diff options
author | slaws <slaws@13f79535-47bb-0310-9956-ffa450edef68> | 2009-04-16 17:02:00 +0000 |
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committer | slaws <slaws@13f79535-47bb-0310-9956-ffa450edef68> | 2009-04-16 17:02:00 +0000 |
commit | c86f42066a6a005d52f534694aecd6fdc1692217 (patch) | |
tree | 9e57cee4ff0779e10ddf9acbd5ceb14a1b8c5621 /branches/sca-java-1.x/modules/contribution-jee-impl/src/main/java/org/apache/tuscany/sca/contribution | |
parent | 15b54ac6767048ca2967ef741a8e4f807941e9bb (diff) |
TUSCANY-2972 - Sample code for fixing up classloaders for JEE archives. No where near done yet but allows us to experiment and explore the problems.
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@765687 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'branches/sca-java-1.x/modules/contribution-jee-impl/src/main/java/org/apache/tuscany/sca/contribution')
3 files changed, 372 insertions, 0 deletions
diff --git a/branches/sca-java-1.x/modules/contribution-jee-impl/src/main/java/org/apache/tuscany/sca/contribution/jee/impl/JEEClassLoader.java b/branches/sca-java-1.x/modules/contribution-jee-impl/src/main/java/org/apache/tuscany/sca/contribution/jee/impl/JEEClassLoader.java new file mode 100644 index 0000000000..bc009c50d7 --- /dev/null +++ b/branches/sca-java-1.x/modules/contribution-jee-impl/src/main/java/org/apache/tuscany/sca/contribution/jee/impl/JEEClassLoader.java @@ -0,0 +1,330 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF 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 org.apache.tuscany.sca.contribution.jee.impl; + +import java.io.IOException; +import java.net.MalformedURLException; +import java.net.URL; +import java.net.URLClassLoader; +import java.security.AccessController; +import java.security.PrivilegedAction; +import java.util.ArrayList; +import java.util.Collection; +import java.util.Collections; +import java.util.Enumeration; +import java.util.HashSet; +import java.util.List; + +import org.apache.tuscany.sca.contribution.Artifact; +import org.apache.tuscany.sca.contribution.Contribution; +import org.apache.tuscany.sca.contribution.Export; +import org.apache.tuscany.sca.contribution.Import; +import org.apache.tuscany.sca.contribution.java.JavaImport; +import org.apache.tuscany.sca.contribution.jee.EjbModuleInfo; +import org.apache.tuscany.sca.contribution.jee.JavaEEApplicationInfo; +import org.apache.tuscany.sca.contribution.jee.WebModuleInfo; + + +public class JEEClassLoader extends URLClassLoader { + + private Contribution contribution; + private List<WebModuleInfo> webModules = new ArrayList<WebModuleInfo>(); + private List<EjbModuleInfo> ejbModules = new ArrayList<EjbModuleInfo>(); + + /** + * Constructor for contribution ClassLoader + * + * @param contribution + * @param parent + * @throws MalformedURLException + */ + public JEEClassLoader(Contribution contribution, final ClassLoader parent) { + super(new URL[0], parent); + + this.contribution = contribution; + + // get the classloaders for any JEE archives references by the contribution + // TODO extend to case where JEE archive is outside the contribution + for (Artifact artifact : contribution.getArtifacts()){ + if (artifact.getModel() instanceof WebModuleInfo){ + WebModuleInfo webModuleInfo = (WebModuleInfo)artifact.getModel(); + webModules.add(webModuleInfo); + } else if (artifact.getModel() instanceof EjbModuleInfo){ + EjbModuleInfo ejbModuleInfo = (EjbModuleInfo)artifact.getModel(); + ejbModules.add(ejbModuleInfo); + } else if (artifact.getModel() instanceof JavaEEApplicationInfo){ + JavaEEApplicationInfo jeeAppInfo = (JavaEEApplicationInfo)artifact.getModel(); + webModules.addAll(jeeAppInfo.getWebModuleInfos().values()); + ejbModules.addAll(jeeAppInfo.getEjbModuleInfos().values()); + } + } + + } + + /* (non-Javadoc) + * @see java.net.URLClassLoader#findClass(java.lang.String) + * + * Search path for class: + * This contribution + * Imported contributions + */ + @Override + protected Class<?