Jetpack_Sync_Queue::checkout_with_memory_limit() - Code Metrics - Inspection of "Update replicastore test and implementation from W..." - Automattic/jetpack - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — add/sync-action ( dd0c7e...dc704e )

unknown

created 2016-05-20 22:26 UTC

Jetpack_Sync_Queue::checkout_with_memory_limit() C

↳ Parent: Jetpack_Sync_Queue

Complexity

Conditions	8
Paths	8

Size

Total Lines	51
Code Lines	27

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	8
eloc	27
c	1
b	0
f	0
nc	8
nop	2
dl	0
loc	51
rs	6.5978

How to fix Long Method

<?php

/**
 * A buffer of items from the queue that can be checked out
 */
class Jetpack_Sync_Queue_Buffer {
	public $id;
	public $items_with_ids;

	public function __construct( $id, $items_with_ids ) {
		$this->id             = $id;
		$this->items_with_ids = $items_with_ids;
	}

	public function get_items() {
		return array_combine( $this->get_item_ids(), $this->get_item_values() );
	}

	public function get_item_values() {
		return Jetpack_Sync_Utils::get_item_values( $this->items_with_ids );
	}

	public function get_item_ids() {
		return Jetpack_Sync_Utils::get_item_ids( $this->items_with_ids );
	}
}

/**
 * A persistent queue that can be flushed in increments of N items,
 * and which blocks reads until checked-out buffers are checked in or
 * closed. This uses raw SQL for two reasons: speed, and not triggering
 * tons of added_option callbacks.
 */
class Jetpack_Sync_Queue {

	public $id;
	private $row_iterator;

	function __construct( $id ) {
		$this->id           = str_replace( '-', '_', $id ); // necessary to ensure we don't have ID collisions in the SQL
		$this->row_iterator = 0;
	}

	function add( $item ) {
		global $wpdb;
		$added = false;
		// this basically tries to add the option until enough time has elapsed that
		// it has a unique (microtime-based) option key
		while ( ! $added ) {
			$rows_added = $wpdb->query( $wpdb->prepare(
				"INSERT INTO $wpdb->options (option_name, option_value,autoload) VALUES (%s, %s,%s)",
				$this->get_next_data_row_option_name(),
				serialize( $item ),
				'no'
			) );
			$added      = ( $rows_added !== 0 );
		}
	}

	// Attempts to insert all the items in a single SQL query. May be subject to query size limits!
	function add_all( $items ) {
		global $wpdb;
		$base_option_name = $this->get_next_data_row_option_name();

		$query = "INSERT INTO $wpdb->options (option_name, option_value,autoload) VALUES ";

		$rows = array();

		for ( $i = 0; $i < count( $items ); $i += 1 ) {
for ($i=0; $i<count($array); $i++) { // calls count() on each iteration
}

// Better
for ($i=0, $c=count($array); $i<$c; $i++) { // calls count() just once
}
			$option_name  = esc_sql( $base_option_name . '-' . $i );
			$option_value = esc_sql( serialize( $items[ $i ] ) );
			$rows[]       = "('$option_name', '$option_value', 'no')";
		}

		$rows_added = $wpdb->query( $query . join( ',', $rows ) );

		if ( $rows_added !== count( $items ) ) {
			return new WP_Error( 'row_count_mismatch', "The number of rows inserted didn't match the size of the input array" );
		}
	}

	// Peek at the front-most item on the queue without checking it out
	function peek( $count = 1 ) {
		$items = $this->fetch_items( $count );
		if ( $items ) {
			return Jetpack_Sync_Utils::get_item_values( $items );
		}

		return array();
	}

	// lag is the difference in time between the age of the oldest item and the current time
	function lag() {
		global $wpdb;

		$last_item_name = $wpdb->get_var( $wpdb->prepare(
			"SELECT option_name FROM $wpdb->options WHERE option_name LIKE %s ORDER BY option_name ASC LIMIT 1",
			"jpsq_{$this->id}-%"
		) );

		if ( ! $last_item_name ) {
			return null;
		}

		// break apart the item name to get the timestamp
		$matches = null;
		if ( preg_match( '/^jpsq_' . $this->id . '-(\d+\.\d+)-/', $last_item_name, $matches ) ) {
			return microtime( true ) - floatval( $matches[1] );
		} else {
			return null;
		}
	}

	function reset() {
		global $wpdb;
		$this->delete_checkout_id();
		$wpdb->query( $wpdb->prepare(
			"DELETE FROM $wpdb->options WHERE option_name LIKE %s", "jpsq_{$this->id}-%"
		) );
	}

	function size() {
		global $wpdb;

		return (int) $wpdb->get_var( $wpdb->prepare(
			"SELECT count(*) FROM $wpdb->options WHERE option_name LIKE %s", "jpsq_{$this->id}-%"
		) );
	}

