1 | /*
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2 | * NzdlWrapper.java
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3 | * Copyright (C) 2001 New Zealand Digital Library Project
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4 | *
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5 | * This program is free software; you can redistribute it and/or modify
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6 | * it under the terms of the GNU General Public License as published by
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7 | * the Free Software Foundation; either version 2 of the License, or
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8 | * (at your option) any later version.
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9 | *
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10 | * This program is distributed in the hope that it will be useful,
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 | * GNU General Public License for more details.
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14 | *
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15 | * You should have received a copy of the GNU General Public License
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16 | * along with this program; if not, write to the Free Software
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17 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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18 | */
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19 |
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20 | //the package we're in
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21 | package org.nzdl.gsdl.service;
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22 |
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23 | import java.util.Map;
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24 | import java.util.Set;
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25 | import java.util.List;
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26 | import java.util.Date;
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27 | import java.io.Writer;
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28 | import java.io.FileWriter;
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29 |
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30 |
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31 | /**
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32 | * A Wrapper around an NzdlService object that adds logging functionality.
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33 | *
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34 | * @author Brett Sheeran ([email protected]) (comments)
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35 | * @author Stuart Yeates ([email protected])
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36 | * @version $Revision: 2278 $
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37 | */
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38 | public class NzdlLogWrapper
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39 | extends NzdlWrapper {
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40 |
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41 | Writer logFile = null;
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42 | String tag = "NzdlLogWrapper: ";
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43 | boolean calculateDiff = true;
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44 | boolean logBefore = false;
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45 | boolean logAfter = false;
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46 | Date whenCallStarted = null;
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47 |
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48 |
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49 | /**
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50 | * The bean constructor ...
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51 | */
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52 | public NzdlLogWrapper() {
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53 | }
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54 | /**
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55 | * The normal constructor
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56 | */
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57 | public NzdlLogWrapper(NzdlService nzdl, String logFilename,
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58 | String tag) {
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59 | super(nzdl);
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60 | this.tag = tag;
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61 | try {
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62 | Date date = new Date();
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63 | // the true is append ...
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64 | String dir = System.getProperties().getProperty("user.home");
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65 | String sep = System.getProperties().getProperty("file.separator");
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66 | logFile = new FileWriter(dir+sep+logFilename, true);
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67 | logFile.write(tag + "Log started at:" + date + " == " +
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68 | date.getTime() + "\n");
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69 | logFile.write(tag + "timestamps in milliseconds since January 1, 1970, 00:00:00 GMT \n");
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70 | logFile.flush();
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71 | } catch (Exception exception) {
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72 | System.err.println("unable to create log file:" + exception);
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73 | }
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74 | }
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75 |
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76 | protected void logBefore(String method) {
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77 | if (whenCallStarted != null)
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78 | throw new Error ("synchronisation required ! (whenCallStarted != null)");
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79 | whenCallStarted = new Date();
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80 | if (logBefore)
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81 | try {
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82 | logFile.write(this.tag + "before " + method + "() " +
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83 | whenCallStarted.getTime() + "\n");
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84 | logFile.flush();
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85 | } catch (Exception exception) {
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86 | System.err.println("unable to write log file:" + exception);
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87 | }
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88 | }
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89 |
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90 | protected void logAfter(String method) {
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91 | if (whenCallStarted == null)
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92 | throw new Error ("synchronisation required ! (whenCallStarted == null)");
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93 | Date now = new Date();
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94 | try {
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95 | if (logAfter)
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96 | logFile.write(this.tag + "after " + method + "() " +
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97 | whenCallStarted.getTime() + "\n");
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98 | if (calculateDiff)
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99 | logFile.write(this.tag + "time for " + method + "() " +
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100 | (now.getTime() -whenCallStarted.getTime()) + "ms\n");
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101 | logFile.flush();
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102 | } catch (Exception exception) {
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103 | System.err.println("unable to write log file:" + exception);
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104 | }
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105 | whenCallStarted = null;
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106 | }
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107 |
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108 | /**
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109 | * Allow the client to configure a CORBA server.
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110 | * @param key the parameter to be set.
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111 | * @param values what that parameter will be set to.
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112 | */
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113 | public void configure( String _key, Set _values ) {
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114 | logBefore("configure");
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115 | super.configure(_key, _values);
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116 | logAfter("configure");
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117 | }
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118 |
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119 | /**
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120 | * Obtain the set of collection names for a Greenstone library.
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121 | * @return A set of collection names in string format.
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122 | */
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123 | public Set getCollectionSet( ) {
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124 | logBefore("getCollectionSet");
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125 | Set result = super.getCollectionSet();
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126 | logAfter("getCollectionSet");
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127 | return result;
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128 | }
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129 |
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130 | /**
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131 | * Check if ORB knows of this collection.
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132 | * @param name the name of a collecion to be searched for.
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133 | * @return boolean <TT>true</TT> if collection is found, else <TT>false</TT>.
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134 | */
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135 | public boolean hasCollection( String _name ) {
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136 | logBefore("hasCollection");
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137 | boolean result = super.hasCollection(_name);
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138 | logAfter("hasCollection");
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139 | return result;
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140 | }
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141 |
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142 |
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143 | /**
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144 | * Check if ORB can communicate with of this collection.
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145 | * @param name the name of a collecion to be pinged.
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146 | * @return boolean <TT>true</TT> if collection returned ping, else
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147 | * <TT>false</TT>.
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148 | */
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149 | public boolean pingCollection( String _name ) {
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150 | logBefore("pingCollection");
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151 | boolean result = super.pingCollection(_name);
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152 | logAfter("pingCollection");
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153 | return result;
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154 | }
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155 |
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156 | /**
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157 | * Extract information on this collection into a
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158 | * {@link NzdlCollectionInfo NzdlCollectionInfo} object
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159 | * @param name the collection to be retrieved.
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160 | * @return an instance of
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161 | * {@link NzdlCollectionInfo NzdlCollectionInfo} containing data on a
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162 | * collection
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163 | */
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164 | public NzdlCollectionInfo getCollectionInfo( String _name ) {
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165 | logBefore(" getCollectionInfo");
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166 | NzdlCollectionInfo result = super.getCollectionInfo(_name);
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167 | logAfter(" getCollectionInfo");
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168 | return result;
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169 | }
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170 |
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171 | /**
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172 | * Returns the set of filters for the service object.
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173 | * @param name the collection name
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174 | * @return a set of strings that name the filters, for example
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175 | * BrowseFilter, QueryFilter and NullFilter.
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176 | */
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177 | public Set getFilterSet( String _name ) {
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178 | logBefore("getFilterSet");
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179 | Set result = super.getFilterSet(_name);
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180 | logAfter("getFilterSet");
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181 | return result;
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182 | }
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183 |
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184 | /**
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185 | * @param name the collection name
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186 | * @return the Set of (name, value) value pairs for all metadata
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187 | * associated with a collection
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188 | */
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189 | public Set getMetaTagSet( String _name ) {
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190 | logBefore("getMetaTagSet");
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191 | Set result = super.getMetaTagSet(_name);
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192 | logAfter("getMetaTagSet");
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193 | return result;
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194 | }
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195 |
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196 | /**
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197 | * Returns the Greenstone Markup Language (GML) text for a particular
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198 | * document from a collection.
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199 | * @param name the name of the collection.
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200 | * @param docID the document identity string
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201 | * @return the GML document in the form of a string.
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202 | */
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203 | public String getDocument( String _name, String _docID ) {
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204 | logBefore("getDocument");
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205 | String result = super.getDocument(_name, _docID);
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206 | logAfter("getDocument");
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207 | return result;
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208 | }
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209 |
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210 | /**
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211 | * Returns the set of value(s) for a metatag from a particular document.
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212 | * @param name collection name
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213 | * @param docID the document identifier.
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214 | * @param metaTag the metatag name such as: Title, Author, Date and Images.
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215 | * @return The set of value(s) for the requested metatag and document. In
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216 | * cases such as Title, Author, Date there will probably be only one value
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217 | * per document.
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218 | */
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219 | public Set getMetaData( String _name, String _docID, String _metaTag ) {
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220 | logBefore("getMetaData");
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221 | Set result = super.getMetaData( _name, _docID, _metaTag );
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222 | logAfter("getMetaData");
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223 | return result;
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224 | }
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225 |
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226 | /**
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227 | * Returns a map of value(s) for a metatag from a list of documents.
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228 | * @param name collection name
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229 | * @param docIDs a list of document identifier strings.
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230 | * @param metaTag the metatag name such as: Title, Author, Date and Images.
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231 | * @return The map of value(s) for the requested metatag and document. In
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232 | * cases such as Title, Author, Date there will probably be only one value
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233 | * per document.
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234 | */
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235 | public Map getMetaData( String _name, List _docIDs, String _metaTag ) {
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236 | logBefore("getMetaData");
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237 | Map result = super.getMetaData( _name, _docIDs, _metaTag );
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238 | logAfter("getMetaData");
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239 | return result;
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240 | }
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241 |
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242 | /**
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243 | * Services a {@link NzdlRequest NzdlRequest} to a collection and places
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244 | * the results into a {@link NzdlResponse NzdlResponse} object. <br>
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245 | * Pre: Created instances of NzdlRequest and NzdlResponse. <br>
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246 | * Post: Placed the result data into NzdlResponse object.
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247 | * @param name the collection name.
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248 | * @param request an instance of NzdlRequest with query data to be serviced
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249 | * @param response an instance of NzdlResponse. where the results of
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250 | * sevciving the query will be placed
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251 | */
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252 | public void service( String _name, NzdlRequest _request,
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253 | NzdlResponse _response ) {
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254 | logBefore("service");
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255 | super.service(_name,_request,_response);
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256 | logAfter("service");
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257 | }
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258 |
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259 | }
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