@Override
public ISchematicCursor getCursor(
ExecutionContext executionContext, IndexMeta indexMeta, String actualTableName)
throws TddlException {
Database db = getDatabase(actualTableName);
if (db == null) {
throw new TddlException("table don't contains indexName:" + actualTableName);
}
ITransaction txn = executionContext.getTransaction();
CursorConfig cc = CursorConfig.DEFAULT;
LockMode lm = LockMode.DEFAULT;
if (txn != null) {
com.sleepycat.je.TransactionConfig _config = ((JE_Transaction) txn).config;
if (_config.getReadUncommitted()) {
cc = CursorConfig.READ_UNCOMMITTED;
lm = LockMode.READ_UNCOMMITTED;
} else if (_config.getReadCommitted()) {
cc = CursorConfig.READ_COMMITTED;
// lm = LockMode.READ_COMMITTED;
}
} else {
cc = CursorConfig.READ_COMMITTED;
}
JE_Cursor je_cursor =
new JE_Cursor(
indexMeta, db.openCursor(txn == null ? null : ((JE_Transaction) txn).txn, cc), lm);
if (txn != null) {
((JE_Transaction) txn).addCursor(je_cursor);
}
return new SchematicCursor(
je_cursor, je_cursor.getiCursorMeta(), ExecUtils.getOrderBy(indexMeta));
}
/** Write data into the database. */
private void generateData(
Environment master, int numTxns, Durability durability, boolean doCommit) {
/* Write some data. */
DatabaseEntry key = new DatabaseEntry();
byte[] dataPadding = new byte[1000];
DatabaseEntry data = new DatabaseEntry(dataPadding);
TransactionConfig txnConfig = new TransactionConfig();
txnConfig.setDurability(durability);
for (int i = 0; i < numTxns; i++) {
final Transaction txn = master.beginTransaction(null, txnConfig);
// long keyPrefix = i << 10;
// LongBinding.longToEntry(keyPrefix + i, key);
LongBinding.longToEntry(i, key);
db.put(txn, key, data);
if (doCommit) {
txn.commit();
} else {
txn.abort();
}
}
}
private void openEnvironment(File file) throws DatabaseInitException {
EnvironmentConfig envConfig = new EnvironmentConfig();
envConfig.setCachePercent(30);
envConfig.setAllowCreate(true);
envConfig.setTransactional(true);
envConfig.setTxnTimeout(10, TimeUnit.SECONDS);
envConfig.setLockTimeout(2000, TimeUnit.MILLISECONDS);
try {
environment = new Environment(file, envConfig);
transactionConfig = new TransactionConfig();
transactionConfig.setReadCommitted(true);
cursorConfig = new CursorConfig();
cursorConfig.setReadCommitted(true);
} catch (EnvironmentLockedException e) {
String message =
"Environment locked exception. Another process is using the same database, or the current user has no write access (database location: \""
+ file.getAbsolutePath()
+ "\")";
throw new DatabaseInitException(message);
} catch (DatabaseException e) {
String message = "A database initialisation error has occured (" + e.getMessage() + ")";
throw new DatabaseInitException(message);
}
}
protected BerkeleyDBTransaction(
BerkeleyDBPersistenceManager persistenceManager, TransactionConfig config, long timeOut) {
super(persistenceManager);
try {
this.dbTransaction = persistenceManager.getEnvironment().beginTransaction(null, config);
persistenceManager.registerTransaction(this);
this.dbTransaction.setLockTimeout(timeOut, TimeUnit.MILLISECONDS);
this.defaultCursorConfig = new CursorConfig();
this.defaultCursorConfig.setReadCommitted(config.getReadCommitted());
this.defaultCursorConfig.setReadUncommitted(config.getReadUncommitted());
this.timeOut = timeOut;
this.openedCursors =
Collections.synchronizedMap(new HashMap<EntityCursor<?>, List<StackTraceElement>>());
} catch (DatabaseException e) {
throw getPersistenceManager().convertDatabaseException(e);
}
}
/** Used when creating ReplayTxns at recovery. No ActiveTxns map is available. */
public ReplayTxn(EnvironmentImpl envImpl, TransactionConfig config, long txnId, Logger logger)
throws DatabaseException {
super(
envImpl, config, null, // ReplicationContext set later
txnId); // mandatedId
/* Preempt reader transactions when a lock conflict occurs. */
setImportunate(true);
this.logger = logger;
assert !config.getLocalWrite();
}
public ISchematicCursor getCursor(
ITransaction txn, IndexMeta indexMeta, String isolation, String actualTableName)
throws TddlException {
Database db = getDatabase(actualTableName);
if (db == null) {
throw new TddlException("table don't contains indexName:" + actualTableName);
}
CursorConfig cc = CursorConfig.DEFAULT;
LockMode lm = LockMode.DEFAULT;
if (txn != null) {
com.sleepycat.je.TransactionConfig _config = ((JE_Transaction) txn).config;
if (_config.getReadUncommitted()) {
cc = CursorConfig.READ_UNCOMMITTED;
lm = LockMode.READ_UNCOMMITTED;
} else if (_config.getReadCommitted()) {
cc = CursorConfig.READ_COMMITTED;
// lm = LockMode.READ_COMMITTED;
}
} else {
if (Isolation.READ_COMMITTED.equals(isolation)) {
cc = CursorConfig.READ_COMMITTED;
// lm = LockMode.READ_COMMITTED;//not support
} else if (Isolation.READ_UNCOMMITTED.equals(isolation)) {
cc = CursorConfig.READ_UNCOMMITTED;
lm = LockMode.READ_UNCOMMITTED;
} else if (Isolation.REPEATABLE_READ.equals(isolation)) {
// default
} else if (Isolation.SERIALIZABLE.equals(isolation)) {
// txn_config
}
}
JE_Cursor je_cursor =
new JE_Cursor(
indexMeta, db.openCursor(txn == null ? null : ((JE_Transaction) txn).txn, cc), lm);
if (txn != null) {
((JE_Transaction) txn).addCursor(je_cursor);
}
return new SchematicCursor(
je_cursor, je_cursor.getiCursorMeta(), ExecUtils.getOrderBy(indexMeta));
}