> findClass(String className) throws ClassNotFoundException { + + Class<?> clazz = null; + ClassNotFoundException cne = null; + + // ask each of the JEE archive classloaders in turn + // TODO This is a bad thing as two archives may have the same class + // but don't know how to avoid this + for (WebModuleInfo webModuleInfo : webModules){ + try { + clazz = webModuleInfo.getModuleClassloader().loadClass(className); + } catch (ClassNotFoundException e) { + cne = e; + } + + if (clazz != null){ + break; + } + } + + // We would expect the webapp classloaders to have an ejb classloader as parent + // but we have to go through the ebj module classloaders here just in case + // there are no webapps + for (EjbModuleInfo ejbModuleInfo : ejbModules){ + try { + clazz = ejbModuleInfo.getModuleClassloader().loadClass(className); + } catch (ClassNotFoundException e) { + cne = e; + } + + if (clazz != null){ + break; + } + } + + if (clazz == null){ + throw cne; + } + + return clazz; + } + + + /* (non-Javadoc) + * @see java.lang.ClassLoader#loadClass(java.lang.String, boolean) + * + * Search path for class: + * Parent ClassLoader + * This contribution + * Imported contributions + * + */ + @Override + protected synchronized Class<?> loadClass(String className, boolean resolveClass) + throws ClassNotFoundException { + + Class<?> clazz = null; + try { + + if (this.getParent() != null) + clazz = this.getParent().loadClass(className); + + } catch (ClassNotFoundException e) { + } + + if (clazz == null) + clazz = findClass(className); + + + if (resolveClass) + this.resolveClass(clazz); + return clazz; + + } + + + + /* + * (non-Javadoc) + * + * @see java.net.URLClassLoader#findResource(java.lang.String) + */ + @Override + public URL findResource(String name) { + + URL url = null; +/* + URL url = findResourceFromContribution(name); + + if (url == null) { + for (Import import_ : this.contribution.getImports()) { + if (resourceNameMatchesImport(name, import_)) { + // Delegate the resolution to the imported contribution + for (Contribution exportingContribution : ((JavaImportModelResolver)import_.getModelResolver()).getExportContributions()) { + + ClassLoader exportClassLoader = getExportClassLoader(exportingContribution); + if (exportClassLoader instanceof JEEClassLoader) { + + for (Export export : exportingContribution.getExports()) { + if (import_.match(export)) { + url = ((JEEClassLoader)exportClassLoader).findResourceFromContribution(name); + if (url != null) break; + } + } + if (url != null) break; + } + } + if (url != null) break; + } + } + + } +*/ + return url; + } + + + /* (non-Javadoc) + * @see java.net.URLClassLoader#findResources(java.lang.String) + */ + @Override + public Enumeration<URL> findResources(String name) throws IOException { + return Collections.enumeration(findResourceSet(name)); + } + + /* (non-Javadoc) + * @see java.lang.ClassLoader#getResource(java.lang.String) + * + * Find a resource. + * Search path for resource: + * Parent ClassLoader + * This contribution + * Imported contributions + */ + @Override + public URL getResource(String resName) { + + URL resource = null; + + if (this.getParent() != null) { + resource = this.getParent().getResource(resName); + } + if (resource == null) + resource = findResource(resName); + + return resource; + } + + + + /* (non-Javadoc) + * @see java.lang.ClassLoader#getResources(java.lang.String) + * + * Return list of resources from this contribution, resources + * imported through imported contributions and resources from parent + * ClassLoader. + */ + @Override + public Enumeration<URL> getResources(String resName) throws IOException { + + HashSet<URL> resourceSet = findResourceSet(resName); + addEnumerationToCollection(resourceSet, super.getResources(resName)); + + return Collections.enumeration(resourceSet); + } + + + /* + * Find set of resources + */ + private HashSet<URL> findResourceSet(String name) throws IOException { + + HashSet<URL> resources = new HashSet<URL>(); + +/* + addEnumerationToCollection(resources, super.findResources(name)); + + for (Import import_ : this.contribution.getImports()) { + if (!