flink-connectors/flink-connector-elasticsearch-base/src/main/java/org/apache/flink/streaming/connectors/elasticsearch/util/RetryRejectedExecutionFailureHandler.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.flink.streaming.connectors.elasticsearch.util;

import org.apache.flink.annotation.PublicEvolving;
import org.apache.flink.streaming.connectors.elasticsearch.ActionRequestFailureHandler;
import org.apache.flink.streaming.connectors.elasticsearch.RequestIndexer;
import org.apache.flink.util.ExceptionUtils;

import org.elasticsearch.action.ActionRequest;
import org.elasticsearch.common.util.concurrent.EsRejectedExecutionException;

/**
 * An {@link ActionRequestFailureHandler} that re-adds requests that failed due to temporary
 * {@link EsRejectedExecutionException}s (which means that Elasticsearch node queues are currently full),
 * and fails for all other failures.
 */
@PublicEvolving
public class RetryRejectedExecutionFailureHandler implements ActionRequestFailureHandler {

	private static final long serialVersionUID = -7423562912824511906L;

	@Override
	public void onFailure(ActionRequest action, Throwable failure, int restStatusCode, RequestIndexer indexer) throws Throwable {
		if (ExceptionUtils.findThrowable(failure, EsRejectedExecutionException.class).isPresent()) {
			indexer.add(action);
		} else {
			// rethrow all other failures
			throw failure;
		}
	}

}