X-Git-Url: http://git.indexdata.com/?a=blobdiff_plain;f=src%2Fdatabase.c;h=1a450afe51be346e08be01149e22dc9e992bf038;hb=d65081fd86127344075a112002adbfa32ff88f11;hp=3824a67bd080ffd06be7f610c59875bed2ba2fcd;hpb=c9b8aa39dec714c08863e7fbb6c6a7821421f947;p=pazpar2-moved-to-github.git

diff --git a/src/database.c b/src/database.c
index 3824a67..1a450af 100644
--- a/src/database.c
+++ b/src/database.c
@@ -1,5 +1,5 @@
 /* This file is part of Pazpar2.
-   Copyright (C) 2006-2009 Index Data
+   Copyright (C) 2006-2011 Index Data
 
 Pazpar2 is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free
@@ -27,12 +27,14 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <yaz/log.h>
+#include <yaz/nmem.h>
 
-#include "pazpar2.h"
+#include "ppmutex.h"
+#include "session.h"
 #include "host.h"
+#include "pazpar2_config.h"
 #include "settings.h"
 #include "http.h"
-#include "zeerex.h"
 #include "database.h"
 
 #include <sys/types.h>
@@ -46,70 +48,76 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 #include <netinet/in.h>
 #endif
 
-static struct host *hosts = 0;  /* thread pr */
+enum pazpar2_database_criterion_type {
+    PAZPAR2_STRING_MATCH,
+    PAZPAR2_SUBSTRING_MATCH
+};
 
-static xmlDoc *get_explain_xml(struct conf_targetprofiles *targetprofiles,
-                               const char *id)
-{
-    struct stat st;
-    char *dir;
-    char path[256];
-    char ide[256];
-    if (targetprofiles->type != Targetprofiles_local)
-    {
-        yaz_log(YLOG_FATAL, "Only supports local type");
-        return 0;
-    }
-    dir = targetprofiles->src;
-    urlencode(id, ide);
-    sprintf(path, "%s/%s", dir, ide);
-    if (!stat(path, &st))
-        return xmlParseFile(path);
-    else
-        return 0;
-}
+struct database_criterion_value {
+    char *value;
+    struct database_criterion_value *next;
+};
+
+struct database_criterion {
+    char *name;
+    enum pazpar2_database_criterion_type type;
+    struct database_criterion_value *values;
+    struct database_criterion *next;
+};
+
+struct database_hosts {
+    struct host *hosts;
+    YAZ_MUTEX mutex;
+};
 
 // Create a new host structure for hostport
 static struct host *create_host(const char *hostport)
 {
     struct host *host;
+    char *db_comment;
 
     host = xmalloc(sizeof(struct host));
     host->hostport = xstrdup(hostport);
+    db_comment = strchr(host->hostport, '#');
+    if (db_comment)
+        *db_comment = '\0';
     host->connections = 0;
-    host->ipport = 0;
+    host->mutex = 0;
+
+    pazpar2_mutex_create(&host->mutex, "host");
+
+    yaz_cond_create(&host->cond_ready);
 
-    if (host_getaddrinfo(host))
-    {
-        xfree(host->hostport);
-        xfree(host);
-        return 0;
-    }
-    host->next = hosts;
-    hosts = host;
     return host;
 }
 
-static struct host *find_host(const char *hostport)
+static struct host *find_host(database_hosts_t hosts,
+                              const char *hostport)
 {
     struct host *p;
-    for (p = hosts; p; p = p->next)
+    yaz_mutex_enter(hosts->mutex);
+    for (p = hosts->hosts; p; p = p->next)
         if (!strcmp(p->hostport, hostport))
-            return p;
-    return create_host(hostport);
+            break;
+    if (!p)
+    {
+        p = create_host(hostport);
+        if (p)
+        {
+            p->next = hosts->hosts;
+            hosts->hosts = p;
+        }
+    }
+    yaz_mutex_leave(hosts->mutex);
+    return p;
 }
 
