/
SnapshottableMap.java
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/
SnapshottableMap.java
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/**
* 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 org.apache.storm.trident.state.map;
import java.util.Arrays;
import java.util.List;
import org.apache.storm.trident.state.ValueUpdater;
import org.apache.storm.trident.state.snapshot.Snapshottable;
public class SnapshottableMap<T> implements MapState<T>, Snapshottable<T> {
MapState<T> _delegate;
List<List<Object>> _keys;
public SnapshottableMap(MapState<T> delegate, List<Object> snapshotKey) {
_delegate = delegate;
_keys = Arrays.asList(snapshotKey);
}
@Override
public List<T> multiGet(List<List<Object>> keys) {
return _delegate.multiGet(keys);
}
@Override
public List<T> multiUpdate(List<List<Object>> keys, List<ValueUpdater> updaters) {
return _delegate.multiUpdate(keys, updaters);
}
@Override
public void multiPut(List<List<Object>> keys, List<T> vals) {
_delegate.multiPut(keys, vals);
}
@Override
public void beginCommit(Long txid) {
_delegate.beginCommit(txid);
}
@Override
public void commit(Long txid) {
_delegate.commit(txid);
}
@Override
public T get() {
return multiGet(_keys).get(0);
}
@Override
public T update(ValueUpdater updater) {
List<ValueUpdater> updaters = Arrays.asList(updater);
return multiUpdate(_keys, updaters).get(0);
}
@Override
public void set(T o) {
multiPut(_keys, Arrays.asList(o));
}
}