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cursor.c
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cursor.c
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/**
* Copyright 2009-2012 10gen, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <php.h>
#include <zend_interfaces.h>
#include <zend_exceptions.h>
#include "mcon/io.h"
#include "mcon/manager.h"
#include "mcon/utils.h"
#ifdef WIN32
# ifndef int64_t
typedef __int64 int64_t;
# endif
#else
#include <unistd.h>
#include <pthread.h>
#endif
#include <math.h>
#include "php_mongo.h"
#include "bson.h"
#include "db.h"
#include "cursor.h"
#include "collection.h"
#include "mongo_types.h"
#include "util/log.h"
#if WIN32
HANDLE cursor_mutex;
#else
static pthread_mutex_t cursor_mutex = PTHREAD_MUTEX_INITIALIZER;
#endif
/* Cursor flags */
#define CURSOR_FLAG_TAILABLE 2
#define CURSOR_FLAG_SLAVE_OKAY 4
#define CURSOR_FLAG_OPLOG_REPLAY 8 /* Don't use */
#define CURSOR_FLAG_NO_CURSOR_TO 16
#define CURSOR_FLAG_AWAIT_DATA 32
#define CURSOR_FLAG_EXHAUST 64 /* Not implemented */
#define CURSOR_FLAG_PARTIAL 128
/* Macro to check whether a cursor is dead, and if so, bailout */
#define MONGO_CURSOR_CHECK_DEAD \
if (cursor->dead) { \
zend_throw_exception(mongo_ce_ConnectionException, "the connection has been terminated, and this cursor is dead", 12 TSRMLS_CC); \
return; \
}
// externs
extern zend_class_entry *mongo_ce_Id,
*mongo_ce_MongoClient,
*mongo_ce_DB,
*mongo_ce_Collection,
*mongo_ce_Exception,
*mongo_ce_ConnectionException,
*mongo_ce_CursorTOException;
extern int le_pconnection,
le_cursor_list;
extern zend_object_handlers mongo_default_handlers;
zend_class_entry *mongo_ce_CursorException;
ZEND_EXTERN_MODULE_GLOBALS(mongo);
static zend_object_value php_mongo_cursor_new(zend_class_entry *class_type TSRMLS_DC);
static void make_special(mongo_cursor *);
static void kill_cursor(cursor_node *node, zend_rsrc_list_entry *le TSRMLS_DC);
zend_class_entry *mongo_ce_Cursor = NULL;
/*
* Cursor related read/write functions
*/
/*
* This method reads the message header for a database response
* It returns failure or success and throws an exception on failure.
*
* Returns:
* 0 on success
* -1 on failure, but not critical enough to throw an exception
* 1.. on failure, and throw an exception. The return value is the error code
*/
static signed int get_cursor_header(int sock, mongo_cursor *cursor, char **error_message TSRMLS_DC)
{
int status = 0;
int num_returned = 0;
char buf[REPLY_HEADER_LEN];
php_mongo_log(MLOG_IO, MLOG_FINE TSRMLS_CC, "getting cursor header");
/* set a timeout */
if (cursor->timeout && cursor->timeout > 0) {
status = mongo_io_wait_with_timeout(sock, cursor->timeout, error_message);
if (status != 0) {
return status;
}
}
status = recv(sock, buf, REPLY_HEADER_LEN, FLAGS);
/* socket has been closed */
if (status == 0) {
*error_message = strdup("socket has been closed");
return -1;
} else if (status < INT_32*4) {
*error_message = strdup("couldn't get response header");
return 4;
}
/* switch the byte order, if necessary */
cursor->recv.length = MONGO_32(*(int*)buf);
/* make sure we're not getting crazy data */
if (cursor->recv.length == 0) {
