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THRIFT-999. php: Add TForkingServer

Patch: Nick Jones

git-svn-id: https://svn.apache.org/repos/asf/thrift/trunk@1063814 13f79535-47bb-0310-9956-ffa450edef68
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Bryan Duxbury
Bryan Duxbury committed Jan 26, 2011
1 parent e0498c9 commit c0e2ef50b7c27cd1023a264f208cd81a58e63668
Showing with 114 additions and 0 deletions.
  1. +114 −0 lib/php/src/server/TForkingServer.php
@@ -0,0 +1,114 @@
+<?php
+
+include_once $GLOBALS['THRIFT_ROOT'].'/server/TServer.php';
+
+/**
+ * A forking implementation of a Thrift server.
+ *
+ * @package thrift.server
+ */
+class TForkingServer extends TServer {
+ /**
+ * Flag for the main serving loop
+ *
+ * @var bool
+ */
+ private $stop_ = false;
+
+ /**
+ * List of children.
+ *
+ * @var array
+ */
+ private $children_ = array();
+
+ /**
+ * Listens for new client using the supplied
+ * transport. We fork when a new connection
+ * arrives.
+ *
+ * @return void
+ */
+ public function serve() {
+ $this->transport_->listen();
+
+ while (!$this->stop_) {
+ try {
+ $transport = $this->transport_->accept();
+
+ if ($transport != null) {
+ $pid = pcntl_fork();
+
+ if ($pid > 0) {
+ $this->handleParent($transport, $pid);
+ }
+ else if ($pid === 0) {
+ $this->handleChild($transport);
+ }
+ else {
+ throw new TException('Failed to fork');
+ }
+ }
+ }
+ catch (TTransportException $e) { }
+
+ $this->collectChildren();
+ }
+ }
+
+ /**
+ * Code run by the parent
+ *
+ * @param TTransport $transport
+ * @param int $pid
+ * @return void
+ */
+ private function handleParent(TTransport $transport, $pid) {
+ $this->children_[$pid] = $transport;
+ }
+
+ /**
+ * Code run by the child.
+ *
+ * @param TTransport $transport
+ * @return void
+ */
+ private function handleChild(TTransport $transport) {
+ try {
+ $inputTransport = $this->inputTransportFactory_->getTransport($transport);
+ $outputTransport = $this->outputTransportFactory_->getTransport($transport);
+ $inputProtocol = $this->inputProtocolFactory_->getProtocol($inputTransport);
+ $outputProtocol = $this->outputProtocolFactory_->getProtocol($outputTransport);
+ while ($this->processor_->process($inputProtocol, $outputProtocol)) { }
+ @$transport->close();
+ }
+ catch (TTransportException $e) { }
+
+ exit(0);
+ }
+
+ /**
+ * Collects any children we may have
+ *
+ * @return void
+ */
+ private function collectChildren() {
+ foreach ($this->children_ as $pid => $transport) {
+ if (pcntl_waitpid($pid, $status, WNOHANG) > 0) {
+ unset($this->children_[$pid]);
+ if ($transport) @$transport->close();
+ }
+ }
+ }
+
+ /**
+ * Stops the server running. Kills the transport
+ * and then stops the main serving loop
+ *
+ * @return void
+ */
+ public function stop() {
+ $this->transport_->close();
+ $this->stop_ = true;
+ }
+}

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