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1
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import boto
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2
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import boto.s3.connection
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3
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import sys
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4
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import pymongo
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5
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from pymongo import MongoClient
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6
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import os.path
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7
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import time
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8
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9
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10
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11
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def file_exist(bucket, file_path):
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12
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c =bucket.get_key(file_path)
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13
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if c is not None and c.size > 0:
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14
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return True
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15
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return False
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16
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17
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def exportItemForMongoCollection(obsId, db, bucket, log_file):
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18
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destination_collection =db[ 's3_'+obsId[:36]]
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19
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source_collection = db[ obsId[:36]]
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20
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print 'Start to exporting objectStore :%s '%obsId
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21
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i = 0
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22
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last_percentage = 0
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23
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total = source_collection.estimated_document_count()
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24
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for item in source_collection.find(no_cursor_timeout=True):
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25
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fs_path = item['fsPath']
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26
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objectId = item['id']
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27
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dest_item = destination_collection.find_one(objectId)
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28
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if dest_item is None:
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29
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if os.path.isfile(fs_path):
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30
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i += 1
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31
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if not file_exist(bucket, '%s/%s'%(obsId,objectId)):
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32
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key = bucket.new_key('%s/%s'%(obsId,objectId))
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33
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try:
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34
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key.set_contents_from_filename(fs_path)
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35
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except Exception as e:
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36
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time.sleep(10)
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37
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key.set_contents_from_filename(fs_path)
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38
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39
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item.pop('_id', None)
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40
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item.pop('fsPath')
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41
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item['uri'] = 's3://%s/%s'%(bucket.name, key.name)
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42
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destination_collection.insert_one(item)
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43
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if i % 1000 == 0:
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print "Exported %i/%i"%(i, total)
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45
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else:
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46
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log_file.writeline('Missing file for objectStoreid: %s ObjectId:%s path: %s'%(obsId, objectId, fs_path))
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47
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48
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49
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def start_import(metadataCollection, bucket, log_file):
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50
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client = MongoClient()
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51
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db = client['objectStore']
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52
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metadataCollection = db[metadataCollection]
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53
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for item in metadataCollection.find(no_cursor_timeout=True):
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54
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obsId = item['obsId']
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55
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exportItemForMongoCollection(obsId, db, bucket, log_file)
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56
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print "creating Index on ID"
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57
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destination_collection.create_index([('id',pymongo.ASCENDING)])
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58
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59
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60
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61
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62
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63
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if __name__=='__main__':
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64
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args = sys.argv
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65
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if not len(args) is not 3 :
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66
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print "Error on applying script usage: python scriptName.py s3cfgPath objectstoreBucket"
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67
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f = open(args[1])
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68
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props = {}
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69
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for line in f:
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70
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d =line.split('=')
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71
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if len(d) == 2:
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72
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props[d[0].strip()] = d[1].strip()
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73
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74
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bname = args[2]
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75
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conn = boto.connect_s3(aws_access_key_id = props['access_key'], aws_secret_access_key = props['secret_key'], host = props['host_base'], calling_format = boto.s3.connection.OrdinaryCallingFormat())
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76
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bucket = conn.get_bucket(bname, validate=True)
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77
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log_file = open('s3_migration.log', 'w')
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78
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start_import('metadataObjectStore',bucket, log_file)
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79
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log_file.close()
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