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/*
* 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.container.spring.loader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URL;
import java.util.jar.Attributes;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.jar.Manifest;
import javax.xml.namespace.QName;
import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
import static javax.xml.stream.XMLStreamConstants.START_ELEMENT;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import org.osoa.sca.Constants;
import org.osoa.sca.annotations.Reference;
import org.apache.tuscany.spi.deployer.DeploymentContext;
import org.apache.tuscany.spi.extension.LoaderExtension;
import org.apache.tuscany.spi.loader.LoaderException;
import org.apache.tuscany.spi.loader.LoaderRegistry;
import org.apache.tuscany.spi.loader.MissingResourceException;
import org.apache.tuscany.spi.model.ModelObject;
import org.apache.tuscany.spi.model.ReferenceDefinition;
import org.apache.tuscany.spi.model.ServiceDefinition;
import org.apache.tuscany.container.spring.model.SpringComponentType;
import org.apache.tuscany.container.spring.model.SpringImplementation;
import org.apache.tuscany.host.RuntimeInfo;
import org.apache.tuscany.runtime.webapp.WebappRuntimeInfo;
import org.springframework.core.io.Resource;
import org.springframework.core.io.UrlResource;
/**
* Loader for handling Spring <implementation.spring> elements.
*
* @version $Rev$ $Date$
*/
public class SpringImplementationLoader extends LoaderExtension<SpringImplementation> {
private static final QName IMPLEMENTATION_SPRING = new QName("http://www.osoa.org/xmlns/sca/1.0",
"implementation.spring");
private static final String APPLICATION_CONTEXT = "applicationContext.xml";
private static final QName SERVICE_ELEMENT = new QName(Constants.SCA_NS, "service");
private static final QName REFERENCE_ELEMENT = new QName(Constants.SCA_NS, "reference");
private final RuntimeInfo runtimeInfo;
public SpringImplementationLoader(@Reference LoaderRegistry registry, @Reference RuntimeInfo runtimeInfo) {
super(registry);
this.runtimeInfo = runtimeInfo;
}
public QName getXMLType() {
return IMPLEMENTATION_SPRING;
}
@SuppressWarnings("unchecked")
public SpringImplementation load(
ModelObject object, XMLStreamReader reader,
DeploymentContext deploymentContext)
throws XMLStreamException, LoaderException {
String locationAttr = reader.getAttributeValue(null, "location");
if (locationAttr == null) {
throw new MissingResourceException("No location supplied");
}
ClassLoader classLoader = deploymentContext.getClassLoader();
SpringImplementation implementation = new SpringImplementation(classLoader);
implementation.setApplicationResource(getApplicationContextResource(locationAttr, classLoader));
registry.loadComponentType(implementation, deploymentContext);
SpringComponentType type = implementation.getComponentType();
while (true) {
switch (reader.next()) {
case START_ELEMENT:
QName qname = reader.getName();
if (SERVICE_ELEMENT.equals(qname)) {
ServiceDefinition service =
(ServiceDefinition) registry.load(null, reader, deploymentContext);
if (!type.isExposeAllBeans()) {
URI name = service.getUri();
if (!type.getServiceDeclarations().containsKey(name)) {
throw new LoaderException("No service defined in Spring context for ", name.toString());
}
}
type.getDeclaredServices().put(service.getUri(), service);
} else if (REFERENCE_ELEMENT.equals(qname)) {
ReferenceDefinition reference =
(ReferenceDefinition) registry.load(null, reader, deploymentContext);
type.getDeclaredReferences().put(reference.getUri(), reference);
}
break;
case END_ELEMENT:
if (IMPLEMENTATION_SPRING.equals(reader.getName())) {
return implementation;
}
}
}
}
protected Resource getApplicationContextResource(String locationAttr, ClassLoader cl) throws LoaderException {
assert runtimeInfo != null;
File manifestFile = null;
File appXmlFile;
File locationFile = new File(locationAttr);
// if (!locationFile.isAbsolute()) {
// locationFile = new File(runtimeInfo.getApplicationRootDirectory(), locationAttr);
// }
if (!locationFile.exists()) {
// FIXME hack
URL url;
if (runtimeInfo instanceof WebappRuntimeInfo) {
try {
url = ((WebappRuntimeInfo) runtimeInfo).getServletContext().getResource(locationAttr);
} catch (MalformedURLException e) {
throw new LoaderException(e);
}
} else {
url = cl.getResource(locationAttr);
}
if (url != null) {
return new UrlResource(url);
}
throw new MissingResourceException(locationFile.toString());
}
if (locationFile.isDirectory()) {
try {
manifestFile = new File(locationFile, "META-INF/MANIFEST.MF");
if (manifestFile.exists()) {
Manifest mf = new Manifest(new FileInputStream(manifestFile));
Attributes mainAttrs = mf.getMainAttributes();
String appCtxPath = mainAttrs.getValue("Spring-Context");
if (appCtxPath != null) {
appXmlFile = new File(locationFile, appCtxPath);
if (appXmlFile.exists()) {
return new UrlResource(appXmlFile.toURL());
}
}
}
// no manifest-specified Spring context, use default
appXmlFile = new File(locationFile, APPLICATION_CONTEXT);
if (appXmlFile.exists()) {
return new UrlResource(appXmlFile.toURL());
}
} catch (IOException e) {
throw new LoaderException("Error reading manifest " + manifestFile);
}
} else {
try {
JarFile jf = new JarFile(locationFile);
JarEntry je;
Manifest mf = jf.getManifest();
if (mf != null) {
Attributes mainAttrs = mf.getMainAttributes();
String appCtxPath = mainAttrs.getValue("Spring-Context");
if (appCtxPath != null) {
je = jf.getJarEntry(appCtxPath);
if (je != null) {
// TODO return a Spring specific Resouce type for jars
return new UrlResource(new URL("jar:" + locationFile.toURL() + "!/" + appCtxPath));
}
}
}
je = jf.getJarEntry(APPLICATION_CONTEXT);
if (je != null) {
return new UrlResource(new URL("jar:" + locationFile.toURI().toURL() + "!" + APPLICATION_CONTEXT));
}
} catch (IOException e) {
// bad archive
// TODO: create a more appropriate exception type
throw new MissingResourceException(locationAttr, e);
}
}
throw new
MissingResourceException(APPLICATION_CONTEXT);
}
}
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