Redis Simple Message Queue

A lightweight message queue for PHP that requires no dedicated queue server. Just a Redis server.

PHP implementation of smrchy/rsmq

Installation

composer require eislambey/rsmq

Methods

Construct

Creates a new instance of RSMQ.

Parameters:

• $redis (Redis): *required The Redis instance
• $ns (string): optional (Default: "rsmq") The namespace prefix used for all keys created by RSMQ
• $realtime (Boolean): optional (Default: false) Enable realtime PUBLISH of new messages

Example:

<?php

$redis = new Redis();
$redis->connect('127.0.0.1', 6379);
$rsmq = new \Islambey\RSMQ\RSMQ($redis);

Queue

createQueue

Create a new queue.

Parameters:

• $name (string): The Queue name. Maximum 160 characters; alphanumeric characters, hyphens (-), and underscores (_) are allowed.
• $vt (int): optional (Default: 30) The length of time, in seconds, that a message received from a queue will be invisible to other receiving components when they ask to receive messages. Allowed values: 0-9999999 (around 115 days)
• $delay (int): optional (Default: 0) The time in seconds that the delivery of all new messages in the queue will be delayed. Allowed values: 0-9999999 (around 115 days)
• $maxsize (int): optional (Default: 65536) The maximum message size in bytes. Allowed values: 1024-65536 and -1 (for unlimited size)

Returns:

• true (Bool)

Throws:

• \Islambey\RSMQ\Exception

Example:

<?php

$rsmq->createQueue('myqueue');

listQueues

List all queues

Returns an array:

• ["qname1", "qname2"]

Example:

<?php

$queues = $rsmq->listQueues();

deleteQueue

Deletes a queue and all messages.

Parameters:

• $name (string): The Queue name.

Returns:

• true (Bool)

Throws:

• \Islambey\RSMQ\Exception

Example:

<?php

$rsmq->deleteQueue('myqueue');

getQueueAttributes

Get queue attributes, counter and stats

Parameters:

• $queue (string): The Queue name.

Returns an associative array:

• vt (int): The visibility timeout for the queue in seconds
• delay (int): The delay for new messages in seconds
• maxsize (int): The maximum size of a message in bytes
• totalrecv (int): Total number of messages received from the queue
• totalsent (int): Total number of messages sent to the queue
• created (float): Timestamp (epoch in seconds) when the queue was created
• modified (float): Timestamp (epoch in seconds) when the queue was last modified with setQueueAttributes
• msgs (int): Current number of messages in the queue
• hiddenmsgs (int): Current number of hidden / not visible messages. A message can be hidden while "in flight" due to a vt parameter or when sent with a delay

Example:

<?php

$attributes =  $rsmq->getQueueAttributes('myqueue');
echo "visibility timeout: ", $attributes['vt'], "\n";
echo "delay for new messages: ", $attributes['delay'], "\n";
echo "max size in bytes: ", $attributes['maxsize'], "\n";
echo "total received messages: ", $attributes['totalrecv'], "\n";
echo "total sent messages: ", $attributes['totalsent'], "\n";
echo "created: ", $attributes['created'], "\n";
echo "last modified: ", $attributes['modified'], "\n";
echo "current n of messages: ", $attributes['msgs'], "\n";
echo "hidden messages: ", $attributes['hiddenmsgs'], "\n";

setQueueAttributes

Sets queue parameters.

Parameters:

• $queue (string): The Queue name.
• $vt (int): optional * The length of time, in seconds, that a message received from a queue will be invisible to other receiving components when they ask to receive messages. Allowed values: 0-9999999 (around 115 days)
• $delay (int): optional The time in seconds that the delivery of all new messages in the queue will be delayed. Allowed values: 0-9999999 (around 115 days)
• $maxsize (int): optional The maximum message size in bytes. Allowed values: 1024-65536 and -1 (for unlimited size)

Note: At least one attribute (vt, delay, maxsize) must be supplied. Only attributes that are supplied will be modified.

