Mercurial > dive4elements > framework

annotate artifact-database/src/main/java/de/intevation/artifactdatabase/DatabaseCleaner.java @ 310:63122b9dee1d

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Added interface to listen events in the backend. artifacts/trunk@2435 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Mon, 01 Aug 2011 09:41:40 +0000
parents f33401ea2a6c
children 31ee2b3b5a57
rev   line source
100
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1 /*
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2 * Copyright (c) 2010 by Intevation GmbH
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3 *
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4 * This program is free software under the LGPL (>=v2.1)
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5 * Read the file LGPL.txt coming with the software for details
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6 * or visit http://www.gnu.org/licenses/ if it does not exist.
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7 */
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8
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9 package de.intevation.artifactdatabase;
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10
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11 import de.intevation.artifacts.common.utils.Config;
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12 import de.intevation.artifacts.common.utils.StringUtils;
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13
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14 import de.intevation.artifacts.Artifact;
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16 import de.intevation.artifactdatabase.db.SQL;
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17 import de.intevation.artifactdatabase.db.DBConnection;
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18
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19 import java.sql.Connection;
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20 import java.sql.PreparedStatement;
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21 import java.sql.ResultSet;
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22 import java.sql.SQLException;
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23
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24 import java.util.ArrayList;
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25 import java.util.List;
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26 import java.util.Set;
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27 import java.util.Collections;
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29 import javax.sql.DataSource;
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30
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31 import org.apache.log4j.Logger;
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32
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33 /**
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34 * The database cleaner runs in background. It sleep for a configurable
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35 * while and when it wakes up it removes outdated artifacts from the
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36 * database. Outdated means that the the last access to the artifact
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37 * is longer aga then the time to live of this artifact.<br>
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38 * Before the artifact is finally removed from the system it is
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39 * revived one last time an the #endOfLife() method of the artifact
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40 * is called.<br>
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41 * The artifact implementations may e.g. use this to remove some extrenal
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42 * resources form the system.
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43 *
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44 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
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45 */
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46 public class DatabaseCleaner
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47 extends Thread
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48 {
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49 /**
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50 * Implementors of this interface are able to create a
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51 * living artifact from a given byte array.
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52 */
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53 public interface ArtifactReviver {
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54
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55 /**
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56 * Called to revive an artifact from a given byte array.
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57 * @param factoryName The name of the factory which
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58 * created this artifact.
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59 * @param bytes The bytes of the serialized artifact.
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60 * @return The revived artfiact.
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61 */
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62 Artifact reviveArtifact(String factoryName, byte [] bytes);
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63
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64 } // interface ArtifactReviver
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66 public interface LockedIdsProvider {
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67 Set<Integer> getLockedIds();
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68 } // interface LockedIdsProvider
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70 private static Logger logger = Logger.getLogger(DatabaseCleaner.class);
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71
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72 /**
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73 * Number of artifacts to be loaded at once. Used to
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74 * mitigate the problem of a massive denial of service
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75 * if too many artifacts have died since last cleanup.
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76 */
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77 public static final int MAX_ROWS = 50;
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79 public static final Set<Integer> EMPTY_IDS = Collections.emptySet();
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81 /**
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82 * The SQL statement to select the outdated artifacts.
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83 */
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84 public String SQL_OUTDATED;
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86 public String SQL_OUTDATED_COLLECTIONS;
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87 public String SQL_DELETE_COLLECTION_ITEMS;
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88 public String SQL_DELETE_COLLECTION;
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89
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90 /**
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91 * The SQL statement to delete some artifacts from the database.
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92 */
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93 public String SQL_DELETE_ARTIFACT;
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95 /**
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96 * XPath to figure out how long the cleaner should sleep between
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97 * cleanups. This is stored in the global configuration.
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98 */
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99 public static final String SLEEP_XPATH =
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100 "/artifact-database/cleaner/sleep-time/text()";
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102 /**
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103 * Default nap time between cleanups: 5 minutes.
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104 */
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105 public static final long SLEEP_DEFAULT =
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106 5 * 60 * 1000L; // 5 minutes
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108 /**
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109 * The configured nap time.
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110 */
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111 protected long sleepTime;
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113 /**
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114 * Internal locking mechanism to prevent some race conditions.
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115 */
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116 protected Object sleepLock = new Object();
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118 /**
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119 * A reference to the global context.
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120 */
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121 protected Object context;
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123 /**
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124 * A specialized Id filter which only delete some artifacts.
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125 * This is used to prevent deletion of living artifacts.