	// we use this peculiar implementation because it's much faster than count(*)
	function has_any_items() {
		global $wpdb;
		$value = $wpdb->get_var( $wpdb->prepare(
			"SELECT exists( SELECT option_name FROM $wpdb->options WHERE option_name LIKE %s )", "jpsq_{$this->id}-%"
		) );

		return ( $value === "1" );
	}

	function checkout( $buffer_size ) {
		if ( $this->get_checkout_id() ) {
			return new WP_Error( 'unclosed_buffer', 'There is an unclosed buffer' );
		}

		$buffer_id = uniqid();

		$result = $this->set_checkout_id( $buffer_id );

		if ( ! $result || is_wp_error( $result ) ) {
			return $result;
		}

		$items = $this->fetch_items( $buffer_size );

		if ( count( $items ) === 0 ) {
			return false;
		}

		$buffer = new Jetpack_Sync_Queue_Buffer( $buffer_id, array_slice( $items, 0, $buffer_size ) );

		return $buffer;
	}

	// this checks out rows until it either empties the queue or hits a certain memory limit
	// it loads the sizes from the DB first so that it doesn't accidentally
	// load more data into memory than it needs to.
	// The only way it will load more items than $max_size is if a single queue item 
	// exceeds the memory limit, but in that case it will send that item by itself.
	function checkout_with_memory_limit( $max_memory, $max_buffer_size = 500 ) {
		if ( $this->get_checkout_id() ) {
			return new WP_Error( 'unclosed_buffer', 'There is an unclosed buffer' );
		}

		$buffer_id = uniqid();

		$result = $this->set_checkout_id( $buffer_id );

		if ( ! $result || is_wp_error( $result ) ) {
			return $result;
		}

		// get the map of buffer_id -> memory_size
		global $wpdb;

		$items_with_size = $wpdb->get_results(
			$wpdb->prepare(
				"SELECT option_name AS id, LENGTH(option_value) AS value_size FROM $wpdb->options WHERE option_name LIKE %s ORDER BY option_name ASC LIMIT %d",
				"jpsq_{$this->id}-%",
				$max_buffer_size
			),
			OBJECT
		);

		$total_memory = 0;
		$item_ids     = array();

		foreach ( $items_with_size as $item_with_size ) {
			$total_memory += $item_with_size->value_size;

			// if this is the first item and it exceeds memory, allow loop to continue
			// we will exit on the next iteration instead
			if ( $total_memory > $max_memory && count( $item_ids ) > 0 ) {
				break;
			}
			$item_ids[] = $item_with_size->id;
		}

		$items = $this->fetch_items_by_id( $item_ids );

		if ( count( $items ) === 0 ) {
			$this->delete_checkout_id();

			return false;
		}

		$buffer = new Jetpack_Sync_Queue_Buffer( $buffer_id, $items );

		return $buffer;
	}

	function checkin( $buffer ) {
		$is_valid = $this->validate_checkout( $buffer );

		if ( is_wp_error( $is_valid ) ) {
			return $is_valid;
		}

		$this->delete_checkout_id();

		return true;
	}

	function close( $buffer, $ids_to_remove = null ) {
		$is_valid = $this->validate_checkout( $buffer );

		if ( is_wp_error( $is_valid ) ) {
			return $is_valid;
		}

		$this->delete_checkout_id();

