Example usage for org.apache.commons.discovery.resource ClassLoaders put

Introduction

In this page you can find the example usage for org.apache.commons.discovery.resource ClassLoaders put.

Prototype

public void put(ClassLoader classLoader) 

Source Link

Document

Specify a new class loader to be used in searching.

Usage

From source file:org.apache.axis.components.encoding.XMLEncoderFactory.java

/**
 Look for file META-INF/services/org.apache.axis.components.encoding.XMLEncoder
 in all the JARS, get the classes listed in those files and add them to 
 encoders list if they are valid encoders. 
        //from   w  w  w  .j a v  a2s  .  co  m
 Here is how the scheme would work.
        
 A company providing a new encoder will jar up their encoder related
 classes in a JAR file. The following file containing the name of the new 
 encoder class is also made part of this JAR file. 
        
 META-INF/services/org.apache.axis.components.encoding.XMLEncoder
        
 By making this JAR part of the webapp, the new encoder will be 
 automatically discovered. 
 */
private static void loadPluggableEncoders() {
    ClassLoader clzLoader = XMLEncoder.class.getClassLoader();
    ClassLoaders loaders = new ClassLoaders();
    loaders.put(clzLoader);
    DiscoverServiceNames dsn = new DiscoverServiceNames(loaders);
    ResourceNameIterator iter = dsn.findResourceNames(PLUGABLE_PROVIDER_FILENAME);
    while (iter.hasNext()) {
        String className = iter.nextResourceName();
        try {
            Object o = Class.forName(className).newInstance();
            if (o instanceof XMLEncoder) {
                XMLEncoder encoder = (XMLEncoder) o;
                encoderMap.put(encoder.getEncoding(), encoder);
                encoderMap.put(encoder.getEncoding().toLowerCase(), encoder);
            }
        } catch (Exception e) {
            String msg = e + JavaUtils.LS + JavaUtils.stackToString(e);
            log.info(Messages.getMessage("exception01", msg));
            continue;
        }
    }
}

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From source file:org.apache.axis.deployment.wsdd.WSDDProvider.java

/**
   Look for file META-INF/services/org.apache.axis.deployment.wsdd.Provider
   in all the JARS, get the classes listed in those files and add them to 
   providers list if they are valid providers. 
        /*from   w  w  w .  j ava 2  s.c  o  m*/
   Here is how the scheme would work.
        
   A company providing a new provider will jar up their provider related
   classes in a JAR file. The following file containing the name of the new 
   provider class is also made part of this JAR file. 
        
   META-INF/services/org.apache.axis.deployment.wsdd.Provider
        
   By making this JAR part of the webapp, the new provider will be 
   automatically discovered. 
*/
private static void loadPluggableProviders() {
    ClassLoader clzLoader = WSDDProvider.class.getClassLoader();
    ClassLoaders loaders = new ClassLoaders();
    loaders.put(clzLoader);
    DiscoverServiceNames dsn = new DiscoverServiceNames(loaders);
    ResourceNameIterator iter = dsn.findResourceNames(PLUGABLE_PROVIDER_FILENAME);
    while (iter.hasNext()) {
        String className = iter.nextResourceName();
        try {
            Object o = Class.forName(className).newInstance();
            if (o instanceof WSDDProvider) {
                WSDDProvider provider = (WSDDProvider) o;
                String providerName = provider.getName();
                QName q = new QName(WSDDConstants.URI_WSDD_JAVA, providerName);
                providers.put(q, provider);
            }
        } catch (Exception e) {
            String msg = e + JavaUtils.LS + JavaUtils.stackToString(e);
            log.info(Messages.getMessage("exception01", msg));
            continue;
        }
    }
}

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From source file:org.codehaus.cargo.generic.AbstractFactoryRegistry.java

/**
 * Lists up {@link AbstractFactoryRegistry}s that are discovered.
 * /*from w ww.ja v  a 2  s  . c o m*/
 * @param classLoader See {@link #register(ClassLoader, DeployableFactory)} for more details.
 * @return always non-null but can be empty.
 */
private static List<AbstractFactoryRegistry> list(ClassLoader classLoader) {
    ClassLoader cl;
    ClassLoaders loaders = new ClassLoaders();

    cl = classLoader;
    if (cl != null) {
        loaders.put(cl);
    }

    cl = Thread.currentThread().getContextClassLoader();
    if (cl != null) {
        loaders.put(cl);
    }

    cl = AbstractFactoryRegistry.class.getClassLoader();
    if (cl != null) {
        loaders.put(cl);
    }

    cl = ResourceUtils.getResourceLoader();
    if (cl != null) {
        loaders.put(cl);
    }

    cl = JDKHooks.getJDKHooks().getSystemClassLoader();
    if (cl != null) {
        loaders.put(cl);
    }

    if (loaders.size() == 0) {
        // this is not our day. bail out.
        return Collections.EMPTY_LIST;
    }

    List<AbstractFactoryRegistry> registries = new ArrayList<AbstractFactoryRegistry>();
    Enumeration providers = Service.providers(new SPInterface(AbstractFactoryRegistry.class), loaders);
    while (providers.hasMoreElements()) {
        Object provider = providers.nextElement();
        if (provider instanceof AbstractFactoryRegistry) {
            registries.add((AbstractFactoryRegistry) provider);
        }
    }

    return registries;
}

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