*error_message = strdup("No response from the database");
return 5;
} else if (cursor->recv.length < REPLY_HEADER_SIZE) {
*error_message = malloc(256);
snprintf(*error_message, 256, "bad response length: %d, did the db assert?", cursor->recv.length);
return 6;
}
cursor->recv.request_id = MONGO_32(*(int*)(buf+INT_32));
cursor->recv.response_to = MONGO_32(*(int*)(buf+INT_32*2));
cursor->recv.op = MONGO_32(*(int*)(buf+INT_32*3));
cursor->flag = MONGO_32(*(int*)(buf+INT_32*4));
cursor->cursor_id = MONGO_64(*(int64_t*)(buf+INT_32*5));
cursor->start = MONGO_32(*(int*)(buf+INT_32*5+INT_64));
num_returned = MONGO_32(*(int*)(buf+INT_32*6+INT_64));
/* TODO: find out what this does */
if (cursor->recv.response_to > MonGlo(response_num)) {
MonGlo(response_num) = cursor->recv.response_to;
}
/* cursor->num is the total of the elements we've retrieved (elements
* already iterated through + elements in db response but not yet iterated
* through) */
cursor->num += num_returned;
/* create buf */
cursor->recv.length -= REPLY_HEADER_LEN;
return 0;
}
/* Reads a cursors body
* Returns 0 on failure or an int indicating the number of bytes read */
static int get_cursor_body(int sock, mongo_cursor *cursor, char **error_message TSRMLS_DC)
{
mongoclient *client = (mongoclient*)zend_object_store_get_object(cursor->resource TSRMLS_CC);
php_mongo_log(MLOG_IO, MLOG_FINE TSRMLS_CC, "getting cursor body");
if (cursor->buf.start) {
efree(cursor->buf.start);
}
cursor->buf.start = (char*)emalloc(cursor->recv.length);
cursor->buf.end = cursor->buf.start + cursor->recv.length;
cursor->buf.pos = cursor->buf.start;
/* finish populating cursor */
return mongo_io_recv_data(sock, &client->servers->options, cursor->buf.pos, cursor->recv.length, error_message);
}
/* Cursor helper function */
int php_mongo_get_reply(mongo_cursor *cursor, zval *errmsg TSRMLS_DC)
{
int sock;
unsigned int status;
char *error_message = NULL;
php_mongo_log(MLOG_IO, MLOG_FINE TSRMLS_CC, "getting reply");
sock = cursor->connection->socket;
status = get_cursor_header(sock, cursor, (char**) &error_message TSRMLS_CC);
if (status == -1 || status > 0) {
mongo_cursor_throw(cursor->connection, status TSRMLS_CC, "%s", error_message);
free(error_message);
return FAILURE;
}
/* Check that this is actually the response we want */
if (cursor->send.request_id != cursor->recv.response_to) {
php_mongo_log(MLOG_IO, MLOG_WARN TSRMLS_CC, "request/cursor mismatch: %d vs %d", cursor->send.request_id, cursor->recv.response_to);
mongo_cursor_throw(cursor->connection, 9 TSRMLS_CC, "request/cursor mismatch: %d vs %d", cursor->send.request_id, cursor->recv.response_to);
return FAILURE;
}
if (FAILURE == get_cursor_body(sock, cursor, (char **) &error_message TSRMLS_CC)) {
#ifdef WIN32
mongo_cursor_throw(cursor->connection, 12 TSRMLS_CC, "WSA error getting database response %s (%d)", error_message, WSAGetLastError());
#else
mongo_cursor_throw(cursor->connection, 12 TSRMLS_CC, "error getting database response %s (%d)", error_message, strerror(errno));
#endif
return FAILURE;
}
/* If no catastrophic error has happened yet, we're fine, set errmsg to
* null */
ZVAL_NULL(errmsg);
return SUCCESS;
}
/* {{{ MongoCursor->__construct
*/
