/*
* Check that the notReplicate attribute is properly immutable and
* persistent.
*/
private void validate(DatabaseConfig config, boolean replicated) throws DatabaseException {
/* Create the database -- is its config what we expect? */
db = env.openDatabase(null, TEST_DB, config);
DatabaseConfig inUseConfig = db.getConfig();
assertEquals(replicated, DbInternal.getReplicated(inUseConfig));
/* Close, re-open. */
db.close();
db = null;
db = env.openDatabase(null, TEST_DB, inUseConfig);
assertEquals(replicated, DbInternal.getReplicated(db.getConfig()));
/*
* Close, re-open w/inappropriate value for the replicated bit. This is
* only checked for replicated environments.
*/
db.close();
db = null;
if (DbInternal.getEnvironmentImpl(env).isReplicated()) {
DbInternal.setReplicated(inUseConfig, !replicated);
try {
db = env.openDatabase(null, TEST_DB, inUseConfig);
fail("Should have caught config mismatch");
} catch (IllegalArgumentException expected) {
}
}
}
BasicIndex(Database db, Class<K> keyClass, EntryBinding keyBinding, ValueAdapter<E> entityAdapter)
throws DatabaseException {
this.db = db;
DatabaseConfig config = db.getConfig();
transactional = config.getTransactional();
this.keyClass = keyClass;
this.keyBinding = keyBinding;
this.entityAdapter = entityAdapter;
emptyRange = new KeyRange(config.getBtreeComparator());
keyAdapter = new KeyValueAdapter(keyClass, keyBinding);
}
/**
* Test that we can retrieve a database configuration and that it clones its configuration
* appropriately.
*/
@Test
public void testConfig() throws Throwable {
try {
EnvironmentConfig envConfig = TestUtils.initEnvConfig();
envConfig.setAllowCreate(true);
env = create(envHome, envConfig);
/*
* Make sure that the database keeps its own copy of the
* configuration object.
*/
DatabaseConfig dbConfigA = new DatabaseConfig();
dbConfigA.setAllowCreate(true);
Database dbA = env.openDatabase(null, "foo", dbConfigA);
/* Change the original dbConfig */
dbConfigA.setAllowCreate(false);
DatabaseConfig getConfig1 = dbA.getConfig();
assertEquals(true, getConfig1.getAllowCreate());
assertEquals(false, getConfig1.getSortedDuplicates());
/*
* Change the retrieved config, ought to have no effect on what the
* Database is storing.
*/
getConfig1.setSortedDuplicates(true);
DatabaseConfig getConfig2 = dbA.getConfig();
assertEquals(false, getConfig2.getSortedDuplicates());
dbA.close();
close(env);
} catch (Throwable t) {
t.printStackTrace();
throw t;
}
}
public BerkeleyStorage(File file, boolean readonly, boolean async) {
if (file == null) {
int pid = 0;
try {
pid = Integer.parseInt((new File("/proc/self")).getCanonicalFile().getName());
} catch (NumberFormatException | IOException e) {
}
String path = "/tmp";
String db_path = System.getenv("DB");
if (db_path != null) {
path = db_path;
}
file = new File(path + "/ringpaxos-db/" + pid);
file.mkdirs();
}
EnvironmentConfig envConfig = new EnvironmentConfig();
DatabaseConfig dbConfig = new DatabaseConfig();
envConfig.setReadOnly(readonly);
dbConfig.setReadOnly(readonly);
envConfig.setAllowCreate(!readonly);
dbConfig.setAllowCreate(!readonly);
// performance settings
envConfig.setTransactional(true);
envConfig.setCacheMode(CacheMode.DEFAULT);
// envConfig.setCacheSize(1000000*800); // 800M
if (async) {
dbConfig.setTransactional(false);
envConfig.setDurability(Durability.COMMIT_NO_SYNC);
dbConfig.setDeferredWrite(true);
} else {
dbConfig.setTransactional(true);
envConfig.setDurability(Durability.COMMIT_SYNC);
dbConfig.setDeferredWrite(false);
}
env = new Environment(file, envConfig);
db = env.openDatabase(null, "paxosDB", dbConfig);
classCatalogDb = env.openDatabase(null, "ClassCatalogDB", dbConfig);
classCatalog = new StoredClassCatalog(classCatalogDb);
keyBinding = TupleBinding.getPrimitiveBinding(Long.class);
dataBinding = new SerialBinding<Decision>(classCatalog, Decision.class);
ballotBinding = TupleBinding.getPrimitiveBinding(Integer.class);
logger.info("BerkeleyStorage cache size: " + env.getMutableConfig().getCacheSize());
logger.info(
"BerkeleyStorage durability: " + env.getMutableConfig().getDurability().getLocalSync());
logger.info("BerkeleyStorage deferred write: " + db.getConfig().getDeferredWrite());
}
/*
* This method will:
* 1. apply the modified DatabaseConfig to the database.
