org.graylog2.indexer.rotation.strategies.SizeBasedRotationStrategy Maven / Gradle / Ivy

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/**
 * This file is part of Graylog.
 *
 * Graylog is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Graylog is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Graylog.  If not, see .
 */

package org.graylog2.indexer.rotation.strategies;

import org.graylog2.auditlog.AuditLogger;
import org.graylog2.indexer.Deflector;
import org.graylog2.indexer.indices.IndexStatistics;
import org.graylog2.indexer.indices.Indices;
import org.graylog2.plugin.cluster.ClusterConfigService;
import org.graylog2.plugin.indexer.rotation.RotationStrategyConfig;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.annotation.Nullable;
import javax.inject.Inject;
import java.text.MessageFormat;
import java.util.Locale;

public class SizeBasedRotationStrategy extends AbstractRotationStrategy {
    private static final Logger LOG = LoggerFactory.getLogger(SizeBasedRotationStrategy.class);

    private final Indices indices;
    private final ClusterConfigService clusterConfigService;

    @Inject
    public SizeBasedRotationStrategy(Indices indices,
                                     Deflector deflector,
                                     ClusterConfigService clusterConfigService,
                                     AuditLogger auditLogger) {
        super(deflector, auditLogger);
        this.indices = indices;
        this.clusterConfigService = clusterConfigService;
    }

    @Override
    public Class configurationClass() {
        return SizeBasedRotationStrategyConfig.class;
    }

    @Override
    public RotationStrategyConfig defaultConfiguration() {
        return SizeBasedRotationStrategyConfig.createDefault();
    }

    @Nullable
    @Override
    protected Result shouldRotate(final String index) {
        final SizeBasedRotationStrategyConfig config = clusterConfigService.get(SizeBasedRotationStrategyConfig.class);

        if (config == null) {
            LOG.warn("No rotation strategy configuration found, not running index rotation!");
            return null;
        }

        final IndexStatistics indexStats = indices.getIndexStats(index);
        if (indexStats == null) {
            return null;
        }

        final long sizeInBytes = indexStats.primaries().getStore().getSizeInBytes();

        final boolean shouldRotate = sizeInBytes > config.maxSize();

        return new Result() {
            public final MessageFormat ROTATE = new MessageFormat("Storage size for index <{0}> is {1} bytes, exceeding the maximum of {2} bytes. Rotating index.", Locale.ENGLISH);
            public final MessageFormat NOT_ROTATE = new MessageFormat("Storage size for index <{0}> is {1} bytes, below the maximum of {2} bytes. Not doing anything.", Locale.ENGLISH);

            @Override
            public String getDescription() {
                MessageFormat format = shouldRotate() ? ROTATE : NOT_ROTATE;
                return format.format(new Object[] {
                        index,
                        sizeInBytes,
                        config.maxSize()
                });
            }

            @Override
            public boolean shouldRotate() {
                return shouldRotate;
            }
        };
    }
}