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Intro

A php client for Nats Streaming Server.

Uses phpnats under the hood and closesly resembles it's api.

Requirements

• php 5.6+
• stan

Installation

Get composer:

curl -O http://getcomposer.org/composer.phar && chmod +x composer.phar

Add php-nats-streaming as a dependency to your project

php composer.phar require 'byrnedo/php-nats-streaming:^0.2.4'

Usage

Publish

$options = new \NatsStreaming\ConnectionOptions();
$options->setClientID("test");
$options->setClusterID("test-cluster");
$c = new \NatsStreaming\Connection($options);

$c->connect();

// Publish
$r = $c->publish('special.subject', 'some serialized payload...');

// optionally wait for the ack
$gotAck = $r->wait();
if (!$gotAck) {
    ...
}

$c->close();

Note

If publishing many messages at a time, you might at first do this:

foreach ($req as $data){
    $r = $c->publish(...);
    $gotAck = $r->wait();
    if (!$gotAck) {
        ...
    }
}

It's actually much faster to do the following:

$rs = [];
foreach ($req as $data){
    $rs[] = $c->publish(...);
}

foreach ($rs as $r){
    $r->wait();
}

Subscribe

$options = new \NatsStreaming\ConnectionOptions();
$c = new \NatsStreaming\Connection($options);

$c->connect();

$subOptions = new \NatsStreaming\SubscriptionOptions();
$subOptions->setStartAt(\NatsStreamingProtos\StartPosition::First());

$sub = $c->subscribe('special.subject', function ($message) {
    // implement
}, $subOptions);

$sub->wait(1);

// not explicitly needed
$sub->unsubscribe(); // or $sub->close();

$c->close();

If you want to subscribe to multiple channels you can use $c->wait():

...

$c->connect();

...

$sub = $c->subscribe('special.subject', function ($message) {
    // implement
}, $subOptions);
$sub2 = $c->subscribe('special.subject', function ($message) {
    // implement
}, $subOptions);

$c->wait();

Queue Group Subscribe

$options = new \NatsStreaming\ConnectionOptions();
$c = new \NatsStreaming\Connection($options);

$c->connect();

$subOptions = new \NatsStreaming\SubscriptionOptions();
$sub = $c->queueSubscribe('specialer.subject', 'workgroup', function ($message) {
    // implement
}, $subOptions);


$sub->wait(1);

// not explicitly needed
$sub->close(); // or $sub->unsubscribe();

$c->close();

Manual Ack

$options = new \NatsStreaming\ConnectionOptions();
$c = new \NatsStreaming\Connection($options);

$c->connect();

$subOptions = new \NatsStreaming\SubscriptionOptions();
$subOptions->setManualAck(true);

$sub = $c->subscribe('special.subject', function ($message) {
    $message->ack();
}, $subOptions);

$sub->wait(1);

$c->close();

License

MIT, see LICENSE