1 /**
2  * Licensed to the Apache Software Foundation (ASF) under one
3  * or more contributor license agreements.  See the NOTICE file
4  * distributed with this work for additional information
5  * regarding copyright ownership.  The ASF licenses this file
6  * to you under the Apache License, Version 2.0 (the
7  * "License"); you may not use this file except in compliance
8  * with the License.  You may obtain a copy of the License at
9  *
10  *     http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  */
18 
19 package org.apache.zookeeper.server.jersey.resources;
20 
21 import javax.ws.rs.core.Context;
22 import javax.ws.rs.core.Response;
23 import javax.ws.rs.core.UriInfo;
24 import javax.ws.rs.ext.ExceptionMapper;
25 import javax.ws.rs.ext.Provider;
26 
27 import org.apache.zookeeper.KeeperException;
28 import org.apache.zookeeper.server.jersey.jaxb.ZError;
29 
30 
31 /**
32  * Map KeeperException to HTTP status codes
33  */
34 @Provider
35 public class KeeperExceptionMapper implements ExceptionMapper<KeeperException> {
36     private UriInfo ui;
37 
KeeperExceptionMapper(@ontext UriInfo ui)38     public KeeperExceptionMapper(@Context UriInfo ui) {
39         this.ui = ui;
40     }
41 
toResponse(KeeperException e)42     public Response toResponse(KeeperException e) {
43         Response.Status status;
44         String message;
45 
46         String path = e.getPath();
47 
48         switch(e.code()) {
49         case AUTHFAILED:
50             status = Response.Status.UNAUTHORIZED;
51             message = path + " not authorized";
52             break;
53         case BADARGUMENTS:
54             status = Response.Status.BAD_REQUEST;
55             message = path + " bad arguments";
56             break;
57         case BADVERSION:
58             status = Response.Status.PRECONDITION_FAILED;
59             message = path + " bad version";
60             break;
61         case INVALIDACL:
62             status = Response.Status.BAD_REQUEST;
63             message = path + " invalid acl";
64             break;
65         case NODEEXISTS:
66             status = Response.Status.CONFLICT;
67             message = path + " already exists";
68             break;
69         case NONODE:
70             status = Response.Status.NOT_FOUND;
71             message = path + " not found";
72             break;
73         case NOTEMPTY:
74             status = Response.Status.CONFLICT;
75             message = path + " not empty";
76             break;
77         default:
78             status = Response.Status.fromStatusCode(502); // bad gateway
79             message = "Error processing request for " + path
80                 + " : " + e.getMessage();
81         }
82 
83         return Response.status(status).entity(
84                 new ZError(ui.getRequestUri().toString(), message)).build();
85     }
86 }
87