Mercurial > dovecot > original-hg > dovecot-1.2

annotate src/plugins/fts-solr/fts-backend-solr.c @ 8492:ee1ecdda8a6b HEAD

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fts-solr: Keep last_uid field updated containing the mailbox's last added UID. Use the last_uid document for finding the last added UID instead of creating a query with rows=1&sort=uid. It should be faster this way.
author Timo Sirainen <tss@iki.fi>
date Sat, 29 Nov 2008 19:03:04 +0200
parents db78eab2ba5d
children 149c6ccc3df4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /* Copyright (c) 2006-2008 Dovecot authors, see the included COPYING file */
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2
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3 #include "lib.h"
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4 #include "array.h"
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5 #include "str.h"
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6 #include "mail-storage-private.h"
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7 #include "mail-namespace.h"
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8 #include "solr-connection.h"
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9 #include "fts-solr-plugin.h"
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10
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11 #include <curl/curl.h>
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12
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13 #define SOLR_CMDBUF_SIZE (1024*64)
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14 #define SOLR_MAX_ROWS 100000
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15
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16 struct solr_fts_backend_build_context {
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17 struct fts_backend_build_context ctx;
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18
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19 struct solr_connection_post *post;
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20 uint32_t prev_uid, uid_validity;
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21 string_t *cmd;
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22 bool headers;
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23 };
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24
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25 static struct solr_connection *solr_conn = NULL;
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26
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27 static void solr_quote_str(string_t *dest, const char *str)
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28 {
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29 solr_connection_quote_str(solr_conn, dest, str);
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30 }
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31
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32 static void
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33 xml_encode_data(string_t *dest, const unsigned char *data, unsigned int len)
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34 {
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35 unsigned int i;
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36
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37 for (i = 0; i < len; i++) {
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38 switch (data[i]) {
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39 case '&':
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40 str_append(dest, "&amp;");
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41 break;
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42 case '<':
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43 str_append(dest, "&lt;");
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44 break;
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45 case '>':
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46 str_append(dest, "&gt;");
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47 break;
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48 default:
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49 str_append_c(dest, data[i]);
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50 break;
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51 }
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52 }
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53 }
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54
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55 static void xml_encode(string_t *dest, const char *str)
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56 {
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57 xml_encode_data(dest, (const unsigned char *)str, strlen(str));
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58 }
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59
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60 static struct fts_backend *
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61 fts_backend_solr_init(struct mailbox *box ATTR_UNUSED)
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62 {
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63 const struct fts_solr_settings *set = &fts_solr_settings;
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64 struct fts_backend *backend;
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65
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66 if (solr_conn == NULL)
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67 solr_conn = solr_connection_init(set->url, set->debug);
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68
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69 backend = i_new(struct fts_backend, 1);
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70 *backend = fts_backend_solr;
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71
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72 if (set->substring_search)
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73 backend->flags |= FTS_BACKEND_FLAG_SUBSTRING_LOOKUPS;
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74 return backend;
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75 }
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76
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77 static void fts_backend_solr_deinit(struct fts_backend *backend)
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78 {
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79 i_free(backend);
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80 }
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81
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82 static int fts_backend_solr_get_last_uid_fallback(struct fts_backend *backend,
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83 uint32_t *last_uid_r)
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84 {
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85 struct mailbox_status status;
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86 ARRAY_TYPE(seq_range) uids;
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87 const struct seq_range *uidvals;
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88 unsigned int count;
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89 string_t *str;
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90
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91 str = t_str_new(256);
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92 str_append(str, "fl=uid&rows=1&sort=uid%20desc&q=");
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93
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94 mailbox_get_status(backend->box, STATUS_UIDVALIDITY, &status);
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95 str_printfa(str, "uidv:%u%%20box:", status.uidvalidity);
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96 solr_quote_str(str, backend->box->name);
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97 str_append(str, "%20user:");
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98 solr_quote_str(str, backend->box->storage->ns->user->username);
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99
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100 t_array_init(&uids, 1);
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101 if (solr_connection_select(solr_conn, str_c(str),
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102 NULL, NULL, &uids, NULL) < 0)
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103 return -1;
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104
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105 uidvals = array_get(&uids, &count);
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106 if (count == 0) {
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107 /* nothing indexed yet for this mailbox */
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108 *last_uid_r = 0;
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109 } else if (count == 1 && uidvals[0].seq1 == uidvals[0].seq2) {
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110 *last_uid_r = uidvals[0].seq1;