* 2. close the database and do a sync to make sure the new configuration
* is written to the log.
* 3. open the database with a useExisting config and return the current
* DatabaseConfig.
*/
private DatabaseConfig setAndGetDbConfig(Environment env, DatabaseConfig dbConfig, String dbName)
throws Exception {
Database db = env.openDatabase(null, "foo", dbConfig);
db.close();
env.sync();
/*
* Open with the useExisting config to see what attributes have been
* persisted.
*/
DatabaseConfig newConfig = new DatabaseConfig();
newConfig.setReadOnly(true);
newConfig.setTransactional(true);
newConfig.setUseExistingConfig(true);
db = env.openDatabase(null, dbName, newConfig);
newConfig = db.getConfig();
db.close();
return newConfig;
}
@Override
public synchronized boolean trim(Long instance) {
if (instance == 0) {
return true;
} // fast track
Transaction t = null;
if (db.getConfig().getTransactional()) {
t = env.beginTransaction(null, null);
}
Cursor cursor = db.openCursor(t, null);
boolean dirty = false;
try {
while (cursor.getNext(key, data, LockMode.READ_UNCOMMITTED) == OperationStatus.SUCCESS) {
Long i = keyBinding.entryToObject(key);
if (i < instance && cursor.delete() != OperationStatus.SUCCESS) {
logger.error("Error deleting instance " + i + " from DB!");
dirty = true;
}
}
} finally {
cursor.close();
if (!dirty) {
if (t != null) {
t.commit();
}
} else {
if (t != null) {
t.abort();
}
return false;
}
}
putDecision(-1L, new Decision(0, instance, 0, null));
logger.debug("DB deltete up to instance " + instance);
return true;
}
/*
* Test that changing the Btree comparator really writes it to disk.
*/
@Test
public void testConfigOverrideUpdateSR15743() throws Throwable {
try {
EnvironmentConfig envConfig = TestUtils.initEnvConfig();
envConfig.setAllowCreate(true);
env = create(envHome, envConfig);
/*
* Make sure that the database keeps its own copy of the
* configuration object.
*/
DatabaseConfig dbConfigA = new DatabaseConfig();
dbConfigA.setOverrideBtreeComparator(false);
dbConfigA.setBtreeComparator(TestComparator.class);
dbConfigA.setAllowCreate(true);
Database dbA = env.openDatabase(null, "foo", dbConfigA);
/* Change the original dbConfig */
dbConfigA.setBtreeComparator(TestComparator2.class);
DatabaseConfig getConfig1 = dbA.getConfig();
assertEquals(TestComparator.class, getConfig1.getBtreeComparator().getClass());
/*
* Change the retrieved config, ought to have no effect on what the
* Database is storing.