		// by default clear all items in the buffer
		if ( is_null( $ids_to_remove ) ) {
			$ids_to_remove = $buffer->get_item_ids();
		}

		global $wpdb;

		if ( count( $ids_to_remove ) > 0 ) {
			$sql   = "DELETE FROM $wpdb->options WHERE option_name IN (" . implode( ', ', array_fill( 0, count( $ids_to_remove ), '%s' ) ) . ')';
			$query = call_user_func_array( array( $wpdb, 'prepare' ), array_merge( array( $sql ), $ids_to_remove ) );
			$wpdb->query( $query );
		}

		return true;
	}

	function flush_all() {
		$items = Jetpack_Sync_Utils::get_item_values( $this->fetch_items() );
		$this->reset();

		return $items;
	}

	function get_all() {
		return $this->fetch_items();
	}

	// use with caution, this could allow multiple processes to delete
	// and send from the queue at the same time
	function force_checkin() {
		$this->delete_checkout_id();
	}

	// used to lock checkouts from the queue.
	// tries to wait up to $timeout seconds for the queue to be empty
	function lock( $timeout = 30 ) {
		$tries = 0;

		while ( $this->has_any_items() && $tries < $timeout ) {
			sleep( 1 );
			$tries += 1;
		}

		if ( $tries === 30 ) {
			return new WP_Error( 'lock_timeout', 'Timeout waiting for sync queue to empty' );
		}

		if ( $this->get_checkout_id() ) {
			return new WP_Error( 'unclosed_buffer', 'There is an unclosed buffer' );
		}

		// hopefully this means we can acquire a checkout?
		$result = $this->set_checkout_id( 'lock' );

		if ( ! $result || is_wp_error( $result ) ) {
			return $result;
		}

		return true;
	}

	function unlock() {
		$this->delete_checkout_id();
	}

	private function get_checkout_id() {
		return get_transient( $this->get_checkout_transient_name() );
	}

	private function set_checkout_id( $checkout_id ) {
		return set_transient( $this->get_checkout_transient_name(), $checkout_id, 5 * 60 ); // 5 minute timeout
	}

	private function delete_checkout_id() {
		delete_transient( $this->get_checkout_transient_name() );
	}

	private function get_checkout_transient_name() {
		return "jpsq_{$this->id}_checkout";
	}

	private function get_next_data_row_option_name() {
		// this option is specifically chosen to, as much as possible, preserve time order
		// and minimise the possibility of collisions between multiple processes working 
		// at the same time
		// TODO: confirm we only need to support PHP 5.05+ (otherwise we'll need to emulate microtime as float, and avoid PHP_INT_MAX)

		// @see: http://php.net/manual/en/function.microtime.php
		$timestamp = sprintf( '%.6f', microtime( true ) );

		// row iterator is used to avoid collisions where we're writing data waaay fast in a single process
		if ( $this->row_iterator === PHP_INT_MAX ) {
			$this->row_iterator = 0;
		} else {
			$this->row_iterator += 1;
		}

		return 'jpsq_' . $this->id . '-' . $timestamp . '-' . getmypid() . '-' . $this->row_iterator;
	}

	private function fetch_items( $limit = null ) {
		global $wpdb;

		if ( $limit ) {
			$query_sql = $wpdb->prepare( "SELECT option_name AS id, option_value AS value FROM $wpdb->options WHERE option_name LIKE %s ORDER BY option_name ASC LIMIT %d", "jpsq_{$this->id}-%", $limit );
		} else {
			$query_sql = $wpdb->prepare( "SELECT option_name AS id, option_value AS value FROM $wpdb->options WHERE option_name LIKE %s ORDER BY option_name ASC", "jpsq_{$this->id}-%" );
		}

		$items = $wpdb->get_results( $query_sql, OBJECT );
		foreach ( $items as $item ) {
			$item->value = maybe_unserialize( $item->value );
		}

		return $items;
	}

	private function fetch_items_by_id( $item_ids ) {
		global $wpdb;

		if ( count( $item_ids ) > 0 ) {
			$sql   = "SELECT option_name AS id, option_value AS value FROM $wpdb->options WHERE option_name IN (" . implode( ', ', array_fill( 0, count( $item_ids ), '%s' ) ) . ') ORDER BY option_name ASC';
			$query = call_user_func_array( array( $wpdb, 'prepare' ), array_merge( array( $sql ), $item_ids ) );
			$items = $wpdb->get_results( $query, OBJECT );
			foreach ( $items as $item ) {
				$item->value = maybe_unserialize( $item->value );
			}

			return $items;
		} else {
			return array();
		}
	}

	private function validate_checkout( $buffer ) {
		if ( ! $buffer instanceof Jetpack_Sync_Queue_Buffer ) {
			return new WP_Error( 'not_a_buffer', 'You must checkin an instance of Jetpack_Sync_Queue_Buffer' );
		}