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111 } else {
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112 i_error("fts_solr: Last UID lookup returned multiple rows");
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113 return -1;
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114 }
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115 return 0;
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116 }
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117
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118 static int fts_backend_solr_get_last_uid(struct fts_backend *backend,
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119 uint32_t *last_uid_r)
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120 {
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121 struct mailbox_status status;
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122 ARRAY_TYPE(seq_range) uids;
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123 const struct seq_range *uidvals;
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124 unsigned int count;
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125 string_t *str;
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126
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127 str = t_str_new(256);
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128 str_append(str, "fl=uid&rows=1&q=last_uid:TRUE%20");
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129
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130 mailbox_get_status(backend->box, STATUS_UIDVALIDITY, &status);
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131 str_printfa(str, "uidv:%u%%20box:", status.uidvalidity);
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132 solr_quote_str(str, backend->box->name);
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133 str_append(str, "%20user:");
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134 solr_quote_str(str, backend->box->storage->ns->user->username);
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135
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136 t_array_init(&uids, 1);
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137 if (solr_connection_select(solr_conn, str_c(str),
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138 NULL, NULL, &uids, NULL) < 0)
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139 return -1;
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140
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141 uidvals = array_get(&uids, &count);
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142 if (count == 0) {
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143 /* either nothing is indexed or we're converting from an
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144 older database format without the last_uid fields */
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145 return fts_backend_solr_get_last_uid_fallback(backend,
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146 last_uid_r);
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147 } else if (count == 1 && uidvals[0].seq1 == uidvals[0].seq2) {
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148 *last_uid_r = uidvals[0].seq1;
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149 } else {
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150 i_error("fts_solr: Last UID lookup returned multiple rows");
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151 return -1;
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152 }
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153 return 0;
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154 }
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155
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156 static int
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157 fts_backend_solr_build_init(struct fts_backend *backend, uint32_t *last_uid_r,
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158 struct fts_backend_build_context **ctx_r)
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159 {
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160 struct solr_fts_backend_build_context *ctx;
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161 struct mailbox_status status;
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162
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163 *last_uid_r = (uint32_t)-1;
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164
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165 ctx = i_new(struct solr_fts_backend_build_context, 1);
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166 ctx->ctx.backend = backend;
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167 ctx->post = solr_connection_post_begin(solr_conn);
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168 ctx->cmd = str_new(default_pool, SOLR_CMDBUF_SIZE);
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169
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170 mailbox_get_status(backend->box, STATUS_UIDVALIDITY, &status);
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171 ctx->uid_validity = status.uidvalidity;
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172
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173 *ctx_r = &ctx->ctx;
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174 return 0;
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175 }
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176
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177 static void
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178 fts_backend_solr_add_doc_prefix(struct solr_fts_backend_build_context *ctx,
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179 uint32_t uid)
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180 {
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181 struct mailbox *box = ctx->ctx.backend->box;
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182
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183 str_printfa(ctx->cmd, "<doc>"
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184 "<field name=\"uid\">%u</field>"
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185 "<field name=\"uidv\">%u</field>",
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186 uid, ctx->uid_validity);
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187
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188 str_append(ctx->cmd, "<field name=\"box\">");
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189 xml_encode(ctx->cmd, box->name);
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190 str_append(ctx->cmd, "</field><field name=\"user\">");
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191 xml_encode(ctx->cmd, box->storage->ns->user->username);
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192 str_append(ctx->cmd, "</field>");
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193 }
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194
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195 static int
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196 fts_backend_solr_build_more(struct fts_backend_build_context *_ctx,
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197 uint32_t uid, const unsigned char *data,
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198 size_t size, bool headers)
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199 {
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200 struct solr_fts_backend_build_context *ctx =
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201 (struct solr_fts_backend_build_context *)_ctx;
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202 struct mailbox *box = _ctx->backend->box;
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203 string_t *cmd = ctx->cmd;
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204
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205 /* body comes first, then headers */
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206 if (ctx->prev_uid != uid) {
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207 /* uid changed */
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208 if (ctx->prev_uid == 0)
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209 str_append(cmd, "<add>");
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210 else
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211 str_append(cmd, "</field></doc>");
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212 ctx->prev_uid = uid;
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213
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214 fts_backend_solr_add_doc_prefix(ctx, uid);
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215 str_printfa(cmd, "<field name=\"id\">%u/%u/",
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216 uid, ctx->uid_validity);
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217 xml_encode(cmd, box->storage->ns->user->username);
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218 str_append_c(cmd, '/');
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219 xml_encode(cmd, box->name);
