[9] | 1 | #include <iostream> |
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| 2 | #include <string> |
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| 3 | #include <sstream> |
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| 4 | #include <iomanip> |
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| 5 | #include "gdbm_pool.h" |
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| 6 | #include "gdbm.h" |
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| 7 | #include <string.h> |
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| 8 | #include <stdlib.h> |
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| 9 | #include "wutils.h" |
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| 10 | #include <algorithm> |
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| 11 | #include <vector> |
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| 12 | #include "stopos.h" |
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| 13 | |
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| 14 | #include "stopos_pool.h" |
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| 15 | gdbm_pool::gdbm_pool() |
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| 16 | { |
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| 17 | } |
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| 18 | |
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| 19 | gdbm_pool::~gdbm_pool() |
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| 20 | { |
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| 21 | } |
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| 22 | |
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| 23 | int gdbm_pool::create_db(void) |
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| 24 | { |
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| 25 | int rc; |
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| 26 | |
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| 27 | rc = this->purge_db(); |
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| 28 | if (rc != 0) |
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| 29 | return rc; |
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| 30 | |
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| 31 | // The db_name can be composed of parts separeted with '/' |
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| 32 | // we try to create this path until the last '/' |
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| 33 | |
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| 34 | size_t p = this->sdb_name.find_last_of('/'); |
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| 35 | rc = mkdir_p(this->sdb_name.substr(0,p+1),0755); |
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| 36 | if (rc != 0) |
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| 37 | return CREATEERROR; |
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| 38 | |
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| 39 | this->dbf = gdbm_open(this->db_name,0,GDBM_NEWDB|this->sync,0644,0); |
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| 40 | |
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| 41 | if (this->dbf == 0) |
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| 42 | return this->OPENERROR; |
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| 43 | |
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| 44 | this->status.init(); |
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| 45 | |
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| 46 | rc = put_status(); |
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| 47 | |
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| 48 | if (rc != 0) |
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| 49 | { |
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| 50 | this->close_db(); |
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| 51 | return this->STOREERROR; |
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| 52 | } |
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| 53 | this->close_db(); |
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| 54 | return 0; |
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| 55 | } |
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| 56 | |
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| 57 | int gdbm_pool::purge_db(void) |
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| 58 | { |
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| 59 | if (this->db_name == 0) |
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| 60 | return NOFILENAME; |
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| 61 | |
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| 62 | this->close_db(); |
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| 63 | |
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| 64 | unlink(db_name); |
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| 65 | |
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| 66 | return 0; |
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| 67 | } |
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| 68 | |
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| 69 | int gdbm_pool::get_status(void) |
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| 70 | { |
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| 71 | datum key, content; |
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| 72 | // create record with starting key |
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| 73 | key.dptr = str_to_charp(this->statuskey.str()); |
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| 74 | key.dsize = strlen(key.dptr)+1; |
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| 75 | |
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| 76 | content=gdbm_fetch(this->dbf,key); |
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| 77 | free(key.dptr); |
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| 78 | if (content.dptr == 0) |
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| 79 | return FETCHERROR; |
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| 80 | this->status = statusrecord(content.dptr,dbsep); |
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| 81 | |
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| 82 | free(content.dptr); |
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| 83 | return 0; |
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| 84 | } |
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| 85 | |
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| 86 | int gdbm_pool::put_status(void) |
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| 87 | { |
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| 88 | datum key, content; |
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| 89 | key.dptr = str_to_charp(this->statuskey.str()); |
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| 90 | key.dsize = strlen(key.dptr)+1; |
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| 91 | std::string buf; |
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| 92 | |
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| 93 | buf = this->status.str(dbsep); |
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| 94 | |
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| 95 | content.dptr = str_to_charp(buf); |
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| 96 | content.dsize = strlen(content.dptr) + 1; |
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| 97 | |
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| 98 | int rc = gdbm_store(this->dbf, key, content, GDBM_REPLACE); |
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| 99 | |
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| 100 | free(content.dptr); |
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| 101 | free(key.dptr); |
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| 102 | return rc; |
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| 103 | } |
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| 104 | |
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| 105 | int gdbm_pool::open_db(void) |
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| 106 | { |
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| 107 | int rc; |
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| 108 | |
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| 109 | if (this->db_open) |
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| 110 | return 0; |
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| 111 | |
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| 112 | if (this->db_name == 0) |
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| 113 | return this->NOFILENAME; |
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| 114 | |
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| 115 | char rw='w'; |
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| 116 | switch (rw) |
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| 117 | { |