PHP_METHOD(MongoCursor, __construct) {
zval *zlink = 0, *zquery = 0, *zfields = 0, *empty, *timeout;
char *ns;
int ns_len;
zval **data;
mongo_cursor *cursor;
mongoclient *link;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "Os|zz", &zlink, mongo_ce_MongoClient, &ns, &ns_len, &zquery, &zfields) == FAILURE) {
return;
}
MUST_BE_ARRAY_OR_OBJECT(3, zquery);
MUST_BE_ARRAY_OR_OBJECT(4, zfields);
// if query or fields weren't passed, make them default to an empty array
MAKE_STD_ZVAL(empty);
object_init(empty);
// these are both initialized to the same zval, but that's okay because
// there's no way to change them without creating a new cursor
if (!zquery || (Z_TYPE_P(zquery) == IS_ARRAY && zend_hash_num_elements(HASH_P(zquery)) == 0)) {
zquery = empty;
}
if (!zfields) {
zfields = empty;
}
cursor = (mongo_cursor*)zend_object_store_get_object(getThis() TSRMLS_CC);
link = (mongoclient*)zend_object_store_get_object(zlink TSRMLS_CC);
// db connection
cursor->resource = zlink;
zval_add_ref(&zlink);
// change ['x', 'y', 'z'] into {'x' : 1, 'y' : 1, 'z' : 1}
if (Z_TYPE_P(zfields) == IS_ARRAY) {
HashPosition pointer;
zval *fields;
MAKE_STD_ZVAL(fields);
array_init(fields);
// fields to return
for(zend_hash_internal_pointer_reset_ex(Z_ARRVAL_P(zfields), &pointer);
zend_hash_get_current_data_ex(Z_ARRVAL_P(zfields), (void**) &data, &pointer) == SUCCESS;
zend_hash_move_forward_ex(Z_ARRVAL_P(zfields), &pointer)) {
int key_type, key_len;
ulong index;
char *key;
key_type = zend_hash_get_current_key_ex(Z_ARRVAL_P(zfields), &key, (uint*)&key_len, &index, NO_DUP, &pointer);
if (key_type == HASH_KEY_IS_LONG) {
if (Z_TYPE_PP(data) == IS_STRING) {
add_assoc_long(fields, Z_STRVAL_PP(data), 1);
}
else {
zval_ptr_dtor(&empty);
zval_ptr_dtor(&fields);
zend_throw_exception(mongo_ce_Exception, "field names must be strings", 0 TSRMLS_CC);
return;
}
}
else {
add_assoc_zval(fields, key, *data);
zval_add_ref(data);
}
}
cursor->fields = fields;
}
// if it's already an object, we don't have to worry
else {
cursor->fields = zfields;
zval_add_ref(&zfields);
}
/* ns */
cursor->ns = estrdup(ns);
// query
cursor->query = zquery;
zval_add_ref(&zquery);
// reset iteration pointer, just in case
MONGO_METHOD(MongoCursor, reset, return_value, getThis());
cursor->at = 0;
cursor->num = 0;
cursor->special = 0;
cursor->persist = 0;
timeout = zend_read_static_property(mongo_ce_Cursor, "timeout", strlen("timeout"), NOISY TSRMLS_CC);
convert_to_long(timeout);
cursor->timeout = Z_LVAL_P(timeout);
/* Overwrite the timeout if MongoCursor::$timeout is the default and we
* passed in socketTimeoutMS in the connection string */
if (cursor->timeout == PHP_MONGO_DEFAULT_SOCKET_TIMEOUT && link->servers->options.socketTimeoutMS > 0) {
cursor->timeout = link->servers->options.socketTimeoutMS;
}
/* If the static property "slaveOkay" is set, we need to switch to a
* MONGO_RP_SECONDARY_PREFERRED as well, but only if read preferences
* aren't already set. */
if (cursor->read_pref.type == MONGO_RP_PRIMARY) {
zval *zslaveokay;
zslaveokay = zend_read_static_property(mongo_ce_Cursor, "slaveOkay", strlen("slaveOkay"), NOISY TSRMLS_CC);
cursor->read_pref.type = Z_BVAL_P(zslaveokay) ? MONGO_RP_SECONDARY_PREFERRED : MONGO_RP_PRIMARY;
