ODBC resource manager. More...
#include <sql.h>
#include <sqlext.h>
#include <sqltypes.h>
#include "asterisk/linkedlists.h"
#include "asterisk/strings.h"
Go to the source code of this file.
Data Structures | |
struct | odbc_cache_tables::_columns |
struct | odbc_cache_columns |
struct | odbc_cache_tables |
struct | odbc_obj |
ODBC container. More... | |
Defines | |
#define | ast_odbc_release_table(ptr) if (ptr) { AST_RWLIST_UNLOCK(&(ptr)->columns); } |
Release a table returned from ast_odbc_find_table. | |
Enumerations | |
enum | { RES_ODBC_SANITY_CHECK = (1 << 0), RES_ODBC_INDEPENDENT_CONNECTION = (1 << 1) } |
Flags for use with. More... | |
enum | odbc_status { ODBC_SUCCESS = 0, ODBC_FAIL = -1 } |
Functions | |
SQLRETURN | ast_odbc_ast_str_SQLGetData (struct ast_str **buf, int pmaxlen, SQLHSTMT StatementHandle, SQLUSMALLINT ColumnNumber, SQLSMALLINT TargetType, SQLLEN *StrLen_or_Ind) |
Wrapper for SQLGetData to use with dynamic strings. | |
int | ast_odbc_backslash_is_escape (struct odbc_obj *obj) |
Checks if the database natively supports backslash as an escape character. | |
int | ast_odbc_clear_cache (const char *database, const char *tablename) |
Remove a cache entry from memory. | |
SQLHSTMT | ast_odbc_direct_execute (struct odbc_obj *obj, SQLHSTMT(*exec_cb)(struct odbc_obj *obj, void *data), void *data) |
Executes an non prepared statement and returns the resulting statement handle. | |
struct odbc_cache_columns * | ast_odbc_find_column (struct odbc_cache_tables *table, const char *colname) |
Find a column entry within a cached table structure. | |
struct odbc_cache_tables * | ast_odbc_find_table (const char *database, const char *tablename) |
Find or create an entry describing the table specified. | |
SQLHSTMT | ast_odbc_prepare_and_execute (struct odbc_obj *obj, SQLHSTMT(*prepare_cb)(struct odbc_obj *obj, void *data), void *data) |
Prepares, executes, and returns the resulting statement handle. | |
void | ast_odbc_release_obj (struct odbc_obj *obj) |
Releases an ODBC object previously allocated by odbc_request_obj() | |
struct odbc_obj * | ast_odbc_request_obj (const char *name, int check) |
struct odbc_obj * | ast_odbc_request_obj2 (const char *name, struct ast_flags flags) |
Retrieves a connected ODBC object. | |
struct odbc_obj * | ast_odbc_retrieve_transaction_obj (struct ast_channel *chan, const char *objname) |
Retrieve a stored ODBC object, if a transaction has been started. | |
int | ast_odbc_sanity_check (struct odbc_obj *obj) |
Checks an ODBC object to ensure it is still connected. | |
int | ast_odbc_smart_execute (struct odbc_obj *obj, SQLHSTMT stmt) |
Executes a prepared statement handle. |
ODBC resource manager.
Definition in file res_odbc.h.
#define ast_odbc_release_table | ( | ptr | ) | if (ptr) { AST_RWLIST_UNLOCK(&(ptr)->columns); } |
Release a table returned from ast_odbc_find_table.
Definition at line 212 of file res_odbc.h.
Referenced by update2_prepare(), and update_odbc().
anonymous enum |
Flags for use with.
Definition at line 39 of file res_odbc.h.
{ RES_ODBC_SANITY_CHECK = (1 << 0), RES_ODBC_INDEPENDENT_CONNECTION = (1 << 1), };
enum odbc_status |
Definition at line 36 of file res_odbc.h.
