diff options
Diffstat (limited to 'sca-java-2.x/trunk/modules/host-http/src')
7 files changed, 649 insertions, 0 deletions
diff --git a/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/DefaultResourceServlet.java b/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/DefaultResourceServlet.java new file mode 100644 index 0000000000..3de0b9f5a7 --- /dev/null +++ b/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/DefaultResourceServlet.java @@ -0,0 +1,86 @@ +/* + * 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.http; + +import java.io.IOException; +import java.io.InputStream; +import java.io.OutputStream; +import java.net.URL; +import java.net.URLDecoder; + +import javax.servlet.Servlet; +import javax.servlet.ServletException; +import javax.servlet.http.HttpServlet; +import javax.servlet.http.HttpServletRequest; +import javax.servlet.http.HttpServletResponse; + +/** + * A minimal implementation of a Servlet that serves documents in a document root + * directory. + * + * A Servlet host implementation is not required to use this implementation and can map + * the URI and document root to a more complete and more efficient implementation of + * a resource Servlet, for example the Tomcat or Jetty default Servlets. + * + * @version $Rev$ $Date$ + */ +public class DefaultResourceServlet extends HttpServlet implements Servlet { + private static final long serialVersionUID = 2865466417329430610L; + + private String documentRoot; + + /** + * Constructs a new ResourceServlet + * @param documentRoot the document root + */ + public DefaultResourceServlet(String documentRoot) { + this.documentRoot = documentRoot; + } + + /** + * Returns the document root. + * @return the document root + */ + public String getDocumentRoot() { + return documentRoot; + } + + @Override + protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { + + // Determine the resource path + String path = URLDecoder.decode(request.getRequestURI().substring(request.getServletPath().length()), "UTF-8"); + if (path.startsWith("/")) { + path = path.substring(1); + } + URL url = new URL(documentRoot + '/' + path); + + // Write the resource + InputStream is = url.openStream(); + OutputStream os = response.getOutputStream(); + byte[] buffer = new byte[2048]; + for (;;) { + int n = is.read(buffer); + if (n <= 0) + break; + os.write(buffer, 0, n); + } + } +} diff --git a/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/DefaultServletHostExtensionPoint.java b/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/DefaultServletHostExtensionPoint.java new file mode 100644 index 0000000000..04b2f4c199 --- /dev/null +++ b/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/DefaultServletHostExtensionPoint.java @@ -0,0 +1,198 @@ +/* + * 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.http; + +import java.io.IOException; +import java.lang.reflect.Constructor; +import java.net.URL; +import java.util.ArrayList; +import java.util.Collection; +import java.util.List; + +import javax.servlet.RequestDispatcher; +import javax.servlet.Servlet; + +import org.apache.tuscany.sca.core.ExtensionPointRegistry; +import org.apache.tuscany.sca.core.LifeCycleListener; +import org.apache.tuscany.sca.extensibility.ServiceDeclaration; +import org.apache.tuscany.sca.extensibility.ServiceDiscovery; + +/** + * Default implementation of a Servlet host extension point. + * + * @version $Rev$ $Date$ + */ +public class DefaultServletHostExtensionPoint implements ServletHostExtensionPoint, LifeCycleListener { + + private List<ServletHost> servletHosts = new ArrayList<ServletHost>(); + private boolean loaded; + + private ExtensionPointRegistry registry; + + public DefaultServletHostExtensionPoint(ExtensionPointRegistry registry) { + this.registry = registry; + } + + public void addServletHost(ServletHost servletHost) { + servletHosts.add(servletHost); + if (servletHost instanceof LifeCycleListener) { + ((LifeCycleListener)servletHost).start(); + } + } + + public void removeServletHost(ServletHost servletHost) { + servletHosts.remove(servletHost); + if (servletHost instanceof LifeCycleListener) { + ((LifeCycleListener)servletHost).stop(); + } + } + + public List<ServletHost> getServletHosts() { + loadServletHosts(); + return servletHosts; + } + + private synchronized void loadServletHosts() { + if (loaded) + return; + + // Get the databinding service declarations + Collection<ServiceDeclaration> sds; + try { + sds = registry.getServiceDiscovery().getServiceDeclarations(ServletHost.class, true); + } catch (IOException e) { + throw new IllegalStateException(e); + } + + // Load data bindings + for (ServiceDeclaration sd : sds) { + // Create a data binding wrapper and register it + ServletHost servletHost = new LazyServletHost(sd); + addServletHost(servletHost); + } + + loaded = true; + } + + /** + * A data binding facade allowing data bindings to be lazily loaded and + * initialized. + */ + public class LazyServletHost implements ServletHost, LifeCycleListener { + private ServiceDeclaration sd; + private ServletHost host; + + /** + * @param sd + */ + public LazyServletHost(ServiceDeclaration sd) { + super(); + this.sd = sd; + } + + public synchronized ServletHost getServletHost() { + if (host == null) { + try { + Class<?> cls = sd.loadClass(); + Constructor<?> ctor = null; + try { + ctor = cls.getConstructor(ExtensionPointRegistry.class); + host = (ServletHost)ctor.newInstance(registry); + } catch (NoSuchMethodException e) { + ctor = cls.getConstructor(); + host = (ServletHost)ctor.newInstance(); + } + if(host instanceof LifeCycleListener) { + ((LifeCycleListener) host).start(); + } + } catch (Throwable e) { + throw new IllegalStateException(e); + } + } + return host; + } + + public void addServletMapping(String uri, Servlet servlet) throws ServletMappingException { + getServletHost().addServletMapping(uri, servlet); + } + + public String getContextPath() { + return getServletHost().getContextPath(); + } + + public int getDefaultPort() { + return getServletHost().getDefaultPort(); + } + + public RequestDispatcher getRequestDispatcher(String uri) throws ServletMappingException { + return getServletHost().getRequestDispatcher(uri); + } + + public Servlet getServletMapping(String uri) throws ServletMappingException { + return getServletHost().getServletMapping(uri); + } + + public URL getURLMapping(String uri) { + return getServletHost().getURLMapping(uri); + } + + public Servlet removeServletMapping(String uri) throws ServletMappingException { + return getServletHost().removeServletMapping(uri); + } + + public void setAttribute(String name, Object value) { + getServletHost().setAttribute(name, value); + } + + public void setContextPath(String path) { + getServletHost().setContextPath(path); + } + + public void setDefaultPort(int port) { + getServletHost().setDefaultPort(port); + } + + public String getName() { + return sd.getAttributes().get("name"); + } + + public void start() { + } + + public void stop() { + if (host instanceof LifeCycleListener) { + ((LifeCycleListener)host).stop(); + } + } + } + + public void start() { + } + + public void stop() { + for (ServletHost host : servletHosts) { + if (host instanceof LifeCycleListener) { + ((LifeCycleListener)host).stop(); + } + } + servletHosts.clear(); + registry = null; + } +} diff --git a/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/ExtensibleServletHost.java b/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/ExtensibleServletHost.java new file mode 100644 index 0000000000..4dfa1dd8a3 --- /dev/null +++ b/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/ExtensibleServletHost.java @@ -0,0 +1,131 @@ +/* + * 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.http; + +import java.net.URL; + +import javax.servlet.RequestDispatcher; +import javax.servlet.Servlet; + +/** + * Default implementation of an extensible Servlet host. + * + * @version $Rev$ $Date$ + */ +public class ExtensibleServletHost implements ServletHost { + + private ServletHostExtensionPoint servletHosts; + + public ExtensibleServletHost(ServletHostExtensionPoint servletHosts) { + this.servletHosts = servletHosts; + } + + public void setDefaultPort(int port) { + if (servletHosts.getServletHosts().isEmpty()) { + throw new ServletMappingException("No servlet host available"); + } + + for (ServletHost servletHost: servletHosts.getServletHosts()) { + servletHost.setDefaultPort(port); + } + } + + private ServletHost getDefaultServletHost() { + return servletHosts.getServletHosts().get(0); + } + + public int getDefaultPort() { + if (servletHosts.getServletHosts().isEmpty()) { + throw new ServletMappingException("No servlet host available"); + } + + return getDefaultServletHost().getDefaultPort(); + } + + public void addServletMapping(String uri, Servlet servlet) throws ServletMappingException { + if (servletHosts.getServletHosts().isEmpty()) { + throw new ServletMappingException("No servlet host available"); + } + + // TODO implement selection of the correct Servlet host based on the mapping + // For now just select the first one + getDefaultServletHost().addServletMapping(uri, servlet); + } + + public Servlet getServletMapping(String uri) throws ServletMappingException { + if (servletHosts.getServletHosts().isEmpty()) { + throw new ServletMappingException("No servlet host available"); + } + + // TODO implement selection of the correct Servlet host based on the mapping + // For now just select the first one + return getDefaultServletHost().getServletMapping(uri); + } + + public Servlet removeServletMapping(String uri) throws ServletMappingException { + if (servletHosts.getServletHosts().isEmpty()) { + throw new ServletMappingException("No servlet host available"); + } + + // TODO implement selection of the correct Servlet host based on the mapping + // For now just select the first one + return getDefaultServletHost().removeServletMapping(uri); + } + + public RequestDispatcher getRequestDispatcher(String uri) throws ServletMappingException { + if (servletHosts.getServletHosts().isEmpty()) { + throw new ServletMappingException("No servlet host available"); + } + + // TODO implement selection of the correct Servlet host based on the mapping + // For now just select the first one + return getDefaultServletHost().getRequestDispatcher(uri); + } + + public String getContextPath() { + if (servletHosts.getServletHosts().isEmpty()) { + throw new ServletMappingException("No servlet host available"); + } + + // TODO implement selection of the correct Servlet host based on the mapping + // For now just select the first one + return getDefaultServletHost().getContextPath(); + } + + public URL getURLMapping(String uri) { + if (servletHosts.getServletHosts().isEmpty()) { + throw new ServletMappingException("No servlet host available"); + } + + return getDefaultServletHost().getURLMapping(uri); + } + + public void setContextPath(String path) { + getDefaultServletHost().setContextPath(path); + } + + public void setAttribute(String name, Object value) { + getDefaultServletHost().setAttribute(name, value); + } + + public String getName() { + return getDefaultServletHost().getName(); + } +} diff --git a/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/ServletHost.java b/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/ServletHost.java new file mode 100644 index 0000000000..dffc1e73d4 --- /dev/null +++ b/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/ServletHost.java @@ -0,0 +1,120 @@ +/* + * 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.http; + +import java.net.URL; + +import javax.servlet.RequestDispatcher; +import javax.servlet.Servlet; + +/** + * Interface implemented by host environments that allow Servlets to be + * registered. + * <p/> + * This interface allows a system service to register a Servlet + * to handle inbound requests. + * + * @version $Rev$ $Date$ + */ +public interface ServletHost { + + /** + * Sets the default port for the server. + * + * @param port the default port + */ + void setDefaultPort(int port); + + /** + * Returns the default port for the server. + * + * @return the default port + */ + int getDefaultPort(); + + /** + * Add a mapping for an instance of a Servlet. This requests that the + * Servlet container direct all requests to the designated mapping to the + * supplied Servlet instance. + * + * @param uri the URI-mapping for the Servlet + * @param servlet the Servlet that should be invoked + * @throws ServletMappingException + */ + void addServletMapping(String uri, Servlet servlet) throws ServletMappingException; + + /** + * Remove a Servlet mapping. This directs the Servlet container not to direct + * any more requests to a previously registered Servlet. + * + * @param uri the URI-mapping for the Servlet + * @return the Servlet that was registered to the mapping, null if nothing + * was registered to the mapping + * @throws ServletMappingException + */ + Servlet removeServletMapping(String uri) throws ServletMappingException; + + /** + * Returns the Servlet mapped to the given URI. + * + * @param uri the URI-mapping for the Servlet + * @return the Servlet registered with the mapping + * @throws ServletMappingException + */ + Servlet getServletMapping(String uri) throws ServletMappingException; + + /** + * Returns a Servlet request dispatcher for the Servlet mapped to the specified URI. + * + * @param uri the URI mapped to a Servlet + * @return a RequestDispatcher that can be used to dispatch requests to + * that Servlet + * @throws ServletMappingException + */ + RequestDispatcher getRequestDispatcher(String uri) throws ServletMappingException; + + /** + * Returns the portion of the request URI that indicates the context of the request + * + * @return a String specifying the portion of the request URI that indicates the context of the request + */ + String getContextPath(); + + /** + * Sets the portion of the request URI that indicates the context of the request + * + * @param path the context path + */ + void setContextPath(String path); + + /** + * Returns the complete URL mapped to the specified URI. + * @return the URL mapped to the specified URI + */ + URL getURLMapping(String uri); + + /** + * Set an attribute in the application ServletContext + * @param name the name of the attribute + * @param value the attribute value + */ + void setAttribute(String name, Object value); + + String getName(); +} diff --git a/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/ServletHostExtensionPoint.java b/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/ServletHostExtensionPoint.java new file mode 100644 index 0000000000..fbd085ba2b --- /dev/null +++ b/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/ServletHostExtensionPoint.java @@ -0,0 +1,51 @@ +/* + * 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.http; + +import java.util.List; + +/** + * An extension point for Servlet hosts. + * + * @version $Rev$ $Date$ + */ +public interface ServletHostExtensionPoint { + + /** + * Adds a Servlet host extension. + * + * @param servletHost + */ + void addServletHost(ServletHost servletHost); + + /** + * Removes a Servlet host extension. + * + * @param servletHost + */ + void removeServletHost(ServletHost servletHost); + + /** + * Returns a list of Servlet host extensions. + * + * @return + */ + List<ServletHost> getServletHosts(); + +} diff --git a/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/ServletMappingException.java b/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/ServletMappingException.java new file mode 100644 index 0000000000..ae66c44c3e --- /dev/null +++ b/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/ServletMappingException.java @@ -0,0 +1,44 @@ +/* + * 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.http; + +/** + * Indicates an exception while registering a Servlet mapping. + * + * @version $Rev$ $Date$ + */ +public class ServletMappingException extends RuntimeException { + private static final long serialVersionUID = 1L; + + public ServletMappingException() { + super(); + } + + public ServletMappingException(String message) { + super(message); + } + + public ServletMappingException(String message, Throwable cause) { + super(message, cause); + } + + public ServletMappingException(Throwable cause) { + super(cause); + } +} diff --git a/sca-java-2.x/trunk/modules/host-http/src/main/resources/META-INF/services/org.apache.tuscany.sca.host.http.ServletHostExtensionPoint b/sca-java-2.x/trunk/modules/host-http/src/main/resources/META-INF/services/org.apache.tuscany.sca.host.http.ServletHostExtensionPoint new file mode 100644 index 0000000000..d2d165d6f3 --- /dev/null +++ b/sca-java-2.x/trunk/modules/host-http/src/main/resources/META-INF/services/org.apache.tuscany.sca.host.http.ServletHostExtensionPoint @@ -0,0 +1,19 @@ +# 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.
+
+org.apache.tuscany.sca.host.http.DefaultServletHostExtensionPoint
+
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