]> gerrit.simantics Code Review - simantics/platform.git/blob - bundles/org.simantics.db.common/src/org/simantics/db/common/procedure/adapter/TransientCacheAsyncListener.java
Add logging by default to adapters exception-methods
[simantics/platform.git] / bundles / org.simantics.db.common / src / org / simantics / db / common / procedure / adapter / TransientCacheAsyncListener.java
1 /*******************************************************************************
2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
3  * in Industry THTH ry.
4  * All rights reserved. This program and the accompanying materials
5  * are made available under the terms of the Eclipse Public License v1.0
6  * which accompanies this distribution, and is available at
7  * http://www.eclipse.org/legal/epl-v10.html
8  *
9  * Contributors:
10  *     VTT Technical Research Centre of Finland - initial API and implementation
11  *******************************************************************************/
12 package org.simantics.db.common.procedure.adapter;
13
14 import org.simantics.db.AsyncReadGraph;
15 import org.simantics.db.procedure.AsyncListener;
16
17 /*
18  * Use this listener to ensure caching for a request. This listener will not lock the request in cache.
19  * 
20  */
21 public class TransientCacheAsyncListener <T> implements AsyncListener<T> {
22
23     @SuppressWarnings("rawtypes")
24     private static TransientCacheAsyncListener INSTANCE = new TransientCacheAsyncListener();
25
26     @SuppressWarnings("unchecked")
27     public static <T> TransientCacheAsyncListener<T> instance() {
28         return (TransientCacheAsyncListener<T>) INSTANCE;
29     }
30
31     @Override
32     public void exception(AsyncReadGraph graph, Throwable t) {
33     }
34
35     @Override
36     public void execute(AsyncReadGraph graph, T result) {
37     }
38
39     @Override
40     public final boolean isDisposed() {
41         return true;
42     }
43
44     @Override
45     public int hashCode() {
46         return TransientCacheAsyncListener.class.hashCode();
47     }
48
49     @Override
50     public boolean equals(Object other) {
51         return other instanceof TransientCacheAsyncListener;
52     }
53
54 }