{ ODBC_SUCCESS=0, ODBC_FAIL=-1} odbc_status;
SQLRETURN ast_odbc_ast_str_SQLGetData | ( | struct ast_str ** | buf, |
int | pmaxlen, | ||
SQLHSTMT | StatementHandle, | ||
SQLUSMALLINT | ColumnNumber, | ||
SQLSMALLINT | TargetType, | ||
SQLLEN * | StrLen_or_Ind | ||
) |
Wrapper for SQLGetData to use with dynamic strings.
buf | Address of the pointer to the ast_str structure. |
pmaxlen | The maximum size of the resulting string, or 0 for no limit. |
StatementHandle | The statement handle from which to retrieve data. |
ColumnNumber | Column number (1-based offset) for which to retrieve data. |
TargetType | The SQL constant indicating what kind of data is to be retrieved (usually SQL_CHAR) |
StrLen_or_Ind | A pointer to a length indicator, specifying the total length of data. |
Definition at line 679 of file res_odbc.c.
References ast_str_buffer(), ast_str_make_space(), ast_str_size(), and ast_str_update().
Referenced by acf_odbc_read(), and cli_odbc_read().
{ SQLRETURN res; if (pmaxlen == 0) { if (SQLGetData(StatementHandle, ColumnNumber, TargetType, ast_str_buffer(*buf), 0, StrLen_or_Ind) == SQL_SUCCESS_WITH_INFO) { ast_str_make_space(buf, *StrLen_or_Ind + 1); } } else if (pmaxlen > 0) { ast_str_make_space(buf, pmaxlen); } res = SQLGetData(StatementHandle, ColumnNumber, TargetType, ast_str_buffer(*buf), ast_str_size(*buf), StrLen_or_Ind); ast_str_update(*buf); return res; }
int ast_odbc_backslash_is_escape | ( | struct odbc_obj * | obj | ) |
Checks if the database natively supports backslash as an escape character.
obj | The ODBC object |
Definition at line 1048 of file res_odbc.c.
References odbc_class::backslash_is_escape, and odbc_obj::parent.
Referenced by odbc_log(), realtime_multi_odbc(), and realtime_odbc().
{ return obj->parent->backslash_is_escape; }
int ast_odbc_clear_cache | ( | const char * | database, |
const char * | tablename | ||
) |
Remove a cache entry from memory.
database | Name of an ODBC class (used to ensure like-named tables in different databases are not confused) |
tablename | Tablename for which a cached record should be removed |
0 | if the cache entry was removed, or -1 if no matching entry was found. |
Definition at line 551 of file res_odbc.c.
References AST_LIST_REMOVE_CURRENT, AST_RWLIST_TRAVERSE_SAFE_BEGIN, AST_RWLIST_TRAVERSE_SAFE_END, AST_RWLIST_UNLOCK, AST_RWLIST_WRLOCK, odbc_cache_tables::connection, destroy_table_cache(), odbc_class::list, and odbc_cache_tables::table.
{ struct odbc_cache_tables *tableptr; AST_RWLIST_WRLOCK(&odbc_tables); AST_RWLIST_TRAVERSE_SAFE_BEGIN(&odbc_tables, tableptr, list) { if (strcmp(tableptr->connection, database) == 0 && strcmp(tableptr->table, tablename) == 0) { AST_LIST_REMOVE_CURRENT(list); destroy_table_cache(tableptr); break; } } AST_RWLIST_TRAVERSE_SAFE_END AST_RWLIST_UNLOCK(&odbc_tables); return tableptr ? 0 : -1; }
SQLHSTMT ast_odbc_direct_execute | ( | struct odbc_obj * | obj, |
SQLHSTMT(*)(struct odbc_obj *obj, void *data) | exec_cb, | ||
void * | data | ||
) |
Executes an non prepared statement and returns the resulting statement handle.
obj | The ODBC object |
exec_cb | A function callback, which, when called, should return a statement handle with result columns bound. |
data | A parameter to be passed to the exec_cb parameter function, indicating which statement handle is to be prepared. |
a | statement handle |
NULL | on error |
Definition at line 568 of file res_odbc.c.
References ast_log(), ast_odbc_sanity_check(), odbc_class::dsn, LOG_WARNING, odbc_class::name, odbc_obj::parent, and odbc_obj::tx.
Referenced by acf_odbc_read(), acf_odbc_write(), cli_odbc_read(), cli_odbc_write(), and odbc_log().
