ReplicaConfig.java

  1. /*
  2.  * Copyright (C) 2016, Google Inc.
  3.  * and other copyright owners as documented in the project's IP log.
  4.  *
  5.  * This program and the accompanying materials are made available
  6.  * under the terms of the Eclipse Distribution License v1.0 which
  7.  * accompanies this distribution, is reproduced below, and is
  8.  * available at http://www.eclipse.org/org/documents/edl-v10.php
  9.  *
  10.  * All rights reserved.
  11.  *
  12.  * Redistribution and use in source and binary forms, with or
  13.  * without modification, are permitted provided that the following
  14.  * conditions are met:
  15.  *
  16.  * - Redistributions of source code must retain the above copyright
  17.  *   notice, this list of conditions and the following disclaimer.
  18.  *
  19.  * - Redistributions in binary form must reproduce the above
  20.  *   copyright notice, this list of conditions and the following
  21.  *   disclaimer in the documentation and/or other materials provided
  22.  *   with the distribution.
  23.  *
  24.  * - Neither the name of the Eclipse Foundation, Inc. nor the
  25.  *   names of its contributors may be used to endorse or promote
  26.  *   products derived from this software without specific prior
  27.  *   written permission.
  28.  *
  29.  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  30.  * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
  31.  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  32.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  33.  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  34.  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  35.  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  36.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  37.  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  38.  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39.  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  40.  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  41.  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  42.  */

  44. package org.eclipse.jgit.internal.ketch;

  46. import static java.util.concurrent.TimeUnit.DAYS;
  47. import static java.util.concurrent.TimeUnit.HOURS;
  48. import static java.util.concurrent.TimeUnit.MILLISECONDS;
  49. import static java.util.concurrent.TimeUnit.MINUTES;
  50. import static java.util.concurrent.TimeUnit.SECONDS;
  51. import static org.eclipse.jgit.internal.ketch.KetchConstants.CONFIG_KEY_COMMIT;
  52. import static org.eclipse.jgit.internal.ketch.KetchConstants.CONFIG_KEY_SPEED;
  53. import static org.eclipse.jgit.internal.ketch.KetchConstants.CONFIG_KEY_TYPE;
  54. import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_REMOTE;

  56. import java.util.Collections;
  57. import java.util.HashMap;
  58. import java.util.Map;
  59. import java.util.concurrent.TimeUnit;
  60. import java.util.regex.Matcher;
  61. import java.util.regex.Pattern;

  63. import org.eclipse.jgit.internal.ketch.KetchReplica.CommitMethod;
  64. import org.eclipse.jgit.internal.ketch.KetchReplica.CommitSpeed;
  65. import org.eclipse.jgit.internal.ketch.KetchReplica.Participation;
  66. import org.eclipse.jgit.lib.Config;

  68. /**
  69.  * Configures a {@link org.eclipse.jgit.internal.ketch.KetchReplica}.
  70.  */
  71. public class ReplicaConfig {
  72.     /**
  73.      * Read a configuration from a config block.
  74.      *
  75.      * @param cfg
  76.      *            configuration to read.
  77.      * @param name
  78.      *            of the replica being configured.
  79.      * @return replica configuration for {@code name}.
  80.      */
  81.     public static ReplicaConfig newFromConfig(Config cfg, String name) {
  82.         return new ReplicaConfig().fromConfig(cfg, name);
  83.     }

  85.     private Participation participation = Participation.FULL;
  86.     private CommitMethod commitMethod = CommitMethod.ALL_REFS;
  87.     private CommitSpeed commitSpeed = CommitSpeed.BATCHED;
  88.     private long minRetry = SECONDS.toMillis(5);
  89.     private long maxRetry = MINUTES.toMillis(1);

  91.     /**
  92.      * Get participation of the replica in the system.
  93.      *
  94.      * @return participation of the replica in the system.
  95.      */
  96.     public Participation getParticipation() {
  97.         return participation;
  98.     }

  100.     /**
  101.      * Get how Ketch should apply committed changes.
  102.      *
  103.      * @return how Ketch should apply committed changes.
  104.      */
  105.     public CommitMethod getCommitMethod() {
  106.         return commitMethod;
  107.     }

  109.     /**
  110.      * Get how quickly should Ketch commit.
  111.      *
  112.      * @return how quickly should Ketch commit.
  113.      */
  114.     public CommitSpeed getCommitSpeed() {
  115.         return commitSpeed;
  116.     }

  118.     /**
  119.      * Returns the minimum wait delay before retrying a failure.
  120.      *
  121.      * @param unit
  122.      *            to get retry delay in.
  123.      * @return minimum delay before retrying a failure.
  124.      */
  125.     public long getMinRetry(TimeUnit unit) {
  126.         return unit.convert(minRetry, MILLISECONDS);
  127.     }

