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comparison servlet/src/digilib/io/DocuDirCache.java @ 282:87dca7119596

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Servlet version 1.22b1 - more fast searching (hopefully all working now) - some simple synchronisation - some reshuffling of methods to eliminate cruft
author robcast
date Fri, 15 Oct 2004 16:59:47 +0200
parents b21915a3fc24
children dd1e681924bf
comparison
equal deleted inserted replaced
281:60a064f27d25 282:87dca7119596
38 */ 38 */
39 public class DocuDirCache { 39 public class DocuDirCache {
40 40
41 /** general logger for this class */ 41 /** general logger for this class */
42 Logger logger = Logger.getLogger(this.getClass()); 42 Logger logger = Logger.getLogger(this.getClass());
43
43 /** HashMap of directories */ 44 /** HashMap of directories */
44 Map map = null; 45 Map map = null;
46
45 /** names of base directories */ 47 /** names of base directories */
46 String[] baseDirNames = null; 48 String[] baseDirNames = null;
49
47 /** array of allowed file classes (image/text) */ 50 /** array of allowed file classes (image/text) */
48 private int[] fileClasses = null; 51 private int[] fileClasses = null;
52
49 /** number of files in the whole cache (approximate) */ 53 /** number of files in the whole cache (approximate) */
50 long numFiles = 0; 54 long numFiles = 0;
55
51 /** number of cache hits */ 56 /** number of cache hits */
52 long hits = 0; 57 long hits = 0;
58
53 /** number of cache misses */ 59 /** number of cache misses */
54 long misses = 0; 60 long misses = 0;
61
55 /** use safe (but slow) indexing */ 62 /** use safe (but slow) indexing */
56 boolean safeDirIndex = false; 63 boolean safeDirIndex = false;
64
57 /** the root directory element */ 65 /** the root directory element */
58 public static Directory ROOT = null; 66 public static Directory ROOT = null;
59 67
60 /** 68 /**
61 * Constructor with array of base directory names and file classes. 69 * Constructor with array of base directory names and file classes.
62 * 70 *
63 * @param bd 71 * @param bd
64 * base directory names 72 * base directory names
65 */ 73 */
66 public DocuDirCache(String[] bd, int[] fileClasses, DigilibConfiguration dlConfig) { 74 public DocuDirCache(String[] bd, int[] fileClasses,
75 DigilibConfiguration dlConfig) {
67 baseDirNames = bd; 76 baseDirNames = bd;
68 map = new HashMap(); 77 map = new HashMap();
69 this.fileClasses = fileClasses; 78 this.fileClasses = fileClasses;
70 safeDirIndex = dlConfig.getAsBoolean("safe-dir-index"); 79 safeDirIndex = dlConfig.getAsBoolean("safe-dir-index");
71 } 80 }
81
72 /** 82 /**
73 * Constructor with array of base directory names. 83 * Constructor with array of base directory names.
74 * 84 *
75 * @param bd 85 * @param bd
76 * base directory names 86 * base directory names
110 /** 120 /**
111 * Add a directory to the cache and check its parents. 121 * Add a directory to the cache and check its parents.
112 * 122 *
113 * @param newDir 123 * @param newDir
114 */ 124 */
115 public void putDir(DocuDirectory newDir) { 125 public synchronized void putDir(DocuDirectory newDir) {
116 put(newDir); 126 put(newDir);
117 String parent = FileOps.parent(newDir.getDirName()); 127 String parent = FileOps.parent(newDir.getDirName());
118 if (parent != "") { 128 if (parent != "") {
119 // check the parent in the cache 129 // check the parent in the cache
120 DocuDirectory pd = (DocuDirectory) map.get(parent); 130 DocuDirectory pd = (DocuDirectory) map.get(parent);
128 } 138 }
129 139
130 /** 140 /**
131 * Get a list with all children of a directory. 141 * Get a list with all children of a directory.
132 * 142 *
133 * Returns a List of DocuDirectory's. Returns an empty List if the 143 * Returns a List of DocuDirectory's. Returns an empty List if the directory
134 * directory has no children. If recurse is false then only direct children 144 * has no children. If recurse is false then only direct children are
135 * are returned. 145 * returned.
136 * 146 *
137 * @param dirname 147 * @param dirname
138 * @param recurse 148 * @param recurse
139 * find all children and their children. 149 * find all children and their children.
140 * @return 150 * @return
156 } 166 }
157 return l; 167 return l;
158 } 168 }
159 169
160 /** 170 /**
161 * Returns the DocuDirent with the pathname <code>fn</code> and the 171 * Returns the DocuDirent with the pathname <code>fn</code> and the index
162 * index <code>in</code> and the class <code>fc</code>. 172 * <code>in</code> and the class <code>fc</code>.
163 * 173 *
164 * If <code>fn</code> is a file then the corresponding DocuDirent is 174 * If <code>fn</code> is a file then the corresponding DocuDirent is
165 * returned and the index is ignored. 175 * returned and the index is ignored.
166 * 176 *
167 * @param fn 177 * @param fn
168 * digilib pathname 178 * digilib pathname
169 * @param in 179 * @param in
170 * file index 180 * file index
171 * @param fc 181 * @param fc
172 * file class 182 * file class
173 * @return 183 * @return
174 */ 184 */
175 public DocuDirent getFile(String fn, int in, int fc) { 185 public DocuDirent getFile(String fn, int in, int fc) {
176 DocuDirectory dd; 186 DocuDirectory dd;
177 // file number is 1-based, vector index is 0-based 187 // file number is 1-based, vector index is 0-based