{ int attempt; SQLHSTMT stmt; for (attempt = 0; attempt < 2; attempt++) { stmt = exec_cb(obj, data); if (stmt) { break; } else if (obj->tx) { ast_log(LOG_WARNING, "Failed to execute, but unable to reconnect, as we're transactional.\n"); break; } else if (attempt == 0) { ast_log(LOG_WARNING, "SQL Execute error! Verifying connection to %s [%s]...\n", obj->parent->name, obj->parent->dsn); } if (!ast_odbc_sanity_check(obj)) { break; } } return stmt; }
struct odbc_cache_columns* ast_odbc_find_column | ( | struct odbc_cache_tables * | table, |
const char * | colname | ||
) | [read] |
Find a column entry within a cached table structure.
table | Cached table structure, as returned from ast_odbc_find_table() |
colname | The column name requested |
A | structure describing the column type, or NULL, if the column is not found. |
Definition at line 540 of file res_odbc.c.
References AST_RWLIST_TRAVERSE, odbc_cache_tables::columns, odbc_class::list, and odbc_cache_columns::name.
Referenced by update2_prepare(), and update_odbc().
{ struct odbc_cache_columns *col; AST_RWLIST_TRAVERSE(&table->columns, col, list) { if (strcasecmp(col->name, colname) == 0) { return col; } } return NULL; }
struct odbc_cache_tables* ast_odbc_find_table | ( | const char * | database, |
const char * | tablename | ||
) | [read] |
Find or create an entry describing the table specified.
database | Name of an ODBC class on which to query the table |
tablename | Tablename to describe |
A | structure describing the table layout, or NULL, if the table is not found or another error occurs. When a structure is returned, the contained columns list will be rdlock'ed, to ensure that it will be retained in memory. |
Definition at line 425 of file res_odbc.c.
References ast_calloc, AST_LIST_INSERT_TAIL, ast_log(), ast_odbc_release_obj(), ast_odbc_request_obj(), ast_odbc_sanity_check(), AST_RWLIST_HEAD_INIT, AST_RWLIST_INSERT_TAIL, AST_RWLIST_RDLOCK, AST_RWLIST_TRAVERSE, AST_RWLIST_UNLOCK, ast_verb, odbc_cache_tables::columns, odbc_obj::con, odbc_cache_tables::connection, odbc_cache_columns::decimals, destroy_table_cache(), odbc_class::list, LOG_ERROR, LOG_WARNING, odbc_cache_columns::name, odbc_cache_columns::nullable, odbc_cache_columns::octetlen, odbc_cache_columns::radix, odbc_cache_columns::size, odbc_cache_tables::table, and odbc_cache_columns::type.
Referenced by require_odbc(), update2_prepare(), and update_odbc().
{ struct odbc_cache_tables *tableptr; struct odbc_cache_columns *entry; char columnname[80]; SQLLEN sqlptr; SQLHSTMT stmt = NULL; int res = 0, error = 0, try = 0; struct odbc_obj *obj = ast_odbc_request_obj(database, 0); AST_RWLIST_RDLOCK(&odbc_tables); AST_RWLIST_TRAVERSE(&odbc_tables, tableptr, list) { if (strcmp(tableptr->connection, database) == 0 && strcmp(tableptr->table, tablename) == 0) { break; } } if (tableptr) { AST_RWLIST_RDLOCK(&tableptr->columns); AST_RWLIST_UNLOCK(&odbc_tables); if (obj) { ast_odbc_release_obj(obj); } return tableptr; } if (!obj) { ast_log(LOG_WARNING, "Unable to retrieve database handle for table description '%s@%s'\n", tablename, database); AST_RWLIST_UNLOCK(&odbc_tables); return NULL; } /* Table structure not already cached; build it now. */ do { res = SQLAllocHandle(SQL_HANDLE_STMT, obj->con, &stmt); if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) { if (try == 0) { try = 1; ast_odbc_sanity_check(obj); continue; } ast_log(LOG_WARNING, "SQL Alloc Handle failed on connection '%s'!