Returns an associative array:

• vt (int): The visibility timeout for the queue in seconds
• delay (int): The delay for new messages in seconds
• maxsize (int): The maximum size of a message in bytes
• totalrecv (int): Total number of messages received from the queue
• totalsent (int): Total number of messages sent to the queue
• created (float): Timestamp (epoch in seconds) when the queue was created
• modified (float): Timestamp (epoch in seconds) when the queue was last modified with setQueueAttributes
• msgs (int): Current number of messages in the queue
• hiddenmsgs (int): Current number of hidden / not visible messages. A message can be hidden while "in flight" due to a vt parameter or when sent with a delay

Throws:

• \Islambey\RSMQ\Exception

Example:

<?php

$queue = 'myqueue';
$vt = 50;
$delay = 10;
$maxsize = 2048;
$rsmq->setQueueAttributes($queue, $vt, $delay, $maxsize)

Messages

sendMessage

Sends a new message.

Parameters:

• $queue (string)
• $message (string)
• $delay (int): optional (Default: queue settings) The time in seconds that the delivery of the message will be delayed. Allowed values: 0-9999999 (around 115 days)

Returns:

• $id (string): The internal message id.

Throws:

• \Islambey\RSMQ\Exception

Example:

<?php

$id = $rsmq->sendMessage('myqueue', 'a message');
echo "Message Sent. ID: ", $id;

receiveMessage

Receive the next message from the queue.

Parameters:

• $queue (string): The Queue name.
• $vt (int): optional (Default: queue settings) The length of time, in seconds, that the received message will be invisible to others. Allowed values: 0-9999999 (around 115 days)

Returns an associative array:

• message (string): The message's contents.
• id (string): The internal message id.
• sent (int): Timestamp of when this message was sent / created.
• fr (int): Timestamp of when this message was first received.
• rc (int): Number of times this message was received.

Note: Will return an empty array if no message is there

Throws:

• \Islambey\RSMQ\Exception

Example:

<?php

$message = $rsmq->receiveMessage('myqueue');
echo "Message ID: ", $message['id'];
echo "Message: ", $message['message'];

deleteMessage

Parameters:

• $queue (string): The Queue name.
• $id (string): message id to delete.

Returns:

• true if successful, false if the message was not found (bool).

Throws:

• \Islambey\RSMQ\Exception

Example:

<?php

$id = $rsmq->sendMessage('queue', 'a message');
$rsmq->deleteMessage($id);

popMessage

Receive the next message from the queue and delete it.

Important: This method deletes the message it receives right away. There is no way to receive the message again if something goes wrong while working on the message.

Parameters:

• $queue (string): The Queue name.

Returns an associvative array:

• message (string): The message's contents.
• id (string): The internal message id.
• sent (int): Timestamp of when this message was sent / created.
• fr (int): Timestamp of when this message was first received.
• rc (int): Number of times this message was received.

Note: Will return an empty object if no message is there

Throws:

• \Islambey\RSMQ\Exception

Example:

<?php

$message = $rsmq->popMessage('myqueue');
echo "Message ID: ", $message['id'];
echo "Message: ", $message['message'];

changeMessageVisibility

Change the visibility timer of a single message. The time when the message will be visible again is calculated from the current time (now) + vt.

Parameters:

• qname (string): The Queue name.
• id (string): The message id.
• vt (int): The length of time, in seconds, that this message will not be visible. Allowed values: 0-9999999 (around 115 days)

Returns:

• true if successful, false if the message was not found (bool).

Throws:

• \Islambey\RSMQ\Exception

Example:

<?php

$queue = 'myqueue';
$id = $rsmq->sendMessage($queue, 'a message');
if($rsmq->changeMessageVisibility($queue, $id, 60)) {
	echo "Message hidden for 60 secs";
}

LICENSE

The MIT LICENSE. See LICENSE