X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.db.common%2Fsrc%2Forg%2Fsimantics%2Fdb%2Fcommon%2Fprocedure%2Fadapter%2FTransientCacheAsyncListener.java;fp=bundles%2Forg.simantics.db.common%2Fsrc%2Forg%2Fsimantics%2Fdb%2Fcommon%2Fprocedure%2Fadapter%2FTransientCacheAsyncListener.java;h=3bb1f9a9485f9ab88d483db454b528dd8e48e955;hp=0000000000000000000000000000000000000000;hb=969bd23cab98a79ca9101af33334000879fb60c5;hpb=866dba5cd5a3929bbeae85991796acb212338a08

diff --git a/bundles/org.simantics.db.common/src/org/simantics/db/common/procedure/adapter/TransientCacheAsyncListener.java b/bundles/org.simantics.db.common/src/org/simantics/db/common/procedure/adapter/TransientCacheAsyncListener.java
new file mode 100644
index 000000000..3bb1f9a94
--- /dev/null
+++ b/bundles/org.simantics.db.common/src/org/simantics/db/common/procedure/adapter/TransientCacheAsyncListener.java
@@ -0,0 +1,54 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * 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:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.db.common.procedure.adapter;
+
+import org.simantics.db.AsyncReadGraph;
+import org.simantics.db.procedure.AsyncListener;
+
+/*
+ * Use this listener to ensure caching for a request. This listener will not lock the request in cache.
+ * 
+ */
+public class TransientCacheAsyncListener <T> implements AsyncListener<T> {
+
+    @SuppressWarnings("rawtypes")
+    private static TransientCacheAsyncListener INSTANCE = new TransientCacheAsyncListener();
+
+    @SuppressWarnings("unchecked")
+    public static <T> TransientCacheAsyncListener<T> instance() {
+        return (TransientCacheAsyncListener<T>) INSTANCE;
+    }
+
+    @Override
+    public void exception(AsyncReadGraph graph, Throwable t) {
+    }
+
+    @Override
+    public void execute(AsyncReadGraph graph, T result) {
+    }
+
+    @Override
+    public final boolean isDisposed() {
+        return true;
+    }
+
+    @Override
+    public int hashCode() {
+        return TransientCacheAsyncListener.class.hashCode();
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        return other instanceof TransientCacheAsyncListener;
+    }
+
+}
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