}
// get rid of extra ref
zval_ptr_dtor(&empty);
}
/* }}} */
static void make_special(mongo_cursor *cursor) {
zval *temp;
if (cursor->special) {
return;
}
cursor->special = 1;
temp = cursor->query;
MAKE_STD_ZVAL(cursor->query);
array_init(cursor->query);
add_assoc_zval(cursor->query, "$query", temp);
}
/* {{{ MongoCursor::hasNext
*/
PHP_METHOD(MongoCursor, hasNext) {
buffer buf;
int size;
mongo_cursor *cursor = (mongo_cursor*)zend_object_store_get_object(getThis() TSRMLS_CC);
char *error_message = NULL;
zval *temp;
MONGO_CHECK_INITIALIZED(cursor->resource, MongoCursor);
if (!cursor->started_iterating) {
MONGO_METHOD(MongoCursor, doQuery, return_value, getThis());
cursor->started_iterating = 1;
}
MONGO_CHECK_INITIALIZED(cursor->connection, MongoCursor);
if ((cursor->limit > 0 && cursor->at >= cursor->limit) || cursor->num == 0) {
if (cursor->cursor_id != 0) {
mongo_cursor_free_le(cursor, MONGO_CURSOR TSRMLS_CC);
}
RETURN_FALSE;
}
if (cursor->at < cursor->num) {
RETURN_TRUE;
}
else if (cursor->cursor_id == 0) {
RETURN_FALSE;
}
// if we have a cursor_id, we should have a server
else if (cursor->connection == 0) {
mongo_cursor_throw(0, 18 TSRMLS_CC, "trying to get more, but cannot find server");
return;
}
// we have to go and check with the db
size = 34+strlen(cursor->ns);
CREATE_BUF(buf, size);
if (FAILURE == php_mongo_write_get_more(&buf, cursor TSRMLS_CC)) {
efree(buf.start);
return;
}
if (mongo_io_send(cursor->connection->socket, buf.start, buf.pos - buf.start, (char**) &error_message) == -1) {
efree(buf.start);
mongo_cursor_throw(cursor->connection, 1 TSRMLS_CC, "%s", error_message);
free(error_message);
mongo_util_cursor_failed(cursor TSRMLS_CC);
return;
}
efree(buf.start);
MAKE_STD_ZVAL(temp);
ZVAL_NULL(temp);
if (php_mongo_get_reply(cursor, temp TSRMLS_CC) != SUCCESS) {
free(error_message);
mongo_util_cursor_failed(cursor TSRMLS_CC);
return;
}
zval_ptr_dtor(&temp);
if (cursor->cursor_id == 0) {
mongo_cursor_free_le(cursor, MONGO_CURSOR TSRMLS_CC);
}
// if cursor_id != 0, server should stay the same
if (cursor->flag & 1) {
mongo_cursor_throw(cursor->connection, 2 TSRMLS_CC, "cursor not found");
return;
}
// sometimes we'll have a cursor_id but there won't be any more results
if (cursor->at >= cursor->num) {
RETURN_FALSE;
}
// but sometimes there will be
else {
RETURN_TRUE;
}
}
/* }}} */
/* {{{ MongoCursor::getNext
*/
PHP_METHOD(MongoCursor, getNext)
{
mongo_cursor *cursor = (mongo_cursor*)zend_object_store_get_object(getThis() TSRMLS_CC);
MONGO_CHECK_INITIALIZED(cursor->resource, MongoCursor);
MONGO_CURSOR_CHECK_DEAD;
MONGO_METHOD(MongoCursor, next, return_value, getThis());
// will be null unless there was an error
if (EG(exception) ||
(Z_TYPE_P(return_value) == IS_BOOL && Z_BVAL_P(return_value) == 0)) {
ZVAL_NULL(return_value);
return;
}
MONGO_METHOD(MongoCursor, current, return_value, getThis());
}
/* }}} */
/* {{{ MongoCursor::limit
*/
PHP_METHOD(MongoCursor, limit) {
long l;
mongo_cursor *cursor;
PREITERATION_SETUP;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l", &l) == FAILURE) {
return;
}
cursor->limit = l;
RETVAL_ZVAL(getThis(), 1, 0);
}
/* }}} */
/* {{{ MongoCursor::batchSize