\n", database); break; } res = SQLColumns(stmt, NULL, 0, NULL, 0, (unsigned char *)tablename, SQL_NTS, (unsigned char *)"%", SQL_NTS); if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) { if (try == 0) { try = 1; SQLFreeHandle(SQL_HANDLE_STMT, stmt); ast_odbc_sanity_check(obj); continue; } ast_log(LOG_ERROR, "Unable to query database columns on connection '%s'.\n", database); break; } if (!(tableptr = ast_calloc(sizeof(char), sizeof(*tableptr) + strlen(database) + 1 + strlen(tablename) + 1))) { ast_log(LOG_ERROR, "Out of memory creating entry for table '%s' on connection '%s'\n", tablename, database); break; } tableptr->connection = (char *)tableptr + sizeof(*tableptr); tableptr->table = (char *)tableptr + sizeof(*tableptr) + strlen(database) + 1; strcpy(tableptr->connection, database); /* SAFE */ strcpy(tableptr->table, tablename); /* SAFE */ AST_RWLIST_HEAD_INIT(&(tableptr->columns)); while ((res = SQLFetch(stmt)) != SQL_NO_DATA && res != SQL_ERROR) { SQLGetData(stmt, 4, SQL_C_CHAR, columnname, sizeof(columnname), &sqlptr); if (!(entry = ast_calloc(sizeof(char), sizeof(*entry) + strlen(columnname) + 1))) { ast_log(LOG_ERROR, "Out of memory creating entry for column '%s' in table '%s' on connection '%s'\n", columnname, tablename, database); error = 1; break; } entry->name = (char *)entry + sizeof(*entry); strcpy(entry->name, columnname); SQLGetData(stmt, 5, SQL_C_SHORT, &entry->type, sizeof(entry->type), NULL); SQLGetData(stmt, 7, SQL_C_LONG, &entry->size, sizeof(entry->size), NULL); SQLGetData(stmt, 9, SQL_C_SHORT, &entry->decimals, sizeof(entry->decimals), NULL); SQLGetData(stmt, 10, SQL_C_SHORT, &entry->radix, sizeof(entry->radix), NULL); SQLGetData(stmt, 11, SQL_C_SHORT, &entry->nullable, sizeof(entry->nullable), NULL); SQLGetData(stmt, 16, SQL_C_LONG, &entry->octetlen, sizeof(entry->octetlen), NULL); /* Specification states that the octenlen should be the maximum number of bytes * returned in a char or binary column, but it seems that some drivers just set * it to NULL. (Bad Postgres! No biscuit!) */ if (entry->octetlen == 0) { entry->octetlen = entry->size; } ast_verb(10, "Found %s column with type %hd with len %ld, octetlen %ld, and numlen (%hd,%hd)\n", entry->name, entry->type, (long) entry->size, (long) entry->octetlen, entry->decimals, entry->radix); /* Insert column info into column list */ AST_LIST_INSERT_TAIL(&(tableptr->columns), entry, list); } SQLFreeHandle(SQL_HANDLE_STMT, stmt); AST_RWLIST_INSERT_TAIL(&odbc_tables, tableptr, list); AST_RWLIST_RDLOCK(&(tableptr->columns)); break; } while (1); AST_RWLIST_UNLOCK(&odbc_tables); if (error) { destroy_table_cache(tableptr); tableptr = NULL; } if (obj) { ast_odbc_release_obj(obj); } return tableptr; }
SQLHSTMT ast_odbc_prepare_and_execute | ( | struct odbc_obj * | obj, |
SQLHSTMT(*)(struct odbc_obj *obj, void *data) | prepare_cb, | ||
void * | data | ||
) |
Prepares, executes, and returns the resulting statement handle.
obj | The ODBC object |
prepare_cb | A function callback, which, when called, should return a statement handle prepared, with any necessary parameters or result columns bound. |
data | A parameter to be passed to the prepare_cb parameter function, indicating which statement handle is to be prepared. |
a | statement handle |
NULL | on error |
Definition at line 592 of file res_odbc.c.
