Example usage for java.net URLClassLoader loadClass

Introduction

In this page you can find the example usage for java.net URLClassLoader loadClass.

Prototype

public Class<?> loadClass(String name) throws ClassNotFoundException 

Source Link

Document

Loads the class with the specified binary name.

Usage

From source file:org.pentaho.hadoop.mapreduce.test.TestSubmitMapReduceJob.java

@Test
public void submitJob() throws Exception {

    String[] args = { "hdfs://" + hostname + ":" + hdfsPort + "/junit/wordcount/input",
            "hdfs://" + hostname + ":" + hdfsPort + "/junit/wordcount/output" };

    JobConf conf = new JobConf();
    conf.setJobName("wordcount");

    conf.setOutputKeyClass(Text.class);
    conf.setOutputValueClass(IntWritable.class);

    File jar = new File("./test-res/pentaho-mapreduce-sample.jar");

    URLClassLoader loader = new URLClassLoader(new URL[] { jar.toURI().toURL() });

    conf.setMapperClass(/*w  w w  . j a  va2 s . c o m*/
            (Class<? extends Mapper>) loader.loadClass("org.pentaho.hadoop.mapreduce.sample.MRWordCount$Map"));
    conf.setCombinerClass((Class<? extends Reducer>) loader
            .loadClass("org.pentaho.hadoop.mapreduce.sample.MRWordCount$Reduce"));
    conf.setReducerClass((Class<? extends Reducer>) loader
            .loadClass("org.pentaho.hadoop.mapreduce.sample.MRWordCount$Reduce"));

    conf.setInputFormat(TextInputFormat.class);
    conf.setOutputFormat(TextOutputFormat.class);

    FileInputFormat.setInputPaths(conf, new Path(args[0]));
    FileOutputFormat.setOutputPath(conf, new Path(args[1]));

    conf.set("fs.default.name", "hdfs://" + hostname + ":" + hdfsPort);
    conf.set("mapred.job.tracker", hostname + ":" + trackerPort);

    conf.setJarByClass(loader.loadClass("org.pentaho.hadoop.mapreduce.sample.MRWordCount"));
    conf.setWorkingDirectory(new Path("/tmp/wordcount"));

    JobClient jobClient = new JobClient(conf);
    ClusterStatus status = jobClient.getClusterStatus();
    assertEquals(State.RUNNING, status.getJobTrackerState());

    RunningJob runningJob = jobClient.submitJob(conf);
    System.out.print("Running " + runningJob.getJobName() + "");
    while (!runningJob.isComplete()) {
        System.out.print(".");
        Thread.sleep(500);
    }
    System.out.println();
    System.out.println("Finished " + runningJob.getJobName() + ".");

    FileObject file = fsManager.resolveFile(buildHDFSURL("/junit/wordcount/output/part-00000"));
    String output = IOUtils.toString(file.getContent().getInputStream());
    assertEquals("Bye\t1\nGoodbye\t1\nHadoop\t2\nHello\t2\nWorld\t2\n", output);
}

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From source file:com.haulmont.cuba.web.sys.singleapp.SingleAppWebServletListener.java

@Override
public void contextInitialized(ServletContextEvent sce) {
    try {/*from  w  w w  .  ja  v  a  2s.  c o m*/
        ClassLoader contextClassLoader = Thread.currentThread().getContextClassLoader();
        //need to put the following class to WebAppClassLoader, to share it between for web and core
        contextClassLoader.loadClass("com.haulmont.cuba.core.sys.remoting.LocalServiceDirectory");

        ServletContext servletContext = sce.getServletContext();
        String dependenciesFile;
        try {
            dependenciesFile = IOUtils.toString(servletContext.getResourceAsStream("/WEB-INF/web.dependencies"),
                    "UTF-8");
        } catch (IOException e) {
            throw new RuntimeException("An error occurred while loading dependencies file", e);
        }

