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Building A Firehose - PHPNW
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Ian Barber
October 06, 2012
Technology
2
940
Building A Firehose - PHPNW
#phpnw12 version of my talk on building firehose style streaming data systems
Ian Barber
October 06, 2012
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Transcript
+Ian Barber - ianb@php.net - @ianbarber https://github.com/ianbarber/Firehose-PHP-Talk BUILDING A FIREHOSE
FILTERABLE REAL TIME STREAMING DATA
SELLING DATA ANALYSIS & DECISIONS USER TOOLS $£¥ ☑☒
DATA SOURCES COMPOSE latency AUGMENT STORE FILTER STREAM
EVENT SAMPLE order tweet temperature snapshot
Data Source Data Source Data Source Output
Data Source Data Source Data Source Output Output
Data Source Data Source Data Source Output Messaging Batch HTTP
Logs HTTP Chunked Websockets Batched POST
APACHE PHP APACHE PHP NODE.JS PUSH ZEROMQ PULL HTTP POST
WEBSOCKETS
APACHE PHP APACHE PHP HTTP POST function sendPos() { navigator.geolocation.getCurrentPosition(
function(pos) { $.ajax({ type: 'POST', url:'http://firehose.com/input.php', data: {lat: pos.coords.latitude, lon: pos.coords.longitude}}); }); setTimeout(sendPos, 60000); } sendPos(); location.php
APACHE PHP APACHE PHP PUSH ZEROMQ WEBSOCKETS $ctx = new
ZMQContext(); $sock = $ctx->getSocket(ZMQ::SOCKET_PUSH); $sock->connect("tcp://localhost:5566"); $data = array( 'id' => get_next_msg_id(), 'uid' => $_COOKIE['uid'], 'lat' => $_POST['lat'], 'lon' => $_POST['lon'] ); $sock->send(json_encode($data)); input.php
APACHE PHP APACHE PHP NODE.JS ZEROMQ PULL WEBSOCKETS app=require('http').createServer(handler), io
= require('socket.io').listen(app), zmq = require('zmq'), sock = zmq.socket('pull'); app.listen(8080); sock.bind('tcp://*:5566'); sock.on('message', function (msg) { var data = JSON.parse(msg); // send to all clients io.sockets.emit("position", event); }); output.js
PHP DAEMON PHP DAEMON NODE.JS PUSH ZEROMQ PULL HTTP STREAM
WEBSOCKETS $fh = fopen("https://".$user.":". $pass."@stream.twitter.com/1/statuses/ filter.json?track=".$search, "r"); while(!feof($fh)) { $d = fgets($fh); if(strlen($d) > 4) { $sock->send($d); } } twitter.php
Data Source Data Source Output Assemble Process Process
SOURCE ASSEMBLE PHP PHP ZEROMQ PUB SUB SUB SUB REDIS
ZEROMQ PUSH
SOURCE PHP ZEROMQ PUB SUB REDIS $ctx = new ZMQContext();
$sub = $ctx->getSocket(ZMQ::SOCKET_SUB); $sub->setSockOpt(ZMQ::SOCKOPT_SUBSCRIBE,""); $sub->connect("tcp://localhost:5577"); while( $dat = $sub->recv() ) { $aug = augment(json_decode($dat,true),$obj); $redis->lpush($dat['id'],json_encode($aug)); } augmentor.php
$mongo = new Mongo(); $collection = $m->starbucks->locations; function augment($data, $collection)
{ $loc = array((float) $data['lon'], (float) $data['lat']); $res = $collection->findOne(array( 'loc' => array('$near' => $loc))); return array('name' => 'starbucks', 'val' => $res['street']); } SOURCE PHP REDIS starbucks.php DB
$ld = new Text_LanguageDetect(); $ld->setNameMode(2); function augment($data, $ld) { /*
["en"]=> float(0.24702222222222) */ $names = $ld->detect($data['text'], 1); return array('name' => 'lang', 'val' => key($names)); } SOURCE PHP REDIS langdetect.php
$zk = new Zookeeper(); $zk->connect("localhost:2181"); SOURCE ASSEMBLE PHP PHP REDIS
