Skip to content

H
h2database
提交 2184b359 authored 作者: Thomas Mueller's avatar Thomas Mueller
浏览文件
操作

MVTableEngine: concurrency

上级 1d417475
隐藏空白字符变更
内嵌 并排
正在显示 包含 113 行增加 和 100 行删除
h2/src/main/org/h2/mvstore/db/TransactionStore.java
浏览文件 @ 2184b359
......@@ -103,7 +103,7 @@ public class TransactionStore {
init();
}
private void init() {
private synchronized void init() {
String s = settings.get(LAST_TRANSACTION_ID);
if (s != null) {
lastTransactionId = Long.parseLong(s);
......@@ -115,9 +115,11 @@ public class TransactionStore {
DataUtils.ERROR_TRANSACTION_CORRUPT,
"Last transaction not stored");
}
if (undoLog.size() > 0) {
long[] key = undoLog.firstKey();
firstOpenTransaction = key[0];
synchronized (undoLog) {
if (undoLog.size() > 0) {
long[] key = undoLog.firstKey();
firstOpenTransaction = key[0];
}
}
}
......@@ -126,29 +128,31 @@ public class TransactionStore {
*
* @return the list of transactions (sorted by id)
*/
public synchronized List<Transaction> getOpenTransactions() {
ArrayList<Transaction> list = New.arrayList();
long[] key = undoLog.firstKey();
while (key != null) {
long transactionId = key[0];
long[] end = { transactionId, Long.MAX_VALUE };
key = undoLog.floorKey(end);
long logId = key[1] + 1;
Object[] data = preparedTransactions.get(transactionId);
int status;
String name;
if (data == null) {
status = Transaction.STATUS_OPEN;
name = null;
} else {
status = (Integer) data[0];
name = (String) data[1];
public List<Transaction> getOpenTransactions() {
synchronized (undoLog) {
ArrayList<Transaction> list = New.arrayList();
long[] key = undoLog.firstKey();
while (key != null) {
long transactionId = key[0];
long[] end = { transactionId, Long.MAX_VALUE };
key = undoLog.floorKey(end);
long logId = key[1] + 1;
Object[] data = preparedTransactions.get(transactionId);
int status;
String name;
if (data == null) {
status = Transaction.STATUS_OPEN;
name = null;
} else {
status = (Integer) data[0];
name = (String) data[1];
}
Transaction t = new Transaction(this, transactionId, status, name, logId);
list.add(t);
key = undoLog.higherKey(end);
}
Transaction t = new Transaction(this, transactionId, status, name, logId);
list.add(t);
key = undoLog.higherKey(end);
return list;
}
return list;
}
/**
......@@ -187,7 +191,7 @@ public class TransactionStore {
*
* @param t the transaction
*/
void storeTransaction(Transaction t) {
synchronized void storeTransaction(Transaction t) {
if (t.getStatus() == Transaction.STATUS_PREPARED || t.getName() != null) {
Object[] v = { t.getStatus(), t.getName() };
preparedTransactions.put(t.getId(), v);
......@@ -209,7 +213,9 @@ public class TransactionStore {
commitIfNeeded();
long[] undoKey = { t.getId(), logId };
Object[] log = new Object[] { opType, mapId, key, oldValue };
undoLog.put(undoKey, log);
synchronized (undoLog) {
undoLog.put(undoKey, log);
}
if (firstOpenTransaction == -1 || t.getId() < firstOpenTransaction) {
firstOpenTransaction = t.getId();
}
......@@ -225,31 +231,33 @@ public class TransactionStore {
if (store.isClosed()) {
return;
}
for (long logId = 0; logId < maxLogId; logId++) {
commitIfNeeded();
long[] undoKey = new long[] { t.getId(), logId };
Object[] op = undoLog.get(undoKey);
int opType = (Integer) op[0];
if (opType == Transaction.OP_REMOVE) {
int mapId = (Integer) op[1];
MVMap<Object, VersionedValue> map = openMap(mapId);
Object key = op[2];
VersionedValue value = map.get(key);
// possibly the entry was added later on
// so we have to check
if (value == null) {
// nothing to do
} else if (value.value == null) {
// remove the value
map.remove(key);
synchronized (undoLog) {
for (long logId = 0; logId < maxLogId; logId++) {
commitIfNeeded();
long[] undoKey = new long[] { t.getId(), logId };
Object[] op = undoLog.get(undoKey);
int opType = (Integer) op[0];
if (opType == Transaction.OP_REMOVE) {
int mapId = (Integer) op[1];
MVMap<Object, VersionedValue> map = openMap(mapId);
Object key = op[2];
VersionedValue value = map.get(key);
// possibly the entry was added later on
// so we have to check
if (value == null) {
// nothing to do
} else if (value.value == null) {
// remove the value
map.remove(key);
}
}
undoLog.remove(undoKey);
}
undoLog.remove(undoKey);
}
endTransaction(t);
}
private MVMap<Object, VersionedValue> openMap(int mapId) {
private synchronized MVMap<Object, VersionedValue> openMap(int mapId) {
// TODO open map by id if possible
Map<String, String> meta = store.getMetaMap();
String m = meta.get("map." + mapId);
