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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.URISyntaxException;
import java.net.URL;
import java.util.Enumeration;
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.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;
public class WebAppHelper {
private static final String ROOT = "/";
// The prefix for the parameters in web.xml which configure the folders that contain SCA contributions
private static final String CONTRIBUTIONS = "contributions";
// The prefix for the parameters in web.xml which configure the individual SCA contributions
private static final String CONTRIBUTION = "contribution";
private static final String NODE_CONFIGURATION = "node.configuration";
private static final String WEB_COMPOSITE = "/WEB-INF/web.composite";
private static final String DOMAIN_URI = "domain.uri";
private static final String NODE_URI = "node.uri";
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 WebAppServletHost host;
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(ROOT)) {
path = ROOT + 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,
URISyntaxException {
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();
Enumeration<String> names = servletContext.getAttributeNames();
while (names.hasMoreElements()) {
String name = names.nextElement();
if (name.equals(CONTRIBUTION) || name.startsWith(CONTRIBUTION + ".")) {
// We need to have a way to select one or more folders within the webapp as the contributions
String contrib = (String)servletContext.getAttribute(name);
if (contrib != null) {
File f = new File(getResource(servletContext, contrib).toURI());
configuration.addContribution(f.toURI().toURL());
}
} else if (name.equals(CONTRIBUTIONS) || name.startsWith(CONTRIBUTIONS + ".")) {
String contrib = (String)servletContext.getAttribute(name);
if (contrib != null) {
File f = new File(getResource(servletContext, contrib).toURI());
if (f.isDirectory()) {
for (File n : f.listFiles()) {
configuration.addContribution(n.toURI().toURL());
}
} else {
configuration.addContribution(f.toURI().toURL());
}
}
}
}
if (configuration.getContributions().isEmpty()) {
// TODO: Which path should be the default root
configuration.addContribution(getResource(servletContext, ROOT));
}
URL composite = getResource(servletContext, 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(ROOT)).getName();
}
configuration.setURI(nodeURI);
String domainURI = (String)servletContext.getAttribute(DOMAIN_URI);
if (domainURI != null) {
configuration.setDomainURI(domainURI);
} else {
domainURI = servletContext.getInitParameter("org.apache.tuscany.sca.defaultDomainURI");
if (domainURI != null) {
configuration.setDomainURI(getDomainName(domainURI));
configuration.setDomainRegistryURI(domainURI);
}
}
}
return configuration;
}
// TODO: Temp for now to get the old samples working till i clean up all the domain uri/name after the ML discussion.
private static String getDomainName(String configURI) {
String domainName;
if (configURI.startsWith("tuscany:vm:")) {
domainName = configURI.substring("tuscany:vm:".length());
} else if (configURI.startsWith("tuscany:")) {
int i = configURI.indexOf('?');
if (i == -1) {
domainName = configURI.substring("tuscany:".length());
} else {
domainName = configURI.substring("tuscany:".length(), i);
}
} else {
domainName = configURI;
}
return domainName;
}
public synchronized static ServletHost init(final ServletContext servletContext) {
if (host == null) {
try {
String configValue = servletContext.getInitParameter("org.apache.tuscany.sca.config");
if (configValue != null) {
factory = NodeFactory.newInstance(configValue);
} else {
factory = NodeFactory.newInstance();
}
ExtensionPointRegistry registry = factory.getExtensionPointRegistry();
ServletHostExtensionPoint servletHosts = registry.getExtensionPoint(ServletHostExtensionPoint.class);
servletHosts.setWebApp(true);
// TODO: why are the init parameters copied to the attributes?
for (Enumeration<?> e = servletContext.getInitParameterNames(); e.hasMoreElements();) {
String name = (String)e.nextElement();
String value = servletContext.getInitParameter(name);
servletContext.setAttribute(name, value);
}
host = getServletHost(servletContext);
} catch (ServletException e) {
throw new RuntimeException(e);
}
}
Node node = (Node)servletContext.getAttribute(SCA_NODE_ATTRIBUTE);
if (node == null) {
try {
node = createAndStartNode(servletContext);
} catch (ServletException e) {
throw new RuntimeException(e);
}
servletContext.setAttribute(SCA_NODE_ATTRIBUTE, node);
}
return host;
}
private static WebAppServletHost getServletHost(final ServletContext servletContext) throws ServletException {
WebAppServletHost host = getServletHost(factory);
host.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();
}
});
return host;
}
private static WebAppServletHost getServletHost(NodeFactory factory) {
ExtensionPointRegistry registry = factory.getExtensionPointRegistry();
return (WebAppServletHost)org.apache.tuscany.sca.host.http.ServletHostHelper.getServletHost(registry);
}
private static Node createAndStartNode(final ServletContext servletContext) throws ServletException {
NodeConfiguration configuration;
try {
configuration = getNodeConfiguration(servletContext);
} catch (IOException e) {
throw new ServletException(e);
} catch (URISyntaxException e) {
throw new ServletException(e);
}
Node node = factory.createNode(configuration).start();
return node;
}
public static void stop(ServletContext servletContext) {
Node node = (Node)servletContext.getAttribute(SCA_NODE_ATTRIBUTE);
if (node != null) {
node.stop();
servletContext.setAttribute(SCA_NODE_ATTRIBUTE, null);
}
}
public static NodeFactory getNodeFactory() {
return factory;
}
}
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