-int resolve_database(struct database *db)
+int resolve_database(struct conf_service *service, struct database *db)
 {
     if (db->host == 0)
     {
         struct host *host;
-        char *p;
-        char hostport[256];
-        strcpy(hostport, db->url);
-        if ((p = strchr(hostport, '/')))
-            *p = '\0';
-        if (!(host = find_host(hostport)))
+        if (!(host = find_host(service->server->database_hosts, db->url)))
             return -1;
         db->host = host;
     }
@@ -120,59 +128,43 @@ void resolve_databases(struct conf_service *service)
 {
     struct database *db = service->databases;
     for (; db; db = db->next)
-        resolve_database(db);
+        resolve_database(service, db);
 }
 
-static struct database *load_database(const char *id,
-    struct conf_service *service)
+struct database *new_database(const char *id, NMEM nmem)
 {
-    xmlDoc *doc = 0;
-    struct zr_explain *explain = 0;
     struct database *db;
-    char hostport[256];
-    char *dbname;
     struct setting *idset;
 
-    yaz_log(YLOG_LOG, "New database: %s", id);
-
-    if (service->targetprofiles 
-        && (doc = get_explain_xml(service->targetprofiles, id)))
-    {
-        explain = zr_read_xml(service->nmem, xmlDocGetRootElement(doc));
-        if (!explain)
-            return 0;
-    }
-
-    if (strlen(id) > 255)
-        return 0;
-    strcpy(hostport, id);
-    if ((dbname = strchr(hostport, '/')))
-        *(dbname++) = '\0';
-    else
-        dbname = "";
-    db = nmem_malloc(service->nmem, sizeof(*db));
+    db = nmem_malloc(nmem, sizeof(*db));
     memset(db, 0, sizeof(*db));
-    db->host = 0;
-    db->url = nmem_strdup(service->nmem, id);
-    db->databases = nmem_malloc(service->nmem, 2 * sizeof(char *));
-    db->databases[0] = nmem_strdup(service->nmem, dbname);
-    db->databases[1] = 0;
-    db->errors = 0;
-    db->explain = explain;
 
-    db->settings = 0;
+    db->url = nmem_strdup(nmem, id);
+    db->errors = 0;
+    db->host = 0;
 
-    db->settings = nmem_malloc(service->nmem, sizeof(struct settings*) * 
-                               settings_num(service));
-    db->num_settings = settings_num(service);
-    memset(db->settings, 0, sizeof(struct settings*) * settings_num(service));
-    idset = nmem_malloc(service->nmem, sizeof(*idset));
+    db->num_settings = PZ_MAX_EOF;
+    db->settings = nmem_malloc(nmem, sizeof(struct settings*) * 
+                               db->num_settings);
+    memset(db->settings, 0, sizeof(struct settings*) * db->num_settings);
+    idset = nmem_malloc(nmem, sizeof(*idset));
     idset->precedence = 0;
     idset->name = "pz:id";
     idset->target = idset->value = db->url;
     idset->next = 0;
     db->settings[PZ_ID] = idset;
+    db->next = 0;
+
+    return db;
+}
 
+static struct database *load_database(const char *id,
+                                      struct conf_service *service)
+{
+    struct database *db;
+
+    db = new_database(id, service->nmem);
+    
     db->next = service->databases;
     service->databases = db;
 
@@ -181,16 +173,12 @@ static struct database *load_database(const char *id,
 
 // Return a database structure by ID. Load and add to list if necessary
 // new==1 just means we know it's not in the list
-struct database *find_database(const char *id, int new,
-                               struct conf_service *service)
+struct database *find_database(const char *id, struct conf_service *service)
 {
     struct database *p;
-    if (!new)
-    {
-        for (p = service->databases; p; p = p->next)
-            if (!strcmp(p->url, id))
-                return p;
-    }
+    for (p = service->databases; p; p = p->next)
+        if (!strcmp(p->url, id))
+            return p;
     return load_database(id, service);
 }
 
@@ -267,9 +255,55 @@ static int match_criterion(struct setting **settings,
         return 0;
 }
 
