• Description:
  Configuring applications in EdgeCloudSim involves defining the computational and communication requirements of the tasks that represent user applications in the simulation environment. This process typically includes creating an XML file that details the application's characteristics. Each application is represented with attributes such as its unique ID, task type, resource requirements, and data exchange patterns.

• Define Application Characteristics: Start by defining the characteristics of the application, such as:
• Tasks that the application performs.
• Execution times for each task
• Resource requirements (e.g., CPU, memory, bandwidth).
• Dependencies between tasks (if any).

• Create an XML Configuration File: Use an XML file to describe the application and its tasks. The XML should contain,
• Task names and identifiers.
• Execution time for each task.
• Resources needed for each task (e.g., compute power, storage).
• Task dependencies (which task needs to be completed before another one starts).
• Example of a basic XML structure:
  

• Load Configuration into EdgeCloudSim: After creating the XML file, load it into the simulation by using the SimSettings class. This class reads the configuration file and extracts the details of the application to set up the tasks and their properties.
• Example:
  SimSettings SS = SimSettings.getInstance();
  SS.initialize(configFile, edgeDevicesFile, applicationsFile);

• Instantiate Applications in Simulation: Once the application configuration is loaded, EdgeCloudSim uses the settings from the configuration file to instantiate the applications. The application is then linked to the edge devices and orchestrators.
• Example:
  Application app = new Application();
  app.setTaskList(SS.getTaskList());
  app.setResourceRequirements(SS.getResourceRequirements());

• Assign Policies and Scenarios: The application can be associated with specific orchestrator policies (such as scheduling or resource allocation policies) and simulation scenarios (such as mobility or task placement).
• Example:
  app.setOrchestratorPolicy("SomePolicy");
  app.setScenario("SomeScenario");

• Enable Dynamic Task Scheduling: With the application now configured, dynamic task scheduling can be enabled to manage when and where tasks are executed based on the resources available in the edge network.

• Start the Simulation: After the application and its components have been configured, start the simulation to observe how the application behaves within the edge network.
• Example:
  SimManager manager = new SimManager(sampleFactory, numDevices, scenario, policy);
  manager.startSimulation();