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Selenium/WebDriver bindings for Java applications
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/*******************************************************************************
 * Copyright 2016 Jalian Systems Pvt. Ltd.
 * 
 * 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.sourceforge.marathon.javadriver;

import static org.openqa.selenium.remote.DriverCommand.QUIT;

import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.logging.Logger;

import org.openqa.selenium.WebDriverException;
import org.openqa.selenium.os.CommandLine;
import org.openqa.selenium.remote.Command;
import org.openqa.selenium.remote.HttpCommandExecutor;
import org.openqa.selenium.remote.Response;

import net.sourceforge.marathon.javaagent.Wait;

public class JavaDriverCommandExecutor extends HttpCommandExecutor {

    public static final Logger LOGGER = Logger.getLogger(JavaDriverCommandExecutor.class.getName());

    private static final String MARATHON_APPLICATION_DONT_MONITOR = "marathon.application.dont.monitor";
    private EmbeddedServer server;
    private JavaProfile profile;

    private boolean started;

    public JavaDriverCommandExecutor(JavaProfile profile) {
        super(getURL(profile));
        this.profile = profile;
        this.started = false;
    }

    private static URL getURL(JavaProfile profile) {
        try {
            return new URL("http", "localhost", profile.getPort(), "/");
        } catch (MalformedURLException e) {
            throw new WebDriverException("Unable to create URL for the server", e);
        }
    }

    public void start() {
        if (profile.isEmbedded()) {
            if (server != null) {
                return;
            }
            int port = getAddressOfRemoteServer().getPort();
            server = new EmbeddedServer(profile);
            try {
                server.start(port);
            } catch (IOException e) {
                throw new WebDriverException("Unable to start the server on port " + port, e);
            }
        } else {
            final CommandLine command = profile.getCommandLine();
            LOGGER.info("Executing: " + command);
            command.copyOutputTo(profile.getOutputStream());
            command.executeAsync();
            try {
                new Wait() {
                    @Override
                    public boolean until() {
                        if (isConnected())
                            return true;
                        if (!command.isRunning()) {
                            if (profile.isJavaWebStart() || profile.isCommandLine()
                                    || Boolean.getBoolean(MARATHON_APPLICATION_DONT_MONITOR))
                                return false;
                            return true;
                        }
                        return false;
                    }
                }.wait("Unable to estabilsh connection with the application",
                        Long.getLong("marathon.application.wait", Wait.DEFAULT_TIMEOUT * 5));
            } catch (Exception e) {
                LOGGER.warning("Unable to estabilsh connection with the application(timeout): " + command);
                if (command.isRunning())
                    command.destroy();
                throw e;
            }
            if (!isConnected()) {
                if (command.isRunning()) {
                    command.destroy();
                    LOGGER.warning("Unable to estabilsh connection with the application: " + command);
                    throw new WebDriverException("Unable to estabilsh connection with the application");
                } else {
                    LOGGER.warning("The application exited before establishing the connection: " + command);
                    throw new WebDriverException("The application exited before establishing the connection");
                }
            }
        }
    }

    public boolean isConnected() {
        try {
            getAddressOfRemoteServer().openConnection().connect();
            return true;
        } catch (IOException e) {
            // Cannot connect yet.
            return false;
        }
    }

    public void stop() {
        if (server != null) {
            server.stop();
        }
        server = null;
    }

    @Override
    public Response execute(Command command) throws IOException {
        if (!this.started) {
            start();
            this.started = true;
        }
        if (QUIT.equals(command.getName())) {
            stop();
        }
        return super.execute(command);
    }
}