Service Management

/**
 * Manages the life and death of a ChromeDriver server.
 * Extends DriverService to provide Chrome-specific server management.
 */
public class ChromeDriverService extends DriverService {
    
    /**
     * System property that defines the location of the chromedriver executable.
     */
    public static final String CHROME_DRIVER_EXE_PROPERTY = "webdriver.chrome.driver";
    
    /**
     * System property that defines the location of the log file.
     */
    public static final String CHROME_DRIVER_LOG_PROPERTY = "webdriver.chrome.logfile";
    
    /**
     * Boolean system property that defines whether chromedriver should start with verbose logging.
     */
    public static final String CHROME_DRIVER_VERBOSE_LOG_PROPERTY = "webdriver.chrome.verboseLogging";
    
    /**
     * Boolean system property that defines whether chromedriver should start in silent mode.
     */
    public static final String CHROME_DRIVER_SILENT_OUTPUT_PROPERTY = "webdriver.chrome.silentOutput";
    
    /**
     * System property that defines comma-separated list of remote IPv4 addresses
     * which are allowed to connect to ChromeDriver.
     */
    public static final String CHROME_DRIVER_WHITELISTED_IPS_PROPERTY = "webdriver.chrome.whitelistedIps";
    
    /**
     * Creates a ChromeDriverService with specified configuration.
     * @param executable The chromedriver executable file
     * @param port Which port to start the ChromeDriver on
     * @param args The arguments to the launched server
     * @param environment The environment for the launched server
     * @throws IOException If an I/O error occurs
     */
    public ChromeDriverService(
        File executable,
        int port,
        ImmutableList<String> args,
        ImmutableMap<String, String> environment) throws IOException;
}

/**
 * Configures and returns a new ChromeDriverService using the default configuration.
 * Uses the chromedriver executable identified by the CHROME_DRIVER_EXE_PROPERTY system property.
 * Each service created by this method will be configured to use a free port on the current system.
 * @return A new ChromeDriverService using the default configuration
 */
public static ChromeDriverService createDefaultService();

import org.openqa.selenium.chrome.ChromeDriverService;

// Set system property for chromedriver location
System.setProperty("webdriver.chrome.driver", "/path/to/chromedriver");

// Create default service - will find free port automatically
ChromeDriverService service = ChromeDriverService.createDefaultService();

// Start the service
service.start();

// Use with RemoteWebDriver for better resource management
WebDriver driver = new RemoteWebDriver(service.getUrl(), new ChromeOptions());

// Clean up
driver.quit();
service.stop();

/**
 * Builder used to configure new ChromeDriverService instances.
 * Provides fluent API for service configuration.
 */
public static class Builder extends DriverService.Builder<ChromeDriverService, ChromeDriverService.Builder> {
    
    /**
     * Scores the given capabilities to determine if this service supports them.
     * Higher scores indicate better support.
     * @param capabilities The capabilities to score
     * @return Score indicating support level (0 = no support, higher = better support)
     */
    public int score(Capabilities capabilities);
    
    /**
     * Sets which driver executable the builder will use.
     * @param file The chromedriver executable to use
     * @return A self reference for method chaining
     */
    public Builder usingDriverExecutable(File file);
    
    /**
     * Sets which port the driver server should be started on.
     * @param port The port to use; must be non-negative
     * @return A self reference for method chaining
     */
    public Builder usingPort(int port);
    
    /**
     * Configures the driver server to start on any available port.
     * @return A self reference for method chaining
     */
    public Builder usingAnyFreePort();
    
    /**
     * Configures the driver server to write log to the given file.
     * @param logFile The file to write logs to
     * @return A self reference for method chaining
     */
    public Builder withLogFile(File logFile);
    
    /**
     * Defines the environment variables for the launched driver server.
     * @param environment A map of environment variables to launch the server with
     * @return A self reference for method chaining
     */
    public Builder withEnvironment(Map<String, String> environment);
    
    /**
     * Configures the driver server verbosity.
     * @param verbose True for verbose output, false otherwise
     * @return A self reference for method chaining
     */
    public Builder withVerbose(boolean verbose);
    
    /**
     * Configures the driver server for silent output.
     * @param silent True for silent output, false otherwise  
     * @return A self reference for method chaining
     */
    public Builder withSilent(boolean silent);
    
    /**
     * Configures the comma-separated list of remote IPv4 addresses which are allowed
     * to connect to the driver server.
     * @param whitelistedIps Comma-separated list of remote IPv4 addresses
     * @return A self reference for method chaining
     */
    public Builder withWhitelistedIps(String whitelistedIps);
}

import org.openqa.selenium.chrome.ChromeDriverService;
import java.io.File;

// Basic builder usage
ChromeDriverService service = new ChromeDriverService.Builder()
    .usingDriverExecutable(new File("/path/to/chromedriver"))
    .usingAnyFreePort()
    .build();

// Advanced configuration
ChromeDriverService service = new ChromeDriverService.Builder()
    .usingDriverExecutable(new File("/usr/local/bin/chromedriver"))
    .usingPort(4444)  
    .withVerbose(true)
    .withLogFile(new File("/tmp/chromedriver.log"))
    .withWhitelistedIps("127.0.0.1,192.168.1.100")
    .build();

