001/*
002 *
003 * Licensed to the Apache Software Foundation (ASF) under one
004 * or more contributor license agreements.  See the NOTICE file
005 * distributed with this work for additional information
006 * regarding copyright ownership.  The ASF licenses this file
007 * to you under the Apache License, Version 2.0 (the
008 * "License"); you may not use this file except in compliance
009 * with the License.  You may obtain a copy of the License at
010 *
011 *     http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 */
019
020package org.apache.hadoop.hbase.rest;
021
022import java.io.IOException;
023
024import javax.ws.rs.GET;
025import javax.ws.rs.Path;
026import javax.ws.rs.PathParam;
027import javax.ws.rs.Produces;
028import javax.ws.rs.core.CacheControl;
029import javax.ws.rs.core.Context;
030import javax.ws.rs.core.Response;
031import javax.ws.rs.core.UriInfo;
032import javax.ws.rs.core.Response.ResponseBuilder;
033
034import org.apache.yetus.audience.InterfaceAudience;
035import org.slf4j.Logger;
036import org.slf4j.LoggerFactory;
037import org.apache.hadoop.hbase.TableName;
038import org.apache.hadoop.hbase.rest.model.TableListModel;
039import org.apache.hadoop.hbase.rest.model.TableModel;
040
041@Path("/")
042@InterfaceAudience.Private
043public class RootResource extends ResourceBase {
044  private static final Logger LOG = LoggerFactory.getLogger(RootResource.class);
045
046  static CacheControl cacheControl;
047  static {
048    cacheControl = new CacheControl();
049    cacheControl.setNoCache(true);
050    cacheControl.setNoTransform(false);
051  }
052
053  /**
054   * Constructor
055   * @throws IOException
056   */
057  public RootResource() throws IOException {
058    super();
059  }
060
061  private final TableListModel getTableList() throws IOException {
062    TableListModel tableList = new TableListModel();
063    TableName[] tableNames = servlet.getAdmin().listTableNames();
064    for (TableName name: tableNames) {
065      tableList.add(new TableModel(name.getNameAsString()));
066    }
067    return tableList;
068  }
069
070  @GET
071  @Produces({MIMETYPE_TEXT, MIMETYPE_XML, MIMETYPE_JSON, MIMETYPE_PROTOBUF,
072    MIMETYPE_PROTOBUF_IETF})
073  public Response get(final @Context UriInfo uriInfo) {
074    if (LOG.isTraceEnabled()) {
075      LOG.trace("GET " + uriInfo.getAbsolutePath());
076    }
077    servlet.getMetrics().incrementRequests(1);
078    try {
079      ResponseBuilder response = Response.ok(getTableList());
080      response.cacheControl(cacheControl);
081      servlet.getMetrics().incrementSucessfulGetRequests(1);
082      return response.build();
083    } catch (Exception e) {
084      servlet.getMetrics().incrementFailedGetRequests(1);
085      return processException(e);
086    }
087  }
088
089  @Path("status/cluster")
090  public StorageClusterStatusResource getClusterStatusResource()
091      throws IOException {
092    return new StorageClusterStatusResource();
093  }
094
095  @Path("version")
096  public VersionResource getVersionResource() throws IOException {
097    return new VersionResource();
098  }
099
100  @Path("{table}")
101  public TableResource getTableResource(
102      final @PathParam("table") String table) throws IOException {
103    return new TableResource(table);
104  }
105
106  @Path("namespaces")
107  public NamespacesResource getNamespaceResource() throws IOException {
108    return new NamespacesResource();
109  }
110}