[21405] | 1 | /**********************************************************************
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| 2 | *
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| 3 | * jdbmnaiveclass.cpp --
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| 4 | * Copyright (C) 1999-2010 The New Zealand Digital Library Project
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| 5 | *
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| 6 | * A component of the Greenstone digital library software
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| 7 | * from the New Zealand Digital Library Project at the
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| 8 | * University of Waikato, New Zealand.
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| 9 | *
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| 10 | * This program is free software; you can redistribute it and/or modify
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| 11 | * it under the terms of the GNU General Public License as published by
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| 12 | * the Free Software Foundation; either version 2 of the License, or
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| 13 | * (at your option) any later version.
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| 14 | *
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| 15 | * This program is distributed in the hope that it will be useful,
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| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 18 | * GNU General Public License for more details.
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| 19 | *
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| 20 | * You should have received a copy of the GNU General Public License
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| 21 | * along with this program; if not, write to the Free Software
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| 22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 23 | *
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| 24 | *********************************************************************/
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| 25 |
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| 26 | #include "jdbmnaiveclass.h"
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| 27 | #include "gsdltools.h"
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| 28 | #include "gsdlunicode.h"
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| 29 | #include "fileutil.h"
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| 30 | #include "stdlib.h"
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| 31 | #include <cstring>
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| 32 |
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[21438] | 33 | #ifdef __WIN32__
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| 34 | //windows functions
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| 35 | #define popen _popen
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| 36 | #define pclose _pclose
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| 37 | #endif
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[21405] | 38 |
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| 39 | jdbmnaiveclass::jdbmnaiveclass(const text_t& gsdlhome)
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[22067] | 40 | : dbclass(gsdlhome)
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[21405] | 41 | {
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| 42 | gsdlhome_ = gsdlhome;
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| 43 |
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[21410] | 44 | text_t jdbm_jar = filename_cat(gsdlhome_,"lib","java","jdbm.jar");
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[21405] | 45 |
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| 46 | text_t jdbm_wrapper_jar = filename_cat(gsdlhome_,"bin","java","JDBMWrapper.jar");
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| 47 |
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| 48 | classpath_ = pathname_cat(jdbm_wrapper_jar,jdbm_jar);
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| 49 | classpath_cstr_ = to_utf8(classpath_).getcstr();
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| 50 | }
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| 51 |
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| 52 | jdbmnaiveclass::~jdbmnaiveclass()
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| 53 | {
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| 54 | delete [] classpath_cstr_;
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| 55 | }
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| 56 |
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| 57 |
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| 58 | // returns true if opened
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| 59 | bool jdbmnaiveclass::opendatabase (const text_t &filename, int mode, int num_retrys,
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| 60 | #ifdef __WIN32__
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| 61 | bool need_filelock
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| 62 | #else
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| 63 | bool
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| 64 | #endif
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| 65 | )
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| 66 | {
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| 67 | if (openfile_ == filename) {
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| 68 | return true;
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| 69 | }
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| 70 |
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| 71 | if (logout == NULL) {
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| 72 | logout = &cerr;
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| 73 | }
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| 74 |
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| 75 | // Map the DB mode value into equivalent JDBM 'must_exist' value
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| 76 | bool must_exist = true; // default
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| 77 |
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| 78 | if (mode == DB_WRITER_CREATE) {
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| 79 | must_exist = false;
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| 80 | }
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| 81 |
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| 82 | if (must_exist) {
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| 83 | // test that jdbm file exists
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| 84 |
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| 85 | if (!file_exists(filename)) {
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| 86 | outconvertclass text_t2ascii;
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| 87 | (*logout) << text_t2ascii
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| 88 | << "Error: JDBM filename " << filename << "does not exist\n";
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| 89 | return false;
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| 90 | }
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| 91 | }
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| 92 |
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| 93 | openfile_ = filename;
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| 94 |
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| 95 | // In naive implementation, no connection to database to open, so
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| 96 | // nothing else to do at this stage
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| 97 |
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| 98 | return true;
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| 99 | }
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| 100 |