(import_ instanceof JavaImport)) { + continue; + } + if (resourceNameMatchesImport(name, import_)) { + // Delegate the resolution to the imported contribution + for (Contribution exportingContribution : ((JavaImportModelResolver)import_.getModelResolver()).getExportContributions()) { + + ClassLoader exportClassLoader = getExportClassLoader(exportingContribution); + if (exportClassLoader instanceof JEEClassLoader) { + + for (Export export : exportingContribution.getExports()) { + if (import_.match(export)) { + addEnumerationToCollection(resources, + ((JEEClassLoader)exportClassLoader).findResources(name)); + } + } + } + } + } + } +*/ + + return resources; + } + + + /* + * Find class from contribution. If class has already been loaded, return loaded class. + */ + private Class<?> findClassFromContribution(String className) throws ClassNotFoundException { + + Class<?> clazz = findLoadedClass(className); + if (clazz == null) + clazz = super.findClass(className); + return clazz; + + } + + /* + * Find resource from contribution. + */ + private URL findResourceFromContribution(String name) { + + return super.findResource(name); + } + + + /* + * Add an enumeration to a Collection + */ + private <T extends Object> void addEnumerationToCollection(Collection<T> collection, Enumeration<T> enumeration) { + + while (enumeration.hasMoreElements()) + collection.add(enumeration.nextElement()); + } + + + @Override + public String toString() { + return "SCA JEE ClassLoader, parent ClassLoader: " + getParent(); + } + + +} diff --git a/branches/sca-java-1.x/modules/contribution-jee-impl/src/main/java/org/apache/tuscany/sca/contribution/jee/impl/JEEClassLoaderProvider.java b/branches/sca-java-1.x/modules/contribution-jee-impl/src/main/java/org/apache/tuscany/sca/contribution/jee/impl/JEEClassLoaderProvider.java new file mode 100644 index 0000000000..73745fccef --- /dev/null +++ b/branches/sca-java-1.x/modules/contribution-jee-impl/src/main/java/org/apache/tuscany/sca/contribution/jee/impl/JEEClassLoaderProvider.java @@ -0,0 +1,41 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF 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 org.apache.tuscany.sca.contribution.jee.impl; + +import org.apache.tuscany.sca.contribution.Contribution; +import org.apache.tuscany.sca.contribution.java.ContributionClassLoaderProvider; +import org.apache.tuscany.sca.contribution.java.impl.ContributionClassLoader; +import org.apache.tuscany.sca.core.ExtensionPointRegistry; + +/** + * The default implementation of the ContributionClassLoaderProvider + */ +public class JEEClassLoaderProvider implements ContributionClassLoaderProvider { + + public JEEClassLoaderProvider(ExtensionPointRegistry registry) { + super(); + } + + public ClassLoader getClassLoader(Contribution contribution, ClassLoader parent) { + ContributionClassLoader ccl = new ContributionClassLoader(contribution, parent); + return new JEEClassLoader(contribution, ccl); + } + +} diff --git a/branches/sca-java-1.x/modules/contribution-jee-impl/src/main/java/org/apache/tuscany/sca/contribution/jee/impl/JavaEEIntrospectorImpl.java b/branches/sca-java-1.x/modules/contribution-jee-impl/src/main/java/org/apache/tuscany/sca/contribution/jee/impl/JavaEEIntrospectorImpl.java index 38a1573e63..b159a21fb2 100644 --- a/branches/sca-java-1.x/modules/contribution-jee-impl/src/main/java/org/apache/tuscany/sca/contribution/jee/impl/JavaEEIntrospectorImpl.java +++ b/branches/sca-java-1.x/modules/contribution-jee-impl/src/main/java/org/apache/tuscany/sca/contribution/jee/impl/JavaEEIntrospectorImpl.java @@ -89,6 +89,7 @@ public class JavaEEIntrospectorImpl implements JavaEEIntrospector { WebApp webApp = webModule.getWebApp(); ClassLoader classLoader = webModule.getClassLoader(); + wmInfo.setmoduleClassloader(classLoader); // Process Remote EJB References for (Map.Entry<String, EjbRef> entry : webApp.getEjbRefMap().entrySet()) { |