576 lines
22 KiB
Python
576 lines
22 KiB
Python
###
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#
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# This file controls the 'external' job control manager, that (periodically #
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# looks / somehow is pushed an event?) picks up new jobs, and processes them.
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#
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# It then stores the progress/status, etc. in job and joblog tables as needed
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# via wrapper functions.
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#
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# The whole pa_job_manager is multi-threaded, and uses the database tables for
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# state management and communication back to the pa web site
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#
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###
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from sqlalchemy.ext.declarative import declarative_base
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from sqlalchemy import Column, Integer, String, Sequence, Float, ForeignKey, DateTime
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from sqlalchemy.exc import SQLAlchemyError
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from sqlalchemy.orm import relationship
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from sqlalchemy import create_engine
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from sqlalchemy.orm import sessionmaker
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from shared import DB_URL, PA_JOB_MANAGER_HOST, PA_JOB_MANAGER_PORT
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from datetime import datetime, timedelta
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import pytz
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import time
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import os
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import glob
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from PIL import Image
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from pymediainfo import MediaInfo
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import hashlib
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import exifread
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import base64
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import numpy
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import cv2
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import socket
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import threading
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DEBUG=1
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# an Manager, which the Session will use for connection resources
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some_engine = create_engine(DB_URL)
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# create a configured "Session" class
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Session = sessionmaker(bind=some_engine)
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# create a Session
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session = Session()
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Base = declarative_base()
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# global for us to keep state / let front-end know our state
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pa_eng=None
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################################################################################
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# FileData class...
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################################################################################
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class FileData():
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def getExif(self, file):
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f = open(file, 'rb')
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try:
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tags = exifread.process_file(f)
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except:
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print('WARNING: NO EXIF TAGS?!?!?!?')
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AddLogForJob(job, "WARNING: No EXIF TAF found for: {}".format(file))
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f.close()
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fthumbnail = base64.b64encode(tags['JPEGThumbnail'])
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fthumbnail = str(fthumbnail)[2:-1]
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return fthumbnail
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def isVideo(self, file):
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try:
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fileInfo = MediaInfo.parse(file)
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for track in fileInfo.tracks:
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if track.track_type == "Video":
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return True
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return False
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except Exception as e:
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return False
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# Converts linux paths into windows paths
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# HACK: assumes c:, might be best to just look for [a-z]: ?
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def FixPath(self, p):
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if p.startswith('c:'):
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p = p.replace('/', '\\')
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return p
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# Returns an md5 hash of the fnames' contents
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def md5(self, fname):
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hash_md5 = hashlib.md5()
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with open(fname, "rb") as f:
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for chunk in iter(lambda: f.read(4096), b""):
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hash_md5.update(chunk)
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return hash_md5.hexdigest()
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def isImage(self, file):
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try:
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img = Image.open(file)
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return True
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except:
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return False
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def generateVideoThumbnail(self, file):
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#overall wrapper function for generating video thumbnails
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vcap = cv2.VideoCapture(file)
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res, im_ar = vcap.read()
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while im_ar.mean() < 15 and res:
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res, im_ar = vcap.read()
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im_ar = cv2.resize(im_ar, (160, 90), 0, 0, cv2.INTER_LINEAR)
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#save on a buffer for direct transmission
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res, thumb_buf = cv2.imencode('.jpeg', im_ar)
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# '.jpeg' etc are permitted