        String[] dependenciesNames = dependenciesFile.split("\\n");
        URL[] urls = Arrays.stream(dependenciesNames).map((String name) -> {
            try {
                return servletContext.getResource("/WEB-INF/lib/" + name);
            } catch (MalformedURLException e) {
                throw new RuntimeException("An error occurred while loading dependency " + name, e);
            }
        }).toArray(URL[]::new);
        URLClassLoader webClassLoader = new CubaSingleAppClassLoader(urls, contextClassLoader);

        Thread.currentThread().setContextClassLoader(webClassLoader);
        Class<?> appContextLoaderClass = webClassLoader.loadClass(getAppContextLoaderClassName());
        appContextLoader = appContextLoaderClass.newInstance();

        Method setJarsNamesMethod = ReflectionUtils.findMethod(appContextLoaderClass, "setJarNames",
                String.class);
        ReflectionUtils.invokeMethod(setJarsNamesMethod, appContextLoader, dependenciesFile);

        Method contextInitializedMethod = ReflectionUtils.findMethod(appContextLoaderClass,
                "contextInitialized", ServletContextEvent.class);
        ReflectionUtils.invokeMethod(contextInitializedMethod, appContextLoader, sce);

        Thread.currentThread().setContextClassLoader(contextClassLoader);
    } catch (ClassNotFoundException | InstantiationException | IllegalAccessException e) {
        throw new RuntimeException("An error occurred while starting single WAR application", e);
    }
}

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From source file:me.jaimegarza.syntax.test.java.TestJavaPackedParser.java

@Test
public void test03Runtime() throws ParsingException, AnalysisException, OutputException, MalformedURLException,
        ClassNotFoundException, InstantiationException, IllegalAccessException, SecurityException,
        NoSuchMethodException, IllegalArgumentException, InvocationTargetException {
    generateLanguageFile(packedArgs);//from   w w w  .  j  a  va2 s .c  om

    File source = new File(tmpLanguageFile);
    File sourceDir = source.getParentFile();
    CompilationResult result = compileJavaFile(source, sourceDir);
    Assert.assertEquals(result.getErrors().length, 0, "Syntax errors found trying to execute");

    URL urls[] = new URL[1];
    urls[0] = sourceDir.toURI().toURL();
    URLClassLoader classLoader = URLClassLoader.newInstance(urls, this.getClass().getClassLoader());
    String className = FilenameUtils.getBaseName(tmpLanguageFile);
    Class<?> clazz = classLoader.loadClass(className);
    Object parser = clazz.newInstance();
    Method setVerbose = parser.getClass().getMethod("setVerbose", boolean.class);
    Method parse = parser.getClass().getMethod("parse");
    Method getTotal = parser.getClass().getMethod("getTotal");
    setVerbose.invoke(parser, true);
    parse.invoke(parser);
    Object o = getTotal.invoke(parser);
    Assert.assertTrue(o instanceof Integer);
    Integer i = (Integer) o;
    Assert.assertEquals((int) i, -17, "total does not match");
}

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From source file:me.jaimegarza.syntax.test.java.TestJavaExpandedParser.java

@Test
public void test03Runtime() throws ParsingException, AnalysisException, OutputException, MalformedURLException,
        ClassNotFoundException, InstantiationException, IllegalAccessException, SecurityException,
        NoSuchMethodException, IllegalArgumentException, InvocationTargetException {
    generateLanguageFile(expandedArgs);/*from ww  w  .  jav a  2 s .co  m*/

    File source = new File(tmpLanguageFile);
    File sourceDir = source.getParentFile();
    CompilationResult result = compileJavaFile(source, sourceDir);
    Assert.assertEquals(result.getErrors().length, 0, "Syntax errors found trying to execute");

    URL urls[] = new URL[1];
    urls[0] = sourceDir.toURI().toURL();
    URLClassLoader classLoader = URLClassLoader.newInstance(urls, this.getClass().getClassLoader());
    String className = FilenameUtils.getBaseName(tmpLanguageFile);
    Class<?> clazz = classLoader.loadClass(className);
    Object parser = clazz.newInstance();
    Method setVerbose = parser.getClass().getMethod("setVerbose", boolean.class);
    Method parse = parser.getClass().getMethod("parse");
    Method getTotal = parser.getClass().getMethod("getTotal");
    setVerbose.invoke(parser, true);
    parse.invoke(parser);
    Object o = getTotal.invoke(parser);
    Assert.assertTrue(o instanceof Integer);
    Integer i = (Integer) o;
    Assert.assertEquals((int) i, -17, "total does not match");
}

