01: /**
02: * Licensed to the Apache Software Foundation (ASF) under one
03: * or more contributor license agreements. See the NOTICE file
04: * distributed with this work for additional information
05: * regarding copyright ownership. The ASF licenses this file
06: * to you under the Apache License, Version 2.0 (the
07: * "License"); you may not use this file except in compliance
08: * with the License. You may obtain a copy of the License at
09: *
10: * http://www.apache.org/licenses/LICENSE-2.0
11: *
12: * Unless required by applicable law or agreed to in writing,
13: * software distributed under the License is distributed on an
14: * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15: * KIND, either express or implied. See the License for the
16: * specific language governing permissions and limitations
17: * under the License.
18: */package org.apache.cxf.clustering;
19:
20: import java.util.List;
21:
22: import org.apache.cxf.endpoint.Endpoint;
23: import org.apache.cxf.message.Exchange;
24:
25: /**
26: * Supports pluggable strategies for alternate endpoint selection on
27: * failover.
28: */
29: public interface FailoverStrategy {
30: /**
31: * Get the alternate endpoints for this invocation.
32: *
33: * @param exchange the current Exchange
34: * @return a failover endpoint if one is available
35: */
36: List<Endpoint> getAlternateEndpoints(Exchange exchange);
37:
38: /**
39: * Select one of the alternate endpoints for a retried invocation.
40: *
41: * @param alternates List of alternate endpoints if available
42: * @return the selected endpoint
43: */
44: Endpoint selectAlternateEndpoint(List<Endpoint> alternates);
45: }
|