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Kirill Smelkov
wendelin.core
Commits
db65b87d
Commit
db65b87d
authored
Jul 19, 2018
by
Kirill Smelkov
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parent
6c37f3b3
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25 additions
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10 deletions
+25
-10
wcfs/btree.go
wcfs/btree.go
+25
-10
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wcfs/btree.go
View file @
db65b87d
...
...
@@ -18,6 +18,7 @@ import (
"context"
"sort"
"lab.nexedi.com/kirr/go123/xerr"
//"lab.nexedi.com/kirr/neo/go/zodb"
pickle
"github.com/kisielk/og-rek"
)
...
...
@@ -73,9 +74,12 @@ type ZBTree struct {
// Get searches BTree by key.
//
// It loads intermediate BTree nodes from database on demand as needed.
// XXX ok -> ErrKeyNotFound?
func
(
t
*
ZBTree
)
Get
(
ctx
context
.
Context
,
key
KEY
)
(
interface
{},
bool
,
error
)
{
t
.
PActivate
(
ctx
)
// XXX err
func
(
t
*
ZBTree
)
Get
(
ctx
context
.
Context
,
key
KEY
)
(
_
interface
{},
_
bool
,
err
error
)
{
defer
xerr
.
Contextf
(
&
err
,
"btree(%s): get %s"
)
// XXX + url?
err
=
t
.
PActivate
(
ctx
)
if
err
!=
nil
{
return
nil
,
false
,
err
}
if
len
(
t
.
data
)
==
0
{
// empty btree
...
...
@@ -97,24 +101,35 @@ func (t *ZBTree) Get(ctx context.Context, key KEY) (interface{}, bool, error) {
case
*
ZBTree
:
t
.
PDeactivate
()
t
=
child
t
.
PActivate
(
ctx
)
// XXX err
err
=
t
.
PActivate
(
ctx
)
if
err
!=
nil
{
return
nil
,
false
,
err
}
case
*
ZBucket
:
t
.
PDeactivate
()
child
.
PActivate
(
ctx
)
// XXX err
v
,
ok
:=
child
.
get
(
key
)
child
.
PDeactivate
()
return
v
,
ok
,
nil
return
child
.
Get
(
ctx
,
key
)
}
}
}
// Get searches Bucket by key.
func
(
b
*
ZBucket
)
Get
(
ctx
context
.
Context
,
key
KEY
)
(
_
interface
{},
_
bool
,
err
error
)
{
defer
xerr
.
Contextf
(
&
err
,
"bucket(%s): get %s"
)
// XXX + url?
err
=
b
.
PActivate
(
ctx
)
if
err
!=
nil
{
return
nil
,
false
,
err
}
v
,
ok
:=
b
.
get
(
key
)
b
.
PDeactivate
()
return
v
,
ok
,
nil
}
// get searches Bucket by key.
//
// no loading from database is done. The bucket must be already activated.
func
(
b
*
ZBucket
)
get
(
key
KEY
)
(
interface
{},
bool
)
{
// XXX b.PActivate ? XXX better caller? (or inside if get -> Get)
// search i: K(i-1) < k ≤ K(i) ; K(-1) = -∞, K(len) = +∞
i
:=
sort
.
Search
(
len
(
b
.
keys
),
func
(
i
int
)
bool
{
return
key
<=
b
.
keys
[
i
]
...
...
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