1 files changed, 66 insertions, 0 deletions
diff --git a/java/broker/src/main/java/org/apache/qpid/server/store/MessageStoreCreator.java b/java/broker/src/main/java/org/apache/qpid/server/store/MessageStoreCreator.java
new file mode 100644
index 0000000000..0d5a4850f6
--- /dev/null
+++ b/java/broker/src/main/java/org/apache/qpid/server/store/MessageStoreCreator.java
@@ -0,0 +1,66 @@
+/*
+ *
+ * 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.qpid.server.store;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.apache.qpid.server.configuration.IllegalConfigurationException;
+import org.apache.qpid.server.plugin.QpidServiceLoader;
+
+public class MessageStoreCreator
+{
+    private Map<String, MessageStoreFactory> _factories = new HashMap<String, MessageStoreFactory>();
+
+    public MessageStoreCreator()
+    {
+        QpidServiceLoader<MessageStoreFactory> qpidServiceLoader = new QpidServiceLoader<MessageStoreFactory>();
+        Iterable<MessageStoreFactory> factories = qpidServiceLoader.atLeastOneInstanceOf(MessageStoreFactory.class);
+        for (MessageStoreFactory messageStoreFactory : factories)
+        {
+            String type = messageStoreFactory.getType();
+            MessageStoreFactory factory = _factories.put(type.toLowerCase(), messageStoreFactory);
+            if (factory != null)
+            {
+                throw new IllegalStateException("MessageStoreFactory with type name '" + type
+                        + "' is already registered using class '" + factory.getClass().getName() + "', can not register class '"
+                        + messageStoreFactory.getClass().getName() + "'");
+            }
+        }
+    }
+
+    public MessageStore createMessageStore(String storeType)
+    {
+        MessageStoreFactory factory = _factories.get(storeType.toLowerCase());
+        if (factory == null)
+        {
+            throw new IllegalConfigurationException("Unknown store type: " + storeType);
+        }
+        return factory.createMessageStore();
+    }
+
+    public Collection<MessageStoreFactory> getFactories()
+    {
+        return Collections.unmodifiableCollection(_factories.values());
+    }
+}