*/
getConfig1.setBtreeComparator(TestComparator2.class);
DatabaseConfig getConfig2 = dbA.getConfig();
assertEquals(TestComparator.class, getConfig2.getBtreeComparator().getClass());
dbA.close();
close(env);
/* Ensure new comparator is written to disk. */
envConfig = TestUtils.initEnvConfig();
env = create(envHome, envConfig);
dbConfigA = new DatabaseConfig();
/* Change the comparator. */
dbConfigA.setOverrideBtreeComparator(true);
dbConfigA.setBtreeComparator(TestComparator2.class);
dbA = env.openDatabase(null, "foo", dbConfigA);
getConfig2 = dbA.getConfig();
assertEquals(TestComparator2.class, getConfig2.getBtreeComparator().getClass());
dbA.close();
close(env);
/* Read it back during recovery to ensure it was written. */
envConfig = TestUtils.initEnvConfig();
env = create(envHome, envConfig);
dbConfigA = new DatabaseConfig();
dbA = env.openDatabase(null, "foo", dbConfigA);
getConfig2 = dbA.getConfig();
assertEquals(TestComparator2.class, getConfig2.getBtreeComparator().getClass());
/* Create a root for the tree. */
dbA.put(null, new DatabaseEntry(new byte[1]), new DatabaseEntry(new byte[1]));
dbA.close();
close(env);
/* Change it to a third one when there is a root present. */
envConfig = TestUtils.initEnvConfig();
env = create(envHome, envConfig);
dbConfigA = new DatabaseConfig();
/* Change the comparator. */
dbConfigA.setOverrideBtreeComparator(true);
dbConfigA.setBtreeComparator(TestComparator3.class);
dbA = env.openDatabase(null, "foo", dbConfigA);
getConfig2 = dbA.getConfig();
assertEquals(TestComparator3.class, getConfig2.getBtreeComparator().getClass());
dbA.close();
close(env);
/* Read it back during recovery to ensure it was written. */
envConfig = TestUtils.initEnvConfig();
env = create(envHome, envConfig);
dbConfigA = new DatabaseConfig();
dbA = env.openDatabase(null, "foo", dbConfigA);
getConfig2 = dbA.getConfig();
assertEquals(TestComparator3.class, getConfig2.getBtreeComparator().getClass());
dbA.close();
close(env);
} catch (Throwable t) {
t.printStackTrace();
throw t;
}
}
@Test
public void testOpenReadOnly() throws Throwable {
try {
EnvironmentConfig envConfig = TestUtils.initEnvConfig();
envConfig.setTransactional(true);
envConfig.setAllowCreate(true);
env = create(envHome, envConfig);
DatabaseEntry key = new DatabaseEntry();
DatabaseEntry data = new DatabaseEntry();
Transaction txn = env.beginTransaction(null, null);
DatabaseConfig dbConfig = new DatabaseConfig();
dbConfig.setTransactional(true);
dbConfig.setAllowCreate(true);
Database myDb = env.openDatabase(txn, "testDB2", dbConfig);
key.setData(TestUtils.getTestArray(0));
data.setData(TestUtils.getTestArray(0));
try {
myDb.put(txn, key, data);
} catch (DatabaseException DBE) {
fail("unexpected DatabaseException during put");
}
txn.commit();
myDb.close();
dbConfig = new DatabaseConfig();
dbConfig.setTransactional(true);
dbConfig.setReadOnly(true);
txn = env.beginTransaction(null, null);
myDb = env.openDatabase(txn, "testDB2", dbConfig);
assertTrue(myDb.isTransactional());
assertTrue(myDb.getConfig().getTransactional());
key.setData(TestUtils.getTestArray(0));
data.setData(TestUtils.getTestArray(0));
try {
myDb.put(txn, key, data);
fail("expected UnsupportedOperationException " + "because open RDONLY");
