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Diffstat (limited to 'branches/sca-java-2.0-M4/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/ServletHostHelper.java')
-rw-r--r-- | branches/sca-java-2.0-M4/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/ServletHostHelper.java | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/branches/sca-java-2.0-M4/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/ServletHostHelper.java b/branches/sca-java-2.0-M4/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/ServletHostHelper.java new file mode 100644 index 0000000000..4ad9519ad8 --- /dev/null +++ b/branches/sca-java-2.0-M4/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/ServletHostHelper.java @@ -0,0 +1,188 @@ +/* + * 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); + } + } +} |