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#get the bytes content
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bt = thumb_buf.tostring()
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fthumbnail = base64.b64encode(bt)
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fthumbnail = str(fthumbnail)[2:-1]
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return fthumbnail
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##############################################################################
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def ProcessImportDirs(self):
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settings = session.query(Settings).first()
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if settings == None:
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raise Exception("Cannot create file data with no settings / import path is missing")
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last_import_date = settings.last_import_date
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paths = settings.import_path.split("#")
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for path in paths:
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# make new Job; HandleJobs will make them run later
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jex=JobExtra( name="path", value=path )
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job=Job(start_time='now()', last_update='now()', name="importdir", state="New", wait_for=None )
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job.extra.append(jex)
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session.add(job)
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# force commit to make job.id be valid in use of wait_for later
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session.commit()
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jex2=JobExtra( name="path", value=path )
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job2=Job(start_time='now()', last_update='now()', name="getfiledetails", state="New", wait_for=job.id )
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job2.extra.append(jex2)
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session.add(job2)
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print ("adding job2 id={}, wait_for={}, job is: {}".format( job2.id, job2.wait_for, job.id ) )
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return
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################################################################################
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# Class describing File in the database, and via sqlalchemy, connected to the DB as well
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# This has to match one-for-one the DB table
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################################################################################
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class EntryDirLink(Base):
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__tablename__ = "entry_dir_link"
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entry_id = Column(Integer, ForeignKey("entry.id"), primary_key=True )
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dir_eid = Column(Integer, ForeignKey("dir.eid"), primary_key=True )
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def __repr__(self):
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return "<entry_id: {}, dir_eid: {}>".format(self.entry_id, self.dir_eid)
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class Dir(Base):
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__tablename__ = "dir"
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eid = Column(Integer, ForeignKey("entry.id"), primary_key=True )
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path_prefix = Column(String, unique=False, nullable=False )
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num_files = Column(Integer)
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files = relationship("Entry", secondary="entry_dir_link")
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def __repr__(self):
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return "<eid: {}, path_prefix: {}>".format(self.eid, self.path_prefix)
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class Entry(Base):
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__tablename__ = "entry"
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id = Column(Integer, Sequence('file_id_seq'), primary_key=True )
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name = Column(String, unique=True, nullable=False )
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type_id = Column(Integer, ForeignKey("file_type.id"))
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type=relationship("FileType")
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dir_details = relationship( "Dir")
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file_details = relationship( "New_File" )
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in_dir = relationship ("Dir", secondary="entry_dir_link" )
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def __repr__(self):
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return "<id: {}, name: {}, type={}, dir_details={}, file_details={}, in_dir={}>".format(self.id, self.name, self.type, self.dir_details, self.file_details, self.in_dir)
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class New_File(Base):
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__tablename__ = "new_file"
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eid = Column(Integer, ForeignKey("entry.id"), primary_key=True )
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size_mb = Column(Integer, unique=False, nullable=False)
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hash = Column(Integer, unique=True, nullable=True)
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thumbnail = Column(String, unique=False, nullable=True)
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def __repr__(self):
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return "<eid: {}, size_mb={}, hash={}>".format(self.eid, self.size_mb, self.hash )
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class FileType(Base):
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__tablename__ = "file_type"
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id = Column(Integer, Sequence('file_type_id_seq'), primary_key=True )
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name = Column(String, unique=True, nullable=False )
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def __repr__(self):
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return "<id: {}, name={}>".format(self.id, self.name )
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class Settings(Base):
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__tablename__ = "settings"
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id = Column(Integer, Sequence('settings_id_seq'), primary_key=True )
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import_path = Column(String)
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last_import_date = Column(Float)
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def __repr__(self):
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return "<id: {}, import_path: {}, last_import_date: {}>".format(self.id, self.import_path, self.last_import_date)
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### Initiatlise the file data set
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filedata = FileData()
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################################################################################
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# classes for the job manager:
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# PA_JobManager overall status tracking),
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# Job (and Joblog) for each JOb, and