References ast_log(), ast_odbc_sanity_check(), ast_tvnow(), odbc_class::dsn, odbc_obj::last_used, LOG_WARNING, odbc_class::name, odbc_obj::parent, odbc_obj::tx, and odbc_obj::up.
Referenced by config_odbc(), destroy_odbc(), odbc_log(), realtime_multi_odbc(), realtime_odbc(), store_odbc(), update2_odbc(), and update_odbc().
{ int res = 0, i, attempt; SQLINTEGER nativeerror=0, numfields=0; SQLSMALLINT diagbytes=0; unsigned char state[10], diagnostic[256]; SQLHSTMT stmt; for (attempt = 0; attempt < 2; attempt++) { /* This prepare callback may do more than just prepare -- it may also * bind parameters, bind results, etc. The real key, here, is that * when we disconnect, all handles become invalid for most databases. * We must therefore redo everything when we establish a new * connection. */ stmt = prepare_cb(obj, data); if (stmt) { res = SQLExecute(stmt); if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO) && (res != SQL_NO_DATA)) { if (res == SQL_ERROR) { SQLGetDiagField(SQL_HANDLE_STMT, stmt, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes); for (i = 0; i < numfields; i++) { SQLGetDiagRec(SQL_HANDLE_STMT, stmt, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes); ast_log(LOG_WARNING, "SQL Execute returned an error %d: %s: %s (%d)\n", res, state, diagnostic, diagbytes); if (i > 10) { ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields); break; } } } if (obj->tx) { ast_log(LOG_WARNING, "SQL Execute error, but unable to reconnect, as we're transactional.\n"); break; } else { ast_log(LOG_WARNING, "SQL Execute error %d! Verifying connection to %s [%s]...\n", res, obj->parent->name, obj->parent->dsn); SQLFreeHandle(SQL_HANDLE_STMT, stmt); stmt = NULL; obj->up = 0; /* * While this isn't the best way to try to correct an error, this won't automatically * fail when the statement handle invalidates. */ if (!ast_odbc_sanity_check(obj)) { break; } continue; } } else { obj->last_used = ast_tvnow(); } break; } else if (attempt == 0) { ast_odbc_sanity_check(obj); } } return stmt; }
void ast_odbc_release_obj | ( | struct odbc_obj * | obj | ) |
Releases an ODBC object previously allocated by odbc_request_obj()
obj | The ODBC object |
Definition at line 1042 of file res_odbc.c.
References find_transaction(), and odbc_release_obj2().
Referenced by acf_odbc_read(), acf_odbc_write(), ast_odbc_find_table(), cli_odbc_read(), cli_odbc_write(), config_odbc(), destroy_odbc(), load_config(), odbc_log(), odbc_register_class(), realtime_multi_odbc(), realtime_odbc(), store_odbc(), update2_odbc(), and update_odbc().
{ struct odbc_txn_frame *tx = find_transaction(NULL, obj, NULL, 0); odbc_release_obj2(obj, tx); }
struct odbc_obj* ast_odbc_request_obj | ( | const char * | name, |
int | check | ||
) | [read] |
Definition at line 1337 of file res_odbc.c.
References ast_odbc_request_obj2(), and RES_ODBC_SANITY_CHECK.
Referenced by acf_odbc_read(), acf_odbc_write(), ast_odbc_find_table(), cli_odbc_read(), cli_odbc_write(), config_odbc(), destroy_odbc(), load_config(), odbc_log(), odbc_register_class(), realtime_multi_odbc(), realtime_odbc(), store_odbc(), update2_odbc(), and update_odbc().
{ struct ast_flags flags = { check ? RES_ODBC_SANITY_CHECK : 0 }; #ifdef DEBUG_THREADS return _ast_odbc_request_obj2(name, flags, file, function, lineno); #else return ast_odbc_request_obj2(name, flags); #endif }
Retrieves a connected ODBC object.
name | The name of the ODBC class for which a connection is needed. |
flags | Set of flags used to control which connection is returned. |
ODBC | object |
NULL | if there is no connection available with the requested name. |
Connection classes may, in fact, contain multiple connection handles. If the connection is pooled, then each connection will be dedicated to the thread which requests it. Note that all connections should be released when the thread is done by calling odbc_release_obj(), below.
