/*
 * 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.jackrabbit.oak.segment.standby.server;

import java.util.concurrent.TimeUnit;

import org.apache.jackrabbit.oak.segment.Segment;
import org.apache.jackrabbit.oak.segment.SegmentId;
import org.apache.jackrabbit.oak.segment.file.FileStore;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

final class FileStoreUtil {

    private static final Logger log = LoggerFactory.getLogger(FileStoreUtil.class);

    private FileStoreUtil() {
        // Prevent instantiation
    }

    static Segment readSegmentWithRetry(FileStore store, SegmentId id) {
        for (int i = 0; i < 160; i++) {
            if (store.containsSegment(id)) {
                return store.readSegment(id);
            }
            try {
                log.trace("Unable to read segment, waiting...");
                TimeUnit.MILLISECONDS.sleep(125);
            } catch (InterruptedException e) {
                Thread.currentThread().interrupt();
                return null;
            }
        }
        return null;
    }

}
