6 changed files with 108 additions and 6 deletions
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/** |
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* Copyright © 2016-2025 The Thingsboard Authors |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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package org.thingsboard.common.util; |
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import com.github.benmanes.caffeine.cache.Cache; |
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import com.github.benmanes.caffeine.cache.Caffeine; |
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import java.util.concurrent.TimeUnit; |
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public class SetCache<K> { |
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private static final Object DUMMY_VALUE = Boolean.TRUE; |
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private final Cache<K, Object> cache; |
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public SetCache(long valueTtlMs) { |
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this.cache = Caffeine.newBuilder() |
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.expireAfterWrite(valueTtlMs, TimeUnit.MILLISECONDS) |
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.build(); |
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} |
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public void add(K key) { |
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cache.put(key, DUMMY_VALUE); |
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} |
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public boolean contains(K key) { |
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return cache.asMap().containsKey(key); |
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} |
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public void remove(K key) { |
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cache.invalidate(key); |
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} |
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} |
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