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annotate src/main/java/nl/cwi/monetdb/merovingian/SabaothDB.java @ 0:a5a898f6886c

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Copy of MonetDB java directory changeset e6e32756ad31.
author Sjoerd Mullender <sjoerd@acm.org>
date Wed, 21 Sep 2016 09:34:48 +0200 (2016-09-21)
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children 57978db4ee57 17fbaf2635bb
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1 /*
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2 * This Source Code Form is subject to the terms of the Mozilla Public
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3 * License, v. 2.0. If a copy of the MPL was not distributed with this
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4 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
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5 *
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6 * Copyright 1997 - July 2008 CWI, August 2008 - 2016 MonetDB B.V.
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7 */
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8
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9 package nl.cwi.monetdb.merovingian;
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10
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11 import java.util.*;
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12
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13 /**
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14 * Implementation of the Sabaoth C-struct as Java object.
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15 *
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16 * This Class implements a parser for the string representation of a
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17 * sabaoth information struct as returned by monetdbd.
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18 * <br />
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19 * Currently this class implements version 1 and 2 of the sabdb
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20 * serialisation.
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21 *
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22 * @version 2.0
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23 */
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24 public class SabaothDB {
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25 /** The name of the database */
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26 private String dbname;
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27 /** The URI how to connect to this database, or null if not
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28 * shared */
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29 private String uri;
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30 /** Whether or not the database is under maintenance */
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31 private boolean locked;
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32 /** The state of this database, one of SABdbState */
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33 private SABdbState state;
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34 /** A list of Strings representing the available scenarios of this
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35 * database */
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36 private String[] scenarios;
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37 /** The number of times this database was started */
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38 private int startCounter;
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39 /** The number of times this database was stopped */
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40 private int stopCounter;
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41 /** The number of times this database has crashed */
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42 private int crashCounter;
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43 /** The number of seconds this database was running on average */
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44 private long avgUptime;
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45 /** The maximum number of seconds this database was running */
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46 private long maxUptime;
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47 /** The minimum number of seconds this database was running */
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48 private long minUptime;
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49 /** The last time this database crashed, null if never */
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50 private Date lastCrash;
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51 /** The last time this database was started, null if never */
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52 private Date lastStart;
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53 /** The last time this database was stopped, null if never */
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54 private Date lastStop;
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55 /** Whether the last start was a crash */
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56 private boolean crashAvg1;
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57 /** Average of crashes in the last 10 start attempts */
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58 private double crashAvg10;
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59 /** Average of crashes in the last 30 start attempts */
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60 private double crashAvg30;
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61
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62 /** The serialised format header */
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63 private final String sabdbhdr = "sabdb:";
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64
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65 /** Sabaoth state enumeration */
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66 public enum SABdbState {
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67 SABdbIllegal (0),
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68 SABdbRunning (1),
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69 SABdbCrashed (2),
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70 SABdbInactive(3),
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71 SABdbStarting(4);
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72
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73 private final int cValue;
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74
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75 SABdbState(int cValue) {
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76 this.cValue = cValue;
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77 }
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78
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79 public int getcValue() {
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80 return(cValue);
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81 }
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82
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83 static SABdbState getInstance(int val) throws IllegalArgumentException {
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84 /* using this syntax because I can't find examples that do
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85 * it without it */
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86 for (SABdbState s : SABdbState.values()) {
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87 if (s.getcValue() == val) {
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88 return(s);
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89 }
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90 }
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91 throw new IllegalArgumentException("No such state with value: "
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92 + val);
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93 }
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94 }
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95
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96
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97 /**
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98 * Constructs a new SabaothDB object from a String.
