--- /dev/null
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ * VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.db.common.procedure.adapter;\r
+\r
+import org.simantics.db.AsyncReadGraph;\r
+import org.simantics.db.procedure.AsyncListener;\r
+\r
+/*\r
+ * Use this listener to ensure caching for a request. This listener will not lock the request in cache.\r
+ * \r
+ */\r
+public class TransientCacheAsyncListener <T> implements AsyncListener<T> {\r
+\r
+ @SuppressWarnings("rawtypes")\r
+ private static TransientCacheAsyncListener INSTANCE = new TransientCacheAsyncListener();\r
+\r
+ @SuppressWarnings("unchecked")\r
+ public static <T> TransientCacheAsyncListener<T> instance() {\r
+ return (TransientCacheAsyncListener<T>) INSTANCE;\r
+ }\r
+\r
+ @Override\r
+ public void exception(AsyncReadGraph graph, Throwable t) {\r
+ }\r
+\r
+ @Override\r
+ public void execute(AsyncReadGraph graph, T result) {\r
+ }\r
+\r
+ @Override\r
+ public final boolean isDisposed() {\r
+ return true;\r
+ }\r
+\r
+ @Override\r
+ public int hashCode() {\r
+ return TransientCacheAsyncListener.class.hashCode();\r
+ }\r
+\r
+ @Override\r
+ public boolean equals(Object other) {\r
+ return other instanceof TransientCacheAsyncListener;\r
+ }\r
+\r
+}
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