1 files changed, 87 insertions, 0 deletions
diff --git a/sandbox/ant/sca/branches/2.0-M2/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscovery.java b/sandbox/ant/sca/branches/2.0-M2/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscovery.java
new file mode 100644
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+++ b/sandbox/ant/sca/branches/2.0-M2/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscovery.java
@@ -0,0 +1,87 @@
+/*
+ * 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.extensibility;
+
+import java.io.IOException;
+import java.util.Set;
+import java.util.logging.Logger;
+
+/**
+ * Service discovery for Tuscany based on J2SE Jar service provider spec.
+ * Services are described using configuration files in META-INF/services.
+ * Service description specifies a class name followed by optional properties.
+ * 
+ *
+ * @version $Rev$ $Date$
+ */
+public final class ServiceDiscovery implements ServiceDiscoverer {
+    private static final Logger logger = Logger.getLogger(ServiceDiscovery.class.getName());
+
+    private final static ServiceDiscovery INSTANCE = new ServiceDiscovery();
+
+    private ServiceDiscoverer discoverer;
+    
+    private ServiceDiscovery() {
+        super();
+    }
+    /**
+     * Get an instance of Service discovery, one instance is created per
+     * ClassLoader that this class is loaded from
+     * 
+     * @return
+     */
+    public static ServiceDiscovery getInstance() {
+        return INSTANCE;
+    }
+
+    public ServiceDiscoverer getServiceDiscoverer() {
+        if (discoverer != null) {
+            return discoverer;
+        }
+        try {
+            //FIXME Remove that upside-down dependency
+            Class.forName("org.apache.tuscany.sca.extensibility.equinox.EquinoxServiceDiscoverer");
+            if (discoverer != null) {
+                return discoverer;
+            }
+        } catch (Throwable e) {
+        }
+        discoverer = new ContextClassLoaderServiceDiscoverer();
+        return discoverer;
+    }
+
+    public void setServiceDiscoverer(ServiceDiscoverer sd) {
+        if (discoverer != null) {
+            throw new IllegalStateException("The ServiceDiscoverer cannot be reset");
+        }
+        discoverer = sd;
+    }
+
+    public Set<ServiceDeclaration> getServiceDeclarations(String name) throws IOException {
+        Set<ServiceDeclaration> services = getServiceDiscoverer().getServiceDeclarations(name);
+        return services;
+    }
+
+    public ServiceDeclaration getFirstServiceDeclaration(final String name) throws IOException {
+        ServiceDeclaration service = getServiceDiscoverer().getFirstServiceDeclaration(name);
+        return service;
+    }
+    
+}