org.apache.jackrabbit.oak.plugins.blob.ReferenceCollector Maven / Gradle / Ivy

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/*
 * 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.plugins.blob;

import javax.annotation.Nullable;

/**
 * Callback interface for collecting all blob references that are
 * potentially accessible. Useful for marking referenced blobs as
 * in use when collecting garbage in an external data store.
 */
public interface ReferenceCollector {
    
    /**
     * Adds the reference detected with the node Id.
     * 
     * @param reference
     * @param nodeId
     */
    void addReference(String reference, @Nullable String nodeId);
}