01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: *
17: */
18: package org.apache.lenya.inbox;
19:
20: import java.util.HashMap;
21: import java.util.Map;
22:
23: import org.apache.avalon.framework.logger.AbstractLogEnabled;
24: import org.apache.avalon.framework.thread.ThreadSafe;
25: import org.apache.lenya.ac.User;
26:
27: /**
28: * Abstract base class for inbox managers.
29: */
30: public abstract class AbstractInboxManager extends AbstractLogEnabled
31: implements InboxManager, ThreadSafe {
32:
33: private Map inboxes = new HashMap();
34:
35: public synchronized Inbox getInbox(User user) {
36: Inbox inbox = (Inbox) this .inboxes.get(user);
37: if (inbox == null) {
38: inbox = doGetInbox(user);
39: this .inboxes.put(user, inbox);
40: }
41: return inbox;
42: }
43:
44: protected abstract Inbox doGetInbox(User user);
45:
46: }
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