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| 118 | case 'r': |
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| 119 | do |
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| 120 | { |
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| 121 | dbf = gdbm_open(this->db_name,0,GDBM_READER,0644,0); |
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| 122 | if (dbf == 0) |
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| 123 | usleep(1000); |
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| 124 | } |
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| 125 | while (dbf == 0); |
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| 126 | break; |
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| 127 | case 'w': |
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| 128 | do |
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| 129 | { |
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| 130 | dbf = gdbm_open(this->db_name,0,GDBM_WRCREAT|this->sync,0644,0); |
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| 131 | if (dbf == 0) |
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| 132 | usleep(1000); |
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| 133 | } |
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| 134 | while (dbf == 0); |
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| 135 | break; |
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| 136 | default: |
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| 137 | break; |
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| 138 | } |
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| 139 | this->db_open = 1; |
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| 140 | return 0; |
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| 141 | } |
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| 142 | |
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| 143 | int gdbm_pool::close_db(void) |
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| 144 | { |
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| 145 | if (db_open) |
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| 146 | gdbm_close(this->dbf); |
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| 147 | |
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| 148 | this->db_open = 0; |
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| 149 | |
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| 150 | return 0; |
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| 151 | } |
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| 152 | |
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| 153 | int gdbm_pool::get_record(datarecord &r, const stopos_key &k) |
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| 154 | { |
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| 155 | datum key,content; |
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| 156 | key.dptr = str_to_charp(k.str()); |
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| 157 | key.dsize = strlen(key.dptr) + 1; |
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| 158 | content=gdbm_fetch(this->dbf,key); |
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| 159 | free(key.dptr); |
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| 160 | if (content.dptr == 0) |
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| 161 | return this->FETCHERROR; |
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| 162 | |
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| 163 | r = datarecord(content.dptr,dbsep); |
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| 164 | |
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| 165 | free(content.dptr); |
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| 166 | |
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| 167 | return 0; |
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| 168 | } |
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| 169 | |
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| 170 | int gdbm_pool::put_record(datarecord &r, const stopos_key &k) |
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| 171 | { |
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| 172 | datum key, content; |
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| 173 | key.dptr = str_to_charp(k.str()); |
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| 174 | key.dsize = strlen(key.dptr) + 1; |
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| 175 | std::string buf; |
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| 176 | |
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| 177 | buf = r.str(dbsep); |
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| 178 | |
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| 179 | content.dptr = str_to_charp(buf); |
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| 180 | content.dsize = strlen(content.dptr)+ 1; |
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| 181 | int rc = gdbm_store(this->dbf, key, content, GDBM_REPLACE); |
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| 182 | free(content.dptr); |
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| 183 | free(key.dptr); |
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| 184 | return rc; |
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| 185 | } |
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| 186 | |
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| 187 | |
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| 188 | int gdbm_pool::remove_record(const stopos_key &key) |
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| 189 | { |
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| 190 | datum k; |
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| 191 | int rc; |
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| 192 | k.dptr = str_to_charp(key.str()); |
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| 193 | k.dsize = strlen(k.dptr) + 1; |
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| 194 | |
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| 195 | rc = gdbm_delete(this->dbf,k); |
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| 196 | if (rc !=0) |
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| 197 | return NOTFOUND; |
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| 198 | return 0; |
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| 199 | } |
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| 200 | |
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| 201 | |
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| 202 | bool comprecord(std::string a, std::string b) |
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| 203 | { |
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| 204 | int ia = StringToNumber<int>(a); |
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| 205 | int ib = StringToNumber<int>(b); |
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| 206 | |
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| 207 | return ia < ib; |
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| 208 | } |
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| 209 | |
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| 210 | void gdbm_pool::dump_db(void) |
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| 211 | { |
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| 212 | datum key, content,key1; |
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| 213 | key = gdbm_firstkey(this->dbf); |
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| 214 | std::vector <std::string> vec; |
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| 215 | while ( key.dptr) |
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| 216 | { |
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| 217 | content = gdbm_fetch(this->dbf,key); |
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| 218 | vec.push_back(std::string(key.dptr)+":"+std::string(content.dptr)); |
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| 219 | key1 = gdbm_nextkey(dbf,key); |
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| 220 | free(key.dptr); |
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| 221 | free(content.dptr); |
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| 222 | key = key1; |
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| 223 | } |
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| 224 | std::sort(vec.begin(), vec.end(), ::comprecord); |
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| 225 | std::vector<std::string>::iterator it; |
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| 226 | for (it=vec.begin(); it!=vec.end(); ++it) |
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| 227 | std::cerr << " " << *it << std::endl; |
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| 228 | } |
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| 229 | |
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