#!/usr/bin/env python
# -----------------------------------------------------------------------
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
# -----------------------------------------------------------------------


import os
import sys
import getopt


#
# This is a one-time-use utility to move your history and checkpoint files
# int the database.  It will not run if the database is already populated.
#
# If you need to run it again, you must first remove or drop your existing database.
#
from ducc_util import DuccUtil

class DbLoader(DuccUtil):

    def __init__(self):
        DuccUtil.__init__(self, True)

    def usage(self, *args):
        if ( args[0] != None ):
            print ''
            print ' '.join(args)
            print ''
        print 'Usage:'
        print ''
        print 'db_loader -i runtime [-t #threads] [--no-archive]'
        print ''
        print 'Where:'
        print '    -i runtime'
        print '         Specifies the DUCC_HOME of the DUCC runtime to be moved into the database.'
        print ''
        print '    -t #threads'
        print '         Specifies number of processing threads (default is 10)'
        print ''
        print '    --no-archive'
        print '         Suppresses archival of the input files.'
        print ''
        print 'Notes:'
        print '    1.  Because this is a bootstrap script DUCC must be stopped.'
        print '        The database will be started & stopped by this script.'
        print '    2.  Reducing the number of processing threads will reduce the CPU load but'
        print '        increase the processing time.'
        print '    3.  Archival consists of renaming relevent input directories and files by appending'
        print '        ".archive" to their names.  It is fully non-destructive and may be reversed by'
        print '        manually renaming them back to their original names.'

        sys.exit(1);

    def main(self, argv):

        in_home = None
        out_url = None
        archive = True
        nthreads = '10'
        try:
            opts, args = getopt.getopt(argv, 'i:t:h?', ['no-archive'])
        except:
            self.usage("Invalid arguments", ' '.join(argv))

        for ( o, a ) in opts:
            if o in ('-i'):
                in_home = a
            elif o in ('-t'):
                nthreads = a
            elif o in ('--no-archive'):
                archive = False
            else:
                self.usage(None)


        if ( in_home == None ):
            self.usage("Missing input DUCC_HOME")

        out_url = self.ducc_properties.get('ducc.database.host')
        if ( out_url == None ):
            self.usage("Cannot find 'ducc.database.host' in your properties file.");

        self.db_start()

        if ( not self.db_alive(3) ):
            print "Database is not running or cannot be contacted."
            return

        DUCC_JVM_OPTS = '-DDUCC_HOME=' + self.DUCC_HOME

        if ( not archive ):
            DUCC_JVM_OPTS = DUCC_JVM_OPTS + ' -DDONT_ARCHIVE'

        CMD = [self.java(), DUCC_JVM_OPTS, 'org.apache.uima.ducc.database.DbLoader', in_home, out_url, nthreads]
        CMD = ' '.join(CMD)

        os.environ['CLASSPATH'] = os.environ['CLASSPATH'] + ':' + self.DUCC_HOME + "/resources"
        print 'CLASSPATH', os.environ['CLASSPATH']
        print 'Executing', CMD
        os.system(CMD)


        self.db_stop()
                
if __name__ == "__main__":
    console = DbLoader()
    console.main(sys.argv[1:])