*/
PHP_METHOD(MongoCursor, batchSize) {
long l;
mongo_cursor *cursor;
PREITERATION_SETUP;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l", &l) == FAILURE) {
return;
}
cursor->batch_size = l;
RETVAL_ZVAL(getThis(), 1, 0);
}
/* }}} */
/* {{{ MongoCursor::skip
*/
PHP_METHOD(MongoCursor, skip) {
long l;
mongo_cursor *cursor;
PREITERATION_SETUP;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l", &l) == FAILURE) {
return;
}
cursor->skip = l;
RETURN_ZVAL(getThis(), 1, 0);
}
/* }}} */
/* {{{ MongoCursor::fields
*/
PHP_METHOD(MongoCursor, fields) {
zval *z;
mongo_cursor *cursor;
PREITERATION_SETUP;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &z) == FAILURE) {
return;
}
MUST_BE_ARRAY_OR_OBJECT(1, z);
zval_ptr_dtor(&cursor->fields);
cursor->fields = z;
zval_add_ref(&z);
RETURN_ZVAL(getThis(), 1, 0);
}
/* }}} */
/* {{{ MongoCursor::dead
*/
PHP_METHOD(MongoCursor, dead) {
mongo_cursor *cursor = (mongo_cursor*)zend_object_store_get_object(getThis() TSRMLS_CC);
MONGO_CHECK_INITIALIZED(cursor->resource, MongoCursor);
RETURN_BOOL(cursor->dead || (cursor->started_iterating && cursor->cursor_id == 0));
}
/* }}} */
/* {{{ Cursor flags
* Sets or unsets the flag <flag>. With mode = -1, the arguments are parsed.
* Otherwise the mode should contain 0 for unsetting and 1 for setting the flag.
*/
static inline void set_cursor_flag(INTERNAL_FUNCTION_PARAMETERS, int flag, int mode)
{
zend_bool z = 1;
mongo_cursor *cursor;
PREITERATION_SETUP;
if (mode == -1) {
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|b", &z) == FAILURE) {
return;
}
} else {
z = mode;
}
if (z) {
cursor->opts |= flag;
} else {
cursor->opts &= ~flag;
}
RETURN_ZVAL(getThis(), 1, 0);
}
/* {{{ MongoCursor::setFlag(int bit [, bool set])
*/
PHP_METHOD(MongoCursor, setFlag)
{
long bit;
zend_bool set = 1;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l|b", &bit, &set) == FAILURE) {
return;
}
/* Prevent bit 3 (CURSOR_FLAG_OPLOG_REPLAY) and bit 6 (CURSOR_FLAG_EXHAUST) from
* being set. The first because it's an internal flag, and the second because
* the driver can't handle this at the moment. */
if (bit == 3 || bit == 6) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "The CURSOR_FLAG_OPLOG_REPLAY(3) and CURSOR_FLAG_EXHAUST(6) flags are not supported.");
return;
}
set_cursor_flag(INTERNAL_FUNCTION_PARAM_PASSTHRU, 1 << bit, set);
}
/* }}} */
/* {{{ MongoCursor::tailable(bool flag)
*/
PHP_METHOD(MongoCursor, tailable)
{
set_cursor_flag(INTERNAL_FUNCTION_PARAM_PASSTHRU, CURSOR_FLAG_TAILABLE, -1);
}
/* }}} */
/* {{{ MongoCursor::slaveOkay(bool flag)
*/
PHP_METHOD(MongoCursor, slaveOkay)
{
mongo_cursor *cursor;
zend_bool slave_okay = 1;
PREITERATION_SETUP;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|b", &slave_okay) == FAILURE) {
return;
}
set_cursor_flag(INTERNAL_FUNCTION_PARAM_PASSTHRU, CURSOR_FLAG_SLAVE_OKAY, slave_okay);
/* slaveOkay implicitly sets read preferences.
*
* With slave_okay being true or absent, the RP is switched to SECONDARY
* PREFERRED but only if the current configured RP is PRIMARY - so that
* other read preferences are not overwritten. As slaveOkay really only
* means "read from any secondary" that does not conflict.
