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annotate src/main/java/org/monetdb/merovingian/SabaothDB.java @ 973:32f246853ec4 default tip

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Optimisation, call connection.mapClobAsVarChar() and connection.mapBlobAsVarBinary() outside the for-loop, as it does not change.
author Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
date Thu, 10 Apr 2025 19:26:59 +0200 (8 days ago)
parents d416e9b6b3d0
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * SPDX-License-Identifier: MPL-2.0
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3 *
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4 * This Source Code Form is subject to the terms of the Mozilla Public
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5 * License, v. 2.0. If a copy of the MPL was not distributed with this
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6 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
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7 *
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8 * Copyright 2024, 2025 MonetDB Foundation;
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9 * Copyright August 2008 - 2023 MonetDB B.V.;
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10 * Copyright 1997 - July 2008 CWI.
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11 */
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12
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f523727db392 Moved Java classes from packages starting with nl.cwi.monetdb.* to package org.monetdb.*
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13 package org.monetdb.merovingian;
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14
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17fbaf2635bb Expand import java.*.* statements
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15 import java.util.Date;
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16
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17 /**
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18 * Implementation of the Sabaoth C-struct as Java object.
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19 *
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20 * This Class implements a parser for the string representation of a
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21 * sabaoth information struct as returned by monetdbd.
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22 *
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23 * Currently this class implements version 1 and 2 of the sabdb
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24 * serialisation.
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25 *
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26 * @version 2.0
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27 */
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28 public class SabaothDB {
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29 /** The name of the database */
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30 private String dbname;
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31 /** The URI how to connect to this database, or null if not
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32 * shared */
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33 private String uri;
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34 /** Whether or not the database is under maintenance */
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35 private boolean locked;
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36 /** The state of this database, one of SABdbState */
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37 private SABdbState state;
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38 /** A list of Strings representing the available scenarios of this
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39 * database */
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40 private String[] scenarios;
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41 /** The number of times this database was started */
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42 private int startCounter;
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43 /** The number of times this database was stopped */
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44 private int stopCounter;
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45 /** The number of times this database has crashed */
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46 private int crashCounter;
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47 /** The number of seconds this database was running on average */
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48 private long avgUptime;
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49 /** The maximum number of seconds this database was running */
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50 private long maxUptime;
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51 /** The minimum number of seconds this database was running */
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52 private long minUptime;
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53 /** The last time this database crashed, null if never */
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54 private Date lastCrash;
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55 /** The last time this database was started, null if never */
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56 private Date lastStart;
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57 /** The last time this database was stopped, null if never */
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58 private Date lastStop;
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59 /** Whether the last start was a crash */
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60 private boolean crashAvg1;
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61 /** Average of crashes in the last 10 start attempts */
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62 private double crashAvg10;
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63 /** Average of crashes in the last 30 start attempts */
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64 private double crashAvg30;
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65
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66 /** The serialised format header */
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67 private final String sabdbhdr = "sabdb:";
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68
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69 /** Sabaoth state enumeration */
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70 public enum SABdbState {
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71 SABdbIllegal (0),
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72 SABdbRunning (1),
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73 SABdbCrashed (2),
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74 SABdbInactive(3),
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75 SABdbStarting(4);
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76
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77 private final int cValue;
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78
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79 SABdbState(int cValue) {
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80 this.cValue = cValue;
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81 }
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82
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83 public int getcValue() {
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84 return(cValue);
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85 }
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86
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87 static SABdbState getInstance(int val) throws IllegalArgumentException {
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88 /* using this syntax because I can't find examples that do
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89 * it without it */
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90 for (SABdbState s : SABdbState.values()) {
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91 if (s.getcValue() == val) {
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92 return(s);
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93 }
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94 }
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95 throw new IllegalArgumentException("No such state with value: "
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96 + val);
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97 }
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98 }
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99
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100 /**
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101 * Constructs a new SabaothDB object from a String.