} catch (UnsupportedOperationException expected) {
}
key.setData(TestUtils.getTestArray(0));
data.setData(TestUtils.getTestArray(0));
assertEquals(OperationStatus.SUCCESS, myDb.get(txn, key, data, LockMode.DEFAULT));
Cursor cursor = myDb.openCursor(txn, null);
assertEquals(OperationStatus.SUCCESS, cursor.getFirst(key, data, LockMode.DEFAULT));
try {
cursor.delete();
fail("expected Exception from delete on RD_ONLY db");
} catch (UnsupportedOperationException e) {
}
key.setData(TestUtils.getTestArray(1));
data.setData(TestUtils.getTestArray(1));
try {
myDb.put(txn, key, data);
fail("expected UnsupportedOperationException because open RDONLY");
} catch (UnsupportedOperationException expected) {
}
cursor.close();
txn.commit();
myDb.close();
close(env);
} catch (Throwable t) {
t.printStackTrace();
throw t;
}
}
@Test
public void testIsTransactional() throws Throwable {
try {
/* Open environment in transactional mode.*/
EnvironmentConfig envConfig = TestUtils.initEnvConfig();
envConfig.setTransactional(true);
envConfig.setAllowCreate(true);
env = create(envHome, envConfig);
/* Create a db, open transactionally with implied auto-commit. */
DatabaseConfig dbConfig = new DatabaseConfig();
dbConfig.setAllowCreate(true);
dbConfig.setTransactional(true);
Database myDb = env.openDatabase(null, "testDB", dbConfig);
assertTrue(myDb.isTransactional());
assertTrue(myDb.getConfig().getTransactional());
myDb.close();
/* Open an existing db, can open it non-transactionally. */
dbConfig.setTransactional(false);
myDb = env.openDatabase(null, "testDB", null);
assertFalse(myDb.isTransactional());
assertFalse(myDb.getConfig().getTransactional());
myDb.close();
/* Open another db, pass an explicit transaction. */
dbConfig.setTransactional(true);
Transaction txn = env.beginTransaction(null, null);
myDb = env.openDatabase(txn, "testDB2", dbConfig);
assertTrue(myDb.isTransactional());
assertTrue(myDb.getConfig().getTransactional());
DatabaseEntry key = new DatabaseEntry();
DatabaseEntry data = new DatabaseEntry();
key.setData(TestUtils.getTestArray(0));
data.setData(TestUtils.getTestArray(0));
try {
myDb.put(null, key, data);
} catch (DatabaseException DBE) {
fail("didn't expect DatabaseException, implied autocommit");
}
key.setData(TestUtils.getTestArray(1));
data.setData(TestUtils.getTestArray(1));
try {
myDb.put(txn, key, data);
} catch (DatabaseException DBE) {
fail("didn't expect DatabaseException with txn passed");
}
try {
myDb.get(txn, key, data, LockMode.DEFAULT);
} catch (DatabaseException DBE) {
fail("didn't expect DatabaseException with txn passed");
}
txn.commit();
try {
myDb.get(null, key, data, LockMode.DEFAULT);
} catch (DatabaseException DBE) {
fail("didn't expect DatabaseException because no txn passed");
}
myDb.close();
close(env);
} catch (Throwable t) {
t.printStackTrace();
throw t;
}
}
/**
* Test that any conflicts between configuration object settings and the underlying impl object
* are detected.
*/
@Test
public void testConfigConflict() throws Throwable {
try {
EnvironmentConfig envConfig = TestUtils.initEnvConfig();
envConfig.setAllowCreate(true);
env = create(envHome, envConfig);
/*
* Test conflicts of duplicate allowed configuration.
