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Levin Zimmermann
neoppod
Commits
f9f4b93d
Commit
f9f4b93d
authored
Dec 26, 2018
by
Kirill Smelkov
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parent
a4be5d2f
Changes
4
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4 changed files
with
20 additions
and
18 deletions
+20
-18
go/zodb/open.go
go/zodb/open.go
+13
-11
go/zodb/storage/fs1/filestorage.go
go/zodb/storage/fs1/filestorage.go
+2
-2
go/zodb/storage/fs1/filestorage_test.go
go/zodb/storage/fs1/filestorage_test.go
+1
-1
go/zodb/zodb.go
go/zodb/zodb.go
+4
-4
No files found.
go/zodb/open.go
View file @
f9f4b93d
...
...
@@ -46,7 +46,7 @@ type DriverOptions struct {
// it can get out of sync with the on-disk database file.
//
// The storage driver closes !nil Watchq when the driver is closed.
Watchq
chan
<-
Watch
Event
Watchq
chan
<-
Commit
Event
}
// DriverOpener is a function to open a storage driver.
...
...
@@ -91,7 +91,7 @@ func OpenStorage(ctx context.Context, storageURL string, opt *OpenOptions) (ISto
return
nil
,
fmt
.
Errorf
(
"zodb: URL scheme
\"
%s://
\"
not supported"
,
u
.
Scheme
)
}
drvWatchq
:=
make
(
chan
Watch
Event
)
drvWatchq
:=
make
(
chan
Commit
Event
)
drvOpt
:=
&
DriverOptions
{
ReadOnly
:
opt
.
ReadOnly
,
Watchq
:
drvWatchq
,
...
...
@@ -115,7 +115,7 @@ func OpenStorage(ctx context.Context, storageURL string, opt *OpenOptions) (ISto
drvWatchq
:
drvWatchq
,
watchReq
:
make
(
chan
watchRequest
),
watchTab
:
make
(
map
[
chan
Watch
Event
]
struct
{}),
watchTab
:
make
(
map
[
chan
Commit
Event
]
struct
{}),
},
nil
}
...
...
@@ -131,9 +131,9 @@ type storage struct {
l1cache
*
Cache
// can be =nil, if opened with NoCache
// watcher
drvWatchq
chan
Watch
Event
// watchq passed to driver
watchReq
chan
watchRequest
// {Add,Del}Watch requests go here
watchTab
map
[
chan
Watch
Event
]
struct
{}
// registered watchers
drvWatchq
chan
Commit
Event
// watchq passed to driver
watchReq
chan
watchRequest
// {Add,Del}Watch requests go here
watchTab
map
[
chan
Commit
Event
]
struct
{}
// registered watchers
}
// loading goes through cache - this way prefetching can work
...
...
@@ -162,9 +162,9 @@ func (s *storage) Prefetch(ctx context.Context, xid Xid) {
// watchRequest represents request to add/del a watch.
type
watchRequest
struct
{
op
watchOp
// add or del
ack
chan
struct
{}
// when request processed
watchq
chan
Watch
Event
// {Add,Del}Watch argument
op
watchOp
// add or del
ack
chan
struct
{}
// when request processed
watchq
chan
Commit
Event
// {Add,Del}Watch argument
}
type
watchOp
int
...
...
@@ -204,14 +204,16 @@ func (s *storage) watcher() {
}
}
func
(
s
*
storage
)
AddWatch
(
watchq
chan
WatchEvent
)
{
// AddWatch implements Watcher.
func
(
s
*
storage
)
AddWatch
(
watchq
chan
CommitEvent
)
{
// XXX when already Closed?
ack
:=
make
(
chan
struct
{})
s
.
watchReq
<-
watchRequest
{
addWatch
,
ack
,
watchq
}
<-
ack
}
func
(
s
*
storage
)
DelWatch
(
watchq
chan
WatchEvent
)
{
// DelWatch implements Watcher.
func
(
s
*
storage
)
DelWatch
(
watchq
chan
CommitEvent
)
{
// XXX when already Closed?
ack
:=
make
(
chan
struct
{})
s
.
watchReq
<-
watchRequest
{
delWatch
,
ack
,
watchq
}
...
...
go/zodb/storage/fs1/filestorage.go
View file @
f9f4b93d
...
...
@@ -99,7 +99,7 @@ type FileStorage struct {
downErr
error
// !nil when the storage is no longer operational
// driver client <- watcher: database commits.
watchq
chan
<-
zodb
.
Watch
Event
watchq
chan
<-
zodb
.
Commit
Event
down
chan
struct
{}
// ready when storage is no longer operational
downOnce
sync
.
Once
// shutdown may be due to both Close and IO error in watcher
...
...
@@ -668,7 +668,7 @@ mainloop:
case
<-
fs
.
down
:
return
nil
case
fs
.
watchq
<-
zodb
.
Watch
Event
{
it
.
Txnh
.
Tid
,
oidv
}
:
case
fs
.
watchq
<-
zodb
.
Commit
Event
{
it
.
Txnh
.
Tid
,
oidv
}
:
// ok
}
}
...
...
go/zodb/storage/fs1/filestorage_test.go
View file @
f9f4b93d
...
...
@@ -410,7 +410,7 @@ func TestWatch(t *testing.T) {
// force tfs creation & open tfs at go side
at
:=
xcommit
(
0
,
Object
{
0
,
"data0"
})
watchq
:=
make
(
chan
zodb
.
Watch
Event
)
watchq
:=
make
(
chan
zodb
.
Commit
Event
)
fs
:=
xfsopenopt
(
t
,
tfs
,
&
zodb
.
DriverOptions
{
ReadOnly
:
true
,
Watchq
:
watchq
})
ctx
:=
context
.
Background
()
...
...
go/zodb/zodb.go
View file @
f9f4b93d
...
...
@@ -429,8 +429,8 @@ type Committer interface {
}
//
WatchEvent is one event describing observed database change
.
type
Watch
Event
struct
{
//
CommitEvent is event describing one observed database commit
.
type
Commit
Event
struct
{
Tid
Tid
Changev
[]
Oid
// XXX name
}
...
...
@@ -447,14 +447,14 @@ type Watcher interface {
// Once registered, watchq must be read. Not doing so will stuck whole storage.
//
// Multiple AddWatch calls with the same watchq register watchq only once.
AddWatch
(
watchq
chan
Watch
Event
)
AddWatch
(
watchq
chan
Commit
Event
)
// DelWatch unregisters watchq to be notified of database changes.
//
// After DelWatch call completes, no new events will be sent to watchq.
//
// DelWatch is noop if watchq was not registered.
DelWatch
(
watchq
chan
Watch
Event
)
DelWatch
(
watchq
chan
Commit
Event
)
}
...
...
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