org.apache.flink.runtime.state.internal.InternalAppendingState 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 org.apache.flink.runtime.state.internal;
import org.apache.flink.api.common.state.AppendingState;
/**
* The peer to the {@link AppendingState} in the internal state type hierarchy.
*
* See {@link InternalKvState} for a description of the internal state hierarchy.
*
* @param The type of key the state is associated to
* @param The type of the namespace
* @param The type of elements added to the state
* @param The type of elements in the state
* @param The type of the resulting element in the state
*/
public interface InternalAppendingState extends InternalKvState, AppendingState {
/**
* Get internally stored value.
*
* @return internally stored value.
*
* @throws Exception The method may forward exception thrown internally (by I/O or functions).
*/
SV getInternal() throws Exception;
/**
* Update internally stored value.
*
* @param valueToStore new value to store.
*
* @throws Exception The method may forward exception thrown internally (by I/O or functions).
*/
void updateInternal(SV valueToStore) throws Exception;
}