01: // Copyright 2006, 2007 The Apache Software Foundation
02: //
03: // Licensed under the Apache License, Version 2.0 (the "License");
04: // you may not use this file except in compliance with the License.
05: // You may obtain a copy of the License at
06: //
07: // http://www.apache.org/licenses/LICENSE-2.0
08: //
09: // Unless required by applicable law or agreed to in writing, software
10: // distributed under the License is distributed on an "AS IS" BASIS,
11: // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12: // See the License for the specific language governing permissions and
13: // limitations under the License.
14:
15: package org.apache.tapestry.ioc.services;
16:
17: /**
18: * Event hub used to identify when the end of thread cleanup (i.e., end of request cleanup in a
19: * typical web application) should occur. Tapestry IoC has any number of objects that need to know
20: * when this event occurs, so that they can clean up any per-thread/per-request state.
21: */
22: public interface ThreadCleanupHub {
23: /**
24: * Adds a listener to the hub. The hub maintains a seperate list of listeners for each thread
25: * (i.e., using a ThreadLocal). Further, the listener list is discarded at the end of the
26: * request.
27: *
28: * @param listener
29: * to add
30: */
31: void addThreadCleanupListener(ThreadCleanupListener listener);
32:
33: /**
34: * Immediately performs a cleanup of the thread, notifying all listeners.
35: */
36: void cleanup();
37: }
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