com.acciente.induction.init.ClassLoaderInitializer.java Source code

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Here is the source code for com.acciente.induction.init.ClassLoaderInitializer.java

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/*
 * Copyright 2008-2013 Acciente, LLC
 *
 * Acciente, LLC licenses this file to you 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 com.acciente.induction.init;

import com.acciente.commons.loader.JavaCompiledClassDefLoader;
import com.acciente.commons.loader.ReloadingClassLoader;
import com.acciente.induction.init.config.Config;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * Internal.
 * This is helper class that focuses on setting up the primary classloader used
 * by the dispatcher servlet.
 *
 * @created Mar 15, 2008
 *
 * @author Adinath Raveendra Raj
 */
public class ClassLoaderInitializer {
    public static ClassLoader getClassLoader(Config.JavaClassPath oJavaClassPathConfig,
            ClassLoader oParentClassLoader) throws ClassNotFoundException {
        Log oLog;

        oLog = LogFactory.getLog(ClassLoaderInitializer.class);

        if (oJavaClassPathConfig.getDirList().size() == 0) {
            return oParentClassLoader;
        } else {
            ReloadingClassLoader oClassLoader = new ReloadingClassLoader(oParentClassLoader);

            // we will ignore any dependencies for classes in any of the following packages
            oClassLoader.addIgnoredClassNamePrefix("java.");
            oClassLoader.addIgnoredClassNamePrefix("javax.");
            oClassLoader.addIgnoredClassNamePrefix("com.acciente.");

            // if there is a classpath defined setup a reloading classloader to handle the specified directories
            for (int i = 0; i < oJavaClassPathConfig.getDirList().size(); i++) {
                if (oJavaClassPathConfig.getDirList().get(i) instanceof Config.JavaClassPath.CompiledDir) {
                    Config.JavaClassPath.CompiledDir oCompiledDir = (Config.JavaClassPath.CompiledDir) oJavaClassPathConfig
                            .getDirList().get(i);

                    oLog.info(
                            "configuring reloading classloader for compiled classes in: " + oCompiledDir.getDir());

                    // set up a compiled class definition loader
                    JavaCompiledClassDefLoader oJavaCompiledClassDefLoader = new JavaCompiledClassDefLoader();
                    oJavaCompiledClassDefLoader.setCompiledDirectory(oCompiledDir.getDir());
                    oJavaCompiledClassDefLoader.setPackageNamePrefix(oCompiledDir.getPackageNamePrefix());

                    // add the class def loader to the search list
                    oClassLoader.addClassDefLoader(oJavaCompiledClassDefLoader);
                }
            }

            return oClassLoader;
        }
    }
}

// EOF