PTOLEMY II - CiteSeerX

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Introduction and their presence in subclasses and instances will be implied by their presence in the class definition. The InstantiableNamedObj subclass of NamedObj is the base class for objects that can serve as class definitions, subclass definitions, or instances of classes. Currently, only Entity and its subclasses can play the role of a class or instance. The Executable interface, explained in the actors chapter of volume 2, defines objects that can be executed. The Actor interface extends this with capability for transporting data through ports. AtomicActor and CompositeActor are concrete classes that implement this interface. The Executable and «Interface» Changeable Attribute «Interface» Executable «Interface» Actor 0..n Manager «Interface» Debuggable 0..1 IntantiableNamedObj Entity ComponentEntity CompositeEntity AtomicActor 0..1 «Interface» DebugListener NamedObj 0..1 container 0..n container 0..n 0..1 0..n {consistency} 1 CompositeActor Director FIGURE 1.16. Some of the key classes in Ptolemy II. These are defined in the kernel, kernel.util, and actor packages. They define the Ptolemy II abstract syntax and abstract semantics. 0..1 «Interface» Derivable «Interface» Instantiable 0..n «Interface» Nameable Workspace 30 Ptolemy II Port container 1 0..n 1 0..1 link 0..n 0..n ComponentPort 0..n Relation ComponentRelation
Introduction Actor interfaces are key to the Ptolemy II abstract semantics. An executable Ptolemy II model consists of a top-level CompositeActor with an instance of Director and an instance of Manager associated with it. The manager provides overall control of the execution (starting, stopping, pausing). The director implements a semantics of a model of computation to govern the execution of actors contained by the CompositeActor. Director is the base class for directors that implement models of computation. Each such director is associated with a domain. As explained above, we have defined in Ptolemy II directors that implement continuous-time modeling (ODE solvers), process networks, synchronous dataflow, discreteevent modeling, and communicating sequential processes. 1.5.3 Domains The domains in Ptolemy II are subpackages of the ptolemy.domains package. The more mature and frequently used domains are shown in figure 1.17. The experimental domains and less commonly used domains are not shown, but the examples in figure 1.17 are illustrative of their structure. These packages generally contain a kernel subpackage, which defines classes that extend those in the actor or kernel packages of Ptolemy II. The lib subpackage, when it exists, includes domain-specific actors. 1.5.4 Library Packages Most domains extend classes in the actor package to give a specific semantic interpretation to an interconnection of actors. It is possible, and strongly encouraged, to define actors in such a way that they can operate in multiple domains. Such actors are said to be domain polymorphic [74]. Actors that are domain polymorphic are organized in the packages shown in figure 1.18. These packages are briefly described below: actor.corba This package includes actors and infrastructure for distributed models that use CORBA. actor.lib This package is the main library of polymorphic actors. actor.lib.comm This is a library of actors for modeling communications systems. actor.lib.conversions This package provides domain polymorphic actors that convert data between different types. actor.lib.gui This package is a library of polymorphic actors with user interface components, such as plotters. actor.lib.hoc This package is a library of higher-order components, which are components that construct portions of a model. actor.lib.image This package is a library of image processing actors that does not depend on JAI or JMF. actor.lib.io This package provides file I/O. actor.lib.io.comm This package provides an actor that communicate via the serial ports. This actor works only under Windows. Heterogeneous Concurrent Modeling and Design 31
Page 1 and 2: PTOLEMY II HETEROGENEOUS CONCURRENT
Page 3 and 4: VOLUME 1 INTRODUCTION TO PTOLEMY II
Page 5 and 6: Volume 1 Contents Introduction to P
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Page 9 and 10: 7. MoML 191 7.1. Introduction 191 7
Page 11 and 12: 1 Introduction Author: Edward A. Le
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Page 15 and 16: Introduction A major emphasis in Pt
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Page 55 and 56: 2 Using Vergil Authors: Edward A. L
Page 57 and 58: Using Vergil 2.2.2 Executing a Pre-
Page 59 and 60: Using Vergil The Lorenz attractor m
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Using Vergil AddSubtract actor, and
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Using Vergil If you look inside the
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Using Vergil If you look inside the
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Using Vergil transition (or right c
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Using Vergil Once you have created
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Using Vergil The grid is turned off
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Authors: Edward A. Lee Xiaojun Liu
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Expressions classes to create a gen
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Expressions The % operation is a mo
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Expressions attribute, which includ
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Expressions 3.3.5 State Machines Ex
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Expressions whose value is an array
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Expressions from it. For instance,
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Expressions defined. For example, >
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Expressions length is given by the
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Expressions Thus, for example, you
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Expressions number. With one additi
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Expressions value. For example, fix
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Expressions In the example in figur
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Expressions A.2 Basic Mathematical
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Expressions A.3 Matrix, Array, and