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From source file:com.haulmont.cuba.core.sys.singleapp.SingleAppCoreServletListener.java

@Override
public void contextInitialized(ServletContextEvent sce) {
    try {/*from   w ww . j a  v  a2 s  .  c o  m*/
        ClassLoader contextClassLoader = Thread.currentThread().getContextClassLoader();
        //need to put the following class to WebAppClassLoader, to share it between for web and core
        contextClassLoader.loadClass("com.haulmont.cuba.core.sys.remoting.LocalServiceDirectory");

        ServletContext servletContext = sce.getServletContext();
        String dependenciesFile;
        try {
            dependenciesFile = IOUtils
                    .toString(servletContext.getResourceAsStream("/WEB-INF/core.dependencies"), "UTF-8");
        } catch (IOException e) {
            throw new RuntimeException("An error occurred while loading dependencies file", e);
        }

        String[] dependenciesNames = dependenciesFile.split("\\n");
        URL[] urls = Arrays.stream(dependenciesNames).map((String name) -> {
            try {
                return servletContext.getResource("/WEB-INF/lib/" + name);
            } catch (MalformedURLException e) {
                throw new RuntimeException("An error occurred while loading dependency " + name, e);
            }
        }).toArray(URL[]::new);
        URLClassLoader coreClassLoader = new CubaSingleAppClassLoader(urls, contextClassLoader);

        Thread.currentThread().setContextClassLoader(coreClassLoader);
        Class<?> appContextLoaderClass = coreClassLoader.loadClass(getAppContextLoaderClassName());
        appContextLoader = appContextLoaderClass.newInstance();

        Method setJarsNamesMethod = ReflectionUtils.findMethod(appContextLoaderClass, "setJarNames",
                String.class);
        ReflectionUtils.invokeMethod(setJarsNamesMethod, appContextLoader, dependenciesFile);

        Method contextInitializedMethod = ReflectionUtils.findMethod(appContextLoaderClass,
                "contextInitialized", ServletContextEvent.class);
        ReflectionUtils.invokeMethod(contextInitializedMethod, appContextLoader, sce);

        Thread.currentThread().setContextClassLoader(contextClassLoader);
    } catch (ClassNotFoundException | InstantiationException | IllegalAccessException e) {
        throw new RuntimeException("An error occurred while starting single WAR application", e);
    }
}

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From source file:org.sonar.core.plugins.PluginFileExtractor.java

private void completeDeprecatedMetadata(DefaultPluginMetadata metadata) throws IOException {
    String mainClass = metadata.getMainClass();
    File pluginFile = metadata.getFile();
    try {/*from  ww  w. j  av a 2s  .co m*/
        // copy file in a temp directory because Windows+Oracle JVM Classloader lock the JAR file
        File tempFile = File.createTempFile(pluginFile.getName(), null);
        FileUtils.copyFile(pluginFile, tempFile);

        URLClassLoader pluginClassLoader = URLClassLoader.newInstance(new URL[] { tempFile.toURI().toURL() },
                getClass().getClassLoader());
        Plugin pluginInstance = (Plugin) pluginClassLoader.loadClass(mainClass).newInstance();
        metadata.setKey(PluginKeyUtils.sanitize(pluginInstance.getKey()));
        metadata.setDescription(pluginInstance.getDescription());
        metadata.setName(pluginInstance.getName());

    } catch (Exception e) {
        throw new RuntimeException("The metadata main class can not be created. Plugin file="
                + pluginFile.getName() + ", class=" + mainClass, e);
    }
}

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From source file:org.sonatype.mercury.gav.MercuryGavCli.java

@SuppressWarnings("unchecked")
@Override/*w w w.j  av a2  s . c om*/
public void invokePlexusComponent(CommandLine cli, PlexusContainer plexus) throws Exception {
    try {
        _mc = plexus.lookup(MercuryConfigurator.class);

