/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.facebook.presto.metadata;
import com.facebook.presto.connector.ConnectorId;
import com.google.common.collect.ImmutableList;
import javax.annotation.concurrent.ThreadSafe;
import java.util.List;
import java.util.Optional;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import static com.google.common.base.Preconditions.checkState;
import static java.util.Objects.requireNonNull;
@ThreadSafe
public class CatalogManager
{
private final ConcurrentMap<String, Catalog> catalogs = new ConcurrentHashMap<>();
public synchronized void registerCatalog(Catalog catalog)
{
requireNonNull(catalog, "catalog is null");
checkState(catalogs.put(catalog.getCatalogName(), catalog) == null, "Catalog '%s' is already registered", catalog.getCatalogName());
}
public Optional<ConnectorId> removeCatalog(String catalogName)
{
return Optional.ofNullable(catalogs.remove(catalogName))
.map(Catalog::getConnectorId);
}
public List<Catalog> getCatalogs()
{
return ImmutableList.copyOf(catalogs.values());
}
public Optional<Catalog> getCatalog(String catalogName)
{
return Optional.ofNullable(catalogs.get(catalogName));
}
}