org.apache.flink.runtime.state.ttl.TtlReducingState 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.ttl;
import org.apache.flink.runtime.state.internal.InternalReducingState;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.util.Collection;
/**
* This class wraps reducing state with TTL logic.
*
* @param The type of key the state is associated to
* @param The type of the namespace
* @param Type of the user value of state with TTL
*/
class TtlReducingState
extends AbstractTtlState, InternalReducingState>>
implements InternalReducingState {
TtlReducingState(TtlStateContext>, T> tTtlStateContext) {
super(tTtlStateContext);
}
@Override
public T get() throws Exception {
accessCallback.run();
return getInternal();
}
@Override
public void add(T value) throws Exception {
accessCallback.run();
original.add(wrapWithTs(value));
}
@Nullable
@Override
public TtlValue getUnexpiredOrNull(@Nonnull TtlValue ttlValue) {
return expired(ttlValue) ? null : ttlValue;
}
@Override
public void clear() {
original.clear();
}
@Override
public void mergeNamespaces(N target, Collection sources) throws Exception {
original.mergeNamespaces(target, sources);
}
@Override
public T getInternal() throws Exception {
return getWithTtlCheckAndUpdate(original::getInternal, original::updateInternal);
}
@Override
public void updateInternal(T valueToStore) throws Exception {
original.updateInternal(wrapWithTs(valueToStore));
}
}