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99 *
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100 * @param sabdb the serialised sabdb C-struct
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101 */
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102 public SabaothDB(String sabdb)
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103 throws IllegalArgumentException
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104 {
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105 if (sabdb == null)
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106 throw new IllegalArgumentException("String is null");
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107 if (!sabdb.startsWith(sabdbhdr))
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108 throw new IllegalArgumentException("String is not a Sabaoth struct");
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109 String[] parts = sabdb.split(":", 3);
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110 if (parts.length != 3)
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111 throw new IllegalArgumentException("String seems incomplete, " +
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112 "expected 3 components, only found " + parts.length);
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113 int protover;
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114 try {
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115 protover = Integer.parseInt(parts[1]);
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116 } catch (NumberFormatException e) {
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117 throw new IllegalArgumentException("Illegal protocol version: " +
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118 parts[1]);
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119 }
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120 if (protover != 1 && protover != 2)
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121 throw new IllegalArgumentException("Unsupported protocol version: " + protover);
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122 sabdb = parts[2];
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123 parts = sabdb.split(",", -2);
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124 if (protover == 1 && parts.length != 16 || protover == 2 && parts.length != 17)
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125 throw new IllegalArgumentException("String seems wrong, " +
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126 "unexpected number of components: " + parts.length);
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127
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128 /* Sabaoth sabdb struct */
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129 int pc = 0;
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130 this.dbname = parts[pc++];
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131 if (protover == 1) {
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132 this.uri = "<unknown>";
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133 int lastslash = this.dbname.lastIndexOf('/');
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134 if (lastslash == -1)
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135 throw new IllegalArgumentException("invalid path (needs slash): " + this.dbname);
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136 this.dbname = this.dbname.substring(lastslash + 1);
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137 } else {
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138 this.uri = parts[pc++];
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139 }
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140 this.locked = parts[pc++].equals("1") ? true : false;
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141 this.state = SABdbState.getInstance(Integer.parseInt(parts[pc++]));
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142 this.scenarios = parts[pc++].split("'");
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143 if (protover == 1) /* skip connections */
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144 pc++;
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145 /* Sabaoth sabuplog struct */
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146 this.startCounter = Integer.parseInt(parts[pc++]);
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147 this.stopCounter = Integer.parseInt(parts[pc++]);
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148 this.crashCounter = Integer.parseInt(parts[pc++]);
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149 this.avgUptime = Long.parseLong(parts[pc++]);
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150 this.maxUptime = Long.parseLong(parts[pc++]);
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151 this.minUptime = Long.parseLong(parts[pc++]);
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152 long t = Long.parseLong(parts[pc++]);
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153 if (t == -1) {
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154 this.lastCrash = null;
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155 } else {
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156 this.lastCrash = new Date(t * 1000);
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157 }
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158 t = Long.parseLong(parts[pc++]);
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159 if (t == -1) {
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160 this.lastStart = null;
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161 } else {
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162 this.lastStart = new Date(t * 1000);
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163 }
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164 if (protover != 1) {
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165 t = Long.parseLong(parts[pc++]);
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166 if (t == -1) {
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167 this.lastStop = null;
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168 } else {
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169 this.lastStop = new Date(t * 1000);
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170 }
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171 } else {
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172 this.lastStop = null;
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173 }
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174 this.crashAvg1 = parts[pc++].equals("1") ? true : false;
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175 this.crashAvg10 = Double.parseDouble(parts[pc++]);
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176 this.crashAvg30 = Double.parseDouble(parts[pc++]);
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177 }
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178
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179 public String getName() {
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180 return(dbname);
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181 }
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182
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183 public String getURI() {
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184 return(uri);
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185 }
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186
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187 public boolean isLocked() {
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188 return(locked);
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189 }
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190
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191 public SABdbState getState() {
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192 return(state);
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193 }
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194
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195 public String[] getScenarios() {
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196 return(scenarios);
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197 }
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198
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199 public int getStartCount() {
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200 return(startCounter);
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201 }
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202
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203 public int getStopCount() {
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204 return(stopCounter);
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205 }
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206
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207 public int getCrashCount() {
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208 return(crashCounter);
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209 }
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210
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211 public long getAverageUptime() {
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212 return(avgUptime);
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213 }
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214
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215 public long getMaximumUptime() {
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216 return(maxUptime);
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217 }
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218
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219 public long getMinimumUptime() {
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220 return(minUptime);
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221 }
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222
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223 public Date lastCrashed() {
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224 return(lastCrash);
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225 }
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226
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227 public Date lastStarted() {
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228 return(lastStart);
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229 }
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230
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231 public Date lastStopped() {
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232 return(lastStop);
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233 }
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234
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235 public boolean lastStartWasSuccessful() {
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236 return(crashAvg1);
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237 }
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238
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239 public double getCrashAverage10() {
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240 return(crashAvg10);
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241 }
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242
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243 public double getCrashAverage30() {
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244 return(crashAvg30);
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245 }
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246 }