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# -*- coding: utf-8 -*-
from PyQt4.QtCore import (
QDateTime,
SIGNAL,
)
from PyQt4.QtGui import (
QMessageBox,
)
from PyQt4.QtSql import (
QSqlDatabase,
QSqlQuery,
QSqlTableModel,
QVariant,
)
import ConfigParser
import os
import shutil
import sys
import threading
import urllib2
import zipfile
from util import (
doAlert,
doQuestion,
)
class DataModel(QSqlTableModel):
defaultDbFile = os.path.join(
os.path.split(os.path.realpath(__file__))[0], "models.sqlite")
def __init__(self, parent=None, filename=None):
self.installThreads = {}
self.processes = set()
if filename is None:
filename = DataModel.defaultDbFile
self.db = QSqlDatabase.addDatabase('QSQLITE')
print >> sys.stderr, "Open database at %s" % filename
self.db.setDatabaseName(filename)
self.db.open()
query = QSqlQuery(
'SELECT COUNT(*) '
'FROM sqlite_master '
'WHERE type="table" AND tbl_name="models"',
self.db)
if not query.next() or query.value(0).toInt()[0] < 1:
# Create new table.
print >> sys.stderr, "Table not find, create the table"
query = QSqlQuery(
'CREATE TABLE models ('
'ID INTEGER PRIMARY KEY AUTOINCREMENT, '
'name TEXT, '
'status TEXT, '
'srclang TEXT, '
'trglang TEXT, '
'date DATE, '
'path TEXT, '
'mosesini TEXT, '
'origin TEXT, '
'originMode TEXT, '
'deleted TEXT)',
self.db)
if query.next():
print >> sys.stderr, query.value(0).toString()
# TODO: shoudn't design the deletion checking like this
# Change all deleted models into not deleted in case it failed last
# time.
query = QSqlQuery(
'UPDATE models SET deleted="False" WHERE deleted="True"', self.db)
query = QSqlQuery(
'UPDATE models SET status="READY" WHERE status="ON"', self.db)
super(DataModel, self).__init__(parent, self.db)
self.setTable("models")
self.select()
self.setEditStrategy(QSqlTableModel.OnFieldChange)
def destroy(self):
bExit = False
for i in self.installThreads:
t, flag = self.installThreads[i]
if t.isAlive() and flag:
if not bExit:
if not doQuestion(
"Installing process is running in the background, "
"do you want to terminate them and exit?"):
return False
else:
bExit = True
self.installThreads[i][1] = False
t.join()
if self.db:
self.db.close()
self.db = None
return True
def getQSqlDatabase(self):
return self.db
def getRowID(self, row):
record = self.record(row)
return record.value('ID')
def delModel(self, row):
record = self.record(row)
if str(record.value('deleted').toString()) == 'True':
self.emit(
SIGNAL("messageBox(QString)"),
"The model is deleting, please be patient!")
return
# Hint to decide what to delete.
text = '''You are going to delete the selected model entry.
Do you also want to delete all the model files on the disk?
Click "Yes" to delete model entry and model files.
Click "No" to delete model entry but keep model files.
Click "Cancel" to do nothing.'''
reply = QMessageBox.question(
None, 'Message', text, QMessageBox.Yes, QMessageBox.No,
QMessageBox.Cancel)
if reply == QMessageBox.Cancel:
return
else:
record.setValue('deleted', 'True')
self.changeRecord(row, record)
def delModelThread():
irowid, _ = record.value("ID").toInt()
if irowid in self.installThreads:
t, flag = self.installThreads[irowid]
if t.isAlive() and flag:
self.installThreads[irowid][1] = False
t.join()
if reply == QMessageBox.Yes:
destDir = str(record.value("path").toString())
try:
shutil.rmtree(destDir)
except Exception as e:
self.emit(
SIGNAL("messageBox(QString)"),
"Failed to remove dir: " + destDir)
print >> sys.stderr, str(e)
self.removeRow(row)