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126 */
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127 protected LockedIdsProvider lockedIdsProvider;
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128
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129 /**
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130 * The reviver used to bring the dead artifact on last
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131 * time back to live to call endOfLife() on them.
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132 */
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133 protected ArtifactReviver reviver;
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134
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135 protected DBConnection dbConnection;
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136
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137 /**
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138 * Default constructor.
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139 */
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140 public DatabaseCleaner() {
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141 }
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142
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143 /**
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144 * Constructor to create a cleaner with a given global context
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145 * and a given reviver.
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146 * @param context The global context of the artifact database
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147 * @param reviver The reviver to awake artifact one last time.
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148 */
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149 public DatabaseCleaner(Object context, ArtifactReviver reviver, DBConfig config) {
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150 setDaemon(true);
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151 sleepTime = getSleepTime();
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152 this.context = context;
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153 this.reviver = reviver;
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154 this.dbConnection = config.getDBConnection();
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155 setupSQL(config.getSQL());
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156 }
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157
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158 protected void setupSQL(SQL sql) {
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159 SQL_OUTDATED = sql.get("artifacts.outdated");
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160 SQL_OUTDATED_COLLECTIONS = sql.get("collections.outdated");
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161 SQL_DELETE_COLLECTION_ITEMS = sql.get("delete.collection.items");
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162 SQL_DELETE_COLLECTION = sql.get("delete.collection");
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163 SQL_DELETE_ARTIFACT = sql.get("artifacts.delete");
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164 }
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165
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166 /**
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167 * Sets the filter that prevents deletion of living artifacts.
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168 * Living artifacts are artifacts which are currently active
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169 * inside the artifact database. Deleting them in this state
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170 * would create severe internal problems.
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171 * @param filter
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172 */
230
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173 public void setLockedIdsProvider(LockedIdsProvider lockedIdsProvider) {
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174 this.lockedIdsProvider = lockedIdsProvider;
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175 }
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176
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177 /**
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178 * External hook to tell the cleaner to wake up before its
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179 * regular nap time is over. This is the case when the artifact
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180 * database finds an artifact which is already outdated.
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181 */
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182 public void wakeup() {
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183 synchronized (sleepLock) {
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184 sleepLock.notify();
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185 }
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186 }
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187
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188 /**
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189 * Fetches the sleep time from the global configuration.
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190 * @return the time to sleep between database cleanups in ms.
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191 */
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192 protected static long getSleepTime() {
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193 String sleepTimeString = Config.getStringXPath(SLEEP_XPATH);
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194
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195 if (sleepTimeString == null) {
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196 return SLEEP_DEFAULT;
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197 }
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198 try {
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199 // sleep at least one second
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200 return Math.max(Long.parseLong(sleepTimeString), 1000L);
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201 }
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202 catch (NumberFormatException nfe) {
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203 logger.warn("Cleaner sleep time defaults to " + SLEEP_DEFAULT);
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204 }
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205 return SLEEP_DEFAULT;
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206 }
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207
230
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208 private static final class IdData {
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209
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210 int id;
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211 byte [] data;
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212 String factoryName;
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213
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214 public IdData(int id, String factoryName, byte [] data) {
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215 this.id = id;
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216 this.factoryName = factoryName;
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217 this.data = data;
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218 }
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219 } // class IdData
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220
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221 /**
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222 * Cleaning is done in two phases. First we fetch a list of ids
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223 * of artifacts. If there are artifacts the cleaning is done.
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224 * Second we load the artifacts one by one one and call there
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225 * endOfLife() method. In this loop we remove them from database, too.
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226 * Each deletion is commited to ensure that a sudden failure
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227 * of the artifact database server does delete artifacts twice
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228 * or does not delete them at all. After this the first step
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229 * is repeated.
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230 */
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231 protected void cleanup() {
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232 logger.info("database cleanup");
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233
232
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234 Connection connection = null;
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235 PreparedStatement fetchIds = null;
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236 PreparedStatement stmnt = null;
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237 ResultSet result = null;
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238
232
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239 int removedCollections = 0;
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240 int removedArtifacts = 0;
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241
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242 DataSource dataSource = dbConnection.getDataSource();
231
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243
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244 Set<Integer> lockedIds = lockedIdsProvider != null
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245 ? lockedIdsProvider.getLockedIds()
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246 : EMPTY_IDS;
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247
238
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248 String questionMarks = lockedIds.isEmpty()
241
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249 ? "-666" // XXX: A bit hackish.
