org.usergrid.persistence.CounterResolution Maven / Gradle / Ivy

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Core services for Usergrid system.

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/*******************************************************************************
 * Copyright 2012 Apigee Corporation
 * 
 * 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.usergrid.persistence;

public enum CounterResolution {
	ALL(0), MINUTE(1), FIVE_MINUTES(5), HALF_HOUR(30), HOUR(60), SIX_HOUR(
			60 * 6), HALF_DAY(60 * 12), DAY(60 * 24), WEEK(60 * 24 * 7), MONTH(
			60 * 24 * (365 / 12));

	private final long interval;

	CounterResolution(long minutes) {
		interval = minutes * 60 * 1000;
	}

	public long interval() {
		return interval;
	}

	public long round(long timestamp) {
		if (interval == 0) {
			return 1;
		}
		return (timestamp / interval) * interval;
	}

	public long next(long timestamp) {
		return round(timestamp) + interval;
	}

	public static CounterResolution fromOrdinal(int i) {
		if ((i < 0) || (i >= CounterResolution.values().length)) {
			throw new IndexOutOfBoundsException("Invalid ordinal");
		}
		return CounterResolution.values()[i];
	}

	public static CounterResolution fromMinutes(int m) {
		m = m * 60 * 1000;
		for (int i = CounterResolution.values().length - 1; i >= 0; i--) {
			if (CounterResolution.values()[i].interval <= m) {
				return CounterResolution.values()[i];
			}
		}
		return ALL;
	}

	public static CounterResolution fromString(String s) {
		if (s == null) {
			return ALL;
		}
		try {
			return CounterResolution.valueOf(s.toUpperCase());
		} catch (IllegalArgumentException e) {
		}
		try {
			return fromMinutes(Integer.valueOf(s));
		} catch (NumberFormatException e) {
		}
		return ALL;
	}
}