source: DCWoRMS/trunk/src/example/localplugin/FCFSClusterLocalPlugin.java @ 497

package example.localplugin;

import gridsim.dcworms.DCWormsTags;

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

import schedframe.events.scheduling.SchedulingEvent;
import schedframe.resources.ResourceStatus;
import schedframe.resources.StandardResourceType;
import schedframe.resources.computing.ComputingNode;
import schedframe.resources.computing.ComputingResource;
import schedframe.resources.computing.Processor;
import schedframe.resources.units.Memory;
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;
import schedframe.scheduling.tasks.WorkloadUnit;

public class FCFSClusterLocalPlugin extends BaseLocalSchedulingPlugin {

        public SchedulingPlanInterface<?> schedule(SchedulingEvent event, TaskQueueList queues, JobRegistry jobRegistry,
                        ResourceManager resManager, ModuleList modules) {

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

                        for (int i = 0; i < q.size(); i++) {
                                WorkloadUnit job = q.get(i);
                                TaskInterface<?> task = (TaskInterface<?>) job;
                                // if status of the tasks in READY
                                if (task.getStatus() == DCWormsTags.READY) {
                                        
                                        /****************3 ways to schedule task****************/
                                        
                                        /****************1. Choosing particular resources to perform execution****************/
                                        Map<ResourceUnitName, ResourceUnit> choosenResources = chooseResourcesForExecution(resourceManager, task);
                                        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 Map<ResourceUnitName, ResourceUnit> chooseResourcesForExecution(
                        ClusterResourceManager resourceManager, TaskInterface<?> task) {

                Map<ResourceUnitName, ResourceUnit> map = new HashMap<ResourceUnitName, ResourceUnit>();
                List<ComputingNode> nodes = resourceManager.getComputingNodes();
                for (ComputingNode node : nodes) {
                        int cpuRequest;
                        try {
                                cpuRequest = Double.valueOf(task.getCpuCntRequest()).intValue();
                        } catch (NoSuchFieldException e) {
                                cpuRequest = 1;
                        }

                        if (cpuRequest != 0) {

                                List<Processor> processors = node.getProcessors();
                                if (processors.size() < cpuRequest) {
                                        continue;
                                }

                                List<ComputingResource> 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) {
                                        continue;
                                }

                                ProcessingElements result = new ProcessingElements(processors.get(0).getParent().getName());
                                result.addAll(choosenResources);
                                map.put(StandardResourceUnitName.PE, result);
                                
                                int memoryRequest;
                                try {
                                        memoryRequest = Double.valueOf(task.getMemoryRequest()).intValue();
                                } catch (NoSuchFieldException e) {
                                        memoryRequest = 0;
                                }
                                if (memoryRequest != 0) {

                                        Memory memory = null;
                                        try{
                                                if (node.getFreeMemory() >= memoryRequest) {            
                                                        memory = new Memory(node.getMemory(), memoryRequest, memoryRequest);
                                                }               
                                        } catch(NoSuchFieldException e){
                                                continue;
                                        }
                                        if(memory == null)
                                                continue;
                                        else {
                                                map.put(StandardResourceUnitName.MEMORY, memory);
                                                return map;
                                        }
                                } else return map;
                        }
                }
        
                return null;
        }

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

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

}