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Java > Open Source Codes > org > apache > servicemix > jbi > resolver > EndpointResolver


1 /*
2  * Licensed to the Apache Software Foundation (ASF) under one or more
3  * contributor license agreements. See the NOTICE file distributed with
4  * this work for additional information regarding copyright ownership.
5  * The ASF licenses this file to You under the Apache License, Version 2.0
6  * (the "License"); you may not use this file except in compliance with
7  * the License. You may obtain a copy of the License at
8  *
9  * 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.servicemix.jbi.resolver;
18
19 import javax.jbi.JBIException;
20 import javax.jbi.component.ComponentContext;
21 import javax.jbi.messaging.MessageExchange;
22 import javax.jbi.servicedesc.ServiceEndpoint;
23
24 /**
25  * A Strategy pattern which can be used to plug in different {@link ServiceEndpoint} resolving policies from static
26  * relationships to dynamic resolution of the endpoint used based on some policy.
27  *
28  * @version $Revision: 426415 $
29  */
30 public interface EndpointResolver {
31
32     /**
33      * Resolves the endpoint which should be used for the given message exchange
34      * using either a hard coded endpoint or some policy which chooses the endpoint
35      * dynamically using some algorithm.
36      *
37      * @param context is the component context
38      * @param exchange the message exchange which the endpoint will be used for which may
39      * contain some state to help choose the algorithm.
40      * @param filter the filter to be applied to the available endpoints
41      * @return the chosen endpoint or null if no endpoint could be found.
42      */
43     ServiceEndpoint resolveEndpoint(ComponentContext context, MessageExchange exchange, EndpointFilter filter) throws JBIException;
44
45     /**
46      * Resolves all the available endpoints which may not be applicable to a component.
47      */
48     ServiceEndpoint[] resolveAvailableEndpoints(ComponentContext context, MessageExchange exchange) throws JBIException;
49 }
50
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