1 / 10

Aglets

Aglets. Based on Mobile Agents with Java: The Aglet API by Danny B. Lange and Mitsuru Oshima. Their Definition of Agent. A software object Mandatory properties reactive autonomous goal-driven temporally continous. Seven Good Reasons (I). Reduce network load through mobility

alec-nieves
Download Presentation

Aglets

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Aglets Based on Mobile Agents with Java: The Aglet API by Danny B. Lange and Mitsuru Oshima

  2. Their Definition of Agent • A software object • Mandatory properties • reactive • autonomous • goal-driven • temporally continous

  3. Seven Good Reasons (I) • Reduce network load through mobility • Overcome network latency • Encapsulate protocols -- dealing with legacy systems • Execute asynchronously and autonomously

  4. Seven Good Reasons (II) • Adapt dynamically • Naturally heterogeneous • Robust and fault-tolerant • can find better hosts • can distribute tasks • work redundantly

  5. Pos. Agent Chars. of Java (I) • Platform independent • Secure execution • no illegal type casting • no pointer arithmetic • byte code is checked before execution • Dynamic class loading • Multithread programming • synchronization primitives

  6. Pos. Agent Chars. of Java (II) • Object serialization • Reflection

  7. Neg. Agent Chars. of Java (I) • No resource control • CPU cycles • memory • GUI handles • No protection of references • access to public methods • proxy

  8. Neg. Agent Chars. of Java (II) • No object ownership of references • garbage collection • memory, GUIs not released • agent kept alive against its will (with reference to agent) • No support for preservation and resumption of execution state • no access to virtual machine, program counter, etc.

  9. Basic Concepts of Aglets • Aglet • Proxy • Context • Message • synchronous and asynchronous • Future reply • Identifier

  10. Basic Operation on Aglets • Create • Clone • Dispatch • Retract • Activate and deactivate • Dispose • Send and receive messages

More Related