WebUtils.java

/*
 * Copyright 2012 LinkedIn Corp.
 * 
 * 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 azkaban.utils;

import java.text.NumberFormat;

import org.joda.time.DateTime;
import org.joda.time.DurationFieldType;
import org.joda.time.ReadablePeriod;
import org.joda.time.format.DateTimeFormat;

import azkaban.executor.Status;

public class WebUtils {
	public static final String DATE_TIME_STRING = "YYYY-MM-dd HH:mm:ss";

	private static final long ONE_KB = 1024;
	private static final long ONE_MB = 1024 * ONE_KB;
	private static final long ONE_GB = 1024 * ONE_MB;
	private static final long ONE_TB = 1024 * ONE_GB;
	
	public String formatDate(long timeMS) {
		if (timeMS == -1) {
			return "-";
		}
		
		return DateTimeFormat.forPattern(DATE_TIME_STRING).print(timeMS);
	}
	
	public String formatDuration(long startTime, long endTime) {
		if (startTime == -1) {
			return "-";
		}
		
		long durationMS;
		if (endTime == -1) {
			durationMS = System.currentTimeMillis() - startTime;
		}
		else {
			durationMS = endTime - startTime;
		}
		
		long seconds = durationMS/1000;
		if (seconds < 60) {
			return seconds + " sec";
		}
		
		long minutes = seconds / 60;
		seconds %= 60;
		if (minutes < 60) {
			return minutes + "m " + seconds + "s";
		}
		
		long hours = minutes / 60;
		minutes %= 60;
		if (hours < 24) {
			return hours + "h " + minutes + "m " + seconds + "s";
		}
		
		long days = hours / 24;
		hours %= 24;
		return days + "d " + hours + "h " + minutes + "m";
	}
	
	public String formatStatus(Status status) {
		switch(status) {
			case SUCCEEDED:
				return "Success";
			case FAILED:
				return "Failed";
			case RUNNING:
				return "Running";
			case DISABLED:
				return "Disabled";
			case KILLED:
				return "Killed";
			case FAILED_FINISHING:
				return "Running w/Failure";
			case PREPARING:
				return "Preparing";
			case READY:
				return "Ready";
			case PAUSED:
				return "Paused";
			case SKIPPED:
				return "Skipped";
			default:
		}
		return "Unknown";
	}
	
	public String formatDateTime(DateTime dt) {
		return DateTimeFormat.forPattern(DATE_TIME_STRING).print(dt);
	}
	
	public String formatDateTime(long timestamp) {
		return formatDateTime(new DateTime(timestamp));
	}
	
	public String formatPeriod(ReadablePeriod period) {
		String periodStr = "null";

		if (period == null) {
			return periodStr;
		}

		if (period.get(DurationFieldType.years()) > 0) {
			int years = period.get(DurationFieldType.years());
			periodStr = years + " year(s)";
		}
		else if (period.get(DurationFieldType.months()) > 0) {
			int months = period.get(DurationFieldType.months());
			periodStr = months + " month(s)";
		}
		else if (period.get(DurationFieldType.weeks()) > 0) {
			int weeks = period.get(DurationFieldType.weeks());
			periodStr = weeks + " week(s)";
		}
		else if (period.get(DurationFieldType.days()) > 0) {
			int days = period.get(DurationFieldType.days());
			periodStr = days + " day(s)";
		}
		else if (period.get(DurationFieldType.hours()) > 0) {
			int hours = period.get(DurationFieldType.hours());
			periodStr = hours + " hour(s)";
		}
		else if (period.get(DurationFieldType.minutes()) > 0) {
			int minutes = period.get(DurationFieldType.minutes());
			periodStr = minutes + " minute(s)";
		}
		else if (period.get(DurationFieldType.seconds()) > 0) {
			int seconds = period.get(DurationFieldType.seconds());
			periodStr = seconds + " second(s)";
		}
		
		return periodStr;
	}
	
	public String extractNumericalId(String execId) {
		int index = execId.indexOf('.');
		int index2 = execId.indexOf('.', index+1);
		
		return execId.substring(0, index2);
	}
	
	public String displayBytes(long sizeBytes) {
		NumberFormat nf = NumberFormat.getInstance();
		nf.setMaximumFractionDigits(2);
		if(sizeBytes >= ONE_TB)
			return nf.format(sizeBytes / (double) ONE_TB) + " tb";
		else if(sizeBytes >= ONE_GB)
			return nf.format(sizeBytes / (double) ONE_GB) + " gb";
		else if(sizeBytes >= ONE_MB)
			return nf.format(sizeBytes / (double) ONE_MB) + " mb";
		else if(sizeBytes >= ONE_KB)
			return nf.format(sizeBytes / (double) ONE_KB) + " kb";
		else
			return sizeBytes + " B";
	}
}