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| 101 |
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| 102 | void jdbmnaiveclass::closedatabase ()
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| 103 | {
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| 104 | // nothing to do in naive implementation
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| 105 | }
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| 106 |
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| 107 | // returns file extension string
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| 108 | text_t jdbmnaiveclass::getfileextension ()
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| 109 | {
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| 110 | return ".jdb";
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| 111 | }
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| 112 |
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| 113 |
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| 114 | void jdbmnaiveclass::deletekey (const text_t &key)
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| 115 | {
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| 116 | if (openfile_.empty()) return;
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| 117 |
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| 118 | if (logout == NULL) {
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| 119 | logout = &cerr;
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| 120 | }
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| 121 |
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| 122 | // get a utf-8 encoded c string of the unicode key
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| 123 | char* key_cstr = (to_utf8(key)).getcstr();
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| 124 | if (key_cstr == NULL) {
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| 125 | (*logout) << "jdbmnaiveclass: out of memory" << endl;
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| 126 | return;
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| 127 | }
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| 128 |
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| 129 |
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| 130 | // delete the key<
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| 131 | char* openfile_cstr = (to_utf8(openfile_)).getcstr();
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| 132 |
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| 133 | char cmd[512];
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[24729] | 134 | sprintf(cmd,"java -cp \"%s\" JdbDel \"%s\" %s",classpath_cstr_,
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[21405] | 135 | openfile_cstr,key_cstr);
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| 136 |
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| 137 | delete [] openfile_cstr;
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| 138 |
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| 139 | int status = system(cmd);
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| 140 | if (status != 0 ) {
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| 141 | (*logout) << "jdbmnaiveclass: failed to run cmd: " << cmd << endl;
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| 142 | }
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| 143 |
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| 144 | // free up the key memory
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| 145 | delete [] key_cstr;
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| 146 | }
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| 147 |
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| 148 |
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| 149 |
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| 150 | // returns true on success
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| 151 | bool jdbmnaiveclass::getkeydata (const text_t& key, text_t &data)
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| 152 | {
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| 153 | if (openfile_.empty()) return false;
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| 154 |
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| 155 | if (logout == NULL) {
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| 156 | logout = &cerr;
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| 157 | }
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| 158 |
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| 159 | // get a utf-8 encoded c string of the unicode key
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| 160 | char* key_cstr = (to_utf8(key)).getcstr();
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| 161 | if (key_cstr == NULL) {
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| 162 | (*logout) << "jdbmnaiveclass: out of memory" << endl;
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| 163 |
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| 164 | return false;
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| 165 | }
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| 166 |
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| 167 | // fetch the result
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| 168 | char* openfile_cstr = (to_utf8(openfile_)).getcstr();
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| 169 |
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| 170 | char cmd[512];
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[24729] | 171 | sprintf(cmd,"java -cp \"%s\" JdbGet \"%s\" %s",classpath_cstr_,
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[21405] | 172 | openfile_cstr,key_cstr);
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| 173 |
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| 174 | delete [] openfile_cstr;
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| 175 |
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| 176 | FILE* PIN = popen(cmd,"r");
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| 177 |
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| 178 | if (PIN == NULL) {
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| 179 | (*logout) << "jdbmnaiveclass: failed to run cmd: " << cmd << endl;
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| 180 | }
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| 181 | else {
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| 182 | while (!feof(PIN)) {
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| 183 | char buf[256];
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| 184 | fgets(buf,256,PIN);
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| 185 |
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[22043] | 186 | /*
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| 187 | * debuging code
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[21405] | 188 |
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[22043] | 189 | cerr << "****## buf = " << buf << endl;
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[21405] | 190 |
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[22043] | 191 | cerr << "****## buf: ";
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| 192 |
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[21405] | 193 | int blen = strlen(buf);
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| 194 | for (int i=0; i< blen; i++) {
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| 195 | cerr << "(" << buf[i] << "," << (int)buf[i] << ") ";
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| 196 | }
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[22043] | 197 |
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[21405] | 198 | cerr << endl;
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[22043] | 199 | */ // *****
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[21405] | 200 |
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| 201 |
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| 202 | data.append(buf);
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| 203 | }
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| 204 |
