import os, sys, tempfile
import boto
+from boto.exception import S3ResponseError
from boto.s3.bucket import Bucket
from boto.s3.key import Key
import cumulus.store
+def throw_notfound(method):
+ """Decorator to convert a 404 error into a cumulus.store.NoutFoundError."""
+ def f(*args, **kwargs):
+ try:
+ return method(*args, **kwargs)
+ except S3ResponseError as e:
+ if e.status == 404:
+ print "Got a 404:", e
+ raise cumulus.store.NotFoundError(e)
+ else:
+ raise
+ return f
+
class S3Store(cumulus.store.Store):
def __init__(self, url, **kw):
# Old versions of the Python urlparse library will take a URL like
self.prefix = prefix.strip("/")
self.scan_cache = {}
- def _get_key(self, type, name):
+ def _get_key(self, path):
k = Key(self.bucket)
- k.key = "%s/%s/%s" % (self.prefix, type, name)
+ k.key = "%s/%s" % (self.prefix, path)
return k
- def scan(self):
- prefix = "%s/" % (self.prefix,)
+ @throw_notfound
+ def scan(self, path):
+ prefix = "%s/%s/" % (self.prefix, path)
for i in self.bucket.list(prefix):
assert i.key.startswith(prefix)
self.scan_cache[i.key] = i
- def list(self, type):
- prefix = "%s/%s/" % (self.prefix, type)
+ @throw_notfound
+ def list(self, path):
+ prefix = "%s/%s/" % (self.prefix, path)
for i in self.bucket.list(prefix):
assert i.key.startswith(prefix)
yield i.key[len(prefix):]
- def get(self, type, name):
+ @throw_notfound
+ def get(self, path):
fp = tempfile.TemporaryFile()
- k = self._get_key(type, name)
+ k = self._get_key(path)
k.get_file(fp)
fp.seek(0)
return fp
- def put(self, type, name, fp):
- k = self._get_key(type, name)
+ @throw_notfound
+ def put(self, path, fp):
+ k = self._get_key(path)
k.set_contents_from_file(fp)
- def delete(self, type, name):
- self.bucket.delete_key("%s/%s/%s" % (self.prefix, type, name))
+ @throw_notfound
+ def delete(self, path):
+ self.bucket.delete_key("%s/%s" % (self.prefix, path))
- def stat(self, type, name):
- path = "%s/%s/%s" % (self.prefix, type, name)
+ def stat(self, path):
+ path = "%s/%s" % (self.prefix, path)
if path in self.scan_cache:
k = self.scan_cache[path]
else: