diff options
Diffstat (limited to 'tags/java/sca/2.0-M3-RC3a/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/ServletHostHelper.java')
| -rw-r--r-- | tags/java/sca/2.0-M3-RC3a/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/ServletHostHelper.java | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/tags/java/sca/2.0-M3-RC3a/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/ServletHostHelper.java b/tags/java/sca/2.0-M3-RC3a/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/ServletHostHelper.java new file mode 100644 index 0000000000..c3aaf02e3a --- /dev/null +++ b/tags/java/sca/2.0-M3-RC3a/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/ServletHostHelper.java @@ -0,0 +1,183 @@ +/*
+ * 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.io.InputStream;
+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.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 SCA_NODE_ATTRIBUTE = Node.class.getName();
+ private static NodeFactory factory;
+
+ private static InputStream openStream(ServletContext servletContext, String location) throws IOException {
+ URI uri = URI.create(location);
+ if (uri.isAbsolute()) {
+ return uri.toURL().openStream();
+ } else {
+ String path = location;
+ if (!path.startsWith("/")) {
+ path = "/" + path;
+ }
+ return servletContext.getResourceAsStream(path);
+ }
+ }
+
+ 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 = servletContext.getInitParameter("node.configuration");
+ if (nodeConfigURI != null) {
+ configuration = factory.loadConfiguration(openStream(servletContext, nodeConfigURI));
+ } else {
+ configuration = factory.createNodeConfiguration();
+ Enumeration<String> names = servletContext.getInitParameterNames();
+ while (names.hasMoreElements()) {
+ String name = names.nextElement();
+ if (name.startsWith("contribution.")) {
+ String contrib = servletContext.getInitParameter(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 = servletContext.getInitParameter("node.uri");
+ if (nodeURI == null) {
+ nodeURI = new File(servletContext.getRealPath("/")).getName();
+ }
+ configuration.setURI(nodeURI);
+ String domainURI = servletContext.getInitParameter("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 {
+ factory = NodeFactory.newInstance();
+ 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");
+ }
+ ServletHost servletHost = hosts.get(0);
+ if (!(servletHost instanceof WebAppServletHost)) {
+ throw new IllegalStateException("unexpected ServletHost type: " + servletHost);
+ }
+ return (WebAppServletHost)servletHost;
+ }
+
+ 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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