svn commit: r690100 - in /servicemix/utils/trunk/src/main/java/org/apache/servicemix/store: TimeoutMemoryStore.java memory/TimeoutMemoryStore.java

[ge...@apache.org]

Author: gertv
Date: Thu Aug 28 22:02:28 2008
New Revision: 690100

URL: http://svn.apache.org/viewvc?rev=690100&view=rev
Log:
Moving TimeoutMemoryStore to the correct package directory

Added:
    servicemix/utils/trunk/src/main/java/org/apache/servicemix/store/memory/TimeoutMemoryStore.java
Removed:
    servicemix/utils/trunk/src/main/java/org/apache/servicemix/store/TimeoutMemoryStore.java

Added: servicemix/utils/trunk/src/main/java/org/apache/servicemix/store/memory/TimeoutMemoryStore.java
URL: http://svn.apache.org/viewvc/servicemix/utils/trunk/src/main/java/org/apache/servicemix/store/memory/TimeoutMemoryStore.java?rev=690100&view=auto
==============================================================================
--- servicemix/utils/trunk/src/main/java/org/apache/servicemix/store/memory/TimeoutMemoryStore.java (added)
+++ servicemix/utils/trunk/src/main/java/org/apache/servicemix/store/memory/TimeoutMemoryStore.java Thu Aug 28 22:02:28 2008
@@ -0,0 +1,85 @@
+/*
+ * 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.servicemix.store.memory;
+
+import java.io.IOException;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.servicemix.id.IdGenerator;
+
+/**
+ * {@link MemoryStore} which removes entries from the store after the specified timeout
+ * to free memory.
+ */
+public class TimeoutMemoryStore extends MemoryStore {
+
+    private static final Log LOG = LogFactory.getLog(TimeoutMemoryStore.class);
+    private ConcurrentMap<String, Entry> datas = new ConcurrentHashMap<String, Entry>();
+    private final long timeout;
+
+    protected TimeoutMemoryStore(IdGenerator idGenerator, long timeout) {
+        super(idGenerator);
+        this.timeout = timeout;
+    }
+    
+    /**
+     * {@inheritDoc}
+     */
+    public void store(String id, Object data) throws IOException {
+        LOG.debug("Storing object with id: " + id);
+        datas.put(id, new Entry(data));
+    }
+    
+    /**
+     * {@inheritDoc}
+     * 
+     * Before attempting to load the object, all data older than the specified timeout will first be 
+     * removed from the store.
+     */
+    public Object load(String id) throws IOException {
+        evict();
+        LOG.debug("Loading object with id:" + id);
+        Entry entry = datas.remove(id);
+        return entry == null ? null : entry.data;
+    }
+    
+    private void evict() {
+        long now = System.currentTimeMillis();
+        for (String key : datas.keySet()) {
+            long age = now - datas.get(key).time;
+            if (age > timeout) {
+                LOG.debug("Removing object with id " + key + " from store after " + age + " ms");
+                datas.remove(key);
+            }
+        }
+    }
+
+    /*
+     * A single store entry
+     */
+    private final class Entry {
+        private final long time = System.currentTimeMillis();
+        private final Object data;
+        
+        private Entry(Object data) {
+            this.data = data;
+        }
+    }
+}