop on Smalltalk Technologies10.1145/3139903.3139914(1-8)Online publication date: 4-Sep-2017
https://dl.acm.org/doi/10.1145/3139903.3139914
Teruel CWernli EDucasse SNierstrasz O(2015)Propagation of Behavioral Variations with Delegation ProxiesTransactions on Aspect-Oriented Software Development XII10.1007/978-3-662-46734-3_2(63-95)Online publication date: 20-Mar-2015
https://doi.org/10.1007/978-3-662-46734-3_2
Wernli ENierstrasz OTeruel CDucasse SPeternier ABinder WErnst EHirschfeld R(2014)Delegation proxiesProceedings of the 13th international conference on Modularity10.1145/2577080.2577081(1-12)Online publication date: 22-Apr-2014
https://dl.acm.org/doi/10.1145/2577080.2577081

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Published In

cover image ACM Conferences

IWST '11: Proceedings of the International Workshop on Smalltalk Technologies

August 2011

112 pages

ISBN:9781450310505

DOI:10.1145/2166929

Co-chair:
Loic Lagadec
CNRS
,
Program Chair:
Alain Plantec
CNRS

Copyright © 2011 ACM.

Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Publication History

Published: 23 August 2011

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IWST '11: International Workshop on Smalltalk Technologies

August 23, 2011

Edinburgh, United Kingdom

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Cited By

Polito GDucasse SFabresse LLaval JEtien A(2017)First-Class Undefined Classes for PharoProceedings of the 12th edition of the International Workshop on Smalltalk Technologies10.1145/3139903.3139914(1-8)Online publication date: 4-Sep-2017
https://dl.acm.org/doi/10.1145/3139903.3139914
Teruel CWernli EDucasse SNierstrasz O(2015)Propagation of Behavioral Variations with Delegation ProxiesTransactions on Aspect-Oriented Software Development XII10.1007/978-3-662-46734-3_2(63-95)Online publication date: 20-Mar-2015
https://doi.org/10.1007/978-3-662-46734-3_2
Wernli ENierstrasz OTeruel CDucasse SPeternier ABinder WErnst EHirschfeld R(2014)Delegation proxiesProceedings of the 13th international conference on Modularity10.1145/2577080.2577081(1-12)Online publication date: 22-Apr-2014
https://dl.acm.org/doi/10.1145/2577080.2577081

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