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# PA_Jobmanager_fe_message (to pass messages to the front-end web)
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################################################################################
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class PA_JobManager(Base):
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__tablename__ = "pa_job_manager"
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id = Column(Integer, Sequence('pa_job_manager_id_seq'), primary_key=True)
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state = Column(String)
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num_active_jobs = Column(Integer)
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num_completed_jobs = Column(Integer)
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def __repr__(self):
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return "<id={}, state={}, num_active_jobs={}, num_completed_jobs={}>".format( self.id, self.state, self.num_active_jobs, self.num_completed_jobs )
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class Joblog(Base):
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__tablename__ = "joblog"
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id = Column(Integer, Sequence('joblog_id_seq'), primary_key=True )
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job_id = Column(Integer, ForeignKey('job.id') )
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log_date = Column(DateTime(timezone=True))
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log = Column(String)
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def __repr__(self):
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return "<id: {}, job_id: {}, log_date: {}, log: {}".format(self.id, self.job_id, self.log_date, self.log )
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class JobExtra(Base):
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__tablename__ = "jobextra"
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id = Column(Integer, Sequence('jobextra_id_seq'), primary_key=True )
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job_id = Column(Integer, ForeignKey('job.id') )
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name = Column(String)
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value = Column(String)
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def __repr__(self):
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return "<id: {}, job_id: {}, name: {}, value: {}>".format(self.id, self.job_id, self.name, self.value )
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class Job(Base):
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__tablename__ = "job"
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id = Column(Integer, Sequence('job_id_seq'), primary_key=True )
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start_time = Column(DateTime(timezone=True))
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last_update = Column(DateTime(timezone=True))
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name = Column(String)
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state = Column(String)
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num_passes = Column(Integer)
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current_pass = Column(Integer)
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num_files = Column(Integer)
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current_file_num = Column(Integer)
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current_file = Column(String)
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wait_for = Column(Integer)
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pa_job_state = Column(String)
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logs = relationship( "Joblog")
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extra = relationship( "JobExtra")
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def __repr__(self):
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return "<id: {}, start_time: {}, last_update: {}, name: {}, state: {}, num_passes: {}, current_pass: {}, num_files: {}, current_file_num: {}, current_file: {}, pa_job_state: {}, wait_for: {}, extra: {}, logs: {}>".format(self.id, self.start_time, self.last_update, self.name, self.state, self.num_passes, self.current_pass, self.num_files, self.current_file_num, self.current_file, self.pa_job_state, self.wait_for, self.extra, self.logs)
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class PA_JobManager_FE_Message(Base):
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__tablename__ = "pa_job_manager_fe_message"
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id = Column(Integer, Sequence('pa_job_manager_fe_message_id_seq'), primary_key=True )
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job_id = Column(Integer, ForeignKey('job.id'), primary_key=True )
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alert = Column(String)
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message = Column(String)
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def __repr__(self):
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return "<id: {}, job_id: {}, alert: {}, message: {}".format(self.id, self.job_id, self.alert, self.message)
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def MessageToFE( job_id, alert, message ):
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msg = PA_JobManager_FE_Message( job_id=job_id, alert=alert, message=message)
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session.add(msg)
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session.commit()
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def GetJobs():
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return session.query(Job).all()
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def InitialiseManager():
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global pa_eng
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pa_eng=session.query(PA_JobManager).first()
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if( pa_eng == None ):
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pa_eng = PA_JobManager(state='Initialising', num_active_jobs=0, num_completed_jobs=0 )
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session.add(pa_eng)
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return
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def AddLogForJob(job, message, current_file=''):
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now=datetime.now(pytz.utc)
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log=Joblog( job_id=job.id, log=message, log_date=now )
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job.last_update=now
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job.current_file=current_file
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session.add(log)
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return
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def RunJob(job):
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if job.name =="scannow":
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JobScanNow(job)
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elif job.name =="forcescan":
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JobForceScan(job)
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elif job.name =="importdir":
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JobImportDir(job)
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elif job.name =="getfiledetails":
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JobGetFileDetails(job)
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else:
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print("Requested to process unknown job type: {}".format(job.name))
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return