*
* With slave_okay being false, the RP is switched to PRIMARY. Setting it
* to PRIMARY when it already is PRIMARY doesn't hurt. */
if (slave_okay) {
if (cursor->read_pref.type == MONGO_RP_PRIMARY) {
cursor->read_pref.type = MONGO_RP_SECONDARY_PREFERRED;
}
} else {
cursor->read_pref.type = MONGO_RP_PRIMARY;
}
}
/* }}} */
/* {{{ MongoCursor::immortal(bool flag)
*/
PHP_METHOD(MongoCursor, immortal)
{
set_cursor_flag(INTERNAL_FUNCTION_PARAM_PASSTHRU, CURSOR_FLAG_NO_CURSOR_TO, -1);
}
/* }}} */
/* {{{ MongoCursor::awaitData(bool flag)
*/
PHP_METHOD(MongoCursor, awaitData)
{
set_cursor_flag(INTERNAL_FUNCTION_PARAM_PASSTHRU, CURSOR_FLAG_AWAIT_DATA, -1);
}
/* }}} */
/* {{{ MongoCursor::partial(bool flag)
*/
PHP_METHOD(MongoCursor, partial)
{
set_cursor_flag(INTERNAL_FUNCTION_PARAM_PASSTHRU, CURSOR_FLAG_PARTIAL, -1);
}
/* }}} */
/* }}} */
/* {{{ MongoCursor::timeout
*/
PHP_METHOD(MongoCursor, timeout) {
long timeout;
mongo_cursor *cursor;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l", &timeout) == FAILURE) {
return;
}
PHP_MONGO_GET_CURSOR(getThis());
cursor->timeout = timeout;
RETURN_ZVAL(getThis(), 1, 0);
}
/* }}} */
PHP_METHOD(MongoCursor, getReadPreference)
{
mongo_cursor *cursor;
PHP_MONGO_GET_CURSOR(getThis());
array_init(return_value);
add_assoc_string(return_value, "type", mongo_read_preference_type_to_name(cursor->read_pref.type), 1);
php_mongo_add_tagsets(return_value, &cursor->read_pref);
}
/* {{{ MongoCursor::setReadPreference(string read_preference [, array tags ])
* Sets a read preference to be used for all read queries.*/
PHP_METHOD(MongoCursor, setReadPreference)
{
char *read_preference;
int read_preference_len;
mongo_cursor *cursor;
HashTable *tags = NULL;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|h", &read_preference, &read_preference_len, &tags) == FAILURE) {
return;
}
PHP_MONGO_GET_CURSOR(getThis());
php_mongo_set_readpreference(&cursor->read_pref, read_preference, tags TSRMLS_CC);
RETURN_ZVAL(getThis(), 1, 0);
}
/* }}} */
/* {{{ MongoCursor::addOption
*/
PHP_METHOD(MongoCursor, addOption) {
char *key;
int key_len;
zval *query, *value;
mongo_cursor *cursor;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sz", &key, &key_len, &value) == FAILURE) {
return;
}
cursor = (mongo_cursor*)zend_object_store_get_object(getThis() TSRMLS_CC);
MONGO_CHECK_INITIALIZED(cursor->resource, MongoCursor);
if (cursor->started_iterating) {
MONGO_CHECK_INITIALIZED(cursor->connection, MongoCursor);
mongo_cursor_throw(cursor->connection, 0 TSRMLS_CC, "cannot modify cursor after beginning iteration");
return;
}
make_special(cursor);
query = cursor->query;
add_assoc_zval(query, key, value);
zval_add_ref(&value);
RETURN_ZVAL(getThis(), 1, 0);
}
/* }}} */
/* {{{ MongoCursor::snapshot
*/
PHP_METHOD(MongoCursor, snapshot) {
zval *snapshot, *yes;
mongo_cursor *cursor = (mongo_cursor*)zend_object_store_get_object(getThis() TSRMLS_CC);
MONGO_CHECK_INITIALIZED(cursor->resource, MongoCursor);
MAKE_STD_ZVAL(snapshot);
ZVAL_STRING(snapshot, "$snapshot", 1);
MAKE_STD_ZVAL(yes);
ZVAL_TRUE(yes);
MONGO_METHOD2(MongoCursor, addOption, return_value, getThis(), snapshot, yes);
zval_ptr_dtor(&snapshot);
zval_ptr_dtor(&yes);
}
/* }}} */
/* {{{ MongoCursor->sort(array fields)
*/
PHP_METHOD(MongoCursor, sort) {
