01: /*
02: * Copyright 2004-2007 the original author or authors.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS,
12: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13: * See the License for the specific language governing permissions and
14: * limitations under the License.
15: */
16: package org.springframework.webflow.core.collection;
17:
18: /**
19: * An interface to be implemented by mutable attribute maps accessed by
20: * multiple threads that need to be synchronized.
21: *
22: * @author Keith Donald
23: */
24: public interface SharedAttributeMap extends MutableAttributeMap {
25:
26: /**
27: * Returns the shared map's mutex, which may be synchronized on to block
28: * access to the map by other threads.
29: */
30: public Object getMutex();
31: }
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