Roles as a Coordination Construct: Introducing powerJava (bibtex)
by M. Baldoni, G. Boella, L. van der Torre
Abstract:
In this paper we apply the role metaphor to coordination. Roles are used in sociology as a way for structuring organizations and for coordinating their behavior. In our model, the distinguishing features of roles are their dependence on an institution, and the powers they assign to the players of roles. The institution represents an environment where the different components interact with each other by using the powers attributed to them by the roles they play, even when they do not know each other. The interaction between a component playing a role and the role is performed via precise interfaces stating the requirements to play a role, and which powers are attributed by roles. Roles encapsulate their players ' capabilities to interact with the institution and with the other roles, thus achieving separation of concerns between computation and coordination. The institution acts as a coordinator which manages the interactions among components by acting on the roles they play, thus achieving a form of exogenous coordination. As an example, we introduce the role construct in the Java programming language, providing a precompiler for it. In order to better explain the proposal, we show how to use the role construct as a coordination means by applying it to a dining philosophers problem extended with dynamic reconfiguration.
Reference:
Roles as a Coordination Construct: Introducing powerJava (M. Baldoni, G. Boella, L. van der Torre), In Electronic Notes in Theoretical Computer Science (ENTCS) Procs. of the First International Workshop on Methods and Tools for Coordinating Concurrent, Distributed and Mobile Systems (MTCoord 2005), volume 150, 2006.
Bibtex Entry:
@Article{Baldoni2006c,
  Title                    = {Roles as a Coordination Construct: Introducing {powerJava}},
  Author                   = {M. Baldoni and G. Boella and L. van der Torre},
  Journal                  = {Electronic Notes in Theoretical Computer Science (ENTCS) Procs. of the First International Workshop on Methods and Tools for Coordinating Concurrent, Distributed and Mobile Systems (MTCoord 2005)},
  Year                     = {2006},
  Number                   = {1},
  Pages                    = {9-29},
  Volume                   = {150},

  Abstract                 = {In this paper we apply the role metaphor to coordination. Roles are used in sociology as a way for structuring organizations and for coordinating their behavior. In our model, the distinguishing features of roles are their dependence on an institution, and the powers they assign to the players of roles. The institution represents an environment where the different components interact with each other by using the powers attributed to them by the roles they play, even when they do not know each other. The interaction between a component playing a role and the role is performed via precise interfaces stating the requirements to play a role, and which powers are attributed by roles. Roles encapsulate their players ' capabilities to interact with the institution and with the other roles, thus achieving separation of concerns between computation and coordination. The institution acts as a coordinator which manages the interactions among components by acting on the roles they play, thus achieving a form of exogenous coordination. As an example, we introduce the role construct in the Java programming language, providing a precompiler for it. In order to better explain the proposal, we show how to use the role construct as a coordination means by applying it to a dining philosophers problem extended with dynamic reconfiguration.},
  Affiliation              = {icr},
  Bdsk-url-1               = {http://www.di.unito.it/~guido/PS/entcs05b.pdf},
  Slides                   = {http://icr.uni.lu/leonvandertorre/papers/mtcoord05-pres.pdf},
  Timestamp                = {2013.07.26},
  Url                      = {http://www.di.unito.it/~guido/PS/entcs05b.pdf}
}
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