001/*
002 * (C) Copyright 2006-2008 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Nuxeo - initial API and implementation
018 *
019 * $Id$
020 *
021 */
022
023package org.nuxeo.ecm.platform.commandline.executor.service.cmdtesters;
024
025import java.io.IOException;
026import java.io.InputStream;
027
028import org.nuxeo.ecm.platform.commandline.executor.service.CommandLineDescriptor;
029
030/**
031 * Default implementation of the {@link CommandTester} interface. Simple check for the target command. Checks execution
032 * on system with contributed test parameters.
033 *
034 * @author tiry
035 */
036public class DefaultCommandTester implements CommandTester {
037
038    @Override
039    public CommandTestResult test(CommandLineDescriptor cmdDescriptor) {
040        String cmd = cmdDescriptor.getCommand();
041        String params = cmdDescriptor.getTestParametersString();
042        String[] cmdWithParams = (cmd + " " + params).split(" ");
043        try {
044            ProcessBuilder builder = new ProcessBuilder(cmdWithParams);
045            // make sure we have only one InputStream to read to avoid parallelism/deadlock issues
046            builder.redirectErrorStream(true);
047            Process process = builder.start();
048            // close process input immediately
049            process.getOutputStream().close();
050            // consume all process output
051            try (InputStream in = process.getInputStream()) {
052                byte[] bytes = new byte[4096];
053                while (in.read(bytes) != -1) {
054                    // loop
055                }
056            }
057            // wait for process termination
058            process.waitFor();
059        } catch (InterruptedException e) {
060            Thread.currentThread().interrupt();
061            throw new RuntimeException(e);
062        } catch (IOException e) {
063            return new CommandTestResult(
064                    "command " + cmd + " not found in system path (descriptor " + cmdDescriptor + ")");
065        }
066
067        return new CommandTestResult();
068    }
069
070}