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Kirill Smelkov
neo
Commits
5bb19440
Commit
5bb19440
authored
May 02, 2017
by
Kirill Smelkov
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X draftly finished catobj
parent
2055fb37
Changes
5
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5 changed files
with
69 additions
and
18 deletions
+69
-18
go/neo/client.go
go/neo/client.go
+1
-1
go/zodb/storage/fs1/filestorage.go
go/zodb/storage/fs1/filestorage.go
+13
-5
go/zodb/zodb.go
go/zodb/zodb.go
+3
-0
go/zodb/zodbtools/catobj.go
go/zodb/zodbtools/catobj.go
+42
-7
go/zodb/zodbtools/help.go
go/zodb/zodbtools/help.go
+10
-5
No files found.
go/neo/client.go
View file @
5bb19440
...
...
@@ -70,7 +70,7 @@ func (c *Client) LastTid() (zodb.Tid, error) {
}
func
(
c
*
Client
)
Load
(
xid
zodb
.
Xid
)
(
data
[]
byte
,
tid
zodb
.
Tid
,
err
error
)
{
panic
(
"TODO"
)
panic
(
"TODO"
)
// XXX
}
func
(
c
*
Client
)
Iterate
(
tidMin
,
tidMax
zodb
.
Tid
)
zodb
.
IStorageIterator
{
...
...
go/zodb/storage/fs1/filestorage.go
View file @
5bb19440
...
...
@@ -637,6 +637,7 @@ func (dh *DataHeader) loadNext(r io.ReaderAt /* *os.File */, txnh *TxnHeader) er
// LoadData loads data for the data record taking backpointers into account
// Data is loaded into *buf, which, if needed, is reallocated to hold all loading data size XXX
// NOTE on success dh state is changed to data header of original data transaction
// NOTE "deleted" records are indicated via returning *buf=nil
// TODO buf -> slab
func
(
dh
*
DataHeader
)
LoadData
(
r
io
.
ReaderAt
/* *os.File */
,
buf
*
[]
byte
)
error
{
// scan via backpointers
...
...
@@ -737,10 +738,10 @@ func (fs *FileStorage) Load(xid zodb.Xid) (data []byte, tid zodb.Tid, err error)
// lookup in index position of oid data record within latest transaction who changed this oid
dataPos
,
ok
:=
fs
.
index
.
Get
(
xid
.
Oid
)
if
!
ok
{
// XXX drop oid from ErrOidMissing ?
return
nil
,
zodb
.
Tid
(
0
),
&
ErrXidLoad
{
xid
,
zodb
.
ErrOidMissing
{
Oid
:
xid
.
Oid
}}
return
nil
,
zodb
.
Tid
(
0
),
&
zodb
.
ErrOidMissing
{
Oid
:
xid
.
Oid
}
}
// FIXME zodb.TidMax is only 7fff... tid from outside can be ffff...
dh
:=
DataHeader
{
Oid
:
xid
.
Oid
,
Tid
:
zodb
.
TidMax
,
PrevRevPos
:
dataPos
}
tidBefore
:=
xid
.
XTid
.
Tid
if
!
xid
.
XTid
.
TidBefore
{
...
...
@@ -754,15 +755,17 @@ func (fs *FileStorage) Load(xid zodb.Xid) (data []byte, tid zodb.Tid, err error)
if
err
==
io
.
EOF
{
// no such oid revision
err
=
&
zodb
.
ErrXidMissing
{
Xid
:
xid
}
}
else
{
err
=
&
ErrXidLoad
{
xid
,
err
}
}
return
nil
,
zodb
.
Tid
(
0
),
&
ErrXidLoad
{
xid
,
err
}
return
nil
,
zodb
.
Tid
(
0
),
err
}
}
// found dh.Tid < tidBefore; check it really satisfies xid.XTid
if
!
xid
.
XTid
.
TidBefore
&&
dh
.
Tid
!=
xid
.
XTid
.
Tid
{
// XXX unify with ^^^
return
nil
,
zodb
.
Tid
(
0
),
&
ErrXidLoad
{
xid
,
&
zodb
.
ErrXidMissing
{
Xid
:
xid
}}
return
nil
,
zodb
.
Tid
(
0
),
&
zodb
.
ErrXidMissing
{
Xid
:
xid
}
}
// even if we will scan back via backpointers, the tid returned should
...
...
@@ -774,6 +777,11 @@ func (fs *FileStorage) Load(xid zodb.Xid) (data []byte, tid zodb.Tid, err error)
if
err
!=
nil
{
return
nil
,
zodb
.
Tid
(
0
),
&
ErrXidLoad
{
xid
,
err
}
}
if
data
==
nil
{
// data was deleted
// XXX or allow this and return via data=nil ?
return
nil
,
zodb
.
Tid
(
0
),
&
zodb
.
ErrXidMissing
{
Xid
:
xid
}
}
return
data
,
tid
,
nil
}
...
...
go/zodb/zodb.go
View file @
5bb19440
...
...
@@ -62,6 +62,8 @@ func (tid Tid) Valid() bool {
// ----------------------------------------
// ErrOidMissing is an error which tells that there is no such oid in the database at all
// XXX do we need distinction in between ErrOidMissing & ErrXidMissing ?
// (think how client should handle error from Load ?)
type
ErrOidMissing
struct
{
Oid
Oid
}
...
...
@@ -140,6 +142,7 @@ type IStorage interface {
// LoadSerial and LoadBefore generalized into 1 Load (see Xid for details)
// TODO data []byte -> something allocated from slab ?
