/** @throws RunRecoveryException if the underlying environment is invalid */
void checkEnv() throws RunRecoveryException {
EnvironmentImpl env = envHandle.getEnvironmentImpl();
if (env != null) {
env.checkIfInvalid();
}
}
public JoinCursor join__wrappee__base(Cursor[] cursors, JoinConfig config)
throws DatabaseException {
checkEnv();
checkRequiredDbState(OPEN, "Can't call Database.join");
DatabaseUtil.checkForNullParam(cursors, "cursors");
if (cursors.length == 0) {
throw new IllegalArgumentException("At least one cursor is required.");
}
Locker locker = cursors[0].getCursorImpl().getLocker();
if (!locker.isTransactional()) {
EnvironmentImpl env = envHandle.getEnvironmentImpl();
for (int i = 1; i < cursors.length; i += 1) {
Locker locker2 = cursors[i].getCursorImpl().getLocker();
if (locker2.isTransactional()) {
throw new IllegalArgumentException("All cursors must use the same transaction.");
}
EnvironmentImpl env2 = cursors[i].getDatabaseImpl().getDbEnvironment();
if (env != env2) {
throw new IllegalArgumentException("All cursors must use the same environment.");
}
}
locker = null;
} else {
for (int i = 1; i < cursors.length; i += 1) {
Locker locker2 = cursors[i].getCursorImpl().getLocker();
if (locker.getTxnLocker() != locker2.getTxnLocker()) {
throw new IllegalArgumentException("All cursors must use the same transaction.");
}
}
}
return new JoinCursor(locker, this, cursors, config);
}
/**
* Releases a lock acquired by calling acquireTriggerListWriteLock(). If the list is now empty
* then it is set to null, that is, hasTriggers() will subsequently return false.
*/
private void releaseTriggerListWriteLock() throws DatabaseException {
if (triggerList.size() == 0) {
triggerList = null;
}
EnvironmentImpl env = envHandle.getEnvironmentImpl();
env.getTriggerLatch().release();
}
/**
* Gets a write lock on the list of triggers. An empty list is created if necessary, so null is
* never returned. releaseTriggerListWriteLock() must always be called to release the lock.
*/
private void acquireTriggerListWriteLock() throws DatabaseException {
EnvironmentImpl env = envHandle.getEnvironmentImpl();
env.getTriggerLatch().acquireExclusive();
if (triggerList == null) {
triggerList = new ArrayList();
}
}
/**
* @deprecated It has not been possible to implement this method with correct transactional
* semantics without incurring a performance penalty on all Database operations. Truncate
* functionality has been moved to Environment.truncateDatabase(), which requires that all
* Database handles on the database are closed before the truncate operation can execute.
*/
public int truncate(Transaction txn, boolean countRecords) throws DatabaseException {
checkEnv();
checkRequiredDbState(OPEN, "Can't call Database.truncate");
checkWritable("truncate");
Tracer.trace(
Level.FINEST,
envHandle.getEnvironmentImpl(),
"Database.truncate" + ": txnId=" + ((txn == null) ? "null" : Long.toString(txn.getId())));
Locker locker = null;
boolean triggerLock = false;
boolean operationOk = false;
try {
locker =
LockerFactory.getWritableLocker(
envHandle, txn, isTransactional(), true /*retainLocks*/, null);
/*
* Pass true to always get a read lock on the triggers, so we are
* sure that no secondaries are added during truncation.
*/
acquireTriggerListReadLock();
triggerLock = true;
/* Truncate primary. */
int count = truncateInternal(locker, countRecords);
/* Truncate secondaries. */
for (int i = 0; i < triggerList.size(); i += 1) {
Object obj = triggerList.get(i);
if (obj instanceof SecondaryTrigger) {
SecondaryDatabase secDb = ((SecondaryTrigger) obj).getDb();
secDb.truncateInternal(locker, false);
}
}
operationOk = true;
return count;
} finally {
if (locker != null) {
locker.operationEnd(operationOk);
}
if (triggerLock) {
releaseTriggerListReadLock();
}
}
}
public JoinCursor join(Cursor[] cursors, JoinConfig config) throws DatabaseException {
checkEnv();
checkRequiredDbState(OPEN, "Can't call Database.join");
DatabaseUtil.checkForNullParam(cursors, "cursors");
if (cursors.length == 0) {
throw new IllegalArgumentException("At least one cursor is required.");
}
/*
* Check that all cursors use the same locker, if any cursor is
* transactional. And if non-transactional, that all databases are in
* the same environment.
*/
Locker locker = cursors[0].getCursorImpl().getLocker();
if (!locker.isTransactional()) {
EnvironmentImpl env = envHandle.getEnvironmentImpl();
for (int i = 1; i < cursors.length; i += 1) {
Locker locker2 = cursors[i].getCursorImpl().getLocker();
if (locker2.isTransactional()) {
throw new IllegalArgumentException("All cursors must use the same transaction.");
}
EnvironmentImpl env2 = cursors[i].getDatabaseImpl().getDbEnvironment();
if (env != env2) {
throw new IllegalArgumentException("All cursors must use the same environment.");
}
}
locker = null; /* Don't reuse a non-transactional locker. */
} else {
for (int i = 1; i < cursors.length; i += 1) {
Locker locker2 = cursors[i].getCursorImpl().getLocker();
if (locker.getTxnLocker() != locker2.getTxnLocker()) {
throw new IllegalArgumentException("All cursors must use the same transaction.");
}
}
}
/* Create the join cursor. */
return new JoinCursor(locker, this, cursors, config);
}
/**
* Internal unchecked truncate that optionally counts records.
*
* @deprecated
*/
int truncateInternal(Locker locker, boolean countRecords) throws DatabaseException {
if (databaseImpl == null) {
throw new DatabaseException("couldn't find database - truncate");
}
databaseImpl.checkIsDeleted("truncate");
/*
* Truncate must obtain a write lock. In order to do so, it assumes
* ownership for the handle lock and transfers it from this Database
* object to the txn.
*/
if (handleLocker.isHandleLockTransferrable()) {
handleLocker.transferHandleLock(this, locker, false);
}
boolean operationOk = false;
try {
/*
* truncate clones the existing database and returns a new one to
* replace it with. The old databaseImpl object is marked
* 'deleted'.
*/
TruncateResult result = envHandle.getEnvironmentImpl().truncate(locker, databaseImpl);
databaseImpl = result.getDatabase();
operationOk = true;
return countRecords ? result.getRecordCount() : -1;
} finally {
/*
* The txn will know if it's living past the end of this operation,
* and if it needs to transfer the handle lock. operationEnd()
* will be called one level up by the public truncate() method.
*/
locker.setHandleLockOwner(operationOk, this, false);
}
}
/** Releases a lock acquired by calling acquireTriggerListReadLock(). */
private void releaseTriggerListReadLock() throws DatabaseException {
EnvironmentImpl env = envHandle.getEnvironmentImpl();
env.getTriggerLatch().release();
}
/**
* Creates a database but does not open or fully initialize it. Is protected for use in compat
* package.
*/
protected Database(Environment env) {
this.envHandle = env;
handleLocker = null;
logger = envHandle.getEnvironmentImpl().getLogger();
}
