6 from fresh import FreshBase, convertTime
8 _logger = logging.getLogger('arvados.arvados_fuse')
10 class File(FreshBase):
11 """Base for file objects."""
13 def __init__(self, parent_inode, _mtime=0):
14 super(File, self).__init__()
16 self.parent_inode = parent_inode
22 def readfrom(self, off, size, num_retries=0):
25 def writeto(self, off, size, num_retries=0):
26 raise Exception("Not writable")
31 def clear(self, force=False):
40 class FuseArvadosFile(File):
41 """Wraps a ArvadosFile."""
43 def __init__(self, parent_inode, arvfile, _mtime):
44 super(FuseArvadosFile, self).__init__(parent_inode, _mtime)
45 self.arvfile = arvfile
48 return self.arvfile.size()
50 def readfrom(self, off, size, num_retries=0):
51 with llfuse.lock_released:
52 return self.arvfile.readfrom(off, size, num_retries, exact=True)
54 def writeto(self, off, buf, num_retries=0):
55 with llfuse.lock_released:
56 return self.arvfile.writeto(off, buf, num_retries)
62 return self.arvfile.writable()
65 with llfuse.lock_released:
67 self.arvfile.parent.root_collection().save()
70 class StringFile(File):
71 """Wrap a simple string as a file"""
72 def __init__(self, parent_inode, contents, _mtime):
73 super(StringFile, self).__init__(parent_inode, _mtime)
74 self.contents = contents
77 return len(self.contents)
79 def readfrom(self, off, size, num_retries=0):
80 return self.contents[off:(off+size)]
83 class ObjectFile(StringFile):
84 """Wrap a dict as a serialized json object."""
86 def __init__(self, parent_inode, obj):
87 super(ObjectFile, self).__init__(parent_inode, "", 0)
88 self.object_uuid = obj['uuid']
92 return self.object_uuid
94 def update(self, obj=None):
95 self._mtime = convertTime(obj['modified_at']) if 'modified_at' in obj else 0
96 self.contents = json.dumps(obj, indent=4, sort_keys=True) + "\n"