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1   /*
2    * Copyright 2010 The Apache Software Foundation
3    *
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *     http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing, software
15   * distributed under the License is distributed on an "AS IS" BASIS,
16   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17   * See the License for the specific language governing permissions and
18   * limitations under the License.
19   */
20  
21  package org.apache.hadoop.hbase.rest;
22  
23  import java.io.IOException;
24  
25  import javax.ws.rs.GET;
26  import javax.ws.rs.Path;
27  import javax.ws.rs.PathParam;
28  import javax.ws.rs.Produces;
29  import javax.ws.rs.core.CacheControl;
30  import javax.ws.rs.core.Context;
31  import javax.ws.rs.core.Response;
32  import javax.ws.rs.core.UriInfo;
33  import javax.ws.rs.core.Response.ResponseBuilder;
34  
35  import org.apache.commons.logging.Log;
36  import org.apache.commons.logging.LogFactory;
37  
38  import org.apache.hadoop.hbase.rest.model.TableListModel;
39  import org.apache.hadoop.hbase.rest.model.TableModel;
40  
41  @Path("/")
42  public class RootResource extends ResourceBase {
43    private static final Log LOG = LogFactory.getLog(RootResource.class);
44  
45    static CacheControl cacheControl;
46    static {
47      cacheControl = new CacheControl();
48      cacheControl.setNoCache(true);
49      cacheControl.setNoTransform(false);
50    }
51  
52    /**
53     * Constructor
54     * @throws IOException
55     */
56    public RootResource() throws IOException {
57      super();
58    }
59  
60    private final TableListModel getTableList() throws IOException {
61      TableListModel tableList = new TableListModel();
62      String[] tableNames = servlet.getAdmin().getTableNames();
63      for (String name: tableNames) {
64        tableList.add(new TableModel(name));
65      }
66      return tableList;
67    }
68  
69    @GET
70    @Produces({MIMETYPE_TEXT, MIMETYPE_XML, MIMETYPE_JSON, MIMETYPE_PROTOBUF,
71      MIMETYPE_PROTOBUF_IETF})
72    public Response get(final @Context UriInfo uriInfo) {
73      if (LOG.isDebugEnabled()) {
74        LOG.debug("GET " + uriInfo.getAbsolutePath());
75      }
76      servlet.getMetrics().incrementRequests(1);
77      try {
78        ResponseBuilder response = Response.ok(getTableList());
79        response.cacheControl(cacheControl);
80        servlet.getMetrics().incrementSucessfulGetRequests(1);
81        return response.build();
82      } catch (IOException e) {
83        servlet.getMetrics().incrementFailedGetRequests(1);
84        return Response.status(Response.Status.SERVICE_UNAVAILABLE)
85          .type(MIMETYPE_TEXT).entity("Unavailable" + CRLF)
86          .build();
87      }
88    }
89  
90    @Path("status/cluster")
91    public StorageClusterStatusResource getClusterStatusResource()
92        throws IOException {
93      return new StorageClusterStatusResource();
94    }
95  
96    @Path("version")
97    public VersionResource getVersionResource() throws IOException {
98      return new VersionResource();
99    }
100 
101   @Path("{table}")
102   public TableResource getTableResource(
103       final @PathParam("table") String table) throws IOException {
104     return new TableResource(table);
105   }
106 }