		$checkout_id = $this->get_checkout_id();

		if ( ! $checkout_id ) {
			return new WP_Error( 'buffer_not_checked_out', 'There are no checked out buffers' );
		}

		if ( $checkout_id != $buffer->id ) {
			return new WP_Error( 'buffer_mismatch', 'The buffer you checked in was not checked out' );
		}

		return true;
	}
}

class Jetpack_Sync_Utils {


	static function get_item_values( $items ) {
		return array_map( array( __CLASS__, 'get_item_value' ), $items );
	}

	static function get_item_ids( $items ) {
		return array_map( array( __CLASS__, 'get_item_id' ), $items );
	}

	static private function get_item_value( $item ) {

		return $item->value;
	}

	static private function get_item_id( $item ) {

		return $item->id;
	}
}


1			<?php
2
3			/**
4			* A buffer of items from the queue that can be checked out
5			*/
6			class Jetpack_Sync_Queue_Buffer {
7			public $id;
8			public $items_with_ids;
9
10			public function __construct( $id, $items_with_ids ) {
11			$this->id = $id;
12			$this->items_with_ids = $items_with_ids;
13			}
14
15			public function get_items() {
16			return array_combine( $this->get_item_ids(), $this->get_item_values() );
17			}
18
19			public function get_item_values() {
20			return Jetpack_Sync_Utils::get_item_values( $this->items_with_ids );
21			}
22
23			public function get_item_ids() {
24			return Jetpack_Sync_Utils::get_item_ids( $this->items_with_ids );
25			}
26			}
27
28			/**
29			* A persistent queue that can be flushed in increments of N items,
30			* and which blocks reads until checked-out buffers are checked in or
31			* closed. This uses raw SQL for two reasons: speed, and not triggering
32			* tons of added_option callbacks.
33			*/
34			class Jetpack_Sync_Queue {
			0 ignored issues – show Coding Style Compatibility introduced 2016-04-14 21:57 UTC by Report Bug Copy Issue Report PSR1 recommends that each class should be in its own file to aid autoloaders. Having each class in a dedicated file usually plays nice with PSR autoloaders and is therefore a well established practice. If you use other autoloaders, you might not want to follow this rule. Loading history...
35			public $id;
36			private $row_iterator;
37
38			function __construct( $id ) {
39			$this->id = str_replace( '-', '_', $id ); // necessary to ensure we don't have ID collisions in the SQL
40			$this->row_iterator = 0;
41			}
42
43			function add( $item ) {
44			global $wpdb;
45			$added = false;
46			// this basically tries to add the option until enough time has elapsed that
47			// it has a unique (microtime-based) option key
48			while ( ! $added ) {
49			$rows_added = $wpdb->query( $wpdb->prepare(
50			"INSERT INTO $wpdb->options (option_name, option_value,autoload) VALUES (%s, %s,%s)",
51			$this->get_next_data_row_option_name(),
52			serialize( $item ),
53			'no'
54			) );
55			$added = ( $rows_added !== 0 );
56			}
57			}
58
59			// Attempts to insert all the items in a single SQL query. May be subject to query size limits!
60			function add_all( $items ) {
61			global $wpdb;
62			$base_option_name = $this->get_next_data_row_option_name();
63
64			$query = "INSERT INTO $wpdb->options (option_name, option_value,autoload) VALUES ";
65
66			$rows = array();
67
68			for ( $i = 0; $i < count( $items ); $i += 1 ) {
			0 ignored issues – show Performance Best Practice introduced 2016-04-17 19:11 UTC by Report Bug Copy Issue Report It seems like you are calling the size function `count()` as part of the test condition. You might want to compute the size beforehand, and not on each iteration. If the size of the collection does not change during the iteration, it is generally a good practice to compute it beforehand, and not on each iteration: for ($i=0; $i<count($array); $i++) { // calls count() on each iteration } // Better for ($i=0, $c=count($array); $i<$c; $i++) { // calls count() just once } Loading history...
69			$option_name = esc_sql( $base_option_name . '-' . $i );
70			$option_value = esc_sql( serialize( $items[ $i ] ) );
