eae09fc07e
* Reduces checkstyle errors in lazy-loading * Reduces checkstyle errors in leader-election * Reduces checkstyle errors in api-gateway
56 lines
1.8 KiB
Java
56 lines
1.8 KiB
Java
/*
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* The MIT License
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* Copyright © 2014-2019 Ilkka Seppälä
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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package com.iluwatar.lazy.loading;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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/**
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* Same as HolderNaive but with added synchronization. This implementation is thread safe, but each
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* {@link #getHeavy()} call costs additional synchronization overhead.
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*/
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public class HolderThreadSafe {
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private static final Logger LOGGER = LoggerFactory.getLogger(HolderThreadSafe.class);
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private Heavy heavy;
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/**
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* Constructor.
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*/
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public HolderThreadSafe() {
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LOGGER.info("HolderThreadSafe created");
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}
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/**
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* Get heavy object.
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*/
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public synchronized Heavy getHeavy() {
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if (heavy == null) {
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heavy = new Heavy();
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}
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return heavy;
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}
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}
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