1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using System;
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23 | using System.Collections.Generic;
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24 | using System.Data.Linq;
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25 | using System.Linq;
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26 |
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27 | namespace HeuristicLab.Services.Hive.DataAccess.Daos {
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28 | public class TaskDao : GenericDao<Guid, Task> {
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29 | private Table<AssignedTaskResource> AssignedTaskResourceTable {
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30 | get { return DataContext.GetTable<AssignedTaskResource>(); }
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31 | }
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32 |
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33 | public TaskDao(DataContext dataContext) : base(dataContext) { }
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34 |
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35 | public override Task GetById(Guid id) {
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36 | return GetByIdQuery(DataContext, id);
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37 | }
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38 |
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39 | public IQueryable<Task> GetAllChildTasks() {
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40 | return Table.Where(x => !x.IsParentTask);
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41 | }
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42 |
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43 | public IQueryable<Task> GetByJobId(Guid id) {
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44 | return Table.Where(x => x.JobId == id);
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45 | }
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46 | public class TaskPriorityInfo {
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47 | public Guid JobId { get; set; }
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48 | public Guid TaskId { get; set; }
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49 | public int Priority { get; set; }
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50 | }
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51 |
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52 | public IEnumerable<TaskPriorityInfo> GetWaitingTasks(Slave slave) {
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53 | //Originally we checked here if there are parent tasks which should be calculated (with GetParentTasks(resourceIds, count, false);).
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54 | //Because there is at the moment no case where this makes sense (there don't exist parent tasks which need to be calculated),
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55 | //we skip this step because it's wasted runtime
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56 | return DataContext.ExecuteQuery<TaskPriorityInfo>(GetWaitingTasksQueryString, slave.ResourceId, Enum.GetName(typeof(TaskState), TaskState.Waiting), slave.FreeCores, slave.FreeMemory).ToList();
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57 | }
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58 |
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59 | /// <summary>
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60 | /// returns all parent tasks which are waiting for their child tasks to finish
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61 | /// </summary>
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62 | /// <param name="resourceIds">list of resourceids which for which the task should be valid</param>
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63 | /// <param name="count">maximum number of task to return</param>
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64 | /// <param name="finished">if true, all parent task which have FinishWhenChildJobsFinished=true are returned, otherwise only FinishWhenChildJobsFinished=false are returned</param>
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65 | /// <returns></returns>
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66 | public IEnumerable<Task> GetParentTasks(IEnumerable<Guid> resourceIds, int count, bool finished) {
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67 | var query = from ar in AssignedTaskResourceTable
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68 | where resourceIds.Contains(ar.ResourceId)
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69 | && ar.Task.State == TaskState.Waiting
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70 | && ar.Task.IsParentTask
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71 | && (finished ? ar.Task.FinishWhenChildJobsFinished : !ar.Task.FinishWhenChildJobsFinished)
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72 | && (from child in Table
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73 | where child.ParentTaskId == ar.Task.TaskId
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74 | select child.State == TaskState.Finished
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75 | || child.State == TaskState.Aborted
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76 | || child.State == TaskState.Failed).All(x => x)
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77 | && (from child in Table // avoid returning WaitForChildTasks task where no child-task exist (yet)
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78 | where child.ParentTaskId == ar.Task.TaskId
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79 | select child).Any()
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80 | orderby ar.Task.Priority descending
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81 | select ar.Task;
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82 | return count == 0 ? query.ToArray() : query.Take(count).ToArray();
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83 | }
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84 |
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85 | public void UpdateExecutionTime(Guid taskId, double executionTime) {
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86 | DataContext.ExecuteCommand(UpdateExecutionTimeQuery, executionTime, DateTime.Now, taskId);
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87 | }
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88 |
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89 | #region Compiled queries
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90 | private static readonly Func<DataContext, Guid, Task> GetByIdQuery =
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91 | CompiledQuery.Compile((DataContext db, Guid taskId) =>
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92 | (from task in db.GetTable<Task>()
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93 | where task.TaskId == taskId
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94 | select task).SingleOrDefault());
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95 | #endregion
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96 |
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97 | #region String queries
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98 | private const string GetWaitingTasksQueryString = @"
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99 | WITH pr AS (
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100 | SELECT ResourceId, ParentResourceId
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101 | FROM [Resource]
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102 | WHERE ResourceId = {0}
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103 | UNION ALL
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104 | SELECT r.ResourceId, r.ParentResourceId
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105 | FROM [Resource] r JOIN pr ON r.ResourceId = pr.ParentResourceId
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106 | )
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107 | SELECT DISTINCT t.TaskId, t.JobId, t.Priority
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108 | FROM pr JOIN AssignedTaskResources ar ON ar.ResourceId = pr.ResourceId
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109 | JOIN Task t ON t.TaskId = ar.TaskId
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110 | WHERE NOT (t.IsParentTask = 1 AND t.FinishWhenChildJobsFinished = 1)
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111 | AND t.TaskState = {1}
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112 | AND t.CoresNeeded <= {2}
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113 | AND t.MemoryNeeded <= {3}
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114 | ";
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115 |
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116 | private const string UpdateExecutionTimeQuery = @"
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117 | UPDATE [Task]
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118 | SET ExecutionTimeMs = {0},
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119 | LastHeartbeat = {1}
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120 | WHERE TaskId = {2}
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121 | ";
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122 | #endregion
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123 | }
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124 | } |
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