ca.uhn.fhir.jpa.search.reindex.BlockPolicy Maven / Gradle / Ivy

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This project provides services useful for fhir repository storage. Actual repository storage services are not in this project, just the api and helper libraries.

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/*-
 * #%L
 * HAPI FHIR Storage api
 * %%
 * Copyright (C) 2014 - 2024 Smile CDR, Inc.
 * %%
 * 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.
 * #L%
 */
package ca.uhn.fhir.jpa.search.reindex;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.concurrent.RejectedExecutionHandler;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * A handler for rejected tasks that will have the caller block until space is available.
 * This was stolen from old hibernate search(5.X.X), as it has been removed in HS6. We can probably come up with a better solution though.
 */
// TODO KHS consolidate with the other BlockPolicy class this looks like it is a duplicate of
public class BlockPolicy implements RejectedExecutionHandler {
	private static final Logger ourLog = LoggerFactory.getLogger(BlockPolicy.class);

	/**
	 * Puts the Runnable to the blocking queue, effectively blocking the delegating thread until space is available.
	 *
	 * @param r the runnable task requested to be executed
	 * @param e the executor attempting to execute this task
	 */
	@Override
	public void rejectedExecution(Runnable r, ThreadPoolExecutor e) {
		try {
			e.getQueue().put(r);
		} catch (InterruptedException e1) {
			ourLog.error("Interrupted Execption for task: {}", r, e1);
			Thread.currentThread().interrupt();
		}
	}
}