1 files changed, 147 insertions, 0 deletions
diff --git a/qpid/java/broker-core/src/main/java/org/apache/qpid/server/store/AbstractMemoryMessageStore.java b/qpid/java/broker-core/src/main/java/org/apache/qpid/server/store/AbstractMemoryMessageStore.java
new file mode 100644
index 0000000000..3abf083026
--- /dev/null
+++ b/qpid/java/broker-core/src/main/java/org/apache/qpid/server/store/AbstractMemoryMessageStore.java
@@ -0,0 +1,147 @@
+/*
+ *
+ * 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.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicLong;
+import org.apache.qpid.AMQStoreException;
+import org.apache.qpid.server.message.EnqueableMessage;
+import org.apache.qpid.server.model.VirtualHost;
+
+/** A simple message store that stores the messages in a thread-safe structure in memory. */
+abstract public class AbstractMemoryMessageStore extends NullMessageStore
+{
+    private final AtomicLong _messageId = new AtomicLong(1);
+    private final AtomicBoolean _closed = new AtomicBoolean(false);
+
+    private static final Transaction IN_MEMORY_TRANSACTION = new Transaction()
+    {
+        @Override
+        public StoreFuture commitTranAsync() throws AMQStoreException
+        {
+            return StoreFuture.IMMEDIATE_FUTURE;
+        }
+
+        @Override
+        public void enqueueMessage(TransactionLogResource queue, EnqueableMessage message) throws AMQStoreException
+        {
+        }
+
+        @Override
+        public void dequeueMessage(TransactionLogResource  queue, EnqueableMessage message) throws AMQStoreException
+        {
+        }
+
+        @Override
+        public void commitTran() throws AMQStoreException
+        {
+        }
+
+        @Override
+        public void abortTran() throws AMQStoreException
+        {
+        }
+
+        @Override
+        public void removeXid(long format, byte[] globalId, byte[] branchId)
+        {
+        }
+
+        @Override
+        public void recordXid(long format, byte[] globalId, byte[] branchId, Record[] enqueues, Record[] dequeues)
+        {
+        }
+    };
+
+    private final StateManager _stateManager;
+    private final EventManager _eventManager = new EventManager();
+
+    public AbstractMemoryMessageStore()
+    {
+        _stateManager = new StateManager(_eventManager);
+    }
+
+    @Override
+    public void configureConfigStore(VirtualHost virtualHost, ConfigurationRecoveryHandler recoveryHandler) throws Exception
+    {
+        _stateManager.attainState(State.INITIALISING);
+    }
+
+    @Override
+    public void configureMessageStore(VirtualHost virtualHost, MessageStoreRecoveryHandler recoveryHandler,
+                                      TransactionLogRecoveryHandler tlogRecoveryHandler) throws Exception
+    {
+        if(_stateManager.isInState(State.INITIAL))
+        {
+            _stateManager.attainState(State.INITIALISING);
+        }
+        _stateManager.attainState(State.INITIALISED);
+    }
+
+    @Override
+    public void activate() throws Exception
+    {
+
+        if(_stateManager.isInState(State.INITIALISING))
+        {
+            _stateManager.attainState(State.INITIALISED);
+        }
+        _stateManager.attainState(State.ACTIVATING);
+
+        _stateManager.attainState(State.ACTIVE);
+    }
+
+    @Override
+    public StoredMessage addMessage(StorableMessageMetaData metaData)
+    {
+        final long id = _messageId.getAndIncrement();
+        StoredMemoryMessage message = new StoredMemoryMessage(id, metaData);
+
+        return message;
+    }
+
+    @Override
+    public Transaction newTransaction()
+    {
+        return IN_MEMORY_TRANSACTION;
+    }
+
+    @Override
+    public boolean isPersistent()
+    {
+        return false;
+    }
+
+    @Override
+    public void close() throws Exception
+    {
+        _stateManager.attainState(State.CLOSING);
+        _closed.getAndSet(true);
+        _stateManager.attainState(State.CLOSED);
+    }
+
+    @Override
+    public void addEventListener(EventListener eventListener, Event... events)
+    {
+        _eventManager.addEventListener(eventListener, events);
+    }
+
+}