// For CI/CD environments
ChromeDriverService service = new ChromeDriverService.Builder()
    .usingAnyFreePort()
    .withSilent(true)
    .withLogFile(new File("./logs/chromedriver.log"))
    .build();

service.start();

// Set chromedriver executable location
System.setProperty("webdriver.chrome.driver", "/path/to/chromedriver");

// Set log file location
System.setProperty("webdriver.chrome.logfile", "/path/to/chromedriver.log");

// Enable verbose logging
System.setProperty("webdriver.chrome.verboseLogging", "true");

// Enable silent mode (minimal output)
System.setProperty("webdriver.chrome.silentOutput", "true");

// Set whitelisted IPs for remote connections
System.setProperty("webdriver.chrome.whitelistedIps", "127.0.0.1,192.168.1.0/24");

ChromeDriverService service = new ChromeDriverService.Builder()
    .withVerbose(true)          // Enable verbose logging
    .withSilent(false)          // Disable silent mode  
    .withLogFile(new File("/tmp/chromedriver.log"))  // Set log file
    .build();

// Allow specific IPs to connect
ChromeDriverService service = new ChromeDriverService.Builder()
    .withWhitelistedIps("127.0.0.1,192.168.1.100,10.0.0.0/8")
    .usingPort(4444)
    .build();

// Start service
service.start();
System.out.println("ChromeDriver server URL: " + service.getUrl());

// Service will only accept connections from whitelisted IPs

import org.openqa.selenium.chrome.ChromeDriverService;
import org.openqa.selenium.chrome.ChromeOptions;
import org.openqa.selenium.remote.RemoteWebDriver;
import org.openqa.selenium.WebDriver;
import java.io.File;
import java.io.IOException;

public class ChromeServiceExample {
    private ChromeDriverService service;
    
    public void setupService() throws IOException {
        // Create and configure service
        service = new ChromeDriverService.Builder()
            .usingDriverExecutable(new File("/usr/local/bin/chromedriver"))
            .usingAnyFreePort()
            .withVerbose(true)
            .withLogFile(new File("./chromedriver.log"))
            .build();
            
        // Start the service
        service.start();
        System.out.println("ChromeDriver started on: " + service.getUrl());
    }
    
    public WebDriver createDriver() {
        // Create driver connected to running service
        ChromeOptions options = new ChromeOptions();
        options.setHeadless(true);
        
        return new RemoteWebDriver(service.getUrl(), options);
    }
    
    public void teardownService() {
        // Stop the service and clean up resources
        if (service != null && service.isRunning()) {
            service.stop();
            System.out.println("ChromeDriver service stopped");
        }
    }
}

// Usage in test framework
ChromeServiceExample example = new ChromeServiceExample();
example.setupService();

WebDriver driver = example.createDriver();
driver.get("https://example.com");
System.out.println("Page title: " + driver.getTitle());

driver.quit();
example.teardownService();

// Start ChromeDriver service for Grid registration
ChromeDriverService service = new ChromeDriverService.Builder()
    .usingDriverExecutable(new File("/opt/chromedriver"))
    .usingPort(5555)
    .withWhitelistedIps("0.0.0.0/0")  // Allow all IPs for Grid
    .withVerbose(false)
    .build();

service.start();

// Service can now be registered with Selenium Grid hub
// Grid will route Chrome test requests to this service

public class EnvironmentAwareService {
    public static ChromeDriverService createFromEnvironment() {
        ChromeDriverService.Builder builder = new ChromeDriverService.Builder();
        
        // Use environment variables if available
        String driverPath = System.getenv("CHROME_DRIVER_PATH");
        if (driverPath != null) {
            builder.usingDriverExecutable(new File(driverPath));
        }
        
        String port = System.getenv("CHROME_DRIVER_PORT");
        if (port != null) {
            builder.usingPort(Integer.parseInt(port));
        } else {
            builder.usingAnyFreePort();
        }
        
        // Configure based on environment
        String verbose = System.getenv("CHROME_DRIVER_VERBOSE");
        if ("true".equals(verbose)) {
            builder.withVerbose(true);
        }
        
        String whitelistedIps = System.getenv("CHROME_DRIVER_WHITELIST");
        if (whitelistedIps != null) {
            builder.withWhitelistedIps(whitelistedIps);
        }
        
        return builder.build();
    }
}

// Guava collections used in service configuration
class ImmutableList<T> {
    public static <T> ImmutableList<T> of(T... elements);
    public static <T> Builder<T> builder();
}

class ImmutableMap<K, V> {
    public static <K, V> ImmutableMap<K, V> of();
    public static <K, V> Builder<K, V> builder();
}

// Base service class
abstract class DriverService {
    public abstract void start() throws IOException;
    public abstract void stop();
    public abstract boolean isRunning();
    public abstract URL getUrl();
    
    public static abstract class Builder<DS extends DriverService, B extends Builder<?, ?>> {
        public B usingDriverExecutable(File file);
        public B usingAnyFreePort();
        public B usingPort(int port);
        public B withLogFile(File logFile);
        public B withEnvironment(Map<String, String> environment);
        public abstract DS build();
    }
}