71			$rows[] = "('$option_name', '$option_value', 'no')";
72			}
73
74			$rows_added = $wpdb->query( $query . join( ',', $rows ) );
75
76			if ( $rows_added !== count( $items ) ) {
77			return new WP_Error( 'row_count_mismatch', "The number of rows inserted didn't match the size of the input array" );
78			}
79			}
80
81			// Peek at the front-most item on the queue without checking it out
82			function peek( $count = 1 ) {
83			$items = $this->fetch_items( $count );
84			if ( $items ) {
85			return Jetpack_Sync_Utils::get_item_values( $items );
86			}
87
88			return array();
89			}
90
91			// lag is the difference in time between the age of the oldest item and the current time
92			function lag() {
93			global $wpdb;
94
95			$last_item_name = $wpdb->get_var( $wpdb->prepare(
96			"SELECT option_name FROM $wpdb->options WHERE option_name LIKE %s ORDER BY option_name ASC LIMIT 1",
97			"jpsq_{$this->id}-%"
98			) );
99
100			if ( ! $last_item_name ) {
101			return null;
102			}
103
104			// break apart the item name to get the timestamp
105			$matches = null;
106			if ( preg_match( '/^jpsq_' . $this->id . '-(\d+\.\d+)-/', $last_item_name, $matches ) ) {
107			return microtime( true ) - floatval( $matches[1] );
108			} else {
109			return null;
110			}
111			}
112
113			function reset() {
114			global $wpdb;
115			$this->delete_checkout_id();
116			$wpdb->query( $wpdb->prepare(
117			"DELETE FROM $wpdb->options WHERE option_name LIKE %s", "jpsq_{$this->id}-%"
118			) );
119			}
120
121			function size() {
122			global $wpdb;
123
124			return (int) $wpdb->get_var( $wpdb->prepare(
125			"SELECT count(*) FROM $wpdb->options WHERE option_name LIKE %s", "jpsq_{$this->id}-%"
126			) );
127			}
128
129			// we use this peculiar implementation because it's much faster than count(*)
130			function has_any_items() {
131			global $wpdb;
132			$value = $wpdb->get_var( $wpdb->prepare(
133			"SELECT exists( SELECT option_name FROM $wpdb->options WHERE option_name LIKE %s )", "jpsq_{$this->id}-%"
134			) );
135
136			return ( $value === "1" );
137			}
138
139			function checkout( $buffer_size ) {
140			if ( $this->get_checkout_id() ) {
141			return new WP_Error( 'unclosed_buffer', 'There is an unclosed buffer' );
142			}
143
144			$buffer_id = uniqid();
145
146			$result = $this->set_checkout_id( $buffer_id );
147
148			if ( ! $result \|\| is_wp_error( $result ) ) {
149			return $result;
150			}
151
152			$items = $this->fetch_items( $buffer_size );
153
154			if ( count( $items ) === 0 ) {
155			return false;
156			}
157
158			$buffer = new Jetpack_Sync_Queue_Buffer( $buffer_id, array_slice( $items, 0, $buffer_size ) );
159
160			return $buffer;
161			}
162
163			// this checks out rows until it either empties the queue or hits a certain memory limit
164			// it loads the sizes from the DB first so that it doesn't accidentally
165			// load more data into memory than it needs to.
166			// The only way it will load more items than $max_size is if a single queue item
167			// exceeds the memory limit, but in that case it will send that item by itself.
168			function checkout_with_memory_limit( $max_memory, $max_buffer_size = 500 ) {
169			if ( $this->get_checkout_id() ) {
170			return new WP_Error( 'unclosed_buffer', 'There is an unclosed buffer' );
171			}
172
173			$buffer_id = uniqid();
174
175			$result = $this->set_checkout_id( $buffer_id );
176
177			if ( ! $result \|\| is_wp_error( $result ) ) {
178			return $result;
179			}
180
181			// get the map of buffer_id -> memory_size
182			global $wpdb;
183
184			$items_with_size = $wpdb->get_results(
185			$wpdb->prepare(
186			"SELECT option_name AS id, LENGTH(option_value) AS value_size FROM $wpdb->options WHERE option_name LIKE %s ORDER BY option_name ASC LIMIT %d",
187			"jpsq_{$this->id}-%",
188			$max_buffer_size
189			),
190			OBJECT
191			);
192
193			$total_memory = 0;
194			$item_ids = array();
195
196			foreach ( $items_with_size as $item_with_size ) {