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220 str_append(cmd, "</field>");
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221
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222 ctx->headers = headers;
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223 if (headers) {
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224 str_append(cmd, "<field name=\"hdr\">");
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225 } else {
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226 str_append(cmd, "<field name=\"body\">");
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227 }
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228 } else if (headers && !ctx->headers) {
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229 str_append(cmd, "</field><field name=\"hdr\">");
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230 } else {
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231 i_assert(!(!headers && ctx->headers));
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232 }
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233
8000
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234 xml_encode_data(cmd, data, size);
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235 if (str_len(cmd) > SOLR_CMDBUF_SIZE-128) {
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236 solr_connection_post_more(ctx->post, str_data(cmd),
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237 str_len(cmd));
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238 str_truncate(cmd, 0);
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diff changeset
239 }
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240 return 0;
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241 }
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242
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243 static int
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244 fts_backed_solr_build_commit(struct solr_fts_backend_build_context *ctx)
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245 {
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246 struct mailbox *box = ctx->ctx.backend->box;
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247 int ret;
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248
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249 if (ctx->prev_uid == 0)
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250 return 0;
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251
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252 str_append(ctx->cmd, "</field></doc>");
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253
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254 /* Update the mailbox's last_uid field, replacing the existing
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255 document. Note that since there is no locking, it's possible that
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256 if another session is indexing at the same time, the last_uid value
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257 may shrink. This doesn't really matter, we'll simply do more work
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258 in future by reindexing some messages. */
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259 fts_backend_solr_add_doc_prefix(ctx, ctx->prev_uid);
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260 str_printfa(ctx->cmd, "<field name=\"last_uid\">TRUE</field>"
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261 "<field name=\"id\">L/%u/", ctx->uid_validity);
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262 xml_encode(ctx->cmd, box->storage->ns->user->username);
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263 str_append_c(ctx->cmd, '/');
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264 xml_encode(ctx->cmd, box->name);
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265 str_append(ctx->cmd, "</field></doc></add>");
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266
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267 solr_connection_post_more(ctx->post, str_data(ctx->cmd),
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268 str_len(ctx->cmd));
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269 ret = solr_connection_post_end(ctx->post);
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270 /* commit and wait until the documents we just indexed are
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271 visible to the following search */
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272 if (solr_connection_post(solr_conn, "<commit waitFlush=\"false\" "
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273 "waitSearcher=\"true\"/>") < 0)
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274 ret = -1;
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275 return ret;
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276 }
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277
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278 static int
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279 fts_backend_solr_build_deinit(struct fts_backend_build_context *_ctx)
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280 {
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281 struct solr_fts_backend_build_context *ctx =
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282 (struct solr_fts_backend_build_context *)_ctx;
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283 int ret;
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284
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285 ret = fts_backed_solr_build_commit(ctx);
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286 str_free(&ctx->cmd);
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287 i_free(ctx);
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288 return ret;
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289 }
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290
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291 static void
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292 fts_backend_solr_expunge(struct fts_backend *backend ATTR_UNUSED,
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293 struct mail *mail)
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294 {
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295 struct mailbox_status status;
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296
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297 mailbox_get_status(mail->box, STATUS_UIDVALIDITY, &status);
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298
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299 T_BEGIN {
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300 string_t *cmd;
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301
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302 cmd = t_str_new(256);
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303 str_printfa(cmd, "<delete><id>%u/%u/",
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304 mail->uid, status.uidvalidity);
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305 xml_encode(cmd, mail->box->storage->ns->user->username);
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306 str_append_c(cmd, '/');
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307 xml_encode(cmd, mail->box->name);
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308 str_append(cmd, "</id></delete>");
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309
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310 (void)solr_connection_post(solr_conn, str_c(cmd));
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311 } T_END;
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312 }
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313
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314 static void
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315 fts_backend_solr_expunge_finish(struct fts_backend *backend ATTR_UNUSED,
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316 struct mailbox *box ATTR_UNUSED,
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317 bool committed ATTR_UNUSED)
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318 {
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319 solr_connection_post(solr_conn,
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320 "<commit waitFlush=\"false\" waitSearcher=\"false\"/>");
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321 }
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322
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323 static int fts_backend_solr_lock(struct fts_backend *backend ATTR_UNUSED)
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324 {
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325 return 1;
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326 }
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327
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328 static void fts_backend_solr_unlock(struct fts_backend *backend ATTR_UNUSED)
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329 {
