]> gerrit.simantics Code Review - simantics/platform.git/blob - bundles/org.simantics.db.common/src/org/simantics/db/common/procedure/adapter/TransientCacheAsyncMultiListener.java
Fixed multiple issues causing dangling references to discarded queries
[simantics/platform.git] / bundles / org.simantics.db.common / src / org / simantics / db / common / procedure / adapter / TransientCacheAsyncMultiListener.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.AsyncMultiListener;
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 TransientCacheAsyncMultiListener <T> implements AsyncMultiListener<T> {
22
23     @SuppressWarnings("rawtypes")
24     private static TransientCacheAsyncMultiListener INSTANCE = new TransientCacheAsyncMultiListener();
25
26     @SuppressWarnings("unchecked")
27     public static <T> TransientCacheAsyncMultiListener<T> instance() {
28         return (TransientCacheAsyncMultiListener<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 void finished(AsyncReadGraph graph) {
41     }
42
43     @Override
44     public final boolean isDisposed() {
45         return true;
46     }
47
48     @Override
49     public int hashCode() {
50         return TransientCacheAsyncMultiListener.class.hashCode();
51     }
52
53     @Override
54     public boolean equals(Object other) {
55         return other instanceof TransientCacheAsyncMultiListener;
56     }
57
58 }