PHP AMQP Message Queuing RabbitMQ exchanger Type direct connection (iii) _php tutorial

1, Amqp_ex_type_direct: direct-Connect type

Direct-connect type also includes: 1 pairs of 1 and 1 pairs n (n-to-1, n-N)

The Receive-side receive.php code is as follows

 
  Connect (), $channel = new Amqpchannel ($connect), $exchange = new Amqpexchange ($channel); $exchange->setname (' Exchange '), $exchange->settype (amqp_ex_type_direct), $exchange->declare (), $queue = new Amqpqueue ($channel); Queue->setname (' logs '); $queue->declare (); $queue->bind (' Exchange ', ' logs '); while (true) {    $queue- Consume (' callback ');} $connection->close (); function callback ($envelope, $queue) {    var_dump ($envelope->getbody ());    $queue->nack ($envelope->getdeliverytag ());}

The sending side send.php code is as follows

 
  Connect (), $channel = new Amqpchannel ($connect), $exchange = new Amqpexchange ($channel); $exchange->setname (' Exchange '), $exchange->settype (amqp_ex_type_direct), $exchange->declare (), $exchange->publish (' DIRECT Type test ', ' logs '); Var_dump ("Send Message OK"); $connect->disconnect ();

Run results




Create receive_one.php and receive_two.php and change the send.php code to code like this to allow us to watch receive_one.php and receive_two.php code the same or run multiple receivers with DOS

 
  Connect (), $channel = new Amqpchannel ($connect), $exchange = new Amqpexchange ($channel); $exchange->setname (' Exchange '), $exchange->settype (amqp_ex_type_direct), $exchange->declare (), $queue = new Amqpqueue ($channel); Queue->setname (' logs '); @ $queue->declare (); $queue->bind (' Exchange ', ' logs '); while (true) {    $queue- >consume (' callback ');} $connection->close (); function callback ($envelope, $queue) {    var_dump ($envelope->getbody ());    $queue->nack ($envelope->getdeliverytag ());}

send.php

 
  Connect (), $channel = new Amqpchannel ($connect), $exchange = new Amqpexchange ($channel); $exchange->setname (' Exchange '); $exchange->settype (Amqp_ex_type_direct); $exchange->declare (); for ($index = 1; $index < 5; $index + +) {    $exchange->publish ($index, ' logs ');    Var_dump ("Send: $index");} $exchange->delete (); $connect->disconnect ();

The operation results are as follows

Queues will assign messages to each receive-side allocation process it seems perfect, but if you want to handle different tasks better, you need to Fair Dispatch
For example, when 1, 3 are processed by simple people 2, 4 are the complex task of processing if the task is too much receive_one.php is idle and receive_two.php is a heavy task we carried out the following test send.php changed to 5 50

for ($index = 1; $index < $index + +) {    $exchange->publish ($index, ' logs ');    Var_dump ("Send: $index");}

receive_two.php plus sleep (3)

function callback ($envelope, $queue) {    var_dump ($envelope->getbody ());    Sleep (3);    $queue->nack ($envelope->getdeliverytag ());}

We run the program with the following results


Receive_one all run out and Receive_two only run one after Receive_one has been idle we can set $channel->setprefetchcount (1) on the receiving end;
The task does not receive new messages before they are completed send messages to other receivers
The following receive_one.php and receive_two.php

$channel = new Amqpchannel ($connect);

Change to the following

$channel = new Amqpchannel ($connect); $channel->setprefetchcount (1);

http://www.bkjia.com/PHPjc/735888.html www.bkjia.com true http://www.bkjia.com/PHPjc/735888.html techarticle 1, Amqp_ex_type_direct: direct-connected direct type also includes: 1 pairs of 1 and 1 pairs n (n to 1, n to N) receive end receive.php code as follows connect (); $channel = new Amqpchannel ($ Connect); $exchange .

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