......@@ -277,23 +285,25 @@ public class TransactionStore {
if (transactionId < firstOpenTransaction) {
return false;
}
if (firstOpenTransaction == -1) {
if (undoLog.size() == 0) {
return false;
synchronized (undoLog) {
if (firstOpenTransaction == -1) {
if (undoLog.size() == 0) {
return false;
}
long[] key = undoLog.firstKey();
if (key == null) {
// unusual, but can happen
return false;
}
firstOpenTransaction = key[0];
}
long[] key = undoLog.firstKey();
if (key == null) {
// unusual, but can happen
return false;
if (firstOpenTransaction == transactionId) {
return true;
}
firstOpenTransaction = key[0];
}
if (firstOpenTransaction == transactionId) {
return true;
long[] key = { transactionId, -1 };
key = undoLog.higherKey(key);
return key != null && key[0] == transactionId;
}
long[] key = { transactionId, -1 };
key = undoLog.higherKey(key);
return key != null && key[0] == transactionId;
}
/**
......@@ -301,7 +311,7 @@ public class TransactionStore {
*
* @param t the transaction
*/
void endTransaction(Transaction t) {
synchronized void endTransaction(Transaction t) {
if (t.getStatus() == Transaction.STATUS_PREPARED) {
preparedTransactions.remove(t.getId());
}
......@@ -322,24 +332,26 @@ public class TransactionStore {
* @param toLogId the log id to roll back to
*/
void rollbackTo(Transaction t, long maxLogId, long toLogId) {
for (long logId = maxLogId - 1; logId >= toLogId; logId--) {
commitIfNeeded();
long[] undoKey = new long[] { t.getId(), logId };
Object[] op = undoLog.get(undoKey);
int mapId = ((Integer) op[1]).intValue();
MVMap<Object, VersionedValue> map = openMap(mapId);
if (map != null) {
Object key = op[2];
VersionedValue oldValue = (VersionedValue) op[3];
if (oldValue == null) {
// this transaction added the value
map.remove(key);
} else {
// this transaction updated the value
map.put(key, oldValue);
synchronized (undoLog) {
for (long logId = maxLogId - 1; logId >= toLogId; logId--) {
commitIfNeeded();
long[] undoKey = new long[] { t.getId(), logId };
Object[] op = undoLog.get(undoKey);
int mapId = ((Integer) op[1]).intValue();
MVMap<Object, VersionedValue> map = openMap(mapId);
if (map != null) {
Object key = op[2];
VersionedValue oldValue = (VersionedValue) op[3];
if (oldValue == null) {
// this transaction added the value
map.remove(key);
} else {
// this transaction updated the value
map.put(key, oldValue);
}
}
undoLog.remove(undoKey);
}
undoLog.remove(undoKey);
}
}
......@@ -363,23 +375,25 @@ public class TransactionStore {
}
private void fetchNext() {
while (logId >= toLogId) {
Object[] op = undoLog.get(new long[] {
t.getId(), logId });
int mapId = ((Integer) op[1]).intValue();
// TODO open map by id if possible
Map<String, String> meta = store.getMetaMap();
String m = meta.get("map." + mapId);
logId--;
if (m == null) {
// map was removed later on
} else {
current = new Change();
current.mapName = DataUtils.parseMap(m).get("name");
current.key = op[2];
VersionedValue oldValue = (VersionedValue) op[3];
current.value = oldValue == null ? null : oldValue.value;
return;
synchronized (undoLog) {
while (logId >= toLogId) {
Object[] op = undoLog.get(new long[] {
t.getId(), logId });
int mapId = ((Integer) op[1]).intValue();
// TODO open map by id if possible
Map<String, String> meta = store.getMetaMap();
String m = meta.get("map." + mapId);
logId--;
if (m == null) {
// map was removed later on
} else {
current = new Change();
current.mapName = DataUtils.parseMap(m).get("name");
current.key = op[2];
VersionedValue oldValue = (VersionedValue) op[3];
current.value = oldValue == null ? null : oldValue.value;
return;
}
}
}
current = null;
......@@ -958,8 +972,10 @@ public class TransactionStore {
}
// get the value before the uncommitted transaction
long[] x = new long[] { tx, logId };
Object[] d = transaction.store.undoLog.get(x);
data = (VersionedValue) d[3];
synchronized (transaction.store.undoLog) {
Object[] d = transaction.store.undoLog.get(x);
data = (VersionedValue) d[3];
}
}
}
......
h2/src/test/org/h2/test/TestAll.java
浏览文件 @ 2184b359
......@@ -680,10 +680,7 @@ kill -9 `jps -l | grep "org.h2.test." | cut -d " " -f 1`
new TestRandomCompare().runTest(this);
new TestKillRestart().runTest(this);
new TestKillRestartMulti().runTest(this);
if (!mvStore) {
// concurrent modification of the undoLog
new TestMultiThreaded().runTest(this);
}
new TestMultiThreaded().runTest(this);
new TestOuterJoins().runTest(this);
new TestNestedJoins().runTest(this);
......
Markdown 格式
0% 或
您添加了 0 人 到此讨论。请谨慎行事。
请先完成此评论的编辑！
请 注册 或者 后发表评论