*/
/* 1a. Create allowing duplicates. */
DatabaseConfig firstConfig = new DatabaseConfig();
firstConfig.setAllowCreate(true);
firstConfig.setSortedDuplicates(true);
Database firstHandle = env.openDatabase(null, "fooDups", firstConfig);
/* 1b. Try to open w/no duplicates. */
DatabaseConfig secondConfig = new DatabaseConfig();
secondConfig.setSortedDuplicates(false);
try {
env.openDatabase(null, "fooDups", secondConfig);
fail("Conflict in duplicates allowed should be detected.");
} catch (IllegalArgumentException expected) {
}
firstHandle.close();
env.removeDatabase(null, "fooDups");
/* 2a. Create dis-allowing duplicates. */
firstConfig.setSortedDuplicates(false);
firstConfig.setKeyPrefixing(false);
firstHandle = env.openDatabase(null, "fooDups", firstConfig);
/* 2b. Try to open w/duplicates. */
secondConfig.setSortedDuplicates(true);
try {
env.openDatabase(null, "fooDups", secondConfig);
fail("Conflict in duplicates allowed should be detected.");
} catch (IllegalArgumentException expected) {
}
firstHandle.close();
/*
* Test conflicts of read only. If the environment is read/write
* we should be able to open handles in read only or read/write
* mode. If the environment is readonly, the database handles
* must also be read only.
*/
DatabaseConfig readOnlyConfig = new DatabaseConfig();
readOnlyConfig.setReadOnly(true);
Database roHandle = env.openDatabase(null, "fooDups", readOnlyConfig);
roHandle.close();
/* Open the environment in read only mode. */
close(env);
envConfig = TestUtils.initEnvConfig();
envConfig.setReadOnly(true);
env = create(envHome, envConfig);
/* Open a readOnly database handle, should succeed */
roHandle = env.openDatabase(null, "fooDups", readOnlyConfig);
roHandle.close();
/* Open a read/write database handle, should not succeed. */
try {
env.openDatabase(null, "fooDups", null);
fail("Should not be able to open read/write");
} catch (IllegalArgumentException expected) {
}
close(env);
/*
* Check comparator changes.
*/
/* 1a. Open w/a null comparator */
env = create(envHome, null);
firstConfig = new DatabaseConfig();
firstConfig.setAllowCreate(true);
firstHandle = env.openDatabase(null, "fooComparator", firstConfig);
DatabaseConfig firstRetrievedConfig = firstHandle.getConfig();
assertEquals(null, firstRetrievedConfig.getBtreeComparator());
assertEquals(null, firstRetrievedConfig.getDuplicateComparator());
/*
* 1b. Open a db w/a different comparator, shouldn't take effect
* because override is not set.
*/
secondConfig = new DatabaseConfig();
Comparator btreeComparator = new TestComparator();
Comparator dupComparator = new TestComparator();
secondConfig.setBtreeComparator((Class<Comparator<byte[]>>) btreeComparator.getClass());
secondConfig.setDuplicateComparator((Class<Comparator<byte[]>>) dupComparator.getClass());
Database secondHandle = env.openDatabase(null, "fooComparator", secondConfig);
DatabaseConfig retrievedConfig = secondHandle.getConfig();
assertEquals(null, retrievedConfig.getBtreeComparator());
assertEquals(null, retrievedConfig.getDuplicateComparator());
secondHandle.close();
/* Same as above but with a serialized comparator. */
secondConfig = new DatabaseConfig();
btreeComparator = new TestSerialComparator();
dupComparator = new TestSerialComparator();
secondConfig.setBtreeComparator(btreeComparator);
secondConfig.setDuplicateComparator(dupComparator);
secondHandle = env.openDatabase(null, "fooComparator", secondConfig);
retrievedConfig = secondHandle.getConfig();
assertEquals(null, retrievedConfig.getBtreeComparator());
assertEquals(null, retrievedConfig.getDuplicateComparator());
secondHandle.close();
/*
* Test that update DatabaseConfig while there are open handles
* should throw exceptions.
