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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.sca.host.webapp;
import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.net.URL;
import java.util.Enumeration;
import java.util.List;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.host.http.DefaultServletHostExtensionPoint;
import org.apache.tuscany.sca.host.http.ServletHost;
import org.apache.tuscany.sca.host.http.ServletHostExtensionPoint;
import org.apache.tuscany.sca.node.Node;
import org.apache.tuscany.sca.node.NodeFactory;
import org.apache.tuscany.sca.node.configuration.NodeConfiguration;
import org.apache.tuscany.sca.node.impl.NodeImpl;
public class ServletHostHelper {
public static final String DOMAIN_NAME_ATTR = "org.apache.tuscany.sca.domain.name";
public static final String SCA_NODE_ATTRIBUTE = Node.class.getName();
private static NodeFactory factory;
private static URL getResource(ServletContext servletContext, String location) throws IOException {
URI uri = URI.create(location);
if (uri.isAbsolute()) {
return uri.toURL();
} else {
String path = location;
if (!path.startsWith("/")) {
path = "/" + path;
}
URL url = servletContext.getResource(path);
if (url != null && url.getProtocol().equals("jndi")) {
//this is Tomcat case, we should use getRealPath
File warRootFile = new File(servletContext.getRealPath(path));
return warRootFile.toURI().toURL();
} else {
//this is Jetty case
return url;
}
}
}
@SuppressWarnings("unchecked")
private static NodeConfiguration getNodeConfiguration(ServletContext servletContext) throws IOException {
NodeConfiguration configuration = null;
String nodeConfigURI = (String) servletContext.getAttribute("node.configuration");
if (nodeConfigURI != null) {
URL url = getResource(servletContext, nodeConfigURI);
configuration = factory.loadConfiguration(url.openStream(), url);
} else {
configuration = factory.createNodeConfiguration();
configuration.setDomainURI(factory.getDomainURI());
Enumeration<String> names = servletContext.getAttributeNames();
while (names.hasMoreElements()) {
String name = names.nextElement();
if (name.startsWith("contribution.")) {
String contrib = (String) servletContext.getAttribute(name);
if (contrib != null) {
configuration.addContribution(getResource(servletContext, contrib));
}
}
}
if (configuration.getContributions().isEmpty()) {
// TODO: Which path should be the default root
configuration.addContribution(getResource(servletContext, "/"));
}
URL composite = getResource(servletContext, "/WEB-INF/web.composite");
if (composite != null) {
configuration.getContributions().get(0).addDeploymentComposite(composite);
}
String nodeURI = (String) servletContext.getAttribute("node.uri");
if (nodeURI == null) {
nodeURI = new File(servletContext.getRealPath("/")).getName();
}
configuration.setURI(nodeURI);
String domainURI = (String) servletContext.getAttribute("domain.uri");
if (domainURI != null) {
configuration.setDomainURI(domainURI);
}
}
return configuration;
}
public static ServletHost init(final ServletContext servletContext) {
Node node = (Node)servletContext.getAttribute(SCA_NODE_ATTRIBUTE);
if (node == null) {
try {
String domainName = (String)servletContext.getAttribute(DOMAIN_NAME_ATTR);
if (domainName != null) {
factory = NodeFactory.getInstance(domainName);
} else {
factory = NodeFactory.newInstance();
}
for (Enumeration<String> e = servletContext.getInitParameterNames(); e.hasMoreElements();) {
String name = e.nextElement();
String value = servletContext.getInitParameter(name);
servletContext.setAttribute(name, value);
}
node = createNode(servletContext);
servletContext.setAttribute(SCA_NODE_ATTRIBUTE, node);
getServletHost(node).init(new ServletConfig() {
public String getInitParameter(String name) {
return servletContext.getInitParameter(name);
}
public Enumeration<?> getInitParameterNames() {
return servletContext.getInitParameterNames();
}
public ServletContext getServletContext() {
return servletContext;
}
public String getServletName() {
return servletContext.getServletContextName();
}
});
} catch (ServletException e) {
throw new RuntimeException(e);
}
}
return getServletHost(node);
}
private static WebAppServletHost getServletHost(Node node) {
NodeImpl nodeImpl = (NodeImpl)node;
ExtensionPointRegistry eps = nodeImpl.getExtensionPoints();
ServletHostExtensionPoint servletHosts = eps.getExtensionPoint(ServletHostExtensionPoint.class);
List<ServletHost> hosts = servletHosts.getServletHosts();
if (hosts == null || hosts.size() < 1) {
throw new IllegalStateException("No ServletHost found");
}
for (ServletHost servletHost : hosts) {
if ("webapp".equals(servletHost.getName())) {
if(servletHost instanceof DefaultServletHostExtensionPoint.LazyServletHost) {
return (WebAppServletHost) ((DefaultServletHostExtensionPoint.LazyServletHost) servletHost).getServletHost();
} else if(servletHost instanceof WebAppServletHost) {
return (WebAppServletHost) servletHost;
}
}
}
throw new IllegalStateException("No WebApp Servlet host is configured");
}
private static Node createNode(final ServletContext servletContext) throws ServletException {
NodeConfiguration configuration;
try {
configuration = getNodeConfiguration(servletContext);
} catch (IOException e) {
throw new ServletException(e);
}
Node node = factory.createNode(configuration).start();
return node;
}
public static void stop(ServletContext servletContext) {
Node node = (Node)servletContext.getAttribute(ServletHostHelper.SCA_NODE_ATTRIBUTE);
if (node != null) {
node.stop();
servletContext.setAttribute(ServletHostHelper.SCA_NODE_ATTRIBUTE, null);
}
}
}
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