        _monitor = _mc.getMonitor(cli);

        if (cli.hasOption(HELP)) {
            displayHelp();

            return;
        }

        _repos = _mc.getRepositories(cli);

        if (Util.isEmpty(_mainArgs) || _mainArgs.size() < 2) {
            displayHelp();

            return;
        }

        _executableGAV = _mainArgs.get(0);

        _executableClass = _mainArgs.get(1);

        ArtifactQueryList list = new ArtifactQueryList(new ArtifactMetadata(_executableGAV));

        _mercury = plexus.lookup(PlexusMercury.class);

        List<ArtifactMetadata> deps = _mercury.resolve(_repos, ArtifactScopeEnum.runtime, list, null, null);

        if (deps == null)
            throw new Exception(LANG.getMessage("cli.no.dependencies", _executableGAV));

        for (ArtifactMetadata md : deps)
            _monitor.message(md.toString());

        _monitor.message("reading ..");

        List<Artifact> al = _mercury.read(_repos, deps);

        if (al == null)
            throw new Exception(LANG.getMessage("cli.no.artifacts", _executableGAV));

        if (deps.size() != al.size())
            throw new Exception(
                    LANG.getMessage("cli.len.artifacts", _executableGAV, "" + deps.size(), "" + al.size()));

        URL[] artifacts = new URL[al.size()];

        int count = 0;

        for (Artifact a : al)
            artifacts[count++] = a.getFile().toURL();

        URLClassLoader cl = new URLClassLoader(artifacts);

        Class mainClass = cl.loadClass(_executableClass);

        Method[] methods = mainClass.getDeclaredMethods();

        Method mainMethod = null;

        for (Method m : methods)
            if ("main".equals(m.getName())) {
                mainMethod = m;

                break;
            }

        if (mainMethod == null)
            throw new Exception(LANG.getMessage("cli.no.main", _executableClass));

        String[] args = null;

        if (_mainArgs.size() > 2) {
            args = new String[_mainArgs.size() - 2];

            for (int i = 2; i < _mainArgs.size(); i++)
                args[i - 2] = _mainArgs.get(i);
        }

        @SuppressWarnings("unused")
        Class[] params = mainMethod.getParameterTypes();

        mainMethod.invoke(null, (Object) args);

    } catch (Exception e) {
        Util.say(LANG.getMessage("cli.error", e.getClass().getName(), e.getMessage()), _monitor);
        //            e.printStackTrace();
    }

    _monitor.message(LANG.getMessage("cli.done"));
}

---

From source file:com.ut.healthelink.service.CCDtoTxt.java

public String TranslateCCDtoTxt(String fileLocation, String ccdFileName, int orgId) throws Exception {

    Organization orgDetails = organizationmanager.getOrganizationById(orgId);
    fileSystem dir = new fileSystem();

    dir.setDir(orgDetails.getcleanURL(), "templates");

    String templatefileName = orgDetails.getparsingTemplate();

    URLClassLoader loader = new URLClassLoader(
            new URL[] { new URL("file://" + dir.getDir() + templatefileName) });

    // Remove the .class extension
    Class cls = loader.loadClass(templatefileName.substring(0, templatefileName.lastIndexOf('.')));
    Constructor constructor = cls.getConstructor();

    Object CCDObj = constructor.newInstance();

    Method myMethod = cls.getMethod("CCDtoTxt", new Class[] { File.class });

    /* Get the uploaded CCD File */
    fileLocation = fileLocation.replace("/Applications/bowlink/", "").replace("/home/bowlink/", "")
            .replace("/bowlink/", "");
    dir.setDirByName(fileLocation);/*from   w ww  .  jav a  2 s .co  m*/

    File ccdFile = new File(dir.getDir() + ccdFileName + ".xml");

    /* Create the txt file that will hold the CCD fields */
    String newfileName = new StringBuilder()
            .append(ccdFile.getName().substring(0, ccdFile.getName().lastIndexOf("."))).append(".")
            .append("txt").toString();

