how to run a selenium-server-standalone?

Question

I'm trying to run selenium server, and get errors:

rond-macpro:selenium eladb$  java -Dwebdriver.chrome.driver=./chromedriver -r selenium-server-standalone-2.44.0.jar Unrecognized option: -r Error: Could not create the Java Virtual Machine. Error: A fatal exception has occurred. Program will exit. 

and without -r (what is it anyway?)

rond-macpro:selenium eladb$  java -Dwebdriver.chrome.driver=./chromedriver  selenium-server-standalone-2.44.0.jar Error: Could not find or load main class selenium-server-standalone-2.44.0.jar 

how should I start the server?

how do I set a non-default port to listen to?

These two posts: 1 2 - contradicts regarding the syntax. I think.

Answer 1

java -jar seleniumjar.jar -Dwebdriver.chrome.driver=./chromedriver  

If you want to specifiy the port do

java -jar seleniumjar.version.jar -Dwebdriver.chrome.driver=./chromedriver -port 4545 

As of 3.8.1, specifying the driver is no longer necessary:

java -jar seleniumjar.jar 

Answer 2

Running Standalone Selenium Server:

Form Jar Source Main-Class is org.openqa.grid.selenium.GridLauncher

As per GridRole class - Selenium server can run in one of the following roles:

1. NOT_GRID [If -role option is omitted the server runs standalone not being a part of a grid]>
2. HUB [as a hub of a Selenium grid]
3. NODE [as a node of a Selenium grid]

D:\> java -jar selenium-server-standalone-*.jar -host 127.0.0.1 -port 4444 

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NOT GRID

• RC(Selenium interface)- IP:Port/selenium-server:

Selenium Remote Control (RC) requires server to be started before executing the test scripts. RC server injects Selenium core (JavaScript) into the browser. The core (daemon process) receives commands from the server by your test scripts and executes them in a browser then results to your program. But cannot handle moving mouse cursors & mobile execution.

Java Client Driver: Client-Configures your browser to use the Selenium Server as an HTTP proxy and passes browser commands to server through "/selenium-server/RemoteRunner.html?sessionId=1234", clients may send Driver Command requests to selenium server over HTTP as follows:

Code & Requests: RC Server continuously runs. we create a daemon and from that communicate with the browser.

Selenium daemon = new DefaultSelenium("172.16.20.156", 4464, "*firefox", "https://www.google.co.in/"); daemon.start(); -- daemon.stop(); (OR) setUp("http://www.google.com/", "*firefox", 4454); selenium.windowMaximize();  GET:http://localhost:4454/selenium-server/driver/?cmd=open&1=https://www.google.co.in/&sessionId=9b1a232d9478497892e09cfc93cf665a 

• RC(WebDriverinterface)- IP:Port/wd/hub/static/resource/hub.html:

RWD Code & Requests:

WebDriver nativeDriver = new RemoteWebDriver(new URL("http://127.0.0.1:4454/wd/hub"), DesiredCapabilities.firefox());  Requests: http://127.0.0.1:4454/wd/hub/session     /123...[SESSIONID]         /url         { "url" : "http://demo.opencart.com/index.php?route=account/login" }           /execute         { "script" : "document.querySelectorAll( arguments[0] )[0].click();", "args" : ['input.btn'] } 

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Grid: [ - IP:Port/grid/console]

HUB Grid HUB Running as a standalone server: Hub is a central point which distributing tests on several node-machines, which are registered to it for parallel execution.

java -jar selenium-server-standalone-2.53.0.jar -host 127.0.0.1 -port 4454 -role hub -log "D:\\HUB_Log.txt" 

NODE [RC] has to post a request to HUB in order to register with it, by this URL - IP:Port//grid/register.

java -jar selenium-server-standalone-2.53.0.jar -host 127.0.0.1 -port 4458 -role node  -hub http://127.0.0.1:4454/grid/register -hubHost 127.0.0.1 -hubPort 4454  -browser browserName=firefox,version=24.0, maxinstance=1,platform=WINDOWS7  -browser  browserName=chrome,version=53.0,platform=WINDOWS  -Dwebdriver.chrome.driver=D:\\Drivers\\chromedrivers\\2.24\\chromedriver.exe 

Running as a grid node: browser Instance INFO: browserName=chrome, version=53.0, maxinstance=1, platform=WINDOWS Command Line parameters with System Property values -Dproperty=value -Dchrome=driverAddress (If value is a string that contains spaces, you must enclose the string in double quotes)

Node registration with a JSON configuration file registerNode.json.

D:\SeleniumJar_Source>java -jar selenium-server-standalone-2.53.0.jar -role node  -hub http://127.0.0.1:4454/grid/register  -nodeConfig registerNode.json  -Dwebdriver.chrome.driver="D:\\Drivers\\chromedrivers\\2.24\\chromedriver.exe"  -Dwebdriver.ie.driver="D:\\Drivers\\IEDrivers\\iedriver64\\IEDriverServer.exe"  -Dwebdriver.firefox.logfile="D:\\FirefoxInstance.txt"  -Dwebdriver.chrome.logfile="D:\\ChromeInstance.txt"  -Dwebdriver.ie.logfile="D:\\IEInstance.txt" 

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WebDriver doesn't require any server start before start execution. You can see that WebDriver acts just as a normal Java library does: it's entirely self-contained, and you don't need to remember to start any additional processes or run any installers before using it.

WebDriver driver = new FirefoxDriver(); 

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@see

• Selenium using Java: Start Hub Server and register Nodes with Hub
• GitHub Wiki