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102 *
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103 * @param sabdb the serialised sabdb C-struct
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104 */
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105 public SabaothDB(String sabdb)
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106 throws IllegalArgumentException
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107 {
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108 if (sabdb == null)
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109 throw new IllegalArgumentException("String is null");
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110 if (!sabdb.startsWith(sabdbhdr))
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111 throw new IllegalArgumentException("String is not a Sabaoth struct");
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112 String[] parts = sabdb.split(":", 3);
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113 if (parts.length != 3)
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114 throw new IllegalArgumentException("String seems incomplete, " +
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115 "expected 3 components, only found " + parts.length);
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116 int protover;
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117 try {
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118 protover = Integer.parseInt(parts[1]);
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119 } catch (NumberFormatException e) {
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120 throw new IllegalArgumentException("Illegal protocol version: " +
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121 parts[1]);
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122 }
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123 if (protover != 1 && protover != 2)
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124 throw new IllegalArgumentException("Unsupported protocol version: " + protover);
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125 sabdb = parts[2];
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126 parts = sabdb.split(",", -2);
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127 if (protover == 1 && parts.length != 16 || protover == 2 && parts.length != 17)
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128 throw new IllegalArgumentException("String seems wrong, " +
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129 "unexpected number of components: " + parts.length);
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130
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131 /* Sabaoth sabdb struct */
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132 int pc = 0;
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133 this.dbname = parts[pc++];
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134 if (protover == 1) {
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135 this.uri = "<unknown>";
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136 int lastslash = this.dbname.lastIndexOf('/');
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137 if (lastslash == -1)
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138 throw new IllegalArgumentException("invalid path (needs slash): " + this.dbname);
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139 this.dbname = this.dbname.substring(lastslash + 1);
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140 } else {
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141 this.uri = parts[pc++];
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142 }
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143 this.locked = parts[pc++].equals("1") ? true : false;
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144 this.state = SABdbState.getInstance(Integer.parseInt(parts[pc++]));
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145 this.scenarios = parts[pc++].split("'");
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146 if (protover == 1) /* skip connections */
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147 pc++;
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148 /* Sabaoth sabuplog struct */
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149 this.startCounter = Integer.parseInt(parts[pc++]);
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150 this.stopCounter = Integer.parseInt(parts[pc++]);
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151 this.crashCounter = Integer.parseInt(parts[pc++]);
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152 this.avgUptime = Long.parseLong(parts[pc++]);
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153 this.maxUptime = Long.parseLong(parts[pc++]);
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154 this.minUptime = Long.parseLong(parts[pc++]);
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155 long t = Long.parseLong(parts[pc++]);
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156 if (t == -1) {
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157 this.lastCrash = null;
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158 } else {
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159 this.lastCrash = new Date(t * 1000);
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160 }
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161 t = Long.parseLong(parts[pc++]);
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162 if (t == -1) {
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163 this.lastStart = null;
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164 } else {
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165 this.lastStart = new Date(t * 1000);
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166 }
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167 if (protover != 1) {
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168 t = Long.parseLong(parts[pc++]);
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169 if (t == -1) {
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170 this.lastStop = null;
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171 } else {
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172 this.lastStop = new Date(t * 1000);
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173 }
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174 } else {
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175 this.lastStop = null;
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176 }
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177 this.crashAvg1 = parts[pc++].equals("1") ? true : false;
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178 this.crashAvg10 = Double.parseDouble(parts[pc++]);
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179 this.crashAvg30 = Double.parseDouble(parts[pc++]);
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180 }
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181
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182 public String getName() {
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183 return(dbname);
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184 }
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185
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186 public String getURI() {
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187 return(uri);
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188 }
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189
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190 public boolean isLocked() {
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191 return(locked);
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192 }
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193
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194 public SABdbState getState() {
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195 return(state);
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196 }
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197
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198 public String[] getScenarios() {
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199 return(scenarios);
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200 }
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201
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202 public int getStartCount() {
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203 return(startCounter);
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204 }
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205
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206 public int getStopCount() {
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207 return(stopCounter);
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208 }
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209
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210 public int getCrashCount() {
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211 return(crashCounter);
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212 }
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213
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214 public long getAverageUptime() {
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215 return(avgUptime);
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216 }
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217
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218 public long getMaximumUptime() {
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219 return(maxUptime);
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220 }
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221
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222 public long getMinimumUptime() {
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223 return(minUptime);
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224 }
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225
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226 public Date lastCrashed() {
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227 return(lastCrash);
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228 }
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229
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230 public Date lastStarted() {
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231 return(lastStart);
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232 }
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233
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234 public Date lastStopped() {
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235 return(lastStop);
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236 }
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237
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238 public boolean lastStartWasSuccessful() {
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239 return(crashAvg1);
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240 }
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241
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diff changeset
242 public double getCrashAverage10() {
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diff changeset
243 return(crashAvg10);
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diff changeset
244 }
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245
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246 public double getCrashAverage30() {
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diff changeset
247 return(crashAvg30);
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248 }
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249 }