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: package org.apache.catalina.tribes.group;
18:
19: import java.io.Serializable;
20:
21: import org.apache.catalina.tribes.Member;
22:
23: /**
24: * The RpcCallback interface is an interface for the Tribes channel to request a
25: * response object to a request that came in.
26: * @author not attributable
27: * @version 1.0
28: */
29: public interface RpcCallback {
30:
31: /**
32: *
33: * @param msg Serializable
34: * @return Serializable - null if no reply should be sent
35: */
36: public Serializable replyRequest(Serializable msg, Member sender);
37:
38: /**
39: * If the reply has already been sent to the requesting thread,
40: * the rpc callback can handle any data that comes in after the fact.
41: * @param msg Serializable
42: * @param sender Member
43: */
44: public void leftOver(Serializable msg, Member sender);
45:
46: }
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