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def HandleJobs():
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global pa_eng
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print("PA job manager is scanning for new jobs to process")
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pa_eng.state = 'Scanning Jobs'
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jobs=GetJobs()
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pa_eng.num_active_jobs=0
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pa_eng.num_completed_jobs=0
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for job in jobs:
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if job.pa_job_state != 'Completed':
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if job.wait_for != None:
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j2 = session.query(Job).get(job.wait_for)
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if not j2:
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print ("WTF? job.wait_for ({}) does not exist in below? ".format( job.wait_for ))
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for j in session.query(Job).all():
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print ("j={}".format(j.id))
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continue
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if j2.pa_job_state != 'Completed':
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continue
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# use this to remove threads for easier debugging, and errors will stacktrace to the console
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if DEBUG==1:
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print("*************************************")
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print("RUNNING job: id={} name={} wait_for={}".format(job.id, job.name, job.wait_for ))
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RunJob(job)
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else:
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try:
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threading.Thread(target=RunJob, args=(job,)).start()
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except Exception as e:
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try:
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MessageToFE( job.id, "danger", "Failed with: {} (try job log for details)".format(e) )
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except Exception as e2:
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print("Failed to let front-end know, but back-end Failed to run job (id: {}, name: {} -- orig exep was: {}, this exception was: {})".format( job.id, job.name, e, e2) )
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print("PA job manager is waiting jobs")
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pa_eng.state = 'Waiting for new Jobs'
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return
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def JobScanNow(job):
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filedata.GenerateFileData(job)
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job.state="Completed"
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job.pa_job_state="Completed"
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job.last_update=datetime.now(pytz.utc)
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MessageToFE( job.id, "success", "Completed (scan for new files)" )
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session.commit()
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return
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def JobForceScan(job):
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session.query(File).delete()
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settings = session.query(Settings).first()
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if settings == None:
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raise Exception("Cannot create file data with no settings / import path is missing")
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settings.last_import_date = 0
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session.commit()
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filedata.GenerateFileData(job)
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job.state="Completed"
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job.pa_job_state="Completed"
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job.last_update=datetime.now(pytz.utc)
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MessageToFE( job.id, "success", "Completed (forced remove and recreation of all file data)" )
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session.commit()
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return
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# to serve static content of the images, we create a symlink from inside the static subdir of each import_path that exists
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def MakeSymlink(job,path):
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symlink = FixPath('static/{}'.format( os.path.basename(path[0:-1])))
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if not os.path.exists(symlink):
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os.symlink(path, symlink)
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return symlink
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def AddDir(job, dirname, path_prefix, in_dir):
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dir=Dir( path_prefix=path_prefix, num_files=0 )
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dtype = session.query(FileType).filter(FileType.name=='Directory').first()
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e=Entry( name=dirname, type=dtype )
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e.dir_details.append(dir)
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# this occurs when we Add the actual Dir for the import_path
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if in_dir:
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e.in_dir.append(in_dir)
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AddLogForJob(job, "DEBUG: AddDir: {} in (dir_id={})".format(dirname, in_dir) )
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session.add(e)
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return dir
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def AddFile(job, fname, type_str, fsize, in_dir ):
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ftype = session.query(FileType).filter(FileType.name==type_str).first()
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e=Entry( name=fname, type=ftype )
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f=New_File( size_mb=fsize )
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e.file_details.append(f)
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e.in_dir.append(in_dir)
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AddLogForJob(job, "Found new file: {}".format(fname) )
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session.add(e)
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return e
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def JobImportDir(job):
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print("DEBUG: Importing dir")
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settings = session.query(Settings).first()
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if settings == None:
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raise Exception("Cannot create file data with no settings / import path is missing")
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last_import_date = settings.last_import_date
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file_cnt=0
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for jex in job.extra:
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if jex.name =="path":
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path = FixPath( jex.value)
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AddLogForJob(job, "Checking Import Directory: {}".format( path ) )
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print("DEBUG: Checking Import Directory: {}".format( path ) )
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if os.path.exists( path ):
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symlink=MakeSymlink(job,path)
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dir=AddDir(job, os.path.basename(path[0:-1]), symlink, None )
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import_dir=dir
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for file in sorted(glob.glob(path + '**', recursive=True)):
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if file == path:
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continue
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fname=file.replace(path, "")
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stat = os.stat(file)
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if last_import_date == 0 or stat.st_ctime > last_import_date:
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AddLogForJob(job, "DEBUG: {} - {} is newer than {}".format( file, stat.st_ctime, last_import_date ) )
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print("DEBUG: {} - {} is newer than {}".format( file, stat.st_ctime, last_import_date ) )
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if os.path.isdir(file):
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path_prefix=os.path.join(symlink,fname)
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dir=AddDir( job, fname, path_prefix, dir )
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else:
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file_cnt=file_cnt+1
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if isImage(file):
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type_str = 'Image'
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elif isVideo(file):
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type_str = 'Video'
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else:
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type_str = 'File'
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fsize = round(os.stat(file).st_size/(1024*1024))
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e=AddFile( job, os.path.basename(fname), type_str, fsize, dir )
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else:
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AddLogForJob(job, "DEBUG: {} - {} is OLDER than {}".format( file, stat.st_ctime, last_import_date ), file )
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print("DEBUG: {} - {} is OLDER than {}".format( file, stat.st_ctime, last_import_date ), file )
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import_dir.num_files=file_cnt
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AddLogForJob(job, "Finished Importing: {} - Found {} new files".format( path, file_cnt ) )
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job.pa_job_state = "Completed"
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job.state = "Completed"
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job.last_updated = datetime.now(pytz.utc)
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# settings.last_import_date = time.time()
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else:
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AddLogForJob(job, "Finished Importing: {} -- Path does not exist".format( path) )
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job.pa_job_state = "Completed"
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job.state = "Failed"
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job.last_updated = datetime.now(pytz.utc)
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for j in session.query(Job).filter(Job.wait_for==job.id).all():
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print("DEBUG: cancelling job: {} as it was waiting for this failed job: {}".format(job.id, j.id) )
|
|
j.pa_job_state = "Completed"
|
|
j.state = "Withdrawn"
|
|
j.last_updated = datetime.now(pytz.utc)
|
|
AddLogForJob(j, "Job has been withdrawn as the job being waited for failed")
|
|
session.commit()
|
|
return
|
|
|
|
def FilesInDir( path ):
|
|
d=session.query(Dir).filter(Dir.path_prefix==path).first()
|
|
return d.files
|
|
|
|
|
|
def ProcessFilesInDir(job, e):
|
|
print("files in dir - process: {}".format(e.name))
|
|
if e.type.name != 'Directory':
|
|
e.file_details[0].hash = md5( job, os.path.join( e.in_dir[0].path_prefix, e.name ) )
|
|
if e.type.name == 'Image':
|
|
e.file_details[0].thumbnail = GenImageThumbnail( job, os.path.join( e.in_dir[0].path_prefix, e.name ) )
|
|
elif e.type.name == 'Video':
|
|
e.file_details[0].thumbnail = GenVideoThumbnail( job, os.path.join( e.in_dir[0].path_prefix, e.name ) )
|
|
else:
|
|
print("need to better process: {}".format(e))
|
|
d=session.query(Dir).filter(Dir.eid==e.id).first()
|
|
for sub in d.files:
|
|
ProcessFilesInDir(job, sub )
|
|
|
|
def JobGetFileDetails(job):
|
|
print("JobGetFileDetails:")
|
|
for jex in job.extra:
|
|
if jex.name =="path":
|
|
path=jex.value
|
|
path=FixPath('static/{}'.format( os.path.basename(path[0:-1])))
|
|
print(" for path={}".format( path ) )
|
|
for e in FilesInDir( path ):
|
|
ProcessFilesInDir(job, e )
|
|
job.pa_job_state = "Completed"
|
|
job.state = "Completed"
|
|
job.last_updated = datetime.now(pytz.utc)
|
|
session.commit()
|
|
return
|
|
|
|
def isVideo(file):
|
|
try:
|
|
fileInfo = MediaInfo.parse(file)
|
|
for track in fileInfo.tracks:
|
|
if track.track_type == "Video":
|
|
return True
|
|
return False
|
|
except Exception as e:
|
|
return False
|
|
|
|
# Converts linux paths into windows paths
|
|
# HACK: assumes c:, might be best to just look for [a-z]: ?
|
|
def FixPath(p):
|
|
if p.startswith('c:'):
|
|
p = p.replace('/', '\\')
|
|
return p
|
|
|
|
# Returns an md5 hash of the fnames' contents
|
|
def md5(job, fname):
|
|
hash_md5 = hashlib.md5()
|
|
with open(fname, "rb") as f:
|
|
for chunk in iter(lambda: f.read(4096), b""):
|
|
hash_md5.update(chunk)
|
|
hash = hash_md5.hexdigest()
|
|
AddLogForJob( job, "Generated md5 hash: {} for file: {}".format( hash, fname ) )
|
|
return hash
|
|
|
|
def isImage(file):
|
|
try:
|
|
img = Image.open(file)
|
|
return True
|
|
except:
|
|
return False
|
|
|
|
def GenImageThumbnail(job, file):
|
|
AddLogForJob( job, "Generate Thumbnail from Image file: {}".format( file ) )
|
|
f = open(file, 'rb')
|
|
try:
|
|
tags = exifread.process_file(f)
|
|
except:
|
|
print('WARNING: NO EXIF TAGS?!?!?!?')
|
|
AddLogForJob(job, "WARNING: No EXIF TAF found for: {}".format(file))
|
|
f.close()
|
|
|
|
thumbnail = base64.b64encode(tags['JPEGThumbnail'])
|
|
thumbnail = str(thumbnail)[2:-1]
|
|
return thumbnail
|
|
|
|
def GenVideoThumbnail(job, file):
|
|
AddLogForJob( job, "Generate Thumbnail from Video file: {}".format( file ) )
|
|
vcap = cv2.VideoCapture(file)
|
|
res, im_ar = vcap.read()
|
|
while im_ar.mean() < 15 and res:
|
|
res, im_ar = vcap.read()
|
|
im_ar = cv2.resize(im_ar, (160, 90), 0, 0, cv2.INTER_LINEAR)
|
|
res, thumb_buf = cv2.imencode('.jpeg', im_ar)
|
|
bt = thumb_buf.tostring()
|
|
thumbnail = base64.b64encode(bt)
|
|
thumbnail = str(thumbnail)[2:-1]
|
|
return thumbnail
|
|
|
|
|
|
if __name__ == "__main__":
|
|
print("PA job manager starting")
|
|
try:
|
|
InitialiseManager()
|
|
filedata.ProcessImportDirs()
|
|
session.commit()
|
|
except Exception as e:
|
|
print( "Failed to initialise PA Job Manager: {}".format(e) )
|
|
session.rollback()
|
|
HandleJobs()
|
|
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
|
|
s.bind((PA_JOB_MANAGER_HOST, PA_JOB_MANAGER_PORT))
|
|
s.listen()
|
|
while True:
|
|
conn, addr = s.accept()
|
|
print("Connection from: {} so HandleJobs".format(addr))
|
|
HandleJobs()
|