Definition at line 1157 of file res_odbc.c.
References ao2_alloc, ao2_callback, ao2_link, ao2_ref, aoro2_class_cb(), aoro2_obj_cb(), ast_assert, ast_atomic_fetchadd_int(), ast_copy_string(), ast_log(), ast_mutex_init(), ast_odbc_sanity_check(), ast_test_flag, ast_tvdiff_sec(), ast_tvnow(), class_container, odbc_obj::con, odbc_class::count, EOR_TX, odbc_class::idlecheck, odbc_class::isolation, odbc_obj::last_used, odbc_obj::lock, LOG_WARNING, NO_TX, odbc_class::obj_container, ODBC_FAIL, odbc_obj_connect(), odbc_obj_destructor(), odbc_obj::parent, RES_ODBC_INDEPENDENT_CONNECTION, RES_ODBC_SANITY_CHECK, USE_TX, and odbc_obj::used.
Referenced by acf_transaction_write(), and ast_odbc_request_obj().
{ struct odbc_obj *obj = NULL; struct odbc_class *class; SQLINTEGER nativeerror=0, numfields=0; SQLSMALLINT diagbytes=0, i; unsigned char state[10], diagnostic[256]; if (!(class = ao2_callback(class_container, 0, aoro2_class_cb, (char *) name))) { return NULL; } ast_assert(ao2_ref(class, 0) > 1); if (class->haspool) { /* Recycle connections before building another */ obj = ao2_callback(class->obj_container, 0, aoro2_obj_cb, EOR_TX); if (obj) { ast_assert(ao2_ref(obj, 0) > 1); } if (!obj && (ast_atomic_fetchadd_int(&class->count, +1) < class->limit)) { obj = ao2_alloc(sizeof(*obj), odbc_obj_destructor); if (!obj) { ao2_ref(class, -1); ast_atomic_fetchadd_int(&class->count, -1); return NULL; } ast_assert(ao2_ref(obj, 0) == 1); ast_mutex_init(&obj->lock); /* obj inherits the outstanding reference to class */ obj->parent = class; class = NULL; if (odbc_obj_connect(obj) == ODBC_FAIL) { ast_log(LOG_WARNING, "Failed to connect to %s\n", name); ao2_ref(obj, -1); obj = NULL; ast_assert(ao2_ref(class, 0) > 0); ast_atomic_fetchadd_int(&class->count, -1); } else { obj->used = 1; ao2_link(obj->parent->obj_container, obj); } } else { /* If construction fails due to the limit, remove our increment. */ if (!obj) { ast_atomic_fetchadd_int(&class->count, -1); } /* Object is not constructed, so delete outstanding reference to class. */ ao2_ref(class, -1); class = NULL; } if (obj && ast_test_flag(&flags, RES_ODBC_INDEPENDENT_CONNECTION)) { /* Ensure this connection has autocommit turned off. */ if (SQLSetConnectAttr(obj->con, SQL_ATTR_AUTOCOMMIT, (void *)SQL_AUTOCOMMIT_OFF, 0) == SQL_ERROR) { SQLGetDiagField(SQL_HANDLE_DBC, obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes); for (i = 0; i < numfields; i++) { SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes); ast_log(LOG_WARNING, "SQLSetConnectAttr (Autocommit) returned an error: %s: %s\n", state, diagnostic); if (i > 10) { ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields); break; } } } } } else if (ast_test_flag(&flags, RES_ODBC_INDEPENDENT_CONNECTION)) { /* Non-pooled connections -- but must use a separate connection handle */ if (!(obj = ao2_callback(class->obj_container, 0, aoro2_obj_cb, USE_TX))) { obj = ao2_alloc(sizeof(*obj), odbc_obj_destructor); if (!obj) { ao2_ref(class, -1); return NULL; } ast_mutex_init(&obj->lock); /* obj inherits the outstanding reference to class */ obj->parent = class; class = NULL; if (odbc_obj_connect(obj) == ODBC_FAIL) { ast_log(LOG_WARNING, "Failed to connect to %s\n", name); ao2_ref(obj, -1); obj = NULL; } else { obj->used = 1; ao2_link(obj->parent->obj_container, obj); ast_atomic_fetchadd_int(&obj->parent->count, +1); } } if (obj && SQLSetConnectAttr(obj->con, SQL_ATTR_AUTOCOMMIT, (void *)SQL_AUTOCOMMIT_OFF, 