AgE 2.4 : Sample applications

Created by Unknown User (kpietak@agh.edu.pl), last modified by Unknown User (agedeveloper) on Oct 19, 2011

General notes

Instructions of how to run all sample applications can be found on the page Running sample applications.

Hello World example

This example presents two agents that take turns in writing a "Hello world" message to the log.

The used code is located in package: org.jage.examples.helloworld.

The configuration file is located in: examples/helloworld/age.xml. (You can see a description of it on the page Sample XML configuration.)

The Eclipse launch file is located in: config/helloworld.launch.

On this page:

Strategy usage

This example shows how to use strategies, as described on the WzorzecProjektowyStrategia page.

The used code is located in package: org.jage.examples.strategy.

The configuration file is located in: examples/strategy/age.xml.

The Eclipse launch file is located in: config/strategy.launch.

Behavior

The example defines three agents of the same class. Each of them uses a completely different implementation of the echo strategy to perform its task. Three different strategies are actively used:

  1. The simple counting strategy, that keeps a count of all calls.
  2. The counting strategy that increases a counter by a specified value.
  3. The strategy that simply writes "ABC" to the output.

Simple strategy delegation

This example shows how an agent can obtain a strategy dynamically during runtime assuming it is visible in terms described in the page HierarchiaKontenerow. This pattern can be used as simple way to reconfigure agent behavior in the execution time.

The used code is located in package: org.jage.examples.delegation.

The configuration file is located in: examples/delegation/age.xml.

The Eclipse launch file is located in: config/delegation.launch.

Behavior

During initialization a simple agent (class DelegationSimpleLeaf) located in a leaf of the agent hierarchy obtains a name (as a string) of a strategy IEchoStrategy from its parent (class DelegationSimpleAggregate). After that it requests an implementation with this name from the instance provider. The strategy is located directly in the parent container. Then, when performing its actions, it executes this concrete implementation of the strategy.

Strategy delegation with external strategy provider

This example is an extended version of Strategy delegation example. It shows how an agent can obtain a strategy dynamically during runtime from an external strategy provider. This pattern can be used e.g. as simple way to reconfigure agent behavior in the execution time or for providing a bundle of strategies managed by a single service locator.

The used code is located in package: org.jage.examples.delegation.

The configuration file is located in: examples/delegation/age-external.xml.

The Eclipse launch file is located in: config/delegation-external.launch.

Behavior

During initialization a simple agent (class DelegationSimpleLeaf) located in a leaf of the agent hierarchy obtains a name (as a string) of a strategy IEchoStrategy from its parent. After that it requests an implementation with this name from the instance provider. The strategy does not exist directly in any container. Instead, a task for providing an instance is delegated to a strategy provider (class StrategyProvider). Then, agent, when performing its actions, executes this concrete implementation of the strategy.

An actual implementation of a strategy provider is fully dependent on a user. The only requirement is to implement the IComponentInstanceProvider interface.

Configuration examples

Configuration examples shows how to use some of mechanisms provided by jAgE for configuring the system.

Currently available examples:

  • Usage of array
  • Usage of collections

The used code is located in the package: org.jage.examples.configuration.

Configuration files are located in examples/configuration/ directory.

Eclipse launch files are located in config/ directory and starts with configuration- prefix.

Usage of array

The configuration file name: age-array.xml.

The Eclipse launch file name: configuration-array.launch.

Behavior

There is one agent configured with two sample arrays: object-array and long-array that contain respectively: three instances of ExampleClass and three instances of longs. The agent obtains both of them during initialization and prints their content to the log.

Usage of collections

The configuration file name: age-collections.xml.

The Eclipse launch file name: configuration-collections.launch.

Behavior

There are two agents:

  • ListAgent is configured with two sample lists: object-list and long-list. They contain respectively: three instances of ExampleClass and three instances of longs.
  • MapAgent uses two maps: object-map and long-map. Both of maps map strings to instances of ExampleClass or instances of longs.

Agents receive both of them by auto-wiring and again obtains them during initialization. Then they print their content to the log.

Multiworkplace

It consists of two examples: isolated and non-isolated. The former shows the behavior of agents in the isolated workplace (IsolatedSimpleWorkplace class) and the latter - their behavior during identical actions in a connected (aware of the existence of other workplaces) workplace.

The used code is located in the package: org.jage.examples.multiworkplace.

Configuration files are located in examples/multiworkplace/ directory.

Eclipse launch files are located in config/ directory and starts with multiworkplace- prefix.