zval *orderby, *fields;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &fields) == FAILURE) {
return;
}
MUST_BE_ARRAY_OR_OBJECT(1, fields);
MAKE_STD_ZVAL(orderby);
ZVAL_STRING(orderby, "$orderby", 1);
MONGO_METHOD2(MongoCursor, addOption, return_value, getThis(), orderby, fields);
zval_ptr_dtor(&orderby);
}
/* }}} */
/* {{{ MongoCursor->hint
*/
PHP_METHOD(MongoCursor, hint) {
zval *hint, *fields;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &fields) == FAILURE) {
return;
}
MUST_BE_ARRAY_OR_OBJECT(1, fields);
MAKE_STD_ZVAL(hint);
ZVAL_STRING(hint, "$hint", 1);
MONGO_METHOD2(MongoCursor, addOption, return_value, getThis(), hint, fields);
zval_ptr_dtor(&hint);
}
/* }}} */
/* {{{ MongoCursor->getCursorInfo: Return information about the current query (by @crodas)
*/
PHP_METHOD(MongoCursor, info)
{
mongo_cursor *cursor = (mongo_cursor*)zend_object_store_get_object(getThis() TSRMLS_CC);
MONGO_CHECK_INITIALIZED(cursor->resource, MongoCursor);
array_init(return_value);
add_assoc_string(return_value, "ns", cursor->ns, 1);
add_assoc_long(return_value, "limit", cursor->limit);
add_assoc_long(return_value, "batchSize", cursor->batch_size);
add_assoc_long(return_value, "skip", cursor->skip);
add_assoc_long(return_value, "flags", cursor->opts);
if (cursor->query) {
add_assoc_zval(return_value, "query", cursor->query);
zval_add_ref(&cursor->query);
} else {
add_assoc_null(return_value, "query");
}
if (cursor->fields) {
add_assoc_zval(return_value, "fields", cursor->fields);
zval_add_ref(&cursor->fields);
} else {
add_assoc_null(return_value, "fields");
}
add_assoc_bool(return_value, "started_iterating", cursor->started_iterating);
if (cursor->started_iterating) {
char *host;
int port;
add_assoc_long(return_value, "id", (long)cursor->cursor_id);
add_assoc_long(return_value, "at", cursor->at);
add_assoc_long(return_value, "numReturned", cursor->num);
add_assoc_string(return_value, "server", cursor->connection->hash, 1);
mongo_server_split_hash(cursor->connection->hash, &host, &port, NULL, NULL, NULL, NULL, NULL);
add_assoc_string(return_value, "host", host, 1);
free(host);
add_assoc_long(return_value, "port", port);
add_assoc_string(return_value, "connection_type_desc", mongo_connection_type(cursor->connection->connection_type), 1);
}
}
/* }}} */
/* {{{ MongoCursor->explain
*/
PHP_METHOD(MongoCursor, explain) {
int temp_limit;
zval *explain, *yes, *temp = 0;
mongo_cursor *cursor = (mongo_cursor*)zend_object_store_get_object(getThis() TSRMLS_CC);
MONGO_CHECK_INITIALIZED(cursor->resource, MongoCursor);
MONGO_METHOD(MongoCursor, reset, return_value, getThis());
// make explain use a hard limit
temp_limit = cursor->limit;
if (cursor->limit > 0) {
cursor->limit *= -1;
}
MAKE_STD_ZVAL(explain);
ZVAL_STRING(explain, "$explain", 1);
MAKE_STD_ZVAL(yes);
ZVAL_TRUE(yes);
MONGO_METHOD2(MongoCursor, addOption, return_value, getThis(), explain, yes);
zval_ptr_dtor(&explain);
zval_ptr_dtor(&yes);
MONGO_METHOD(MongoCursor, getNext, return_value, getThis());
// reset cursor to original state
cursor->limit = temp_limit;
zend_hash_del(HASH_P(cursor->query), "$explain", strlen("$explain")+1);
MAKE_STD_ZVAL(temp);
ZVAL_NULL(temp);
MONGO_METHOD(MongoCursor, reset, temp, getThis());
zval_ptr_dtor(&temp);
}
/* }}} */
/* {{{ MongoCursor->doQuery
*/
PHP_METHOD(MongoCursor, doQuery) {
mongo_cursor *cursor;