    File newFile = new File(dir.getDir() + newfileName);

    if (newFile.exists()) {
        try {

            if (newFile.exists()) {
                int i = 1;
                while (newFile.exists()) {
                    int iDot = newfileName.lastIndexOf(".");
                    newFile = new File(dir.getDir() + newfileName.substring(0, iDot) + "_(" + ++i + ")"
                            + newfileName.substring(iDot));
                }
                newfileName = newFile.getName();
                newFile.createNewFile();
            } else {
                newFile.createNewFile();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

    } else {
        newFile.createNewFile();
        newfileName = newFile.getName();

    }

    FileWriter fw = new FileWriter(newFile, true);

    /* END */
    String fileRecords = (String) myMethod.invoke(CCDObj, new Object[] { ccdFile });

    fw.write(fileRecords);

    fw.close();

    return newfileName;

}

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From source file:com.ut.healthelink.service.hl7toTxt.java

public String TranslateHl7toTxt(String fileLocation, String fileName, int orgId) throws Exception {

    Organization orgDetails = organizationmanager.getOrganizationById(orgId);
    fileSystem dir = new fileSystem();

    dir.setDir(orgDetails.getcleanURL(), "templates");

    String templatefileName = orgDetails.getparsingTemplate();

    URLClassLoader loader = new URLClassLoader(
            new URL[] { new URL("file://" + dir.getDir() + templatefileName) });

    // Remove the .class extension
    Class cls = loader.loadClass(templatefileName.substring(0, templatefileName.lastIndexOf('.')));

    Constructor constructor = cls.getConstructor();

    Object HL7Obj = constructor.newInstance();

    Method myMethod = cls.getMethod("HL7toTxt", new Class[] { File.class });

    /* Get the uploaded HL7 File */
    fileLocation = fileLocation.replace("/Applications/bowlink/", "").replace("/home/bowlink/", "")
            .replace("/bowlink/", "");
    dir.setDirByName(fileLocation);//from w w  w . ja va  2s  .c om

    File hl7File = new File(dir.getDir() + fileName + ".hr");

    /* Create the output file */
    String newfileName = new StringBuilder()
            .append(hl7File.getName().substring(0, hl7File.getName().lastIndexOf("."))).append(".")
            .append("txt").toString();

    File newFile = new File(dir.getDir() + newfileName);

    if (newFile.exists()) {
        try {

            if (newFile.exists()) {
                int i = 1;
                while (newFile.exists()) {
                    int iDot = newfileName.lastIndexOf(".");
                    newFile = new File(dir.getDir() + newfileName.substring(0, iDot) + "_(" + ++i + ")"
                            + newfileName.substring(iDot));
                }
                newfileName = newFile.getName();
                newFile.createNewFile();
            } else {
                newFile.createNewFile();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

    } else {
        newFile.createNewFile();
        newfileName = newFile.getName();

    }

    FileWriter fw = new FileWriter(newFile, true);

    /* END */
    String fileRecords = (String) myMethod.invoke(HL7Obj, new Object[] { hl7File });

    fw.write(fileRecords);

    fw.close();

    return newfileName;

}

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From source file:com.xiovr.unibot.plugin.impl.PluginLoaderImpl.java

private Class<?> loadClass(File jarFile, String paramName) {
    try {//from www.j a  v  a  2 s.c  om
        Properties props = getPluginProps(jarFile);
        if (props == null)
            throw new IllegalArgumentException("No props file in " + jarFile.getName() + " found");

        String pluginClassName = props.getProperty(paramName);
        if (pluginClassName == null || pluginClassName.length() == 0) {
            return null;
        }

        URL jarURL = jarFile.toURI().toURL();
        //         URLClassLoader classLoader = new URLClassLoader(
        //               new URL[] { jarURL }, getClass().getClassLoader());
        URLClassLoader classLoader = new URLClassLoader(new URL[] { jarURL },
                org.springframework.util.ClassUtils.getDefaultClassLoader());
        Class<?> pluginClass = classLoader.loadClass(pluginClassName);
        //         classLoader.close();
        return pluginClass;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

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