source: xssim/branches/tpiontek/src/example/localplugin/FCFSRandomClusterLocalPlugin.java @ 252

package example.localplugin;

import gridsim.Gridlet;

import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import java.util.Random;

import schedframe.scheduling.TaskInterface;
import schedframe.scheduling.events.SchedulingEvent;
import schedframe.scheduling.plugin.grid.ModuleList;
import test.rewolucja.GSSIMJobInterface;
import test.rewolucja.energy.profile.PStateType;
import test.rewolucja.resources.manager.implementation.ClusterResourceManager;
import test.rewolucja.resources.manager.interfaces.ResourceManagerInterface;
import test.rewolucja.resources.physical.implementation.ComputingNode;
import test.rewolucja.resources.physical.implementation.Processor;
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 FCFSRandomClusterLocalPlugin extends BaseLocalPlugin {

        private Random rand;
        private boolean init = true;
        
        public FCFSRandomClusterLocalPlugin() {
                rand = new Random(5);
        }

        public SchedulingPlanInterfaceNew schedule(SchedulingEvent event, QueueList queues, JobRegistryInterface jobRegistry,
                         ResourceManagerInterface resManager, ModuleList modules) {
                
                ClusterResourceManager resourceManager = (ClusterResourceManager) resManager;
                
                if( init)
                {
                        List<Processor> cpus = resourceManager.getProcessors();
                        
                        for( Processor cpu : cpus)
                                cpu.getPowerInterface().setPState( PStateType.P0);
                        
                        init = false;
                }
                

                
                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:
                        // 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) {
                                        String nodeName = chooseRandomProvider(resourceManager, task);
                                        if (nodeName != null) {
                                                addToSchedulingPlan(plan, task, nodeName);
                                        }
                                }
                        }
                        break;
                }
                return plan;
        }

        private List<ComputingNode> findSuitableNodes(int cpuRequest, List<ComputingNode> nodes){
                List<ComputingNode> avNodes = new ArrayList<ComputingNode>();
                for(ComputingNode node: nodes){
                        if(node.getFreeProcessorsNumber() >= cpuRequest){
                                avNodes.add(node);
                        }
                }
                return avNodes;
        }
        
        private String chooseRandomProvider(ClusterResourceManager resourceManager, TaskInterface<?> task) {
                
                int cpuRequest;
                try {
                        cpuRequest = Double.valueOf(task.getCpuCntRequest()).intValue();
                } catch (NoSuchFieldException e) {
                        cpuRequest = 1;
                }
                
                List<ComputingNode> nodes = resourceManager.getComputingNodes();
                
                nodes = findSuitableNodes(cpuRequest, nodes);
                
                if( nodes.size() > 0)
                {       
                        int nodeIdx = rand.nextInt(nodes.size());
                        return nodes.get(nodeIdx).getName();
                }
                else
                        return null;
        }
        
        public String getName() {
                return getClass().getName();
        }

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

}