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Kirill Smelkov
neo
Commits
a2dea432
Commit
a2dea432
authored
Aug 08, 2018
by
Kirill Smelkov
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.
parent
4467ebea
Changes
2
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2 changed files
with
27 additions
and
3 deletions
+27
-3
go/zodb/db.go
go/zodb/db.go
+26
-3
go/zodb/zodb.go
go/zodb/zodb.go
+1
-0
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go/zodb/db.go
View file @
a2dea432
...
...
@@ -20,8 +20,11 @@
package
zodb
// application-level database handle.
// TODO: handle invalidations
import
(
"context"
"fmt"
"sort"
"sync"
"time"
...
...
@@ -81,8 +84,27 @@ type ConnOptions struct {
// Open must be called under transaction.
// Opened connection must be used only under the same transaction and only
// until that transaction is complete.
func
(
db
*
DB
)
Open
(
ctx
context
.
Context
,
opt
*
ConnOptions
)
(
*
Connection
,
error
)
{
// XXX err ctx
func
(
db
*
DB
)
Open
(
ctx
context
.
Context
,
opt
*
ConnOptions
)
(
_
*
Connection
,
err
error
)
{
defer
func
()
{
if
err
==
nil
{
return
}
var
argv
[]
interface
{}
if
opt
.
At
!=
0
{
argv
=
append
(
argv
,
fmt
.
Sprintf
(
"at=%s"
,
opt
.
At
))
}
if
opt
.
NoSync
{
argv
=
append
(
argv
,
"nosync"
)
}
err
=
&
OpError
{
URL
:
db
.
stor
.
URL
(),
Op
:
"open db"
,
Args
:
argv
,
Err
:
err
,
}
}()
txn
:=
transaction
.
Current
(
ctx
)
...
...
@@ -140,6 +162,7 @@ func (db *DB) get(at Tid) *Connection {
// search through window of X previous connections and find out the one
// with minimal distance to get to state @at. If all connections are to
// distant - create connection anew.
//
// XXX search not only previous, but future too? (we can get back to
// past by invalidating what was later changed)
const
X
=
10
// XXX hardcoded
...
...
@@ -168,7 +191,7 @@ func (db *DB) get(at Tid) *Connection {
if
conn
.
db
!=
db
{
panic
(
"DB.get: foreign connection in the pool"
)
}
if
conn
.
txn
!=
nil
)
{
if
conn
.
txn
!=
nil
{
panic
(
"DB.get: live connection in the pool"
)
}
...
...
go/zodb/zodb.go
View file @
a2dea432
...
...
@@ -311,6 +311,7 @@ func (e *OpError) Error() string {
if
e
.
Args
!=
nil
{
s
+=
fmt
.
Sprintf
(
" %s"
,
e
.
Args
)
}
// XXX if e.Err = OpError with the same URL - don't print URL twice.
s
+=
": "
+
e
.
Err
.
Error
()
return
s
}
...
...
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