/** See if this new handle's configuration is compatible with the pre-existing database. */
private void validateConfigAgainstExistingDb(DatabaseConfig config, DatabaseImpl databaseImpl)
throws DatabaseException {
/*
* The allowDuplicates property is persistent and immutable. It does
* not need to be specified if the useExistingConfig property is set.
*/
if (!config.getUseExistingConfig()) {
if (databaseImpl.getSortedDuplicates() != config.getSortedDuplicates()) {
throw new DatabaseException(
"You can't open a Database with a duplicatesAllowed "
+ "configuration of "
+ config.getSortedDuplicates()
+ " if the underlying database was created with a "
+ "duplicatesAllowedSetting of "
+ databaseImpl.getSortedDuplicates()
+ ".");
}
}
/*
* The transactional property is kept constant while any handles are
* open, and set when the first handle is opened. It does not need to
* be specified if the useExistingConfig property is set.
*/
if (databaseImpl.hasOpenHandles()) {
if (!config.getUseExistingConfig()) {
if (config.getTransactional() != databaseImpl.isTransactional()) {
throw new DatabaseException(
"You can't open a Database with a transactional "
+ "configuration of "
+ config.getTransactional()
+ " if the underlying database was created with a "
+ "transactional configuration of "
+ databaseImpl.isTransactional()
+ ".");
}
}
} else {
databaseImpl.setTransactional(config.getTransactional());
}
/*
* Only re-set the comparators if the override is allowed.
*/
if (config.getOverrideBtreeComparator()) {
databaseImpl.setBtreeComparator(config.getBtreeComparator());
}
if (config.getOverrideDuplicateComparator()) {
databaseImpl.setDuplicateComparator(config.getDuplicateComparator());
}
}
/**
* 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;
}
}
private void validateConfigAgainstExistingDb__wrappee__base(
DatabaseConfig config, DatabaseImpl databaseImpl) throws DatabaseException {
if (!config.getUseExistingConfig()) {
if (databaseImpl.getSortedDuplicates() != config.getSortedDuplicates()) {
throw new DatabaseException(
"You can't open a Database with a duplicatesAllowed "
+ "configuration of "
+ config.getSortedDuplicates()
+ " if the underlying database was created with a "
+ "duplicatesAllowedSetting of "
+ databaseImpl.getSortedDuplicates()
+ ".");
}
}
if (databaseImpl.hasOpenHandles()) {
if (!config.getUseExistingConfig()) {
if (config.getTransactional() != databaseImpl.isTransactional()) {
throw new DatabaseException(
"You can't open a Database with a transactional "
+ "configuration of "
+ config.getTransactional()
+ " if the underlying database was created with a "
+ "transactional configuration of "
+ databaseImpl.isTransactional()
+ ".");
}
}
} else {
databaseImpl.setTransactional(config.getTransactional());
}
if (config.getOverrideBtreeComparator()) {
databaseImpl.setBtreeComparator(config.getBtreeComparator());
}
if (config.getOverrideDuplicateComparator()) {
databaseImpl.setDuplicateComparator(config.getDuplicateComparator());
}
}
