org.glowroot.storage.repo.helper.RollupLevelService.java Source code

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Here is the source code for org.glowroot.storage.repo.helper.RollupLevelService.java

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/*
 * Copyright 2015 the original author or authors.
 *
 * Licensed 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.glowroot.storage.repo.helper;

import java.util.List;

import com.google.common.collect.ImmutableList;

import org.glowroot.common.util.Clock;
import org.glowroot.storage.repo.ConfigRepository;
import org.glowroot.storage.repo.ConfigRepository.RollupConfig;

import static java.util.concurrent.TimeUnit.HOURS;

public class RollupLevelService {

    private final ConfigRepository configRepository;
    private final Clock clock;

    public RollupLevelService(ConfigRepository configRepository, Clock clock) {
        this.configRepository = configRepository;
        this.clock = clock;
    }

    public int getRollupLevelForView(long captureTimeFrom, long captureTimeTo) throws Exception {
        long millis = captureTimeTo - captureTimeFrom;
        long timeAgoMillis = clock.currentTimeMillis() - captureTimeFrom;
        ImmutableList<Integer> rollupExpirationHours = configRepository.getStorageConfig().rollupExpirationHours();
        List<RollupConfig> rollupConfigs = configRepository.getRollupConfigs();
        for (int i = 0; i < rollupConfigs.size() - 1; i++) {
            RollupConfig nextRollupConfig = rollupConfigs.get(i + 1);
            if (millis < nextRollupConfig.viewThresholdMillis()
                    && HOURS.toMillis(rollupExpirationHours.get(i)) > timeAgoMillis) {
                return i;
            }
        }
        return rollupConfigs.size() - 1;
    }

    public int getGaugeRollupLevelForView(long captureTimeFrom, long captureTimeTo) throws Exception {
        long millis = captureTimeTo - captureTimeFrom;
        long timeAgoMillis = clock.currentTimeMillis() - captureTimeFrom;
        ImmutableList<Integer> rollupExpirationHours = configRepository.getStorageConfig().rollupExpirationHours();
        List<RollupConfig> rollupConfigs = configRepository.getRollupConfigs();
        // gauge point rollup level 0 shares rollup level 1's expiration
        if (millis < rollupConfigs.get(0).viewThresholdMillis()
                && HOURS.toMillis(rollupExpirationHours.get(0)) > timeAgoMillis) {
            return 0;
        }
        for (int i = 0; i < rollupConfigs.size() - 1; i++) {
            if (millis < rollupConfigs.get(i + 1).viewThresholdMillis()
                    && HOURS.toMillis(rollupExpirationHours.get(i)) > timeAgoMillis) {
                return i + 1;
            }
        }
        return rollupConfigs.size();
    }

    public long getDataPointIntervalMillis(long captureTimeFrom, long captureTimeTo) throws Exception {
        long millis = captureTimeTo - captureTimeFrom;
        long timeAgoMillis = clock.currentTimeMillis() - captureTimeFrom;
        ImmutableList<Integer> rollupExpirationHours = configRepository.getStorageConfig().rollupExpirationHours();
        List<RollupConfig> rollupConfigs = configRepository.getRollupConfigs();
        for (int i = 0; i < rollupConfigs.size() - 1; i++) {
            RollupConfig currRollupConfig = rollupConfigs.get(i);
            RollupConfig nextRollupConfig = rollupConfigs.get(i + 1);
            if (millis < nextRollupConfig.viewThresholdMillis()
                    && HOURS.toMillis(rollupExpirationHours.get(i)) > timeAgoMillis) {
                return currRollupConfig.intervalMillis();
            }
        }
        return rollupConfigs.get(rollupConfigs.size() - 1).intervalMillis();
    }

    public static long getSafeRollupTime(long captureTime, long intervalMillis) {
        return (long) Math.floor(captureTime / (double) intervalMillis) * intervalMillis;
    }
}