0) == SQL_ERROR) { SQLGetDiagField(SQL_HANDLE_DBC, obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes); for (i = 0; i < numfields; i++) { SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes); ast_log(LOG_WARNING, "SetConnectAttr (Autocommit) returned an error: %s: %s\n", state, diagnostic); if (i > 10) { ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields); break; } } } } else { /* Non-pooled connection: multiple modules can use the same connection. */ if ((obj = ao2_callback(class->obj_container, 0, aoro2_obj_cb, NO_TX))) { /* Object is not constructed, so delete outstanding reference to class. */ ast_assert(ao2_ref(class, 0) > 1); ao2_ref(class, -1); class = NULL; } else { /* No entry: build one */ if (!(obj = ao2_alloc(sizeof(*obj), odbc_obj_destructor))) { ast_assert(ao2_ref(class, 0) > 1); ao2_ref(class, -1); return NULL; } ast_mutex_init(&obj->lock); /* obj inherits the outstanding reference to class */ obj->parent = class; class = NULL; if (odbc_obj_connect(obj) == ODBC_FAIL) { ast_log(LOG_WARNING, "Failed to connect to %s\n", name); ao2_ref(obj, -1); obj = NULL; } else { ao2_link(obj->parent->obj_container, obj); ast_assert(ao2_ref(obj, 0) > 1); } } if (obj && SQLSetConnectAttr(obj->con, SQL_ATTR_AUTOCOMMIT, (void *)SQL_AUTOCOMMIT_ON, 0) == SQL_ERROR) { SQLGetDiagField(SQL_HANDLE_DBC, obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes); for (i = 0; i < numfields; i++) { SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes); ast_log(LOG_WARNING, "SetConnectAttr (Autocommit) returned an error: %s: %s\n", state, diagnostic); if (i > 10) { ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields); break; } } } } /* Set the isolation property */ if (obj && SQLSetConnectAttr(obj->con, SQL_ATTR_TXN_ISOLATION, (void *)(long)obj->parent->isolation, 0) == SQL_ERROR) { SQLGetDiagField(SQL_HANDLE_DBC, obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes); for (i = 0; i < numfields; i++) { SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes); ast_log(LOG_WARNING, "SetConnectAttr (Txn isolation) returned an error: %s: %s\n", state, diagnostic); if (i > 10) { ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields); break; } } } if (obj && ast_test_flag(&flags, RES_ODBC_SANITY_CHECK)) { ast_odbc_sanity_check(obj); } else if (obj && obj->parent->idlecheck > 0 && ast_tvdiff_sec(ast_tvnow(), obj->last_used) > obj->parent->idlecheck) odbc_obj_connect(obj); #ifdef DEBUG_THREADS if (obj) { ast_copy_string(obj->file, file, sizeof(obj->file)); ast_copy_string(obj->function, function, sizeof(obj->function)); obj->lineno = lineno; } #endif ast_assert(class == NULL); if (obj) { ast_assert(ao2_ref(obj, 0) > 1); } return obj; }
struct odbc_obj* ast_odbc_retrieve_transaction_obj | ( | struct ast_channel * | chan, |
const char * | objname | ||
) | [read] |
Retrieve a stored ODBC object, if a transaction has been started.
chan | Channel associated with the transaction. |
objname | Name of the database handle. This name corresponds to the name passed to |
A | stored ODBC object, if a transaction was already started. |
NULL,if | no transaction yet exists. |
Definition at line 1348 of file res_odbc.c.
References ast_channel_datastore_find(), ast_channel_lock, ast_channel_unlock, AST_LIST_HEAD, AST_LIST_LOCK, AST_LIST_TRAVERSE, AST_LIST_UNLOCK, ast_datastore::data, odbc_class::list, odbc_class::name, odbc_txn_frame::obj, odbc_obj::parent, and txn_info.
