1 /*
2  *
3  * Licensed to the Apache Software Foundation (ASF) under one
4  * or more contributor license agreements.  See the NOTICE file
5  * distributed with this work for additional information
6  * regarding copyright ownership.  The ASF licenses this file
7  * to you under the Apache License, Version 2.0 (the
8  * "License"); you may not use this file except in compliance
9  * with the License.  You may obtain a copy of the License at
10  *
11  *     http://www.apache.org/licenses/LICENSE-2.0
12  *
13  * Unless required by applicable law or agreed to in writing, software
14  * distributed under the License is distributed on an "AS IS" BASIS,
15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16  * See the License for the specific language governing permissions and
17  * limitations under the License.
18  */
19 
20 package org.apache.hadoop.hbase.rest;
21 
22 import java.io.IOException;
23 
24 import javax.ws.rs.GET;
25 import javax.ws.rs.Path;
26 import javax.ws.rs.PathParam;
27 import javax.ws.rs.Produces;
28 import javax.ws.rs.core.CacheControl;
29 import javax.ws.rs.core.Context;
30 import javax.ws.rs.core.Response;
31 import javax.ws.rs.core.UriInfo;
32 import javax.ws.rs.core.Response.ResponseBuilder;
33 
34 import org.apache.commons.logging.Log;
35 import org.apache.commons.logging.LogFactory;
36 
37 import org.apache.hadoop.hbase.classification.InterfaceAudience;
38 import org.apache.hadoop.hbase.TableName;
39 import org.apache.hadoop.hbase.rest.model.TableListModel;
40 import org.apache.hadoop.hbase.rest.model.TableModel;
41 
42 @Path("/")
43 @InterfaceAudience.Private
44 public class RootResource extends ResourceBase {
45   private static final Log LOG = LogFactory.getLog(RootResource.class);
46 
47   static CacheControl cacheControl;
48   static {
49     cacheControl = new CacheControl();
50     cacheControl.setNoCache(true);
51     cacheControl.setNoTransform(false);
52   }
53 
54   /**
55    * Constructor
56    * @throws IOException
57    */
RootResource()58   public RootResource() throws IOException {
59     super();
60   }
61 
getTableList()62   private final TableListModel getTableList() throws IOException {
63     TableListModel tableList = new TableListModel();
64     TableName[] tableNames = servlet.getAdmin().listTableNames();
65     for (TableName name: tableNames) {
66       tableList.add(new TableModel(name.getNameAsString()));
67     }
68     return tableList;
69   }
70 
71   @GET
72   @Produces({MIMETYPE_TEXT, MIMETYPE_XML, MIMETYPE_JSON, MIMETYPE_PROTOBUF,
73     MIMETYPE_PROTOBUF_IETF})
get(final @Context UriInfo uriInfo)74   public Response get(final @Context UriInfo uriInfo) {
75     if (LOG.isDebugEnabled()) {
76       LOG.debug("GET " + uriInfo.getAbsolutePath());
77     }
78     servlet.getMetrics().incrementRequests(1);
79     try {
80       ResponseBuilder response = Response.ok(getTableList());
81       response.cacheControl(cacheControl);
82       servlet.getMetrics().incrementSucessfulGetRequests(1);
83       return response.build();
84     } catch (Exception e) {
85       servlet.getMetrics().incrementFailedGetRequests(1);
86       return processException(e);
87     }
88   }
89 
90   @Path("status/cluster")
getClusterStatusResource()91   public StorageClusterStatusResource getClusterStatusResource()
92       throws IOException {
93     return new StorageClusterStatusResource();
94   }
95 
96   @Path("version")
getVersionResource()97   public VersionResource getVersionResource() throws IOException {
98     return new VersionResource();
99   }
100 
101   @Path("{table}")
getTableResource( final @PathParam(R) String table)102   public TableResource getTableResource(
103       final @PathParam("table") String table) throws IOException {
104     return new TableResource(table);
105   }
106 
107   @Path("namespaces")
getNamespaceResource()108   public NamespacesResource getNamespaceResource() throws IOException {
109     return new NamespacesResource();
110   }
111 }
112