PHP ZOOKEEPER COUNT OF SERVICES
$zk->create( $path . "/" . uniqid(), NULL, array( array( "perms"
=> Zookeeper::PERM_ALL, "scheme" => "world", "id" => "anyone")), Zookeeper::EPHEMERAL); PHP ZOOKEEPER augmentor.php
REASSEMBLE SOURCE REDIS ZOOKEEPER define("TIMEOUT", 5); $ch = $zk->getChildren("/services"); $servs
= count($ch); COUNT
REASSEMBLE while($dat = $sub->recv()){ do { $start = microtime(true); $aug
= $redis->brpop($dat['id'],$time)); if(count($aug)) $dat['aug'][] = $aug; $time -= microtime(true) - $start; } while($time > 0 && count($dat['aug']) != $servs); $out->send(json_encode($dat)); //forward } COUNT reassemble.php
Data Source Data Source Output Assemble Process Process Filter Filter
Filter
FILTER ELASTIC SEARCH QUERY - NAME QUERY - NAME MSG
? ? MSG ZEROMQ SUB ZEROMQ PUB TOPIC MSG TOPIC MSG TOPIC MSG ZEROMQ PULL QUERY - NAME MSG HTTP / REST
ELASTIC SEARCH QUERY - NAME QUERY - NAME MSG MSG
HTTP / REST function escall($server, $path, $param) { $context = stream_context_create( array('http' => $http)); $result = file_get_contents( $serv.'/'.$path, NULL, $context); return json_decode( $result ); } elasticsearch.php
ELASTIC SEARCH QUERY - NAME QUERY - NAME MSG MSG
HTTP / REST function percolate($host, $path, $tweet) { $path = "/twitter/tweet/_percolate"; $tweet = array('doc' => array( 'tweet' => $tweet['text'])); $match = escall($host, $path, array('content' => json_encode($tweet))); return $match['matches']; } elasticsearch.php
// snip... creating in, ctl, out ZMQ socks $poll =
new ZMQPoll(); $poll->add($in, ZMQ::POLL_IN); $poll->add($ctl, ZMQ::POLL_IN); $read = $write = array(); FILTER MSG ZEROMQ PULL QUERY - NAME ZEROMQ SUB elasticsearch.php
while(true) { $ev = $poll->poll($read, $write, -1); if($read[0] === $in)
{ $msg = json_decode( $in->recv() ); $matches = percolate($host, $msg); foreach($matches as $match) { $out->sendMulti(array($match, $msg)); } } else if($read[0] === $ctl) { $q = json_decode($ctl->recv()); $name = $q['name']; $query = $q['query']; add_query($host, $name,$query); } } elasticsearch.php
Data Source Output Queue Process Filter Data Store Data Store
STORE PHP KAFKA TOPIC TOPIC 1 2 3 4 1
2 3 4 SUB APACHE PHP CLIENT HTTP GET TOPIC - OFFSET
PHP KAFKA TOPIC TOPIC 1 2 3 4 1 2
3 4 SUB $k = new Kafka_Producer("localhost", 9092); while ($data = $in->recvMulti()) { $topic = $data[0]; $msg = $data[1]; $bytes = $k->send(array($msg), $topic); } kafkastore.php
$consumer = new Kafka_SimpleConsumer( 'localhost', 9092, 1, $max); do {
$msgs = $consumer->fetch( new Kafka_FetchRequest($top,0,$os,$max) ); foreach($msgs as $msg) echo $msg->payload(), "\n"; $offset += $msgs->validBytes(); } while($msgs->validBytes() > 0); echo json_encode(array("offset"=>$offset)); kafkaconsume.php KAFKA TOPIC TOPIC 1 2 3 4 1 2 3 4 APACHE PHP CLIENT GET
OPS
JSON & MSGPACK $data = array('id'=>1,'a'=>'a','b'=>'xyz', 'c' => array(1, 2,
"abcdefg", array(5, 7, 8))); $enc = json_encode($data); var_dump( json_decode($enc) ); $enc = msgpack_pack($data); var_dump( msgpack_unpack($enc) ); JSON MSGPACK MSGPACK JSON
Data Source Output Queue Process Filter Data Store Tap Trace
Trace Trace
Data Source Output See Also: http://slidesha.re/JaWE78
+Ian Barber - ianb@php.net - @ianbarber https://github.com/ianbarber/Firehose-PHP-Talk THANKS!