# End of Model deleting thread.
t = threading.Thread(target=delModelThread)
t.start()
def newEntry(self):
import random
rec = self.record()
for i in xrange(1, 10):
rec.setValue(i, QVariant(str(random.random())))
self.insertRecord(-1, rec)
doAlert(self.query().lastInsertId().toString())
def changeRecord(self, curRow, record):
# self.emit(SIGNAL("recordUpdated(bool)"), True) #record selection
self.setRecord(curRow, record)
# self.emit(SIGNAL("recordUpdated(bool)"), False) #restore selection
def installModel(self, installParam):
dest = installParam['dest']
# Make dir.
if not os.path.exists(dest):
try:
os.makedirs(str(dest))
except:
doAlert("Failed to create install directory: %s" % dest)
return
# Create entry in db.
rec = self.record()
rec.setValue('name', installParam['modelName'])
rec.setValue('status', 'Fetching Source...')
rec.setValue('path', dest)
rec.setValue('origin', installParam['source'])
rec.setValue('originMode', installParam['sourceMode'])
rec.setValue('date', QDateTime.currentDateTime())
rec.setValue('deleted', 'False')
self.insertRecord(-1, rec)
rowid = self.query().lastInsertId()
# Start thread.
def installThread(irowid):
# Find the current row in model.
def updateRecord(keyvalues):
curRow = None
# TODO: use binary search instead of linear
for i in xrange(0, self.rowCount()):
if self.record(i).value("ID") == rowid:
curRow = i
break
if curRow is not None:
record = self.record(curRow)
for key in keyvalues:
record.setValue(key, keyvalues[key])
self.changeRecord(curRow, record)
return curRow
def checkExit():
# Check thread is ok to run.
if irowid not in self.installThreads or not self.installThreads[irowid][1]:
return True
else:
return False
def markExit():
if irowid in self.installThreads: # Set thread to dead.
self.installThreads[irowid][1] = False
def statusMessageLogMarkExit(status=None, message=None,
exception=None):
if status is not None:
updateRecord({'status': status})
if message is not None:
self.emit(SIGNAL("messageBox(QString)"), message)
print >> sys.stderr, message
if exception is not None:
print >> sys.stderr, str(exception)
markExit()
# 1. Download or copy from local.
# Where the downloaded/copied zip file is:
destFile = os.path.join(str(dest), "model.zip")
# Where the unzipped contents are:
destDir = os.path.join(str(dest), "model")
if installParam['sourceMode'] == 'Local':
fin = fout = None
try:
inFile = str(installParam['source'])
total_size = os.path.getsize(inFile)
fin = open(inFile, 'rb')
chunk_size = 52428800 # 50MB as chunk size
fout = open(destFile, 'wb')
content = fin.read(chunk_size)
download_size = content_size = len(content)
lastMsg = ""
while content_size > 0:
# Check if thread is notified as exit.
if checkExit():
return statusMessageLogMarkExit()
fout.write(content)
if total_size > 0:
msg = 'COPY %.0f%%' % (
download_size * 100.0 / total_size)
else:
msg = 'COPY %d MB' % (download_size / 1048576)
if msg != lastMsg:
updateRecord({'status': msg})
lastMsg = msg
content = fin.read(chunk_size)
content_size = len(content)
download_size += content_size
except Exception as e:
return statusMessageLogMarkExit(
status=(
'Failed copying from: %s'
% installParam['source']),
message=(
"Failed copy model: %s"
% installParam['modelName']),
exception=e)
finally:
if fin:
fin.close()
if fout:
fout.close()
elif installParam['sourceMode'] == 'Internet':
conn = fout = None
try:
conn = urllib2.urlopen(str(installParam['source']))
total_size = int(conn.headers['Content-Length'])
chunk_size = 1048576 # 1MB as chunk size
fout = open(destFile, 'wb')
content = conn.read(chunk_size)
download_size = content_size = len(content)
lastMsg = ""
while content_size > 0:
# Check if thread is notified as exit.
if checkExit():
return statusMessageLogMarkExit()
fout.write(content)
if total_size > 0:
msg = 'DOWNLOAD %.0f%%' % (
download_size * 100.0 / total_size)
else:
msg = 'DOWNLOAD %d MB' % (download_size / 1048576)
if msg != lastMsg:
updateRecord({'status': msg})
lastMsg = msg
content = conn.read(chunk_size)
content_size = len(content)
download_size += content_size
except Exception as e:
return statusMessageLogMarkExit(
status=(
'Failed downloading from: %s'
% installParam['source']),
message=(
"Failed download model: %s"
% installParam['modelName']),
exception=e)
finally:
if conn:
conn.close()
if fout:
fout.close()
else:
return statusMessageLogMarkExit(
status='Unsupported source mode: %s'
% installParam['sourceMode'])
# 2. Unzip.
zfile = fout = None
try:
zfile = zipfile.ZipFile(destFile)
# Check property files.
if "model.ini" not in zfile.namelist():
return statusMessageLogMarkExit(
status=(
'Missing model.ini in model file: %s'
% installParam['sourceMode']),
message=(
"Invalid modle file format because model.ini "
"is missing in the zipped model file, exit "
"installation for model %s"
% installParam['modelName']))
chunk_size = 52428800 # 50MB as chunk size
# Get file size uncompressed.
total_size = 0
for name in zfile.namelist():
total_size += zfile.getinfo(name).file_size
download_size = 0
lastMsg = ""
for i, name in enumerate(zfile.namelist()):
(dirname, filename) = os.path.split(name)
outDir = os.path.join(destDir, dirname)
if not os.path.exists(outDir):
os.makedirs(outDir)
if filename:
fin = zfile.open(name, 'r')
outFile = os.path.join(destDir, name)
fout = open(outFile, 'wb')
content = fin.read(chunk_size)
content_size = len(content)
download_size += content_size
while content_size > 0:
# Check if thread is notified as exit.
if checkExit():
return statusMessageLogMarkExit()
fout.write(content)
if total_size > 0:
msg = 'UNZIP %.0f%%' % (
download_size * 100.0 / total_size)
else:
msg = 'UNZIP %d MB' % (
download_size / 1048576)
if msg != lastMsg:
updateRecord({'status': msg})
lastMsg = msg
content = fin.read(chunk_size)
content_size = len(content)
download_size += content_size
fin.close()
fout.close()
except Exception as e:
return statusMessageLogMarkExit(
status=(
'Failed unzipping from: %s' % installParam['source']),
message=(
"Failed unzip model: %s" % installParam['modelName']),
exception=e)
finally:
if zfile:
zfile.close()
if fin:
fin.close()
if fout:
fout.close()
# 3 Post process and check data validity.
try:
modelini = os.path.join(destDir, "model.ini")
cp = ConfigParser.RawConfigParser()
cp.read(modelini)
mosesini = os.path.join(destDir, 'moses.ini')
if not os.path.exists(mosesini):
raise Exception("Moses ini doesn't exist")
updateRecord({
'srclang': cp.get("Language", 'Source Language').upper(),
'trglang': cp.get("Language", 'Target Language').upper(),
'mosesini': mosesini},
)
except Exception as e:
return statusMessageLogMarkExit(
status='ERROR model format %s' % installParam['source'],
message=(
"Unspported model format: %s"
% installParam['modelName']),
exception=e)
statusMessageLogMarkExit(
status='READY',
message="Model %s Installed!" % installParam['modelName'])
# Send new model signal.
self.emit(SIGNAL("modelInstalled()")) # Record selection.
return
# End of thread func.
# Start the thread.
irowid, _ = rowid.toInt()
t = threading.Thread(target=installThread, args=(irowid, ))
if irowid in self.installThreads: # If old thread is there.
print >> sys.stderr, (
"table rowid %d already has a thread running, stop it"
% irowid)
self.installThreads[irowid][1] = False
self.installThreads[irowid] = [t, True]
t.start()
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