197			$total_memory += $item_with_size->value_size;
198
199			// if this is the first item and it exceeds memory, allow loop to continue
200			// we will exit on the next iteration instead
201			if ( $total_memory > $max_memory && count( $item_ids ) > 0 ) {
202			break;
203			}
204			$item_ids[] = $item_with_size->id;
205			}
206
207			$items = $this->fetch_items_by_id( $item_ids );
208
209			if ( count( $items ) === 0 ) {
210			$this->delete_checkout_id();
211
212			return false;
213			}
214
215			$buffer = new Jetpack_Sync_Queue_Buffer( $buffer_id, $items );
216
217			return $buffer;
218			}
219
220			function checkin( $buffer ) {
221			$is_valid = $this->validate_checkout( $buffer );
222
223			if ( is_wp_error( $is_valid ) ) {
224			return $is_valid;
225			}
226
227			$this->delete_checkout_id();
228
229			return true;
230			}
231
232			function close( $buffer, $ids_to_remove = null ) {
233			$is_valid = $this->validate_checkout( $buffer );
234
235			if ( is_wp_error( $is_valid ) ) {
236			return $is_valid;
237			}
238
239			$this->delete_checkout_id();
240
241			// by default clear all items in the buffer
242			if ( is_null( $ids_to_remove ) ) {
243			$ids_to_remove = $buffer->get_item_ids();
244			}
245
246			global $wpdb;
247
248			if ( count( $ids_to_remove ) > 0 ) {
249			$sql = "DELETE FROM $wpdb->options WHERE option_name IN (" . implode( ', ', array_fill( 0, count( $ids_to_remove ), '%s' ) ) . ')';
250			$query = call_user_func_array( array( $wpdb, 'prepare' ), array_merge( array( $sql ), $ids_to_remove ) );
251			$wpdb->query( $query );
252			}
253
254			return true;
255			}
256
257			function flush_all() {
258			$items = Jetpack_Sync_Utils::get_item_values( $this->fetch_items() );
259			$this->reset();
260
261			return $items;
262			}
263
264			function get_all() {
265			return $this->fetch_items();
266			}
267
268			// use with caution, this could allow multiple processes to delete
269			// and send from the queue at the same time
270			function force_checkin() {
271			$this->delete_checkout_id();
272			}
273
274			// used to lock checkouts from the queue.
275			// tries to wait up to $timeout seconds for the queue to be empty
276			function lock( $timeout = 30 ) {
277			$tries = 0;
278
279			while ( $this->has_any_items() && $tries < $timeout ) {
280			sleep( 1 );
281			$tries += 1;
282			}
283
284			if ( $tries === 30 ) {
285			return new WP_Error( 'lock_timeout', 'Timeout waiting for sync queue to empty' );
286			}
287
288			if ( $this->get_checkout_id() ) {
289			return new WP_Error( 'unclosed_buffer', 'There is an unclosed buffer' );
290			}
291
292			// hopefully this means we can acquire a checkout?
293			$result = $this->set_checkout_id( 'lock' );
294
295			if ( ! $result \|\| is_wp_error( $result ) ) {
296			return $result;
297			}
298
299			return true;
300			}
301
302			function unlock() {
303			$this->delete_checkout_id();
304			}
305
306			private function get_checkout_id() {
307			return get_transient( $this->get_checkout_transient_name() );
308			}
309
310			private function set_checkout_id( $checkout_id ) {
311			return set_transient( $this->get_checkout_transient_name(), $checkout_id, 5 * 60 ); // 5 minute timeout
312			}
313
314			private function delete_checkout_id() {
315			delete_transient( $this->get_checkout_transient_name() );
316			}
317
318			private function get_checkout_transient_name() {
319			return "jpsq_{$this->id}_checkout";
320			}
321
322			private function get_next_data_row_option_name() {
323			// this option is specifically chosen to, as much as possible, preserve time order
324			// and minimise the possibility of collisions between multiple processes working
325			// at the same time
326			// TODO: confirm we only need to support PHP 5.05+ (otherwise we'll need to emulate microtime as float, and avoid PHP_INT_MAX)
			0 ignored issues – show Coding Style Best Practice introduced 2016-04-19 19:44 UTC by Report Bug Copy Issue Report Comments for TODO tasks are often forgotten in the code; it might be better to use a dedicated issue tracker. Loading history...
