source: branches/3.3-HiveMigration/sources/HeuristicLab.Hive/HeuristicLab.Hive.Server.LINQDataAccess/3.3/JobDao.cs @ 4333

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using HeuristicLab.Hive.Contracts.BusinessObjects;
using System.Data.Linq;
using HeuristicLab.Hive.Server.DataAccess;
using System.IO;
using System.Data.SqlClient;

namespace HeuristicLab.Hive.Server.LINQDataAccess {
  public class JobDao : BaseDao<JobDto, Job>, IJobDao {

    #region IGenericDao<JobDto,Job> Members

    public JobDto FindById(Guid id) {
      return (from job in Context.Jobs
              where job.JobId.Equals(id)
              select EntityToDto(job, null)).SingleOrDefault();
    }

    public IEnumerable<JobDto> FindAll() {
      return (from job in Context.Jobs
              select EntityToDto(job, null)).ToList();
    }

    public IEnumerable<JobDto> FindWithLimitations(JobState jobState, int offset, int count) {
      IQueryable<JobDto> query = null;
      if (jobState == JobState.Finished) {
        query = from job in Context.Jobs
                where job.JobState == Enum.GetName(typeof(JobState), jobState)
                orderby job.DateFinished
                select EntityToDto(job, null);
      } else if (jobState == JobState.Calculating || jobState == JobState.SnapshotRequested || jobState == JobState.SnapshotSent) {
        query = from job in Context.Jobs
                where job.JobState == Enum.GetName(typeof(JobState), jobState)
                orderby job.DateCalculated
                select EntityToDto(job, null);
      } else {
        query = from job in Context.Jobs
                where job.JobState == Enum.GetName(typeof(JobState), jobState)
                orderby job.DateCreated
                select EntityToDto(job, null);
      }

      return query.Skip(offset).Take(count).ToList();
    }


    public byte[] GetBinaryJobFile(Guid jobId) {
      return (from job in Context.Jobs
              where job.JobId.Equals(jobId)
              select job.SerializedJob).SingleOrDefault().ToArray();
    }

    public JobDto Insert(JobDto bObj) {
      Job j = DtoToEntity(bObj, null);
      Context.Jobs.InsertOnSubmit(j);
      CommitChanges();
      bObj.Id = j.JobId;
      return bObj;
    }

    public void SetBinaryJobFile(Guid jobId, byte[] data) {
      Job j = (from job in Context.Jobs
               where job.JobId.Equals(jobId)
               select job).SingleOrDefault();
      j.SerializedJob = data;
      CommitChanges();
    }

    public SerializedJob InsertWithAttachedJob(SerializedJob job) {
      Job j = DtoToEntity(job.JobInfo, null);
      j.SerializedJob = job.SerializedJobData;
      foreach (Guid assignRessourceId in job.JobInfo.AssignedResourceIds)
        j.AssignedResources.Add(new AssignedResource { ResourceId = assignRessourceId });
      Context.Jobs.InsertOnSubmit(j);
      CommitChanges();
      job.JobInfo.Id = j.JobId;
      return job;
    }

    public void Delete(JobDto bObj) {
      Job job = Context.Jobs.SingleOrDefault(j => j.JobId.Equals(bObj.Id));
      Context.Jobs.DeleteOnSubmit(job);
      CommitChanges();
    }

    public void Update(JobDto bObj) {
      Job job = Context.Jobs.SingleOrDefault(j => j.JobId.Equals(bObj.Id));
      DtoToEntity(bObj, job);
      CommitChanges();
    }

    public IEnumerable<JobDto> FindActiveJobsOfSlave(SlaveDto slave) {
      return (from j in Context.Jobs
              where (j.JobState == Enum.GetName(typeof(JobState), JobState.Calculating) ||
                     j.JobState == Enum.GetName(typeof(JobState), JobState.Aborted) ||
                     j.JobState == Enum.GetName(typeof(JobState), JobState.SnapshotRequested) ||
                     j.JobState == Enum.GetName(typeof(JobState), JobState.SnapshotSent)) &&
                    (j.ResourceId.Equals(slave.Id))
              select EntityToDto(j, null)).ToList();
    }

    public IEnumerable<JobDto> FindFittingJobsForSlave(JobState state, int freeCores, int freeMemory, Guid slaveId) {
      SlaveGroupDao cgd = new SlaveGroupDao();

