*: Don't forget to close opened ZODB storage

Storages need to be closed to indicate a clean access end. If a storage is
not closed cleanly it might require to spend time and resources on next
open. For example FileStorage might need to recompute the index.

/reviewed-on !6

zodbtools/zodbanalyze.py

@@ -12,6 +12,7 @@ import shutil
 from ZODB.FileStorage import FileIterator, FileStorage, packed_version
 from ZODB.FileStorage.format import FileStorageFormatter
 from ZODB.utils import get_pickle_metadata
+from golang import func, defer
 
 class DeltaFileStorage(
     FileStorageFormatter,
@@ -22,6 +23,9 @@ class DeltaFileStorage(
     def iterator(self, start=None, stop=None):
         return DeltaFileIterator(self._file_name, start, stop)
 
+    def close(self):
+        pass
+
 class DeltaFileIterator(FileIterator):
     def __init__(self, filename, start=None, stop=None, pos=0L):
         assert isinstance(filename, str)
@@ -157,11 +161,13 @@ def report(rep, csv=False):
                           rep.FBYTES * 100.0 / rep.DBYTES,
                           rep.FBYTES * 1.0 / rep.FOIDS)
 
+@func
 def analyze(path, use_dbm, delta_fs):
     if delta_fs:
         fs = DeltaFileStorage(path, read_only=1)
     else:
         fs = FileStorage(path, read_only=1)
+    defer(fs.close)
     fsi = fs.iterator()
     report = Report(use_dbm, delta_fs)
     for txn in fsi:

zodbtools/zodbcmp.py

@@ -34,6 +34,7 @@ from __future__ import print_function
 from zodbtools.util import ashex, inf, nextitem, txnobjv, parse_tidrange, TidRangeInvalid,  \
         storageFromURL
 from time import time
+from golang import func, defer
 
 # compare two storage transactions
 # 0 - equal, 1 - non-equal
@@ -127,6 +128,7 @@ Options:
     -h  --help      show this help
 """, file=out)
 
+@func
 def main2(argv):
     verbose = False
 
@@ -159,8 +161,8 @@ def main2(argv):
             print("E: invalid tidrange: %s" % e, file=sys.stderr)
             sys.exit(2)
 
-    stor1 = storageFromURL(storurl1, read_only=True)
-    stor2 = storageFromURL(storurl2, read_only=True)
+    stor1 = storageFromURL(storurl1, read_only=True);   defer(stor1.close)
+    stor2 = storageFromURL(storurl2, read_only=True);   defer(stor2.close)
 
     zcmp = storcmp(stor1, stor2, tidmin, tidmax, verbose)
     sys.exit(1 if zcmp else 0)

zodbtools/zodbcommit.py

@@ -44,7 +44,7 @@ from zodbtools.util import ashex, storageFromURL
 from ZODB.utils import p64, u64, z64
 from ZODB.POSException import POSKeyError
 from ZODB._compat import BytesIO
-from golang import panic
+from golang import func, defer, panic
 
 
 # zodbcommit commits new transaction into ZODB storage with data specified by
@@ -135,6 +135,7 @@ Options:
     -h  --help      show this help
 """, file=out)
 
+@func
 def main(argv):
     try:
         optv, argv = getopt.getopt(argv[1:], "h", ["help"])
@@ -156,6 +157,7 @@ def main(argv):
     at = argv[1].decode('hex')
 
     stor = storageFromURL(storurl)
+    defer(stor.close)
 
     zin = 'txn 0000000000000000 " "\n'  # artificial transaction header
     zin += sys.stdin.read()

zodbtools/zodbdump.py

@@ -65,7 +65,7 @@ import sys
 import logging
 import re
 from golang.gcompat import qq
-from golang import strconv
+from golang import func, defer, strconv
 
 # txn_raw_extension returns raw extension from txn metadata
 def txn_raw_extension(stor, txn):
@@ -240,6 +240,7 @@ Options:
     -h  --help      show this help
 """, file=out)
 
+@func
 def main(argv):
     hashonly = False
 
@@ -273,6 +274,7 @@ def main(argv):
             sys.exit(2)
 
     stor = storageFromURL(storurl, read_only=True)
+    defer(stor.close)
 
     zodbdump(stor, tidmin, tidmax, hashonly)
 

zodbtools/zodbinfo.py

@@ -22,6 +22,7 @@
 from __future__ import print_function
 from zodbtools.util import ashex, storageFromURL
 from collections import OrderedDict
+from golang import func, defer
 import sys
 
 # {} parameter_name -> get_parameter(stor)
@@ -71,6 +72,7 @@ Options:
     -h  --help      show this help
 """, file=out)
 
+@func
 def main(argv):
     try:
         optv, argv = getopt.getopt(argv[1:], "h", ["help"])
@@ -91,5 +93,6 @@ def main(argv):
         sys.exit(2)
 
     stor = storageFromURL(storurl, read_only=True)
+    defer(stor.close)
 
     zodbinfo(stor, argv[1:])