studio.raptor.ddal.config.model.shard.Shards Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 studio.raptor.ddal.config.model.shard;
import com.google.common.base.Preconditions;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
public class Shards extends ArrayList {
private static final long serialVersionUID = 1L;
private Map _shards = new TreeMap<>();
private List shardNames = new ArrayList<>();
@Override
public boolean add(Shard s) {
Preconditions.checkArgument(!_shards.containsKey(s.getName()), s.getName() + " exists in shardings");
_shards.put(s.getName(), s);
return super.add(s);
}
public Shard get(String name) {
return _shards.get(name);
}
public List allShardNames() {
if(shardNames.isEmpty()){
shardNames = new ArrayList<>(_shards.keySet());
}
return shardNames;
}
}