1 files changed, 108 insertions, 0 deletions
diff --git a/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/extensibility/DefaultHttpPortAllocatorExtensionPoint.java b/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/extensibility/DefaultHttpPortAllocatorExtensionPoint.java
new file mode 100644
index 0000000000..5c5847f77b
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/extensibility/DefaultHttpPortAllocatorExtensionPoint.java
@@ -0,0 +1,108 @@
+/*
+ * 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.extensibility;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.extensibility.ServiceDeclaration;
+import org.apache.tuscany.sca.extensibility.ServiceHelper;
+
+public class DefaultHttpPortAllocatorExtensionPoint implements HttpPortAllocatorExtensionPoint {
+    private final static Logger logger = Logger.getLogger(DefaultHttpPortAllocatorExtensionPoint.class.getName());
+
+    private ExtensionPointRegistry registry;
+    private List<HttpPortAllocator> portAllocators = new ArrayList<HttpPortAllocator>();
+    private boolean loaded;
+
+    public DefaultHttpPortAllocatorExtensionPoint(ExtensionPointRegistry registry) {
+        this.registry = registry;
+    }
+    public void addPortAllocators(HttpPortAllocator httpPortAllocator) {
+        this.portAllocators.add(httpPortAllocator);
+    }
+
+    public void removePortAllocators(HttpPortAllocator httpPortAllocator) {
+        this.portAllocators.remove(httpPortAllocator);
+    }
+
+    public List<HttpPortAllocator> getPortAllocators() {
+        loadServletHosts();
+        return this.portAllocators;
+    }
+
+    private synchronized void loadServletHosts() {
+        if (loaded)
+            return;
+
+        // Get the activator service declarations
+        Collection<ServiceDeclaration> activatorDeclarations;
+        try {
+            // Load the port allocators by ranking
+            activatorDeclarations = registry.getServiceDiscovery().getServiceDeclarations(HttpPortAllocator.class.getName(), true);
+        } catch (IOException e) {
+            throw new IllegalStateException(e);
+        }
+
+        // Load and instantiate http port allocators
+        for (ServiceDeclaration allocatorDeclaration : activatorDeclarations) {
+            if (logger.isLoggable(Level.FINE)) {
+                logger.fine("Loading " + allocatorDeclaration.getClassName());
+            }
+            HttpPortAllocator allocator = null;
+            try {
+                Class<HttpPortAllocator> allocatorClass = (Class<HttpPortAllocator>)allocatorDeclaration.loadClass();
+                try {
+                    allocator = ServiceHelper.newInstance(allocatorClass, ExtensionPointRegistry.class, registry);
+                } catch (NoSuchMethodException e) {
+                    try {
+                        allocator =
+                            ServiceHelper.newInstance(allocatorClass,
+                                          new Class<?>[] {ExtensionPointRegistry.class, Map.class},
+                                          registry,
+                                          allocatorDeclaration.getAttributes());
+
+                    } catch (NoSuchMethodException e1) {
+                        allocator = ServiceHelper.newInstance(allocatorClass);
+
+                    }
+                }
+            } catch (Throwable e) {
+                String optional = allocatorDeclaration.getAttributes().get("optional");
+                if ("true".equalsIgnoreCase(optional)) {
+                    // If the optional flag is true, just log the error
+                    logger.log(Level.SEVERE, e.getMessage(), e);
+                    continue;
+                } else {
+                    throw new IllegalArgumentException(e);
+                }
+            }
+            addPortAllocators(allocator);
+        }
+
+        loaded = true;
+    }
+}