*/
secondConfig.setOverrideBtreeComparator(true);
secondConfig.setOverrideDuplicateComparator(true);
btreeComparator = new TestComparator();
dupComparator = new TestComparator();
secondConfig.setBtreeComparator((Class<Comparator<byte[]>>) btreeComparator.getClass());
secondConfig.setDuplicateComparator((Class<Comparator<byte[]>>) dupComparator.getClass());
try {
secondHandle = env.openDatabase(null, "fooComparator", secondConfig);
fail("Expect exceptions here");
} catch (IllegalStateException e) {
/* Expected exception. */
} catch (Exception e) {
fail("Unexpected exception: " + e.getMessage());
}
secondHandle.close();
/*
* Open a new database handle without DatabaseConfig changes should
* be valid.
*/
try {
secondHandle = env.openDatabase(null, "fooComparator", firstConfig);
} catch (Exception e) {
fail("Unexpected exception: " + e.getMessage());
}
secondHandle.close();
firstHandle.close();
close(env);
} catch (Throwable t) {
t.printStackTrace();
close(env);
throw t;
}
}
/**
* Opens a sequence handle, adding the sequence record if appropriate.
*
* @throws IllegalArgumentException via Database.openSequence.
* @throws IllegalStateException via Database.openSequence.
*/
Sequence(Database db, Transaction txn, DatabaseEntry key, SequenceConfig config)
throws SequenceNotFoundException, SequenceExistsException {
if (db.getDatabaseImpl().getSortedDuplicates()) {
throw new UnsupportedOperationException(
"Sequences not supported in databases configured for " + "duplicates");
}
SequenceConfig useConfig = (config != null) ? config : SequenceConfig.DEFAULT;
if (useConfig.getRangeMin() >= useConfig.getRangeMax()) {
throw new IllegalArgumentException("Minimum sequence value must be less than the maximum");
}
if (useConfig.getInitialValue() > useConfig.getRangeMax()
|| useConfig.getInitialValue() < useConfig.getRangeMin()) {
throw new IllegalArgumentException("Initial sequence value is out of range");
}
if (useConfig.getRangeMin() > useConfig.getRangeMax() - useConfig.getCacheSize()) {
throw new IllegalArgumentException("The cache size is larger than the sequence range");
}
if (useConfig.getAutoCommitNoSync()) {
autoCommitConfig = DbInternal.getDefaultTxnConfig(db.getEnvironment()).clone();
autoCommitConfig.overrideDurability(Durability.COMMIT_NO_SYNC);
} else {
/* Use the environment's default transaction config. */
autoCommitConfig = null;
}
this.db = db;
this.key = copyEntry(key);
logger = db.getEnvironment().getEnvironmentImpl().getLogger();
/* Perform an auto-commit transaction to create the sequence. */
Locker locker = null;
Cursor cursor = null;
OperationStatus status = OperationStatus.NOTFOUND;
try {
locker =
LockerFactory.getReadableLocker(
db.getEnvironment(),
txn,
db.isTransactional(),
false /*retainNonTxnLocks*/,
false /*readCommitedIsolation*/);
cursor = new Cursor(db, locker, null);
boolean sequenceExists = readData(cursor, null);
boolean isWritableLocker =
!db.getConfig().getTransactional()
|| (locker.isTransactional()
&& !DbInternal.getEnvironmentImpl(db.getEnvironment()).isReplicated());
if (sequenceExists) {
if (useConfig.getAllowCreate() && useConfig.getExclusiveCreate()) {
throw new SequenceExistsException(
"ExclusiveCreate=true and the sequence record " + "already exists.");
}
} else {
if (useConfig.getAllowCreate()) {
if (!isWritableLocker) {
if (cursor != null) {
cursor.close();
}
locker.operationEnd(OperationStatus.SUCCESS);
locker =
LockerFactory.getWritableLocker(
db.getEnvironment(),
txn,
db.isTransactional(),
false,
db.getDatabaseImpl().isReplicated(),
autoCommitConfig);
cursor = new Cursor(db, locker, null);
}
/* Get the persistent fields from the config. */
rangeMin = useConfig.getRangeMin();
rangeMax = useConfig.getRangeMax();
increment = !useConfig.getDecrement();
wrapAllowed = useConfig.getWrap();
storedValue = useConfig.getInitialValue();
/*
* To avoid dependence on SerializableIsolation, try
* putNoOverwrite first. If it fails, then try to get an
* existing record.
