1 files changed, 184 insertions, 0 deletions
diff --git a/qpid/java/broker/src/main/java/org/apache/qpid/server/configuration/ConfigStore.java b/qpid/java/broker/src/main/java/org/apache/qpid/server/configuration/ConfigStore.java
new file mode 100644
index 0000000000..0e03e33be8
--- /dev/null
+++ b/qpid/java/broker/src/main/java/org/apache/qpid/server/configuration/ConfigStore.java
@@ -0,0 +1,184 @@
+/*
+ *
+ * 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.configuration;
+
+import java.util.UUID;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.concurrent.atomic.AtomicReference;
+
+public class ConfigStore
+{
+    private ConcurrentHashMap<ConfigObjectType, ConcurrentHashMap<UUID, ConfiguredObject>> _typeMap =
+            new ConcurrentHashMap<ConfigObjectType, ConcurrentHashMap<UUID, ConfiguredObject>>();
+
+    private ConcurrentHashMap<ConfigObjectType, CopyOnWriteArrayList<ConfigEventListener>> _listenerMap =
+            new ConcurrentHashMap<ConfigObjectType, CopyOnWriteArrayList<ConfigEventListener>>();
+
+    private AtomicReference<SystemConfig> _root = new AtomicReference<SystemConfig>(null);
+
+    private final AtomicLong _objectIdSource = new AtomicLong(0l);
+
+
+    public enum Event
+    {
+        CREATED, DELETED
+    }
+
+    public interface ConfigEventListener<T extends ConfigObjectType<T,C>, C extends ConfiguredObject<T, C>>
+    {
+        void onEvent(C object, Event evt);
+    }
+
+    private ConfigStore()
+    {
+    }
+
+    public <T extends ConfigObjectType<T, C>, C extends ConfiguredObject<T, C>> ConfiguredObject<T, C> getConfiguredObject(ConfigObjectType<T,C> type, UUID id)
+    {
+        ConcurrentHashMap<UUID, ConfiguredObject> typeMap = _typeMap.get(type);
+        if(typeMap != null)
+        {
+            return typeMap.get(id);
+        }
+        else
+        {
+            return null;
+        }
+
+    }
+
+    public <T extends ConfigObjectType<T, C>, C extends ConfiguredObject<T, C>> Collection<? extends C> getConfiguredObjects(ConfigObjectType<T,C> type)
+    {
+        ConcurrentHashMap typeMap = _typeMap.get(type);
+        if(typeMap != null)
+        {
+            return typeMap.values();
+        }
+        else
+        {
+            return Collections.EMPTY_LIST;
+        }
+
+    }
+
+    public <T extends ConfigObjectType<T, C>, C extends ConfiguredObject<T, C>> void addConfiguredObject(ConfiguredObject<T, C> object)
+    {
+        ConcurrentHashMap typeMap = _typeMap.get(object.getConfigType());
+        if(typeMap == null)
+        {
+            typeMap = new ConcurrentHashMap();
+            ConcurrentHashMap oldMap = _typeMap.putIfAbsent(object.getConfigType(), typeMap);
+            if(oldMap != null)
+            {
+                typeMap = oldMap;
+            }
+
+        }
+
+        typeMap.put(object.getId(), object);
+        sendEvent(Event.CREATED, object);
+    }
+
+
+    public <T extends ConfigObjectType<T, C>, C extends ConfiguredObject<T, C>> void removeConfiguredObject(ConfiguredObject<T, C> object)
+    {
+        ConcurrentHashMap typeMap = _typeMap.get(object.getConfigType());
+        if(typeMap != null)
+        {
+            typeMap.remove(object.getId());
+            sendEvent(Event.DELETED, object);
+        }
+    }
+
+    public <T extends ConfigObjectType<T, C>, C extends ConfiguredObject<T, C>> void addConfigEventListener(T type, ConfigEventListener<T,C> listener)
+    {
+        CopyOnWriteArrayList listeners = _listenerMap.get(type);
+        if(listeners == null)
+        {
+            listeners = new CopyOnWriteArrayList();
+            CopyOnWriteArrayList oldListeners = _listenerMap.putIfAbsent(type, listeners);
+            if(oldListeners != null)
+            {
+                listeners = oldListeners;
+            }
+
+        }
+
+        listeners.add(listener);
+
+    }
+
+    public <T extends ConfigObjectType<T, C>, C extends ConfiguredObject<T, C>> void removeConfigEventListener(T type, ConfigEventListener<T,C> listener)
+    {
+        CopyOnWriteArrayList listeners = _listenerMap.get(type);
+        if(listeners != null)
+        {
+            listeners.remove(listener);
+        }
+    }
+
+    private void sendEvent(Event e, ConfiguredObject o)
+    {
+        CopyOnWriteArrayList<ConfigEventListener> listeners = _listenerMap.get(o.getConfigType());
+        if(listeners != null)
+        {
+            for(ConfigEventListener listener : listeners)
+            {
+                listener.onEvent(o, e);
+            }
+        }
+    }
+
+    public boolean setRoot(SystemConfig object)
+    {
+        if(_root.compareAndSet(null,object))
+        {
+            addConfiguredObject(object);
+            return true;
+        }
+        else
+        {
+            return false;
+        }
+    }
+
+    public UUID createId()
+    {
+        return new UUID(0l, _objectIdSource.getAndIncrement());
+    }
+
+
+    public SystemConfig getRoot()
+    {
+        return _root.get();
+    }
+
+    public static ConfigStore newInstance()
+    {
+        return new ConfigStore();
+    }
+
+}