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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.run;

import joptsimple.OptionParser;
import joptsimple.OptionSet;
import joptsimple.OptionSpec;
import org.apache.jackrabbit.oak.indexversion.PurgeOldIndexVersion;
import org.apache.jackrabbit.oak.run.cli.NodeStoreFixture;
import org.apache.jackrabbit.oak.run.cli.NodeStoreFixtureProvider;
import org.apache.jackrabbit.oak.run.cli.Options;
import org.apache.jackrabbit.oak.run.commons.Command;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.List;
import java.util.concurrent.TimeUnit;

public abstract class PurgeOldIndexVersionCommand implements Command {
    private static final Logger LOG = LoggerFactory.getLogger(PurgeOldIndexVersionCommand.class);

    private long threshold;
    private List indexPaths;
    private long DEFAULT_PURGE_THRESHOLD = TimeUnit.DAYS.toMillis(5); // 5 days in millis
    private final static String DEFAULT_INDEX_PATH = "/oak:index";
    private boolean shouldPurgeBaseIndex;

    @Override
    public void execute(String... args) throws Exception {
        Options opts = parseCommandLineParams(args);
        try (NodeStoreFixture fixture = NodeStoreFixtureProvider.create(opts)) {
            if (!opts.getCommonOpts().isReadWrite()) {
                LOG.info("Repository connected in read-only mode. Use '--read-write' for write operations");
            }
            getPurgeOldIndexVersionInstance().execute(fixture.getStore(), opts.getCommonOpts().isReadWrite(), threshold, indexPaths, shouldPurgeBaseIndex);
        }
    }

    private Options parseCommandLineParams(String... args) throws Exception {
        OptionParser parser = new OptionParser();
        parser.allowsUnrecognizedOptions();
        OptionSpec thresholdOption = parser.accepts("threshold")
                .withOptionalArg().ofType(Long.class).defaultsTo(DEFAULT_PURGE_THRESHOLD);
        OptionSpec indexPathsOption = parser.accepts("index-paths", "Comma separated list of index paths for which the " +
                "selected operations need to be performed")
                .withOptionalArg().ofType(String.class).withValuesSeparatedBy(",").defaultsTo(DEFAULT_INDEX_PATH);
        OptionSpec donotPurgeBaseIndexOption = parser.accepts("donot-purge-base-index", "Don't disable base index");

        Options opts = new Options();
        OptionSet optionSet = opts.parseAndConfigure(parser, args);
        this.threshold = optionSet.valueOf(thresholdOption);
        this.indexPaths = optionSet.valuesOf(indexPathsOption);
        this.shouldPurgeBaseIndex = !optionSet.has(donotPurgeBaseIndexOption);
        return opts;
    }

    protected abstract PurgeOldIndexVersion getPurgeOldIndexVersionInstance();
}