import org.openqa.selenium.net.UrlChecker; //导入依赖的package包/类
/**
 * Stop the configured Selenium Grid node server.
 * 
 * @param localOnly 'true' to target only local Grid node server
 * @return 'false' if [localOnly] and node is remote; otherwise 'true'
 */
public static boolean stopGridNode(boolean localOnly) {
    if (localOnly && !isLocalNode()) {
        return false;
    }
    
    RegistrationRequest nodeConfig = SeleniumConfig.getConfig().getNodeConfig();
    if (isNodeActive(nodeConfig)) {
        HttpHost nodeHost = GridUtility.getNodeHost(nodeConfig);
        try {
            GridUtility.getHttpResponse(nodeHost, NODE_SHUTDOWN);
            new UrlChecker().waitUntilUnavailable(SHUTDOWN_DELAY, TimeUnit.SECONDS, URI.create(nodeHost.toURI()).toURL());
        } catch (IOException | TimeoutException e) {
            throw UncheckedThrow.throwUnchecked(e);
        }
    }
    
    setNodeProcess(null);
    return true;
}
 

import org.openqa.selenium.net.UrlChecker; //导入依赖的package包/类
/**
 * Stop the configured Selenium Grid hub server.
 * 
 * @param localOnly 'true' to target only local Grid hub server
 * @return 'false' if [localOnly] and hub is remote; otherwise 'true'
 */
public static boolean stopGridHub(boolean localOnly) {
    if (localOnly && !isLocalHub()) {
        return false;
    }
    
    GridHubConfiguration hubConfig = SeleniumConfig.getConfig().getHubConfig();
    if (isHubActive(hubConfig)) {
        HttpHost hubHost = GridUtility.getHubHost(hubConfig);
        try {
            GridUtility.getHttpResponse(hubHost, HUB_SHUTDOWN);
            new UrlChecker().waitUntilUnavailable(SHUTDOWN_DELAY, TimeUnit.SECONDS, URI.create(hubHost.toURI()).toURL());
        } catch (IOException | TimeoutException e) {
            throw UncheckedThrow.throwUnchecked(e);
        }
    }
    
    setHubProcess(null);
    return true;
}
 

import org.openqa.selenium.net.UrlChecker; //导入依赖的package包/类
/**
 * Stop the configured Selenium Grid node server.
 * 
 * @param localOnly 'true' to target only local Grid node server
 * @return 'false' if [localOnly] and node is remote; otherwise 'true'
 */
public static boolean stopGridNode(boolean localOnly) {
    if (localOnly && !isLocalNode()) {
        return false;
    }
    
    GridNodeConfiguration nodeConfig = SeleniumConfig.getConfig().getNodeConfig();
    if (isNodeActive(nodeConfig)) {
        HttpHost nodeHost = GridUtility.getNodeHost(nodeConfig);
        try {
            GridUtility.getHttpResponse(nodeHost, NODE_SHUTDOWN);
            new UrlChecker().waitUntilUnavailable(SHUTDOWN_DELAY, TimeUnit.SECONDS, URI.create(nodeHost.toURI()).toURL());
        } catch (IOException | TimeoutException e) {
            throw UncheckedThrow.throwUnchecked(e);
        }
    }
    
    setNodeProcess(null);
    return true;
}
 

import org.openqa.selenium.net.UrlChecker; //导入依赖的package包/类
@Override public boolean isRunning() {
    lock.lock();
    try {
        if (process == null) {
            return false;
        }

        if (!process.isRunning()) {
            return false;
        }

        try {
            ping(1500, TimeUnit.MILLISECONDS);
            return true;
        } catch (UrlChecker.TimeoutException e) {
            return false;
        }
    } finally {
        lock.unlock();
    }

}
 

import org.openqa.selenium.net.UrlChecker; //导入依赖的package包/类
private void ping(long time, TimeUnit timeUnit) throws UrlChecker.TimeoutException {
    URL url = getUrl();
    try {
        URL status = new URL(url.toString() + "/status");
        new UrlChecker().waitUntilAvailable(time, timeUnit, status);
    } catch (MalformedURLException e) {
        throw new RuntimeException(
            "URL出错 " + url.toString().toString() + "/status");
    }
}
 

import org.openqa.selenium.net.UrlChecker; //导入依赖的package包/类
/**
 * Start the specified Selenium Grid server.
 * @param serverParms Selenium Grid server parameters
 * 
 * @throws TimeoutException If Grid server took too long to activate.
 */
private static void startGridServer(GridServerParms serverParms) throws TimeoutException {
    Process serverProcess = GridProcess.start(serverParms.processArgs);
    new UrlChecker().waitUntilAvailable(WaitType.HOST.getInterval(), TimeUnit.SECONDS, serverParms.statusUrl);
    setProcess(serverParms.processRole, serverProcess);
}