Referenced by acf_odbc_write().
{ struct ast_datastore *txn_store; AST_LIST_HEAD(, odbc_txn_frame) *oldlist; struct odbc_txn_frame *txn = NULL; if (!chan) { /* No channel == no transaction */ return NULL; } ast_channel_lock(chan); if ((txn_store = ast_channel_datastore_find(chan, &txn_info, NULL))) { oldlist = txn_store->data; } else { ast_channel_unlock(chan); return NULL; } AST_LIST_LOCK(oldlist); ast_channel_unlock(chan); AST_LIST_TRAVERSE(oldlist, txn, list) { if (txn->obj && txn->obj->parent && !strcmp(txn->obj->parent->name, objname)) { AST_LIST_UNLOCK(oldlist); return txn->obj; } } AST_LIST_UNLOCK(oldlist); return NULL; }
int ast_odbc_sanity_check | ( | struct odbc_obj * | obj | ) |
Checks an ODBC object to ensure it is still connected.
obj | The ODBC object |
0 | if connected |
-1 | otherwise. |
Definition at line 696 of file res_odbc.c.
References ast_log(), ast_strlen_zero(), odbc_obj::con, LOG_WARNING, odbc_obj_connect(), odbc_obj_disconnect(), odbc_obj::parent, odbc_class::sanitysql, odbc_obj::tx, and odbc_obj::up.
Referenced by ast_odbc_direct_execute(), ast_odbc_find_table(), ast_odbc_prepare_and_execute(), ast_odbc_request_obj2(), and handle_cli_odbc_show().
{ char *test_sql = "select 1"; SQLHSTMT stmt; int res = 0; if (!ast_strlen_zero(obj->parent->sanitysql)) test_sql = obj->parent->sanitysql; if (obj->up) { res = SQLAllocHandle(SQL_HANDLE_STMT, obj->con, &stmt); if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) { obj->up = 0; } else { res = SQLPrepare(stmt, (unsigned char *)test_sql, SQL_NTS); if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) { obj->up = 0; } else { res = SQLExecute(stmt); if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) { obj->up = 0; } } } SQLFreeHandle (SQL_HANDLE_STMT, stmt); } if (!obj->up && !obj->tx) { /* Try to reconnect! */ ast_log(LOG_WARNING, "Connection is down attempting to reconnect...\n"); odbc_obj_disconnect(obj); odbc_obj_connect(obj); } return obj->up; }
int ast_odbc_smart_execute | ( | struct odbc_obj * | obj, |
SQLHSTMT | stmt | ||
) |
Executes a prepared statement handle.
obj | The non-NULL result of odbc_request_obj() |
stmt | The prepared statement handle |
0 | on success |
-1 | on failure |
This function was originally designed simply to execute a prepared statement handle and to retry if the initial execution failed. Unfortunately, it did this by disconnecting and reconnecting the database handle which on most databases causes the statement handle to become invalid. Therefore, this method has been deprecated in favor of odbc_prepare_and_execute() which allows the statement to be prepared multiple times, if necessary, in case of a loss of connection.
This function really only ever worked with MySQL, where the statement handle is not prepared on the server. If you are not using MySQL, you should avoid it.
Definition at line 653 of file res_odbc.c.
References ast_log(), ast_tvnow(), odbc_obj::last_used, and LOG_WARNING.
{ int res = 0, i; SQLINTEGER nativeerror=0, numfields=0; SQLSMALLINT diagbytes=0; unsigned char state[10], diagnostic[256]; res = SQLExecute(stmt); if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO) && (res != SQL_NO_DATA)) { if (res == SQL_ERROR) { SQLGetDiagField(SQL_HANDLE_STMT, stmt, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes); for (i = 0; i < numfields; i++) { SQLGetDiagRec(SQL_HANDLE_STMT, stmt, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes); ast_log(LOG_WARNING, "SQL Execute returned an error %d: %s: %s (%d)\n", res, state, diagnostic, diagbytes); if (i > 10) { ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields); break; } } } } else obj->last_used = ast_tvnow(); return res; }