source: xssim/trunk/src/example/localplugin/FCFSClusterLocalPlugin.java @ 204

package example.localplugin;

import gridsim.Gridlet;
import gridsim.gssim.SubmittedTask;
import gssim.schedframe.scheduling.ExecTaskInterface;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;

import schedframe.resources.units.Memory;
import schedframe.resources.units.ResourceUnit;
import schedframe.scheduling.TaskInterface;
import schedframe.scheduling.events.SchedulingEvent;
import schedframe.scheduling.plugin.grid.ModuleList;
import schedframe.scheduling.utils.ResourceParameterName;
import test.rewolucja.GSSIMJobInterface;
import test.rewolucja.resources.ProcessingElements;
import test.rewolucja.resources.ResourceStatus;
import test.rewolucja.resources.ResourceType;
import test.rewolucja.resources.manager.implementation.ClusterResourceManager;
import test.rewolucja.resources.manager.interfaces.ResourceManagerInterface;
import test.rewolucja.resources.physical.base.ComputingResource;
import test.rewolucja.resources.physical.implementation.Processor;
import test.rewolucja.resources.physical.implementation.ComputingNode;
import test.rewolucja.scheduling.JobRegistryInterface;
import test.rewolucja.scheduling.plan.SchedulingPlanInterfaceNew;
import test.rewolucja.scheduling.plan.SchedulingPlanNew;
import test.rewolucja.scheduling.queue.Queue;
import test.rewolucja.scheduling.queue.QueueList;

public class FCFSClusterLocalPlugin extends BaseLocalPlugin {

        public FCFSClusterLocalPlugin() {
        }

        public SchedulingPlanInterfaceNew schedule(SchedulingEvent event, QueueList queues, JobRegistryInterface jobRegistry,
                        ResourceManagerInterface resManager, ModuleList modules) {

                ClusterResourceManager resourceManager = (ClusterResourceManager) resManager;
                SchedulingPlanNew plan = new SchedulingPlanNew();
                // chose the events types to serve.
                // Different actions for different events are possible.
                switch (event.getType()) {
                case START_TASK_EXECUTION:
                case TASK_FINISHED:
                case TIMER:
                        // our tasks are placed only in first queue (see
                        // BaseLocalPlugin.placeJobsInQueues() method)
                        Queue q = queues.get(0);
                        // check all tasks in queue

                        for (int i = 0; i < q.size(); i++) {
                                GSSIMJobInterface<?> job = q.get(i);
                                TaskInterface<?> task = (TaskInterface<?>) job;
                                // if status of the tasks in READY
                                if (task.getStatus() == Gridlet.READY) {

                                        SubmittedTask subTask = (SubmittedTask) task;
                                        
                                        /****************3 ways to schedule task****************/
                                        
                                        /****************1. Choosing particular resources to perform execution****************/
                                        Map<ResourceParameterName, ResourceUnit> choosenResources = chooseResourcesForExecution(resourceManager, subTask);
                                        if (choosenResources != null) {
                                                addToSchedulingPlan(plan, task, choosenResources);
                                        }
                                        
                                        /****************2. Choosing resource scheduler/provider to submit task.  If the given resource doesn't contains/isn't 
                                        a scheduler, random resources from the given resource will be chosen in order to perform execution****************/
                                        /*String provName = chooseProviderForExecution(resourceManager);
                                        if (provName != null) {
                                                addToSchedulingPlan(plan, task, provName);
                                        }*/

                                        /****************3. Scheduler will choose random resources to perform execution****************/
                                        //addToSchedulingPlan(plan, task);
                                }
                        }

                        break;
                }
                return plan;
        }

        private HashMap<ResourceParameterName, ResourceUnit> chooseResourcesForExecution(
                        ClusterResourceManager resourceManager, ExecTaskInterface task) {

                HashMap<ResourceParameterName, ResourceUnit> map = new HashMap<ResourceParameterName, ResourceUnit>();

                int cpuRequest;
                try {
                        cpuRequest = Double.valueOf(task.getCpuCntRequest()).intValue();
                } catch (NoSuchFieldException e) {
                        cpuRequest = 1;
                }

                if (cpuRequest != 0) {
                        List<ComputingResource> choosenResources = null;
                        List<Processor> processors = null;
                        processors = resourceManager.getProcessors();
                        if (processors.size() < cpuRequest) {
                                // log.warn("Task requires more cpus than is availiable in this resource.");
                                return null;
                        }

                        choosenResources = new ArrayList<ComputingResource>();

                        for (int i = 0; i < processors.size() && cpuRequest > 0; i++) {
                                if (processors.get(i).getStatus() == ResourceStatus.FREE) {
                                        choosenResources.add(processors.get(i));
                                        cpuRequest--;
                                }
                        }
                        if (cpuRequest > 0) {
                                // log.info("Task " + task.getJobId() + "_" + task.getId() +
                                // " requires more cpus than is availiable in this moment.");
                                return null;
                        }

                        ProcessingElements result = new ProcessingElements(processors.get(0).getParent().getName());
                        result.addAll(choosenResources);
                        map.put(ResourceParameterName.PROCESSINGELEMENTS, result);

                }
                int memoryRequest;
                try {
                        memoryRequest = Double.valueOf(task.getMemoryRequest()).intValue();
                } catch (NoSuchFieldException e) {
                        memoryRequest = 0;
                }
                if (memoryRequest != 0) {
                        List<ComputingNode> nodes = resourceManager.getComputingNodes();

                        Memory memory = null;
                        for (ComputingNode node : nodes) {

                                if (node.getFreeMemory() >= memoryRequest) {
                                        memory = new Memory(node.getMemoryUnit(), memoryRequest, memoryRequest);
                                } else
                                        return null;
                        }
                        map.put(ResourceParameterName.MEMORY, memory);
                }

                return map;
        }

        @SuppressWarnings("unchecked")
        private String chooseProviderForExecution(ResourceManagerInterface unitsManager) {
                List<ComputingResource> processingElements;
                Properties properties = new Properties();
                properties.setProperty("type", ResourceType.COMPUTING_NODE.toString());
                // properties.setProperty("status", ResourceStatus.FREE.toString());
                processingElements = (List<ComputingResource>) unitsManager.filterResources(properties);
                return processingElements.get(0).getName();
        }

        public String getName() {
                return getClass().getName();
        }

        public void init(Properties properties) {
                // no extra initialization is expected.
        }

}