net.codestory.simplelenium.driver.ThreadSafeDriver.java Source code

Introduction

Here is the source code for net.codestory.simplelenium.driver.ThreadSafeDriver.java

Source

/**
 * Copyright (C) 2013-2015 all@code-story.net
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License
 */
package net.codestory.simplelenium.driver;

import org.openqa.selenium.remote.RemoteWebDriver;
import org.openqa.selenium.remote.UnreachableBrowserException;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Proxy;
import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.Set;

class ThreadSafeDriver {
    private ThreadSafeDriver() {
        // Static class
    }

    static SeleniumDriver makeThreadSafe(RemoteWebDriver driver) {
        Runtime.getRuntime().addShutdownHook(new Thread(() -> {
            try {
                driver.quit();
            } catch (UnreachableBrowserException e) {
                // Ignore. The browser was killed properly
            }
        }));

        return (SeleniumDriver) Proxy.newProxyInstance(Thread.currentThread().getContextClassLoader(),
                findInterfaces(driver), (proxy, method, args) -> {
                    if (method.getName().equals("quit")) {
                        return null; // We don't want anybody to quit() our (per thread) driver
                    }

                    try {
                        return method.invoke(driver, args);
                    } catch (InvocationTargetException e) {
                        throw e.getCause();
                    }
                });
    }

    private static Class[] findInterfaces(Object driver) {
        Set<Class<?>> interfaces = new LinkedHashSet<>();

        interfaces.add(SeleniumDriver.class);

        for (Class<?> parent = driver.getClass(); parent != null;) {
            Collections.addAll(interfaces, parent.getInterfaces());
            parent = parent.getSuperclass();
        }

        return interfaces.toArray(new Class[interfaces.size()]);
    }
}