001package ca.uhn.fhir.util;
002
003/*-
004 * #%L
005 * HAPI FHIR Storage api
006 * %%
007 * Copyright (C) 2014 - 2022 Smile CDR, Inc.
008 * %%
009 * Licensed under the Apache License, Version 2.0 (the "License");
010 * you may not use this file except in compliance with the License.
011 * You may obtain a copy of the License at
012 *
013 *      http://www.apache.org/licenses/LICENSE-2.0
014 *
015 * Unless required by applicable law or agreed to in writing, software
016 * distributed under the License is distributed on an "AS IS" BASIS,
017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
018 * See the License for the specific language governing permissions and
019 * limitations under the License.
020 * #L%
021 */
022
023import ca.uhn.fhir.jpa.search.reindex.BlockPolicy;
024import org.apache.commons.lang3.Validate;
025import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
026
027import javax.annotation.Nonnull;
028
029public final class ThreadPoolUtil {
030        private ThreadPoolUtil() {
031        }
032
033
034        @Nonnull
035        public static ThreadPoolTaskExecutor newThreadPool(int theCorePoolSize, int theMaxPoolSize, String theThreadNamePrefix) {
036                Validate.isTrue(theThreadNamePrefix.endsWith("-"), "Thread pool prefix name must end with a hyphen");
037                ThreadPoolTaskExecutor asyncTaskExecutor = new ThreadPoolTaskExecutor();
038                asyncTaskExecutor.setCorePoolSize(theCorePoolSize);
039                asyncTaskExecutor.setMaxPoolSize(theMaxPoolSize);
040                asyncTaskExecutor.setQueueCapacity(0);
041                asyncTaskExecutor.setAllowCoreThreadTimeOut(true);
042                asyncTaskExecutor.setThreadNamePrefix(theThreadNamePrefix);
043                asyncTaskExecutor.setRejectedExecutionHandler(new BlockPolicy());
044                asyncTaskExecutor.initialize();
045                return asyncTaskExecutor;
046        }
047}