  129.     /**
  130.      * Returns the maximum wait delay before retrying a failure.
  131.      *
  132.      * @param unit
  133.      *            to get retry delay in.
  134.      * @return maximum delay before retrying a failure.
  135.      */
  136.     public long getMaxRetry(TimeUnit unit) {
  137.         return unit.convert(maxRetry, MILLISECONDS);
  138.     }

  140.     /**
  141.      * Update the configuration from a config block.
  142.      *
  143.      * @param cfg
  144.      *            configuration to read.
  145.      * @param name
  146.      *            of the replica being configured.
  147.      * @return {@code this}
  148.      */
  149.     public ReplicaConfig fromConfig(Config cfg, String name) {
  150.         participation = cfg.getEnum(
  151.                 CONFIG_KEY_REMOTE, name, CONFIG_KEY_TYPE,
  152.                 participation);
  153.         commitMethod = cfg.getEnum(
  154.                 CONFIG_KEY_REMOTE, name, CONFIG_KEY_COMMIT,
  155.                 commitMethod);
  156.         commitSpeed = cfg.getEnum(
  157.                 CONFIG_KEY_REMOTE, name, CONFIG_KEY_SPEED,
  158.                 commitSpeed);
  159.         minRetry = getMillis(cfg, name, "ketch-minRetry", minRetry); //$NON-NLS-1$
  160.         maxRetry = getMillis(cfg, name, "ketch-maxRetry", maxRetry); //$NON-NLS-1$
  161.         return this;
  162.     }

  164.     private static long getMillis(Config cfg, String name, String key,
  165.             long defaultValue) {
  166.         String valStr = cfg.getString(CONFIG_KEY_REMOTE, name, key);
  167.         if (valStr == null) {
  168.             return defaultValue;
  169.         }

  171.         valStr = valStr.trim();
  172.         if (valStr.isEmpty()) {
  173.             return defaultValue;
  174.         }

  176.         Matcher m = UnitMap.PATTERN.matcher(valStr);
  177.         if (!m.matches()) {
  178.             return defaultValue;
  179.         }

  181.         String digits = m.group(1);
  182.         String unitName = m.group(2).trim();
  183.         TimeUnit unit = UnitMap.UNITS.get(unitName);
  184.         if (unit == null) {
  185.             return defaultValue;
  186.         }

  188.         try {
  189.             if (digits.indexOf('.') == -1) {
  190.                 return unit.toMillis(Long.parseLong(digits));
  191.             }

  193.             double val = Double.parseDouble(digits);
  194.             return (long) (val * unit.toMillis(1));
  195.         } catch (NumberFormatException nfe) {
  196.             return defaultValue;
  197.         }
  198.     }

  200.     static class UnitMap {
  201.         static final Pattern PATTERN = Pattern
  202.                 .compile("^([1-9][0-9]*(?:\\.[0-9]*)?)\\s*(.*)$"); //$NON-NLS-1$

  204.         static final Map<String, TimeUnit> UNITS;

  206.         static {
  207.             Map<String, TimeUnit> m = new HashMap<>();
  208.             TimeUnit u = MILLISECONDS;
  209.             m.put("", u); //$NON-NLS-1$
  210.             m.put("ms", u); //$NON-NLS-1$
  211.             m.put("millis", u); //$NON-NLS-1$
  212.             m.put("millisecond", u); //$NON-NLS-1$
  213.             m.put("milliseconds", u); //$NON-NLS-1$

  215.             u = SECONDS;
  216.             m.put("s", u); //$NON-NLS-1$
  217.             m.put("sec", u); //$NON-NLS-1$
  218.             m.put("secs", u); //$NON-NLS-1$
  219.             m.put("second", u); //$NON-NLS-1$
  220.             m.put("seconds", u); //$NON-NLS-1$

  222.             u = MINUTES;
  223.             m.put("m", u); //$NON-NLS-1$
  224.             m.put("min", u); //$NON-NLS-1$
  225.             m.put("mins", u); //$NON-NLS-1$
  226.             m.put("minute", u); //$NON-NLS-1$
  227.             m.put("minutes", u); //$NON-NLS-1$

  229.             u = HOURS;
  230.             m.put("h", u); //$NON-NLS-1$
  231.             m.put("hr", u); //$NON-NLS-1$
  232.             m.put("hrs", u); //$NON-NLS-1$
  233.             m.put("hour", u); //$NON-NLS-1$
  234.             m.put("hours", u); //$NON-NLS-1$

  236.             u = DAYS;
  237.             m.put("d", u); //$NON-NLS-1$
  238.             m.put("day", u); //$NON-NLS-1$
  239.             m.put("days", u); //$NON-NLS-1$

  241.             UNITS = Collections.unmodifiableMap(m);
  242.         }

  244.         private UnitMap() {
  245.         }
  246.     }
  247. }
Created with JaCoCo 0.8.4.201905082037