1 files changed, 166 insertions, 0 deletions
diff --git a/qpid/java/broker/src/main/java/org/apache/qpid/server/queue/FileQueueBackingStoreFactory.java b/qpid/java/broker/src/main/java/org/apache/qpid/server/queue/FileQueueBackingStoreFactory.java
new file mode 100644
index 0000000000..21073c22ae
--- /dev/null
+++ b/qpid/java/broker/src/main/java/org/apache/qpid/server/queue/FileQueueBackingStoreFactory.java
@@ -0,0 +1,166 @@
+/*
+ *
+ * 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.queue;
+
+import org.apache.commons.configuration.ConfigurationException;
+import org.apache.log4j.Logger;
+import org.apache.qpid.server.configuration.VirtualHostConfiguration;
+import org.apache.qpid.server.virtualhost.VirtualHost;
+import org.apache.qpid.util.FileUtils;
+
+import java.io.File;
+
+public class FileQueueBackingStoreFactory implements QueueBackingStoreFactory
+{
+    private static final Logger _log = Logger.getLogger(FileQueueBackingStoreFactory.class);
+
+    private String _flowToDiskLocation;
+    private static final String QUEUE_BACKING_DIR = "queueBacking";
+
+    public void configure(VirtualHost virtualHost, VirtualHostConfiguration config) throws ConfigurationException
+    {
+        setFlowToDisk(virtualHost.getName(), config.getFlowToDiskLocation());
+    }
+
+    private void setFlowToDisk(String vHostName, String location) throws ConfigurationException
+    {
+        if (vHostName == null)
+        {
+            throw new ConfigurationException("Unable to setup to Flow to Disk as Virtualhost name was not specified");
+        }
+
+        if (location == null)
+        {
+            throw new ConfigurationException("Unable to setup to Flow to Disk as location was not specified.");
+        }
+
+        _flowToDiskLocation = location;
+
+        _flowToDiskLocation += File.separator + QUEUE_BACKING_DIR + File.separator + vHostName;
+
+        //Check the location we will create QUEUE_BACKING_DIR in.
+        File root = new File(location);
+        if (!root.exists())
+        {
+            throw new ConfigurationException("Specified Flow to Disk root does not exist:" + root.getAbsolutePath());
+        }
+        else
+        {
+
+            if (root.isFile())
+            {
+                throw new ConfigurationException("Unable to create Temporary Flow to Disk store as specified root is a file:" +
+                                                 root.getAbsolutePath());
+            }
+
+            if (!root.canWrite())
+            {
+                throw new ConfigurationException("Unable to create Temporary Flow to Disk store. Unable to write to specified root:" +
+                                                 root.getAbsolutePath());
+            }
+
+        }
+        
+        // if we don't mark QUEUE_BAKCING_DIR as a deleteOnExit it will remain.        
+        File backingDir = new File(location + File.separator + QUEUE_BACKING_DIR);
+        if (backingDir.exists())
+        {
+            if (!FileUtils.delete(backingDir, true))
+            {
+                throw new ConfigurationException("Unable to delete existing Flow to Disk root at:"
+                                                 + backingDir.getAbsolutePath());
+            }
+
+            if (backingDir.isFile())
+            {
+                throw new ConfigurationException("Unable to create Temporary Flow to Disk root as specified location is a file:" +
+                                                 backingDir.getAbsolutePath());
+            }
+        }
+        
+        backingDir.deleteOnExit();
+        if (!backingDir.mkdirs())
+        {
+            throw new ConfigurationException("Unable to create Temporary Flow to Disk root:" + location + File.separator + QUEUE_BACKING_DIR);
+        }
+
+
+        File store = new File(_flowToDiskLocation);
+        if (store.exists())
+        {
+            if (!FileUtils.delete(store, true))
+            {
+                throw new ConfigurationException("Unable to delete existing Flow to Disk store at:"
+                                                 + store.getAbsolutePath());
+            }
+
+            if (store.isFile())
+            {
+                throw new ConfigurationException("Unable to create Temporary Flow to Disk store as specified location is a file:" +
+                                                 store.getAbsolutePath());
+            }
+
+        }
+
+        _log.info("Creating Flow to Disk Store : " + store.getAbsolutePath());
+        store.deleteOnExit();
+        if (!store.mkdir())
+        {
+            throw new ConfigurationException("Unable to create Temporary Flow to Disk store:" + store.getAbsolutePath());
+        }
+    }
+
+    public QueueBackingStore createBacking(AMQQueue queue)
+    {
+        return new FileQueueBackingStore(createStore(queue.getName().toString()));
+    }
+
+    private String createStore(String name)
+    {
+        return createStore(name, 0);
+    }
+
+    private String createStore(String name, int index)
+    {
+
+        String store = _flowToDiskLocation + File.separator + name;
+        if (index > 0)
+        {
+            store += "-" + index;
+        }
+
+        //TODO ensure store is safe for the OS
+
+        File storeFile = new File(store);
+
+        if (storeFile.exists())
+        {
+            return createStore(name, index + 1);
+        }
+
+        storeFile.mkdirs();
+
+        storeFile.deleteOnExit();
+
+        return store;
+    }
+
+}