Simplify the HttpPortAllocator and allows the default implementation to

allocate the port based on the system property/environment var (HTTP_PORT/
HTTPS_PORT) or a free port if the value is 0.

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1095242 13f79535-47bb-0310-9956-ffa450edef68

4 files changed, 64 insertions, 206 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
deleted file mode 100644
index 5c5847f77b..0000000000
--- a/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/extensibility/DefaultHttpPortAllocatorExtensionPoint.java
+++ /dev/null
@@ -1,108 +0,0 @@
-/*
- * 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;
-    }
-}
diff --git a/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/extensibility/ExtensibleHttpPortAllocator.java b/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/extensibility/ExtensibleHttpPortAllocator.java
deleted file mode 100644
index c1f3083cf8..0000000000
--- a/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/extensibility/ExtensibleHttpPortAllocator.java
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * 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 org.apache.tuscany.sca.core.ExtensionPointRegistry;
-import org.apache.tuscany.sca.core.UtilityExtensionPoint;
-import org.apache.tuscany.sca.host.http.HttpScheme;
-
-public class ExtensibleHttpPortAllocator implements HttpPortAllocator {
-    HttpPortAllocatorExtensionPoint httpPortAllocators;
-
-    public ExtensibleHttpPortAllocator(ExtensionPointRegistry registry) {
-        this.httpPortAllocators = registry.getExtensionPoint(HttpPortAllocatorExtensionPoint.class);
-    }
-
-    public static ExtensibleHttpPortAllocator getInstance(ExtensionPointRegistry registry) {
-        UtilityExtensionPoint utilityExtensionPoint = registry.getExtensionPoint(UtilityExtensionPoint.class);
-        return utilityExtensionPoint.getUtility(ExtensibleHttpPortAllocator.class);
-    }
-
-    public int getDefaultPort(HttpScheme scheme) {
-        if(this.httpPortAllocators.getPortAllocators().isEmpty()) {
-            throw new RuntimeException("No port allocators registered");
-        }
-
-        return this.httpPortAllocators.getPortAllocators().get(0).getDefaultPort(scheme);
-    }
-}
diff --git a/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/extensibility/HttpPortAllocatorExtensionPoint.java b/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/extensibility/HttpPortAllocatorExtensionPoint.java
deleted file mode 100644
index b7e748f217..0000000000
--- a/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/extensibility/HttpPortAllocatorExtensionPoint.java
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * 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.util.List;
-
-/**
- * Extension Point to allow registration of different port allocators
- * @version $Rev$ $Date$
- */
-public interface HttpPortAllocatorExtensionPoint {
-
-    /**
-     * Register a new http port allocator
-     * @param httpPortAllocator the http port allocator
-     */
-    void addPortAllocators(HttpPortAllocator httpPortAllocator);
-
-    /**
-     * Unregister a http port allocator
-     * @param httpPortAllocator the http port allocator
-     */
-    void removePortAllocators(HttpPortAllocator httpPortAllocator);
-
-    /**
-     * Get a list of all registered http port allocators
-     * @return the list of http port allocators
-     */
-    List<HttpPortAllocator> getPortAllocators();
-}
diff --git a/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/extensibility/impl/DefaultHttpPortAllocatorImpl.java b/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/extensibility/impl/DefaultHttpPortAllocatorImpl.java
index b345402d8b..af41e85213 100644
--- a/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/extensibility/impl/DefaultHttpPortAllocatorImpl.java
+++ b/sca-java-2.x/trunk/modules/host-http/src/main/java/org/apache/tuscany/sca/host/http/extensibility/impl/DefaultHttpPortAllocatorImpl.java
@@ -19,6 +19,11 @@
 
 package org.apache.tuscany.sca.host.http.extensibility.impl;
 
+import java.io.IOException;
+import java.net.ServerSocket;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+
 import org.apache.tuscany.sca.host.http.HttpScheme;
 import org.apache.tuscany.sca.host.http.extensibility.HttpPortAllocator;
 
@@ -27,15 +32,68 @@ public class DefaultHttpPortAllocatorImpl implements HttpPortAllocator {
     public int getDefaultPort(HttpScheme scheme) {
         int port = 0;
 
-        if(scheme == HttpScheme.HTTP) {
-            port = 8080;
-        } else if(scheme == HttpScheme.HTTPS) {
-           port = 8443;
-        } else {
-            throw new IllegalArgumentException("Scheme not support : " + scheme.toString());
+        if (scheme == null || scheme == HttpScheme.HTTP) {
+            try {
+                port = Integer.parseInt(getVariable("HTTP_PORT", "8080"));
+                if (port == 0) {
+                    port = findFreePort(8080, 9080);
+                }
+            } catch (NumberFormatException e) {
+                port = 8080;
+            }
+        } else if (scheme == HttpScheme.HTTPS) {
+            try {
+                port = Integer.parseInt(getVariable("HTTPS_PORT", "8443"));
+                if (port == 0) {
+                    port = findFreePort(8443, 9443);
+                }
+            } catch (NumberFormatException e) {
+                port = 8443;
+            }
         }
 
         return port;
+
+    }
+
+    private static String getVariable(final String variableName, final String defaultValue) {
+        return AccessController.doPrivileged(new PrivilegedAction<String>() {
+            public String run() {
+                String value = System.getProperty(variableName);
+                if (value == null || value.length() == 0) {
+                    value = System.getenv(variableName);
+                    if (value == null || value.length() == 0) {
+                        value = defaultValue;
+                    }
+                }
+                return value;
+            }
+        });
+    }
+
+    private int findFreePort(final int start, final int end) {
+        return AccessController.doPrivileged(new PrivilegedAction<Integer>() {
+            public Integer run() {
+                for (int p = start; p <= end; p++) {
+                    ServerSocket socket = null;
+                    try {
+                        socket = new ServerSocket(p);
+                        return p;
+                    } catch (IOException e) {
+                        // Ignore
+                    } finally {
+                        if (socket != null) {
+                            try {
+                                socket.close();
+                            } catch (IOException e) {
+                                // Ignore
+                            }
+                        }
+                    }
+                }
+                return -1;
+            }
+        });
     }
 
 }