--- /dev/null
+/*******************************************************************************
+ * Copyright (c) 2010, 2014 Sonatype, Inc.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * Sonatype, Inc. - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.aether;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * A simplistic repository cache backed by a thread-safe map. The simplistic nature of this cache makes it only suitable
+ * for use with short-lived repository system sessions where pruning of cache data is not required.
+ */
+public final class DefaultRepositoryCache
+ implements RepositoryCache
+{
+
+ private final Map<Object, Object> cache = new ConcurrentHashMap<Object, Object>( 256 );
+
+ public Object get( RepositorySystemSession session, Object key )
+ {
+ return cache.get( key );
+ }
+
+ public void put( RepositorySystemSession session, Object key, Object data )
+ {
+ if ( data != null )
+ {
+ cache.put( key, data );
+ }
+ else
+ {
+ cache.remove( key );
+ }
+ }
+
+}