238
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250 : StringUtils.repeat('?', lockedIds.size(), ',');
231
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251
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252 try {
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253 connection = dataSource.getConnection();
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254 connection.setAutoCommit(false);
231
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255
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256 fetchIds = connection.prepareStatement(
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257 SQL_OUTDATED.replace("$LOCKED_IDS$", questionMarks));
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258
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259 // some dbms like derby do not support LIMIT
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260 // in SQL statements.
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261 fetchIds.setMaxRows(MAX_ROWS);
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262
232
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263 // Fetch ids of outdated collections
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264 stmnt = connection.prepareStatement(
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diff changeset
265 SQL_OUTDATED_COLLECTIONS.replace(
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diff changeset
266 "$LOCKED_IDS$", questionMarks));
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diff changeset
267
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diff changeset
268 // fill in the locked ids
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diff changeset
269 int idx = 1;
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parents: 231
diff changeset
270 for (Integer id: lockedIds) {
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diff changeset
271 fetchIds.setInt(idx, id);
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parents: 231
diff changeset
272 stmnt .setInt(idx, id);
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diff changeset
273 ++idx;
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parents: 231
diff changeset
274 }
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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parents: 231
diff changeset
275
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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diff changeset
276 ArrayList<Integer> cs = new ArrayList<Integer>();
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diff changeset
277 result = stmnt.executeQuery();
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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parents: 231
diff changeset
278 while (result.next()) {
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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diff changeset
279 cs.add(result.getInt(1));
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diff changeset
280 }
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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diff changeset
281
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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diff changeset
282 result.close(); result = null;
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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diff changeset
283 stmnt.close(); stmnt = null;
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diff changeset
284
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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diff changeset
285 // delete collection items
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diff changeset
286 stmnt = connection.prepareStatement(SQL_DELETE_COLLECTION_ITEMS);
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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parents: 231
diff changeset
287
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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parents: 231
diff changeset
288 for (Integer id: cs) {
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diff changeset
289 stmnt.setInt(1, id);
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diff changeset
290 stmnt.execute();
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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parents: 231
diff changeset
291 }
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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parents: 231
diff changeset
292
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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parents: 231
diff changeset
293 stmnt.close(); stmnt = null;
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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parents: 231
diff changeset
294
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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diff changeset
295 // delete collections
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diff changeset
296 stmnt = connection.prepareStatement(SQL_DELETE_COLLECTION);
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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parents: 231
diff changeset
297
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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parents: 231
diff changeset
298 for (Integer id: cs) {
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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diff changeset
299 stmnt.setInt(1, id);
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parents: 231
diff changeset
300 stmnt.execute();
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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parents: 231
diff changeset
301 }
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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parents: 231
diff changeset
302
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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parents: 231
diff changeset
303 stmnt.close(); stmnt = null;
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parents: 231
diff changeset
304 connection.commit();
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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parents: 231
diff changeset
305
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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parents: 231
diff changeset
306 removedCollections = cs.size(); cs = null;
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parents: 231
diff changeset
307
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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diff changeset
308 // remove artifacts
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parents: 231
diff changeset
309 stmnt = connection.prepareStatement(SQL_DELETE_ARTIFACT);
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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parents: 231
diff changeset
310
30
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
311 for (;;) {
230
fbd57d2eeaef Changed semantics of locked artifact ids.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 207
diff changeset
312 List<IdData> ids = new ArrayList<IdData>();
fbd57d2eeaef Changed semantics of locked artifact ids.
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parents: 207
diff changeset
313
30
88972c6daa4f Added a cleanup thread which periodically removes
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parents:
diff changeset
314 result = fetchIds.executeQuery();
88972c6daa4f Added a cleanup thread which periodically removes
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parents:
diff changeset
315
88972c6daa4f Added a cleanup thread which periodically removes
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parents:
diff changeset
316 while (result.next()) {
231
1ea35226a6de Database cleaner: Ignoring locked artifacts is now done on database level.
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parents: 230
diff changeset
317 ids.add(new IdData(
1ea35226a6de Database cleaner: Ignoring locked artifacts is now done on database level.
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parents: 230
diff changeset
318 result.getInt(1),
1ea35226a6de Database cleaner: Ignoring locked artifacts is now done on database level.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 230
diff changeset
319 result.getString(2),
1ea35226a6de Database cleaner: Ignoring locked artifacts is now done on database level.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 230
diff changeset
320 result.getBytes(3)));
30
88972c6daa4f Added a cleanup thread which periodically removes
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parents:
diff changeset
321 }
88972c6daa4f Added a cleanup thread which periodically removes
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parents:
diff changeset
322
88972c6daa4f Added a cleanup thread which periodically removes
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parents:
diff changeset
323 result.close(); result = null;
88972c6daa4f Added a cleanup thread which periodically removes
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parents:
diff changeset
324
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
325 if (ids.isEmpty()) {
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
326 break;
88972c6daa4f Added a cleanup thread which periodically removes
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parents:
diff changeset
327 }
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
328
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
329 for (int i = ids.size()-1; i >= 0; --i) {
230
fbd57d2eeaef Changed semantics of locked artifact ids.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 207
diff changeset
330 IdData idData = ids.get(i);
41
5e4bc24ea438 Made serilization more flexible. DB update required!!!
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parents: 32
diff changeset
331 Artifact artifact = reviver.reviveArtifact(
5e4bc24ea438 Made serilization more flexible. DB update required!!!
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parents: 32
diff changeset
332 idData.factoryName, idData.data);
30
88972c6daa4f Added a cleanup thread which periodically removes
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parents:
diff changeset
333 idData.data = null;
88972c6daa4f Added a cleanup thread which periodically removes
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parents:
diff changeset
334
232
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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diff changeset
335 stmnt.setInt(1, idData.id);
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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parents: 231
diff changeset
336 stmnt.execute();
30
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
337 connection.commit();
88972c6daa4f Added a cleanup thread which periodically removes
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parents:
diff changeset
338
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
339 try {
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
340 if (artifact != null) {
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
341 artifact.endOfLife(context);
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
342 }
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
343 }
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
344 catch (Exception e) {
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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diff changeset
345 logger.error(e.getLocalizedMessage(), e);
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
346 }
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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diff changeset
347 } // for all fetched data
88972c6daa4f Added a cleanup thread which periodically removes
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parents:
diff changeset
348
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
349 removedArtifacts += ids.size();
88972c6daa4f Added a cleanup thread which periodically removes
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parents:
diff changeset
350 }
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
351 }
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
352 catch (SQLException sqle) {
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
353 logger.error(sqle.getLocalizedMessage(), sqle);
88972c6daa4f Added a cleanup thread which periodically removes
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parents:
diff changeset
354 }
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
355 finally {
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
356 if (result != null) {
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
357 try { result.close(); }
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
358 catch (SQLException sqle) {}
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
359 }
232
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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parents: 231
diff changeset
360 if (stmnt != null) {
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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parents: 231
diff changeset
361 try { stmnt.close(); }
202b6ae2fcad Database cleaner: Removes outdated collections, too.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 231
diff changeset
362 catch (SQLException sqle) {}
202b6ae2fcad Database cleaner: Removes outdated collections, too.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 231
diff changeset
363 }
30
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
364 if (fetchIds != null) {
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
365 try { fetchIds.close(); }
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
366 catch (SQLException sqle) {}
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
367 }
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
368 if (connection != null) {
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
369 try { connection.close(); }
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
370 catch (SQLException sqle) {}
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
371 }
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
372 }
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
373
232
202b6ae2fcad Database cleaner: Removes outdated collections, too.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 231
diff changeset
374 logger.info("collections removed: " + removedCollections);
202b6ae2fcad Database cleaner: Removes outdated collections, too.
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parents: 231
diff changeset
375 logger.info("artifacts removed: " + removedArtifacts);
30
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
376 }
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
377
90
68285f7bc476 More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 80
diff changeset
378 /**
68285f7bc476 More javadoc.
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parents: 80
diff changeset
379 * The main code of the cleaner. It sleeps for the configured
68285f7bc476 More javadoc.
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parents: 80
diff changeset
380 * nap time, cleans up the database, sleeps again and so on.
68285f7bc476 More javadoc.
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parents: 80
diff changeset
381 */
68285f7bc476 More javadoc.
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parents: 80
diff changeset
382 @Override
30
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
383 public void run() {
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
384 logger.info("sleep time: " + sleepTime + "ms");
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
385 for (;;) {
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
386 cleanup();
48
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 47
diff changeset
387 long startTime = System.currentTimeMillis();
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 47
diff changeset
388
30
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
389 try {
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
390 synchronized (sleepLock) {
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
391 sleepLock.wait(sleepTime);
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
392 }
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
393 }
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
394 catch (InterruptedException ie) {
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
395 }
48
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 47
diff changeset
396
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 47
diff changeset
397 long stopTime = System.currentTimeMillis();
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 47
diff changeset
398
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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399 if (logger.isDebugEnabled()) {
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 47
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400 logger.debug("Cleaner slept " + (stopTime - startTime) + "ms");
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 47
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401 }
30
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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402 } // for (;;)
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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403 }
88972c6daa4f Added a cleanup thread which periodically removes
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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404 }
90
68285f7bc476 More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 80
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405 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org