001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.rest;
019
020import java.io.IOException;
021import org.apache.yetus.audience.InterfaceAudience;
022
023import org.apache.hbase.thirdparty.javax.ws.rs.GET;
024import org.apache.hbase.thirdparty.javax.ws.rs.Produces;
025import org.apache.hbase.thirdparty.javax.ws.rs.core.CacheControl;
026import org.apache.hbase.thirdparty.javax.ws.rs.core.Context;
027import org.apache.hbase.thirdparty.javax.ws.rs.core.Response;
028import org.apache.hbase.thirdparty.javax.ws.rs.core.Response.ResponseBuilder;
029import org.apache.hbase.thirdparty.javax.ws.rs.core.UriInfo;
030
031@InterfaceAudience.Private
032public class ExistsResource extends ResourceBase {
033
034  static CacheControl cacheControl;
035  static {
036    cacheControl = new CacheControl();
037    cacheControl.setNoCache(true);
038    cacheControl.setNoTransform(false);
039  }
040
041  TableResource tableResource;
042
043  /**
044   * Constructor
045   */
046  public ExistsResource(TableResource tableResource) throws IOException {
047    super();
048    this.tableResource = tableResource;
049  }
050
051  @GET
052  @Produces({ MIMETYPE_TEXT, MIMETYPE_XML, MIMETYPE_JSON, MIMETYPE_PROTOBUF, MIMETYPE_PROTOBUF_IETF,
053    MIMETYPE_BINARY })
054  public Response get(final @Context UriInfo uriInfo) {
055    try {
056      if (!tableResource.exists()) {
057        return Response.status(Response.Status.NOT_FOUND).type(MIMETYPE_TEXT)
058          .entity("Not found" + CRLF).build();
059      }
060    } catch (IOException e) {
061      return Response.status(Response.Status.SERVICE_UNAVAILABLE).type(MIMETYPE_TEXT)
062        .entity("Unavailable" + CRLF).build();
063    }
064    ResponseBuilder response = Response.ok();
065    response.cacheControl(cacheControl);
066    return response.build();
067  }
068}