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330 }
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331
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332 static bool solr_virtual_uid_map(const char *mailbox, uint32_t uidvalidity,
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333 uint32_t *uid, void *context)
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334 {
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335 struct mailbox *box = context;
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336
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337 return mailbox_get_virtual_uid(box, mailbox, uidvalidity,
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338 *uid, uid);
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339 }
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340
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341 static int fts_backend_solr_lookup(struct fts_backend_lookup_context *ctx,
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342 ARRAY_TYPE(seq_range) *definite_uids,
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Timo Sirainen <tss@iki.fi>
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343 ARRAY_TYPE(seq_range) *maybe_uids,
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344 ARRAY_TYPE(fts_score_map) *scores)
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345 {
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346 struct mailbox *box = ctx->backend->box;
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347 const struct fts_backend_lookup_field *fields;
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348 unsigned int i, count;
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349 struct mailbox_status status;
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350 string_t *str;
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351 bool virtual;
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352
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353 virtual = strcmp(box->storage->name, "virtual") == 0;
8004
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354 mailbox_get_status(box, STATUS_UIDVALIDITY, &status);
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355
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356 str = t_str_new(256);
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357 if (!virtual) {
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diff changeset
358 str_printfa(str, "fl=uid,score&rows=%u&sort=uid%%20asc&q=",
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diff changeset
359 status.uidnext);
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360 } else {
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diff changeset
361 str_printfa(str, "fl=uid,score,box,uidv&rows=%u"
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diff changeset
362 "&sort=box%%20asc,uid%%20asc&q=",
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diff changeset
363 SOLR_MAX_ROWS);
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364 }
8004
6418d4c0ff16 fts: Added a new lookup API where the backend can look up all the fields
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diff changeset
365
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diff changeset
366 /* build a lucene search query from the fields */
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diff changeset
367 fields = array_get(&ctx->fields, &count);
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diff changeset
368 for (i = 0; i < count; i++) {
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diff changeset
369 if (i > 0)
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diff changeset
370 str_append(str, "%20");
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diff changeset
371
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diff changeset
372 if ((fields[i].flags & FTS_LOOKUP_FLAG_INVERT) != 0)
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diff changeset
373 str_append_c(str, '-');
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diff changeset
374
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diff changeset
375 if ((fields[i].flags & FTS_LOOKUP_FLAG_HEADER) == 0) {
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diff changeset
376 /* body only */
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diff changeset
377 i_assert((fields[i].flags & FTS_LOOKUP_FLAG_BODY) != 0);
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diff changeset
378 str_append(str, "body:");
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diff changeset
379 } else if ((fields[i].flags & FTS_LOOKUP_FLAG_BODY) == 0) {
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diff changeset
380 /* header only */
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diff changeset
381 str_append(str, "hdr:");
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diff changeset
382 } else {
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Timo Sirainen <tss@iki.fi>
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diff changeset
383 /* both */
6418d4c0ff16 fts: Added a new lookup API where the backend can look up all the fields
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diff changeset
384 str_append(str, "any:");
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diff changeset
385 }
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diff changeset
386 solr_quote_str(str, fields[i].key);
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387 }
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388
8004
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diff changeset
389 /* use a separate filter query for selecting the mailbox. it shouldn't
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diff changeset
390 affect the score and there could be some caching benefits too. */
8484
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diff changeset
391 str_append(str, "&fq=user:");
8109
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Timo Sirainen <tss@iki.fi>
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diff changeset
392 solr_quote_str(str, box->storage->ns->user->username);
7990
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diff changeset
393
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394 /* FIXME: limit what mailboxes to search with virtual storage */
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395 if (!virtual) {
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396 str_printfa(str, "%%20uidv:%u%%20box:", status.uidvalidity);
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397 solr_quote_str(str, box->name);
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398 }
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399
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400 array_clear(maybe_uids);
8484
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401 if (!virtual) {
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402 return solr_connection_select(solr_conn, str_c(str), NULL, NULL,
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403 definite_uids, scores);
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404 } else {
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405 return solr_connection_select(solr_conn, str_c(str),
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406 solr_virtual_uid_map, box,
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407 definite_uids, scores);
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408 }
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409 }
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410
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411 struct fts_backend fts_backend_solr = {
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412 MEMBER(name) "solr",
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413 MEMBER(flags) 0,
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414
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415 {
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416 fts_backend_solr_init,
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417 fts_backend_solr_deinit,
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418 fts_backend_solr_get_last_uid,
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419 fts_backend_solr_build_init,
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420 fts_backend_solr_build_more,
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421 fts_backend_solr_build_deinit,
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422 fts_backend_solr_expunge,
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423 fts_backend_solr_expunge_finish,
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424 fts_backend_solr_lock,
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425 fts_backend_solr_unlock,
8004
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426 NULL,
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427 NULL,
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428 fts_backend_solr_lookup
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429 }
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430 };