com.hazelcast.map.impl.querycache.accumulator.AbstractAccumulator Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2020, Hazelcast, Inc. All Rights Reserved.
*
* 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.hazelcast.map.impl.querycache.accumulator;
import com.hazelcast.map.impl.querycache.QueryCacheContext;
import com.hazelcast.map.impl.querycache.event.QueryCacheEventData;
import com.hazelcast.map.impl.querycache.event.sequence.DefaultPartitionSequencer;
import com.hazelcast.map.impl.querycache.event.sequence.PartitionSequencer;
import com.hazelcast.map.impl.querycache.event.sequence.Sequenced;
import com.hazelcast.internal.util.Clock;
/**
* Contains helpers for an {@code Accumulator} implementation.
*
* @param the type of element which will be accumulated.
*/
abstract class AbstractAccumulator implements Accumulator {
protected final AccumulatorInfo info;
protected final QueryCacheContext context;
protected final CyclicBuffer buffer;
protected final PartitionSequencer partitionSequencer;
AbstractAccumulator(QueryCacheContext context, AccumulatorInfo info) {
this.context = context;
this.info = info;
this.partitionSequencer = new DefaultPartitionSequencer();
this.buffer = new DefaultCyclicBuffer<>(info.getBufferSize());
}
public CyclicBuffer getBuffer() {
return buffer;
}
protected QueryCacheContext getContext() {
return context;
}
protected long getNow() {
return Clock.currentTimeMillis();
}
protected boolean isExpired(QueryCacheEventData entry, long delayMillis, long now) {
return entry != null
&& (now - entry.getCreationTime()) >= delayMillis;
}
@Override
public void reset() {
buffer.reset();
partitionSequencer.reset();
}
}