1 files changed, 70 insertions, 0 deletions
diff --git a/sandbox/ant/implementation-das/src/main/java/org/apache/tuscany/sca/implementation/das/DataAccessEngineManager.java b/sandbox/ant/implementation-das/src/main/java/org/apache/tuscany/sca/implementation/das/DataAccessEngineManager.java
new file mode 100644
index 0000000000..6701ca993c
--- /dev/null
+++ b/sandbox/ant/implementation-das/src/main/java/org/apache/tuscany/sca/implementation/das/DataAccessEngineManager.java
@@ -0,0 +1,70 @@
+/*
+ * 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.implementation.das;
+
+import java.io.InputStream;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.apache.tuscany.das.rdb.DAS;
+import org.osoa.sca.ServiceRuntimeException;
+
+/**
+ * The DataAccessEngineManager acts like a registry and factory for DAS instances
+ * It holds DAS by it's config file name, reusing the same DAS for all components 
+ * using the same config file.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class DataAccessEngineManager {
+
+    private final Map<String, DAS> registry = new HashMap<String, DAS>();
+
+    protected DAS initializeDAS(String config) {
+        //load the config file
+        System.out.println("Initializing DAS");
+        DAS das = DAS.FACTORY.createDAS(this.getConfigStream(config));
+        
+        return das;
+    }
+    
+    protected InputStream getConfigStream(String config) {
+        InputStream configStream = null;
+
+        try {
+            configStream = this.getClass().getResourceAsStream(config); 
+        } catch (Exception e) {
+            throw new ServiceRuntimeException(e); 
+        }
+        
+        return configStream;
+    }
+    
+    public DAS getDAS(String config) {
+        DAS das = registry.get(config);
+        if ( das == null) {
+            das = this.initializeDAS(config);
+            this.registry.put(config, das);
+        }
+        return das;
+    }
+    
+
+}