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<?php
/**
* Selenium server manager
*
* @file
* @ingroup Testing
* Copyright (C) 2010 Dan Nessett <dnessett@yahoo.com>
* http://citizendium.org/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
* http://www.gnu.org/copyleft/gpl.html
*/
class SeleniumServerManager {
private $SeleniumStartServer = false;
private $OS = '';
private $SeleniumServerPid = 'NaN';
private $SeleniumServerPort = 4444;
private $SeleniumServerStartTimeout = 10; // 10 secs.
private $SeleniumServerExecPath;
public function __construct( $startServer,
$serverPort,
$serverExecPath ) {
$this->OS = (string)PHP_OS;
if ( isset( $startServer ) ) {
$this->SeleniumStartServer = $startServer;
}
if ( isset( $serverPort ) ) {
$this->SeleniumServerPort = $serverPort;
}
if ( isset( $serverExecPath ) ) {
$this->SeleniumServerExecPath = $serverExecPath;
}
return;
}
// Getters for certain private attributes. No setters, since they
// should not change after the manager object is created.
public function getSeleniumStartServer() {
return $this->SeleniumStartServer;
}
public function getSeleniumServerPort() {
return $this->SeleniumServerPort;
}
public function getSeleniumServerPid() {
return $this->SeleniumServerPid;
}
// Changing value of SeleniumStartServer allows starting server after
// creation of the class instance. Only allow setting SeleniumStartServer
// to true, since after server is started, it is shut down by stop().
public function setSeleniumStartServer( $startServer ) {
if ( $startServer == true ) {
$this->SeleniumStartServer = true;
}
}
// return values are: 1) started - server started, 2) failed -
// server not started, 3) running - instructed to start server, but
// server already running
public function start() {
if ( !$this->SeleniumStartServer ) {
return 'failed';
}
// commented out cases are untested
switch ( $this->OS ) {
case "Linux":
# case' CYGWIN_NT-5.1':
case 'Darwin':
# case 'FreeBSD':
# case 'HP-UX':
# case 'IRIX64':
# case 'NetBSD':
# case 'OpenBSD':
# case 'SunOS':
# case 'Unix':
// *nix based OS
return $this->startServerOnUnix();
break;
case "Windows":
case "WIN32":
case "WINNT":
// Windows
return $this->startServerOnWindows();
break;
default:
// An untested OS
return 'failed';
break;
}
}
public function stop() {
// commented out cases are untested
switch ( $this->OS ) {
case "Linux":
# case' CYGWIN_NT-5.1':
case 'Darwin':
# case 'FreeBSD':
# case 'HP-UX':
# case 'IRIX64':
# case 'NetBSD':
# case 'OpenBSD':
# case 'SunOS':
# case 'Unix':
// *nix based OS
return $this->stopServerOnUnix();
break;
case "Windows":
case "WIN32":
case "WINNT":
// Windows
return $this->stopServerOnWindows();
break;
default:
// An untested OS
return 'failed';
break;
}
}
private function startServerOnUnix() {
$output = array();
$user = $_ENV['USER'];
// @todo FIXME: This should be a little more generalized :)
if ( PHP_OS == 'Darwin' ) {
// Mac OS X's ps barfs on the 'w' param, but doesn't need it.
$ps = "ps -U %s";
} else {
// Good on Linux
$ps = "ps -U %s w";
}
$psCommand = sprintf( $ps, escapeshellarg( $user ) );
exec( $psCommand . " | grep -i selenium-server", $output );
// Start server. If there is already a server running,
// return running.
if ( isset( $this->SeleniumServerExecPath ) ) {
$found = 0;
foreach ( $output as $string ) {
$found += preg_match(
'~^(.*)java(.+)-jar(.+)selenium-server~',
$string );
}
if ( $found == 0 ) {
// Didn't find the selenium server. Start it up.
// First set up comamand line suffix.
// NB: $! is pid of last job run in background
// The echo guarentees it is put into $op when
// the exec command is run.
$commandSuffix = ' > /dev/null 2>&1' . ' & echo $!';
$portText = ' -port ' . $this->SeleniumServerPort;
$command = "java -jar " .
escapeshellarg( $this->SeleniumServerExecPath ) .
$portText . $commandSuffix;
exec( $command, $op );
$pid = (int)$op[0];
if ( $pid != "" ) {
$this->SeleniumServerPid = $pid;
} else {
$this->SeleniumServerPid = 'NaN';
// Server start failed.
return 'failed';
}
// Wait for the server to startup and listen
// on its port. Note: this solution kinda
// stinks, since it uses a wait loop - dnessett
wfSuppressWarnings();
for ( $cnt = 1;
$cnt <= $this->SeleniumServerStartTimeout;
$cnt++ ) {
$fp = fsockopen( 'localhost',
$this->SeleniumServerPort,
$errno, $errstr, 0 );
if ( !$fp ) {
sleep( 1 );
continue;
// Server start succeeded.
} else {
fclose( $fp );
return 'started';
}
}
wfRestoreWarnings();
echo ( "Starting Selenium server timed out.\n" );
return 'failed';
} else {
// server already running.
return 'running';
}
}
// No Server execution path defined.
return 'failed';
}
private function startServerOnWindows() {
// Unimplemented.
return 'failed';
}
private function stopServerOnUnix() {
if ( !empty( $this->SeleniumServerPid ) &&
$this->SeleniumServerPid != 'NaN'
) {
exec( "kill -9 " . $this->SeleniumServerPid );
return 'stopped';
} else {
return 'failed';
}
}
private function stopServerOnWindows() {
// Unimplemented.
return 'failed';
}
}
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