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Expressions A.5 Signal Processing F
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Expressions TABLE 8: Functions perf
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4 Actor Libraries Authors: Elaine C
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Actor Libraries properly in the CT
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Actor Libraries ing that multiple c
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Actor Libraries TypedAtomicActor «
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Actor Libraries SequenceScope (exte
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Actor Libraries UnsignedByteArrayTo
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Actor Libraries MobileFunction (ext
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Actor Libraries LogicFunction (exte
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Actor Libraries Sleep (extends Tran
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Actor Libraries VariableFIR (extend
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Actor Libraries Integrator: Integra
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Actor Libraries Figure 4.4 shows th
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5 Designing Actors Authors: Christo
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Designing Actors /** Javadoc commen
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Designing Actors although with most
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Designing Actors import ptolemy.act
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Designing Actors makes such actors
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Designing Actors same parameter val
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Designing Actors morphic actor comp
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Designing Actors To get data polymo
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Designing Actors public class Seque
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Designing Actors be used in domains
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Designing Actors alComm actor. Beca
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Designing Actors attribute has valu
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Designing Actors import ptolemy.act
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6 Coding Style Authors: Christopher
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Coding Style /* One line descriptio
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Coding Style Copyright (c) 2004 The
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Coding Style @version $Id: NamedObj
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Coding Style } We use instead the i
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Coding Style * @exception MyExcepti
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Coding Style + "it does not impleme
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Authors: Edward A. Lee Steve Neuend
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MoML cutes it forever, until you hi
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MoML A second difference between ou
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MoML
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MoML 7.3.3 Names and Classes Most M
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MoML Here, the element named
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MoML implement. 7.3.7 Doc Element S
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MoML It is also sometimes necess
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MoML then there will be a link t
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MoML found. For example, if the cla
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MoML it cannot collide with the nam
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MoML The rendering of the icon is d
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MoML 7.4.5 Deleting Entities, Relat
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MoML This unlinks a port from the s
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MoML model. The EntityLibrary class
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MoML Suppose that using incremental
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MoML Generate a sine wave.
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MoML
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MoML Number of iterations in
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MoML -P- The f
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MoML -P- The phase,
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8 Custom Applets Authors: Edward A.
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Custom Applets html code, see the J
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Custom Applets public class Tutoria
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Custom Applets then the result of
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Custom Applets 8.3.5 Using Model Pa
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Custom Applets ptolemy/domains/doma
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References [1] G. Agha, Actors: A M
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[33] S. A. Edwards, “The Specific
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[67] E. Kohler, The Click Modular R
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[95] J. Liu, X. Liu, T. J. Koo, B.
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[132]W. R. Sutherland, "The on-Line
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Glossary abstract syntax ..........
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Ptolemy II ........................
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Index Symbols - in UML 41 # in UML
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coin flips 142 Color class 173 colo
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entity in XML 198 EntityLibrary cla
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Director class 159 inverse FFT 124
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CompositeEntity class 206 nextPower
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safety 34 SampleDelay actor 78, 138
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type constraint 155 type constraint
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