*/
status = cursor.putNoOverwrite(key, makeData());
if (!readData(cursor, null)) {
/* A retry loop should be performed here. */
throw new IllegalStateException("Sequence record removed during openSequence.");
}
status = OperationStatus.SUCCESS;
} else {
throw new SequenceNotFoundException(
"AllowCreate=false and the sequence record " + "does not exist.");
}
}
} finally {
if (cursor != null) {
cursor.close();
}
if (locker != null) {
locker.operationEnd(status);
}
}
/*
* cacheLast is initialized such that the cache will be considered
* empty the first time get() is called.
*/
cacheSize = useConfig.getCacheSize();
cacheValue = storedValue;
cacheLast = increment ? (storedValue - 1) : (storedValue + 1);
}
/**
* Opens a secondary index with a given transaction and adds it to the secIndexMap. We assume that
* the index is not already open.
*/
private <SK, PK, E1, E2 extends E1> SecondaryIndex<SK, PK, E2> openSecondaryIndex(
Transaction txn,
PrimaryIndex<PK, E1> primaryIndex,
Class<E2> entityClass,
EntityMetadata entityMeta,
Class<SK> keyClass,
String keyClassName,
SecondaryKeyMetadata secKeyMeta,
String secName,
boolean doNotCreate,
PrimaryOpenState priOpenState)
throws DatabaseException {
assert !secIndexMap.containsKey(secName);
String dbName = storePrefix + secName;
SecondaryConfig config = getSecondaryConfig(secName, entityMeta, keyClassName, secKeyMeta);
Database priDb = primaryIndex.getDatabase();
DatabaseConfig priConfig = priDb.getConfig();
String relatedClsName = secKeyMeta.getRelatedEntity();
if (relatedClsName != null) {
PrimaryIndex relatedIndex = getRelatedIndex(relatedClsName);
config.setForeignKeyDatabase(relatedIndex.getDatabase());
}
if (config.getTransactional() != priConfig.getTransactional()
|| DbCompat.getDeferredWrite(config) != DbCompat.getDeferredWrite(priConfig)
|| config.getReadOnly() != priConfig.getReadOnly()) {
throw new IllegalArgumentException(
"One of these properties was changed to be inconsistent"
+ " with the associated primary database: "
+ " Transactional, DeferredWrite, ReadOnly");
}
PersistKeyBinding keyBinding = getKeyBinding(keyClassName);
/*
* doNotCreate is true when StoreConfig.getSecondaryBulkLoad is true
* and we are opening a secondary as a side effect of opening a
* primary, i.e., getSecondaryIndex is not being called. If
* doNotCreate is true and the database does not exist, we silently
* ignore the DatabaseNotFoundException and return null. When
* getSecondaryIndex is subsequently called, the secondary database
* will be created and populated from the primary -- a bulk load.
*/
SecondaryDatabase db;
boolean saveAllowCreate = config.getAllowCreate();
try {
if (doNotCreate) {
config.setAllowCreate(false);
}
db = env.openSecondaryDatabase(txn, dbName, priDb, config);
} catch (DatabaseNotFoundException e) {
if (doNotCreate) {
return null;
} else {
throw e;
}
} finally {
if (doNotCreate) {
config.setAllowCreate(saveAllowCreate);
}
}
SecondaryIndex<SK, PK, E2> secIndex =
new SecondaryIndex(db, null, primaryIndex, keyClass, keyBinding);
/* Update index and database maps. */
secIndexMap.put(secName, secIndex);
if (DbCompat.getDeferredWrite(config)) {
deferredWriteDatabases.put(db, null);
}
if (priOpenState != null) {
priOpenState.addDatabase(db);
priOpenState.addSecondaryName(secName);
}
return secIndex;
}