327			// @see: http://php.net/manual/en/function.microtime.php
328			$timestamp = sprintf( '%.6f', microtime( true ) );
329
330			// row iterator is used to avoid collisions where we're writing data waaay fast in a single process
331			if ( $this->row_iterator === PHP_INT_MAX ) {
332			$this->row_iterator = 0;
333			} else {
334			$this->row_iterator += 1;
335			}
336
337			return 'jpsq_' . $this->id . '-' . $timestamp . '-' . getmypid() . '-' . $this->row_iterator;
338			}
339
340			private function fetch_items( $limit = null ) {
341			global $wpdb;
342
343			if ( $limit ) {
344			$query_sql = $wpdb->prepare( "SELECT option_name AS id, option_value AS value FROM $wpdb->options WHERE option_name LIKE %s ORDER BY option_name ASC LIMIT %d", "jpsq_{$this->id}-%", $limit );
345			} else {
346			$query_sql = $wpdb->prepare( "SELECT option_name AS id, option_value AS value FROM $wpdb->options WHERE option_name LIKE %s ORDER BY option_name ASC", "jpsq_{$this->id}-%" );
347			}
348
349			$items = $wpdb->get_results( $query_sql, OBJECT );
350			foreach ( $items as $item ) {
351			$item->value = maybe_unserialize( $item->value );
352			}
353
354			return $items;
355			}
356
357			private function fetch_items_by_id( $item_ids ) {
358			global $wpdb;
359
360			if ( count( $item_ids ) > 0 ) {
361			$sql = "SELECT option_name AS id, option_value AS value FROM $wpdb->options WHERE option_name IN (" . implode( ', ', array_fill( 0, count( $item_ids ), '%s' ) ) . ') ORDER BY option_name ASC';
362			$query = call_user_func_array( array( $wpdb, 'prepare' ), array_merge( array( $sql ), $item_ids ) );
363			$items = $wpdb->get_results( $query, OBJECT );
364			foreach ( $items as $item ) {
365			$item->value = maybe_unserialize( $item->value );
366			}
367
368			return $items;
369			} else {
370			return array();
371			}
372			}
373
374			private function validate_checkout( $buffer ) {
375			if ( ! $buffer instanceof Jetpack_Sync_Queue_Buffer ) {
376			return new WP_Error( 'not_a_buffer', 'You must checkin an instance of Jetpack_Sync_Queue_Buffer' );
377			}
378
379			$checkout_id = $this->get_checkout_id();
380
381			if ( ! $checkout_id ) {
382			return new WP_Error( 'buffer_not_checked_out', 'There are no checked out buffers' );
383			}
384
385			if ( $checkout_id != $buffer->id ) {
386			return new WP_Error( 'buffer_mismatch', 'The buffer you checked in was not checked out' );
387			}
388
389			return true;
390			}
391			}
392
393			class Jetpack_Sync_Utils {
			0 ignored issues – show Coding Style Compatibility introduced 2016-04-19 21:52 UTC by Report Bug Copy Issue Report PSR1 recommends that each class should be in its own file to aid autoloaders. Having each class in a dedicated file usually plays nice with PSR autoloaders and is therefore a well established practice. If you use other autoloaders, you might not want to follow this rule. Loading history...
394
395			static function get_item_values( $items ) {
396			return array_map( array( __CLASS__, 'get_item_value' ), $items );
397			}
398
399			static function get_item_ids( $items ) {
400			return array_map( array( __CLASS__, 'get_item_id' ), $items );
401			}
402
403			static private function get_item_value( $item ) {
			0 ignored issues – show Coding Style introduced 2016-04-19 21:52 UTC by Report Bug Copy Issue Report As per PSR2, the `static` declaration should come after the visibility declaration. Loading history...
404			return $item->value;
405			}
406
407			static private function get_item_id( $item ) {
			0 ignored issues – show Coding Style introduced 2016-04-19 21:52 UTC by Report Bug Copy Issue Report As per PSR2, the `static` declaration should come after the visibility declaration. Loading history...
408			return $item->id;
409			}
410			}
411

Automattic / jetpack

Push — add/sync-action ( dd0c7e...dc704e )

Jetpack_Sync_Queue::checkout_with_memory_limit() C

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