-int database_match_criteria(struct setting **settings,
-                            struct conf_service *service,
-                            struct database_criterion *cl)
+// parses crit1=val1,crit2=val2|val3,...
+static struct database_criterion *create_database_criterion(NMEM m,
+                                                            const char *buf)
+{
+    struct database_criterion *res = 0;
+    char **values;
+    int num;
+    int i;
+
+    if (!buf || !*buf)
+        return 0;
+    nmem_strsplit(m, ",", buf,  &values, &num);
+    for (i = 0; i < num; i++)
+    {
+        char **subvalues;
+        int subnum;
+        int subi;
+        struct database_criterion *new = nmem_malloc(m, sizeof(*new));
+        char *eq;
+        if ((eq = strchr(values[i], '=')))
+            new->type = PAZPAR2_STRING_MATCH;
+        else if ((eq = strchr(values[i], '~')))
+            new->type = PAZPAR2_SUBSTRING_MATCH;
+        else
+        {
+            yaz_log(YLOG_WARN, "Missing equal-sign/tilde in filter");
+            return 0;
+        }
+        *(eq++) = '\0';
+        new->name = values[i];
+        nmem_strsplit(m, "|", eq, &subvalues, &subnum);
+        new->values = 0;
+        for (subi = 0; subi < subnum; subi++)
+        {
+            struct database_criterion_value *newv
+                = nmem_malloc(m, sizeof(*newv));
+            newv->value = subvalues[subi];
+            newv->next = new->values;
+            new->values = newv;
+        }
+        new->next = res;
+        res = new;
+    }
+    return res;
+}
+
+static int database_match_criteria(struct setting **settings,
+                                   struct conf_service *service,
+                                   struct database_criterion *cl)
 {
     for (; cl; cl = cl->next)
         if (!match_criterion(settings, service, cl))
@@ -282,11 +316,13 @@ int database_match_criteria(struct setting **settings,
 
 // Cycles through databases, calling a handler function on the ones for
 // which all criteria matched.
-int session_grep_databases(struct session *se, struct database_criterion *cl,
-        void (*fun)(void *context, struct session_database *db))
+int session_grep_databases(struct session *se, const char *filter,
+                           void (*fun)(struct session *se, struct session_database *db))
 {
     struct session_database *p;
+    NMEM nmem = nmem_create();
     int i = 0;
+    struct database_criterion *cl = create_database_criterion(nmem, filter);
 
     for (p = se->databases; p; p = p->next)
     {
@@ -300,18 +336,18 @@ int session_grep_databases(struct session *se, struct database_criterion *cl,
             i++;
         }
     }
+    nmem_destroy(nmem);
     return i;
 }
 
 int predef_grep_databases(void *context, struct conf_service *service,
-                          struct database_criterion *cl,
                           void (*fun)(void *context, struct database *db))
 {
     struct database *p;
     int i = 0;
 
     for (p = service->databases; p; p = p->next)
-        if (database_match_criteria(p->settings, service, cl))
+        if (database_match_criteria(p->settings, service, 0))
         {
             (*fun)(context, p);
             i++;
@@ -319,6 +355,34 @@ int predef_grep_databases(void *context, struct conf_service *service,
     return i;
 }
 
+database_hosts_t database_hosts_create(void)
+{
+    database_hosts_t p = xmalloc(sizeof(*p));
+    p->hosts = 0;
+    p->mutex = 0;
+    pazpar2_mutex_create(&p->mutex, "database");
+    return p;
+}
+
+void database_hosts_destroy(database_hosts_t *pp)
+{
+    if (*pp)
+    {
+        struct host *p = (*pp)->hosts;
+        while (p)
+        {
+            struct host *p_next = p->next;
+            yaz_mutex_destroy(&p->mutex);
+            yaz_cond_destroy(&p->cond_ready);
+            xfree(p->hostport);
+            xfree(p);
+            p = p_next;
+        }
+        yaz_mutex_destroy(&(*pp)->mutex);
+        xfree(*pp);
+    }
+}
+
 /*
  * Local variables:
  * c-basic-offset: 4