// XXX currently deleted data is returned as data=nil -- is it ok?
Load
(
xid
Xid
)
(
data
[]
byte
,
tid
Tid
,
err
error
)
// XXX -> StorageRecordInformation ?
// -> Prefetch(xid Xid) ...
...
...
go/zodb/zodbtools/catobj.go
View file @
5bb19440
...
...
@@ -28,8 +28,21 @@ import (
"../../zodb"
)
// Catobj dumps content of one ZODB object XXX text
// Catobj dumps content of one ZODB object
// The object is printed in raw form without any headers (see Dumpobj)
func
Catobj
(
w
io
.
Writer
,
stor
zodb
.
IStorage
,
xid
zodb
.
Xid
)
error
{
data
,
_
,
err
:=
stor
.
Load
(
xid
)
if
err
!=
nil
{
return
err
}
_
,
err
=
w
.
Write
(
data
)
// NOTE delted data are returned as err by Load
return
err
// XXX err ctx ?
}
// Dumpobj dumps content of one ZODB object with zodbdump-like header
func
Dumpobj
(
w
io
.
Writer
,
stor
zodb
.
IStorage
,
xid
zodb
.
Xid
,
hashOnly
bool
)
error
{
var
objInfo
zodb
.
StorageRecordInformation
data
,
tid
,
err
:=
stor
.
Load
(
xid
)
...
...
@@ -37,13 +50,13 @@ func Catobj(w io.Writer, stor zodb.IStorage, xid zodb.Xid) error {
return
err
}
// XXX hack - rework IStorage.Load to fill-in objInfo directly
// XXX hack -
TODO
rework IStorage.Load to fill-in objInfo directly
objInfo
.
Oid
=
xid
.
Oid
objInfo
.
Tid
=
tid
objInfo
.
Data
=
data
objInfo
.
DataTid
=
tid
// XXX wrong
objInfo
.
DataTid
=
tid
// XXX
generally
wrong
d
:=
dumper
{
W
:
w
}
// XXX HashOnly + raw dump
d
:=
dumper
{
W
:
w
,
HashOnly
:
hashOnly
}
err
=
d
.
DumpData
(
&
objInfo
)
return
err
}
...
...
@@ -62,14 +75,20 @@ xid is object address (see 'zodb help xid').
Options:
-h --help this help text.
// -hashonly dump only hashes of objects without content. XXX
-hashonly dump only hashes of objects without content.
-raw dump object data without any headers. Only one object allowed.
`
)
}
func
catobjMain
(
argv
[]
string
)
{
hashOnly
:=
false
raw
:=
false
flags
:=
flag
.
FlagSet
{
Usage
:
func
()
{
catobjUsage
(
os
.
Stderr
)
}}
flags
.
Init
(
""
,
flag
.
ExitOnError
)
// flags.BoolVar(&hashOnly, "hashonly", hashOnly, "dump only hashes of objects")
flags
.
BoolVar
(
&
hashOnly
,
"hashonly"
,
hashOnly
,
"dump only hashes of objects"
)
flags
.
BoolVar
(
&
raw
,
"raw"
,
hashOnly
,
"dump object data without any headers. Only one object allowed."
)
// TODO also -batch to serve objects a-la `git cat-file --batch` ?
flags
.
Parse
(
argv
[
1
:
])
argv
=
flags
.
Args
()
...
...
@@ -79,6 +98,10 @@ func catobjMain(argv []string) {
}
storUrl
:=
argv
[
0
]
if
hashOnly
&&
raw
{
log
.
Fatal
(
"-hashonly & -raw are incompatible"
)
}
xidv
:=
[]
zodb
.
Xid
{}
for
_
,
arg
:=
range
argv
[
1
:
]
{
xid
,
err
:=
zodb
.
ParseXid
(
arg
)
...
...
@@ -89,14 +112,26 @@ func catobjMain(argv []string) {
xidv
=
append
(
xidv
,
xid
)
}
if
raw
&&
len
(
xidv
)
>
1
{
log
.
Fatal
(
"only 1 object allowed with -raw"
)
}
stor
,
err
:=
zodb
.
OpenStorageURL
(
storUrl
)
// TODO read-only
if
err
!=
nil
{
log
.
Fatal
(
err
)
}
// TODO defer stor.Close()
catobj
:=
func
(
xid
zodb
.
Xid
)
error
{
if
raw
{
return
Catobj
(
os
.
Stdout
,
stor
,
xid
)
}
else
{
return
Dumpobj
(
os
.
Stdout
,
stor
,
xid
,
hashOnly
)
}
}
for
_
,
xid
:=
range
xidv
{
err
=
Catobj
(
os
.
Stdout
,
stor
,
xid
)
err
=
catobj
(
xid
)
if
err
!=
nil
{
log
.
Fatal
(
err
)
}
...
...
go/zodb/zodbtools/help.go
View file @
5bb19440
...
...
@@ -66,11 +66,16 @@ Please see zodburi documentation for full details:
http://docs.pylonsproject.org/projects/zodburi/
`
var
HelpTopics
=
HelpRegistry
{
{
"zurl"
,
"specifying database URL"
,
helpZURL
},
}
const
helpXid
=
`TODO describe
// TODO xid
=tid:oid
<tid:oid
`
// TODO dump format
var
HelpTopics
=
HelpRegistry
{
{
"zurl"
,
"specifying database URL"
,
helpZURL
},
{
"xid"
,
"specifying object address"
,
helpXid
},
}
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