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| 205 | }
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| 206 |
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| 207 | delete [] key_cstr;
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| 208 |
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[22043] | 209 | // cerr << "**** data before to_unicode = " << data << endl;
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[21405] | 210 |
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| 211 | data = to_uni(data); // convert to unicode
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| 212 |
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[22089] | 213 | pclose(PIN);
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| 214 |
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[21405] | 215 | return true;
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| 216 | }
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| 217 |
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| 218 |
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| 219 | // returns array of keys
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| 220 | text_tarray jdbmnaiveclass::getkeys ()
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| 221 | {
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| 222 | text_tarray keys;
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| 223 |
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| 224 | if (openfile_.empty()) return keys;
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| 225 |
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| 226 | if (logout == NULL) {
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| 227 | logout = &cerr;
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| 228 | }
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| 229 |
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| 230 | char* openfile_cstr = (to_utf8(openfile_)).getcstr();
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| 231 |
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| 232 | char cmd[512];
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[24729] | 233 | sprintf(cmd,"java -cp \"%s\" JdbKeys \"%s\"",classpath_cstr_,
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[21405] | 234 | openfile_cstr);
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| 235 |
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| 236 | delete [] openfile_cstr;
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| 237 |
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| 238 | FILE* PIN = popen(cmd,"r");
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| 239 |
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| 240 | if (PIN == NULL) {
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| 241 | (*logout) << "jdbmnaiveclass: failed to run cmd: " << cmd << endl;
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| 242 | }
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| 243 | else {
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| 244 | text_t key = "";
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| 245 |
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| 246 | while (!feof(PIN)) {
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| 247 |
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| 248 | char buf[256];
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| 249 | fgets(buf,256,PIN);
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| 250 | key.append(buf);
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| 251 |
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| 252 | keys.push_back(key);
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| 253 |
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| 254 | }
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| 255 | }
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| 256 |
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| 257 | pclose(PIN);
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| 258 |
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| 259 | return keys;
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| 260 | }
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| 261 |
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| 262 |
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| 263 | // returns true on success
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| 264 | bool jdbmnaiveclass::setkeydata (const text_t &key, const text_t &data)
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| 265 | {
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| 266 | if (openfile_.empty()) return false;
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| 267 |
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| 268 | if (logout == NULL) {
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| 269 | logout = &cerr;
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| 270 | }
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| 271 |
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| 272 | // get a utf-8 encoded c string of the unicode key
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| 273 | char* key_cstr = (to_utf8(key)).getcstr();
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| 274 |
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| 275 | if (key_cstr == NULL) {
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| 276 | (*logout) << "jdbmnaiveclass: out of memory" << endl;
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| 277 |
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| 278 | return false;
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| 279 | }
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| 280 |
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| 281 | char* data_cstr = (to_utf8(data)).getcstr();
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| 282 | if (data_cstr == NULL) {
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| 283 | (*logout) << "jdbmnaiveclass: out of memory" << endl;
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| 284 |
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| 285 | delete [] key_cstr;
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| 286 | return false;
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| 287 | }
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| 288 | int data_len = strlen(data_cstr);
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| 289 |
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| 290 | char* openfile_cstr = (to_utf8(openfile_)).getcstr();
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| 291 |
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| 292 | char cmd[512];
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[24729] | 293 | sprintf(cmd,"java -cp \"%s\" JdbSet \"%s\" %s %s",
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[21405] | 294 | classpath_cstr_,openfile_cstr,key_cstr,data_cstr);
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| 295 |
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| 296 | delete [] openfile_cstr;
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| 297 |
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| 298 | int status = system(cmd);
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| 299 | if (status != 0) {
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| 300 | (*logout) << "jdbmnaiveclass: failed to run cmd:"
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| 301 | << cmd << endl;
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| 302 | }
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| 303 |
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| 304 | delete [] key_cstr;
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| 305 | delete [] data_cstr;
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| 306 |
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| 307 | return (status == 0);
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| 308 | }
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| 309 |
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