source: DCWoRMS/trunk/src/test/article/recs/plugins/scheduling/RecsExclusivenessRandomSP.java @ 679

package test.article.recs.plugins.scheduling;

import gridsim.dcworms.DCWormsTags;

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

import schedframe.events.scheduling.SchedulingEvent;
import schedframe.resources.ResourceStatus;
import schedframe.resources.computing.ComputingNode;
import schedframe.resources.computing.ComputingResource;
import schedframe.resources.computing.Core;
import schedframe.resources.units.ProcessingElements;
import schedframe.resources.units.ResourceUnit;
import schedframe.resources.units.ResourceUnitName;
import schedframe.resources.units.StandardResourceUnitName;
import schedframe.scheduling.manager.resources.ClusterResourceManager;
import schedframe.scheduling.manager.resources.ResourceManager;
import schedframe.scheduling.manager.tasks.JobRegistry;
import schedframe.scheduling.plan.SchedulingPlanInterface;
import schedframe.scheduling.plan.impl.SchedulingPlan;
import schedframe.scheduling.plugin.grid.ModuleList;
import schedframe.scheduling.queue.TaskQueue;
import schedframe.scheduling.queue.TaskQueueList;
import schedframe.scheduling.tasks.TaskInterface;

public class RecsExclusivenessRandomSP extends RecsSP {

        private Random rand = new Random(5);
        
        public SchedulingPlanInterface<?> schedule(SchedulingEvent event, TaskQueueList queues, JobRegistry jobRegistry,
                        ResourceManager resManager, ModuleList modules) {

                ClusterResourceManager resourceManager = (ClusterResourceManager) resManager;
                SchedulingPlan plan = new SchedulingPlan();
                // choose 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 BaseLocalSchedulingPlugin.placeJobsInQueues() method)
                        TaskQueue q = queues.get(0);
                        // check all tasks in queue

                        for (int i = 0; i < q.size(); i++) {
                                TaskInterface<?> task = q.get(i);
                                initApplicationType(task);
                                
                                // if status of the tasks in READY
                                if (task.getStatus() == DCWormsTags.READY) {
                                        Map<ResourceUnitName, ResourceUnit> choosenResources = chooseResourcesForExecution(resourceManager, task);
                                        if (choosenResources != null) {
                                                addToSchedulingPlan(plan, task, choosenResources);
                                        }
                                }
                        }

                        break;
                }
                return plan;
        }

        private Map<ResourceUnitName, ResourceUnit> chooseResourcesForExecution(
                        ClusterResourceManager resourceManager, TaskInterface<?> task) {

                Map<ResourceUnitName, ResourceUnit> map = new HashMap<ResourceUnitName, ResourceUnit>();
                
                List<ComputingNode> nodes = resourceManager.getComputingNodes();
                List<ComputingNode> avNodes = filterNodes(nodes, task);
                if(avNodes.size() == 0)
                        return null;
                ComputingNode node = randomNode(avNodes);

                int cpuRequest;
                try {
                        cpuRequest = Double.valueOf(task.getCpuCntRequest()).intValue();
                } catch (NoSuchFieldException e) {
                        cpuRequest = 0;
                }

                if (cpuRequest != 0) {

                        List<Core> cores = node.getProcessors().get(0).getCores();

                        List<ComputingResource> choosenResources = new ArrayList<ComputingResource>();                          
                        for (int i = 0; i < cores.size() && cpuRequest > 0; i++) {
                                if (cores.get(i).getStatus() == ResourceStatus.FREE) {
                                        choosenResources.add(cores.get(i));
                                        cpuRequest--;
                                }
                        }
                        if (cpuRequest > 0) {
                                return null;
                        }
                        ProcessingElements pe = new ProcessingElements();
                        pe.addAll(choosenResources);
                        map.put(StandardResourceUnitName.PE, pe);
                        return map;
                }
                return null;
        }
        
        private List<ComputingNode> filterNodes(List<ComputingNode> nodes, TaskInterface<?> task){
                List<ComputingNode> filteredNodes = new ArrayList<ComputingNode>();
                for (ComputingNode node : nodes) {
                        int cpuRequest;
                        try {
                                cpuRequest = Double.valueOf(task.getCpuCntRequest()).intValue();
                        } catch (NoSuchFieldException e) {
                                cpuRequest = 0;
                        }

                        if (cpuRequest != 0) {

                                List<Core> cores = node.getProcessors().get(0).getCores();
                                if (cores.size() < cpuRequest) {
                                        continue;
                                }

                                int freeCores = 0;
                                for(Core core: cores){
                                        if(core.getStatus() == ResourceStatus.FREE)
                                                freeCores++;
                                }
                                
                                if(freeCores != cores.size())
                                        continue;
                                
                                filteredNodes.add(node);
                        }
                }
                
                return filteredNodes;
        }
        
        private ComputingNode randomNode(List<ComputingNode> nodes){
                return nodes.get(rand.nextInt(nodes.size()));
        }
}