View Javadoc

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.HTableDescriptor;
39  import org.apache.hadoop.hbase.rest.model.TableListModel;
40  import org.apache.hadoop.hbase.rest.model.TableModel;
41  
42  @Path("/")
43  public class RootResource extends ResourceBase {
44    private static final Log LOG = LogFactory.getLog(RootResource.class);
45  
46    static CacheControl cacheControl;
47    static {
48      cacheControl = new CacheControl();
49      cacheControl.setNoCache(true);
50      cacheControl.setNoTransform(false);
51    }
52  
53    /**
54     * Constructor
55     * @throws IOException
56     */
57    public RootResource() throws IOException {
58      super();
59    }
60  
61    private final TableListModel getTableList() throws IOException {
62      TableListModel tableList = new TableListModel();
63      HTableDescriptor[] list = servlet.getAdmin().listTables();
64      for (HTableDescriptor htd: list) {
65        tableList.add(new TableModel(htd.getNameAsString()));
66      }
67      return tableList;
68    }
69  
70    @GET
71    @Produces({MIMETYPE_TEXT, MIMETYPE_XML, MIMETYPE_JSON, MIMETYPE_PROTOBUF,
72      MIMETYPE_PROTOBUF_IETF})
73    public Response get(final @Context UriInfo uriInfo) {
74      if (LOG.isDebugEnabled()) {
75        LOG.debug("GET " + uriInfo.getAbsolutePath());
76      }
77      servlet.getMetrics().incrementRequests(1);
78      try {
79        ResponseBuilder response = Response.ok(getTableList());
80        response.cacheControl(cacheControl);
81        servlet.getMetrics().incrementSucessfulGetRequests(1);
82        return response.build();
83      } catch (IOException e) {
84        servlet.getMetrics().incrementFailedGetRequests(1);
85        return Response.status(Response.Status.SERVICE_UNAVAILABLE)
86          .type(MIMETYPE_TEXT).entity("Unavailable" + CRLF)
87          .build();
88      }
89    }
90  
91    @Path("status/cluster")
92    public StorageClusterStatusResource getClusterStatusResource()
93        throws IOException {
94      return new StorageClusterStatusResource();
95    }
96  
97    @Path("version")
98    public VersionResource getVersionResource() throws IOException {
99      return new VersionResource();
100   }
101 
102   @Path("{table}")
103   public TableResource getTableResource(
104       final @PathParam("table") String table) throws IOException {
105     return new TableResource(table);
106   }
107 }