PHP_MONGO_GET_CURSOR(getThis());
MONGO_CHECK_INITIALIZED(cursor->resource, MongoCursor);
do {
MONGO_METHOD(MongoCursor, reset, return_value, getThis());
if (mongo_cursor__do_query(getThis(), return_value TSRMLS_CC) == SUCCESS ||
EG(exception)) {
return;
}
} while (mongo_cursor__should_retry(cursor));
if (strcmp(".$cmd", cursor->ns+(strlen(cursor->ns)-5)) == 0) {
mongo_cursor_throw(cursor->connection, 19 TSRMLS_CC, "couldn't send command");
return;
}
mongo_cursor_throw(cursor->connection, 19 TSRMLS_CC, "max number of retries exhausted, couldn't send query");
}
/* }}} */
/* Cursor helpers */
int mongo_cursor_mark_dead(void *callback_data)
{
mongo_cursor *cursor = (mongo_cursor*) callback_data;
cursor->dead = 1;
cursor->connection = NULL;
return 1;
}
/* Adds the $readPreference option to the query objects */
void mongo_apply_mongos_rp(mongo_cursor *cursor, mongoclient *link)
{
zval *query, *rp, *tags;
char *type;
/* Older mongos don't like $readPreference, so don't apply it
* when we want the default behaviour anyway */
if (link->servers->read_pref.type == MONGO_RP_PRIMARY) {
return;
}
if (link->servers->read_pref.type == MONGO_RP_SECONDARY_PREFERRED) {
/* If there aren't any tags, don't add $readPreference, the slaveOkay
* flag is enough This gives us improved compatability with older
* mongos */
if (link->servers->read_pref.tagset_count == 0) {
return;
}
}
type = mongo_read_preference_type_to_name(link->servers->read_pref.type);
MAKE_STD_ZVAL(rp);
array_init(rp);
add_assoc_string(rp, "mode", type, 1);
tags = php_mongo_make_tagsets(&link->servers->read_pref);
if (tags) {
add_assoc_zval(rp, "tags", tags);
}
make_special(cursor);
query = cursor->query;
add_assoc_zval(query, "$readPreference", rp);
}
int mongo_cursor__do_query(zval *this_ptr, zval *return_value TSRMLS_DC) {
mongo_cursor *cursor;
buffer buf;
zval *errmsg;
char *error_message;
mongoclient *link;
mongo_read_preference rp;
cursor = (mongo_cursor*)zend_object_store_get_object(getThis() TSRMLS_CC);
if (!cursor) {
zend_throw_exception(mongo_ce_Exception,
"The MongoCursor object has not been correctly initialized by its constructor",
0 TSRMLS_CC);
return FAILURE;
}
/* db connection resource */
link = (mongoclient*)zend_object_store_get_object(cursor->resource TSRMLS_CC);
if (!link->servers) {
zend_throw_exception(mongo_ce_Exception, "The Mongo object has not been correctly initialized by its constructor", 0 TSRMLS_CC);
return FAILURE;
}
/* If we had a connection we need to remove it from the callback map before
* we assign it another connection
*/
if (cursor->connection) {
mongo_deregister_callback_from_connection(cursor->connection, cursor);
}
/* Sets the wire protocol flag to allow reading from a secondary. The read
* preference spec states: "slaveOk remains as a bit in the wire protocol
* and drivers will set this bit to 1 for all reads except with PRIMARY
* read preference." */
cursor->opts = cursor->opts | (cursor->read_pref.type != MONGO_RP_PRIMARY ? CURSOR_FLAG_SLAVE_OKAY : 0);
/* store the link's read preference to backup, and overwrite with the cursors's read preferences */
mongo_read_preference_copy(&link->servers->read_pref, &rp);
mongo_read_preference_replace(&cursor->read_pref, &link->servers->read_pref);
/* TODO: We have to assume to use a read connection here, but it should