      List<Guid> idList = new List<Guid>(cgd.FindAllGroupAndParentGroupIdsForSlave(slaveId));
      //Add myself too - enables jobs for one specific host!
      idList.Add(slaveId);

      var q = (from ar in Context.AssignedResources
               where ar.Job.JobState == Enum.GetName(typeof(JobState), JobState.Offline) &&
                     ar.Job.CoresNeeded <= freeCores &&
                     ar.Job.MemoryNeeded <= freeMemory &&
                     idList.Contains(ar.ResourceId)
               orderby ar.Job.Priority descending
               select EntityToDto(ar.Job, null));
      return q.ToList();
    }

    public IEnumerable<JobDto> GetJobsByState(JobState state) {
      return (from j in Context.Jobs
              where (j.JobState == Enum.GetName(typeof(JobState), state))
              select EntityToDto(j, null)).ToList();
    }

    public void AssignSlaveToJob(Guid slaveId, Guid jobId) {
      Slave c = Context.Resources.OfType<Slave>().SingleOrDefault(slave => slave.ResourceId.Equals(slaveId));
      Job j = Context.Jobs.SingleOrDefault(job => job.JobId.Equals(jobId));
      c.Jobs.Add(j);
      j.Slave = c;
      CommitChanges();
    }

    public void SetJobOffline(JobDto job) {
      Job j = Context.Jobs.SingleOrDefault(jq => jq.JobId.Equals(job.Id));
      j.Slave = null;
      j.JobState = Enum.GetName(typeof(JobState), JobState.Offline);
      CommitChanges();
    }

    public Stream GetSerializedJobStream(Guid jobId) {
      VarBinarySource source = new VarBinarySource((SqlConnection)Context.Connection, null, "Job", "SerializedJob", "JobId", jobId);
      return new VarBinaryStream(source);
    }

    public IEnumerable<JobDto> FindJobsById(IEnumerable<Guid> jobIds) {
      IQueryable<JobDto> jobs = from job in Context.Jobs
                                where jobIds.Contains(job.JobId)
                                select EntityToDto(job, null);
      return jobs.ToList();
    }

    public bool IsUserAuthorizedForJobs(string userId, params Guid[] jobIds) {
      var jobs = from job in Context.Jobs
                 where jobIds.Contains(job.JobId)
                 select job;
      return jobs.All(job => job.UserId == userId);
    }
    #endregion

    public override Job DtoToEntity(JobDto source, Job target) {
      if (source == null)
        return null;
      if (target == null)
        target = new Job();

      target.CoresNeeded = source.CoresNeeded;
      target.MemoryNeeded = source.MemoryNeeded;

      target.DateCalculated = source.DateCalculated;
      target.DateCreated = source.DateCreated;
      target.DateFinished = source.DateFinished;
      target.JobId = source.Id;

      target.Percentage = source.Percentage;
      target.Exception = source.Exception;

      target.Priority = source.Priority;
      target.JobState = Enum.GetName(typeof(JobState), source.State);
      target.UserId = source.UserId;
      return target;
    }

    //Assigned ressources are not used atm!
    //Slave is not used ATM - not sure when we stopped using those...
    public override JobDto EntityToDto(Job source, JobDto target) {
      if (source == null)
        return null;
      if (target == null)
        target = new JobDto();

      target.CoresNeeded = source.CoresNeeded;
      target.MemoryNeeded = source.MemoryNeeded;

      target.DateCalculated = source.DateCalculated;
      target.DateCreated = source.DateCreated;
      target.DateFinished = source.DateFinished;
      target.Id = source.JobId;
      
      target.Exception = source.Exception;
      target.Percentage = source.Percentage;

      target.Priority = source.Priority;
      target.State = (JobState)Enum.Parse(typeof(JobState), source.JobState, true);
      target.UserId = source.UserId;
      return target;
    }
  }
}