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h2database
Commits
7b346b46
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7b346b46
authored
1月 20, 2018
作者:
Evgenij Ryazanov
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电子邮件补丁
差异文件
Add ceilingKey() and floorKey() with tests
上级
56a3ab02
隐藏空白字符变更
内嵌
并排
正在显示
2 个修改的文件
包含
77 行增加
和
0 行删除
+77
-0
TransactionStore.java
h2/src/main/org/h2/mvstore/db/TransactionStore.java
+32
-0
TestTransactionStore.java
h2/src/test/org/h2/test/store/TestTransactionStore.java
+45
-0
没有找到文件。
h2/src/main/org/h2/mvstore/db/TransactionStore.java
浏览文件 @
7b346b46
...
...
@@ -1345,6 +1345,22 @@ public class TransactionStore {
return
key
;
}
/**
* Get the smallest key that is larger than or equal to this key,
* or null if no such key exists.
*
* @param key the key (may not be null)
* @return the result
*/
public
K
ceilingKey
(
K
key
)
{
key
=
map
.
ceilingKey
(
key
);
while
(
key
!=
null
&&
get
(
key
)
==
null
)
{
// Use higherKey() for the next attempts, otherwise we'll get an infinite loop
key
=
higherKey
(
key
);
}
return
key
;
}
/**
* Get one of the previous or next keys. There might be no value
* available for the returned key.
...
...
@@ -1362,6 +1378,22 @@ public class TransactionStore {
return
map
.
getKey
(
index
+
offset
);
}
/**
* Get the largest key that is smaller than or equal to this key,
* or null if no such key exists.
*
* @param key the key (may not be null)
* @return the result
*/
public
K
floorKey
(
K
key
)
{
key
=
map
.
floorKey
(
key
);
while
(
key
!=
null
&&
get
(
key
)
==
null
)
{
// Use lowerKey() for the next attempts, otherwise we'll get an infinite loop
key
=
lowerKey
(
key
);
}
return
key
;
}
/**
* Get the largest key that is smaller than the given key, or null if no
* such key exists.
...
...
h2/src/test/org/h2/test/store/TestTransactionStore.java
浏览文件 @
7b346b46
...
...
@@ -19,9 +19,11 @@ import org.h2.mvstore.DataUtils;
import
org.h2.mvstore.MVMap
;
import
org.h2.mvstore.MVStore
;
import
org.h2.mvstore.db.TransactionStore
;
import
org.h2.mvstore.db.ValueDataType
;
import
org.h2.mvstore.db.TransactionStore.Change
;
import
org.h2.mvstore.db.TransactionStore.Transaction
;
import
org.h2.mvstore.db.TransactionStore.TransactionMap
;
import
org.h2.mvstore.type.ObjectDataType
;
import
org.h2.store.fs.FileUtils
;
import
org.h2.test.TestBase
;
import
org.h2.util.New
;
...
...
@@ -44,6 +46,7 @@ public class TestTransactionStore extends TestBase {
@Override
public
void
test
()
throws
Exception
{
FileUtils
.
createDirectories
(
getBaseDir
());
testHCLFKey
();
testConcurrentAddRemove
();
testConcurrentAdd
();
testCountWithOpenTransactions
();
...
...
@@ -62,6 +65,48 @@ public class TestTransactionStore extends TestBase {
testStoreMultiThreadedReads
();
}
private
void
testHCLFKey
()
{
MVStore
s
=
MVStore
.
open
(
null
);
final
TransactionStore
ts
=
new
TransactionStore
(
s
);
ts
.
init
();
Transaction
t
=
ts
.
begin
();
ObjectDataType
keyType
=
new
ObjectDataType
();
TransactionMap
<
Long
,
Long
>
map
=
t
.
openMap
(
"test"
,
keyType
,
keyType
);
map
.
put
(
10L
,
100L
);
map
.
put
(
20L
,
200L
);
map
.
put
(
30L
,
300L
);
map
.
put
(
40L
,
400L
);
t
.
commit
();
t
=
ts
.
begin
();
map
=
t
.
openMap
(
"test"
,
keyType
,
keyType
);
map
.
put
(
15L
,
150L
);
// The same transaction
assertEquals
((
Object
)
15L
,
map
.
higherKey
(
10L
));
t
=
ts
.
begin
();
map
=
t
.
openMap
(
"test"
,
keyType
,
keyType
);
// Another transaction
// higherKey()
assertEquals
((
Object
)
20L
,
map
.
higherKey
(
10L
));
assertEquals
((
Object
)
20L
,
map
.
higherKey
(
15L
));
assertNull
(
map
.
higherKey
(
40L
));
// ceilingKey()
assertEquals
((
Object
)
10L
,
map
.
ceilingKey
(
10L
));
assertEquals
((
Object
)
20L
,
map
.
ceilingKey
(
15L
));
assertEquals
((
Object
)
40L
,
map
.
ceilingKey
(
40L
));
assertNull
(
map
.
higherKey
(
45L
));
// lowerKey()
assertNull
(
map
.
lowerKey
(
10L
));
assertEquals
((
Object
)
10L
,
map
.
lowerKey
(
15L
));
assertEquals
((
Object
)
10L
,
map
.
lowerKey
(
20L
));
assertEquals
((
Object
)
20L
,
map
.
lowerKey
(
25L
));
// floorKey()
assertNull
(
map
.
floorKey
(
5L
));
assertEquals
((
Object
)
10L
,
map
.
floorKey
(
10L
));
assertEquals
((
Object
)
10L
,
map
.
floorKey
(
15L
));
assertEquals
((
Object
)
30L
,
map
.
floorKey
(
35L
));
s
.
close
();
}
private
static
void
testConcurrentAddRemove
()
throws
InterruptedException
{
MVStore
s
=
MVStore
.
open
(
null
);
int
threadCount
=
3
;
...
...
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