| /* |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.hadoop.hbase.rest; |
| |
| import java.io.IOException; |
| import java.util.List; |
| import javax.ws.rs.GET; |
| import javax.ws.rs.Produces; |
| import javax.ws.rs.core.CacheControl; |
| import javax.ws.rs.core.Context; |
| import javax.ws.rs.core.Response; |
| import javax.ws.rs.core.Response.ResponseBuilder; |
| import javax.ws.rs.core.UriInfo; |
| import org.apache.hadoop.hbase.HRegionLocation; |
| import org.apache.hadoop.hbase.ServerName; |
| import org.apache.hadoop.hbase.TableName; |
| import org.apache.hadoop.hbase.TableNotFoundException; |
| import org.apache.hadoop.hbase.client.Connection; |
| import org.apache.hadoop.hbase.client.ConnectionFactory; |
| import org.apache.hadoop.hbase.client.RegionInfo; |
| import org.apache.hadoop.hbase.client.RegionLocator; |
| import org.apache.hadoop.hbase.rest.model.TableInfoModel; |
| import org.apache.hadoop.hbase.rest.model.TableRegionModel; |
| import org.apache.yetus.audience.InterfaceAudience; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| @InterfaceAudience.Private |
| public class RegionsResource extends ResourceBase { |
| private static final Logger LOG = LoggerFactory.getLogger(RegionsResource.class); |
| |
| static CacheControl cacheControl; |
| static { |
| cacheControl = new CacheControl(); |
| cacheControl.setNoCache(true); |
| cacheControl.setNoTransform(false); |
| } |
| |
| TableResource tableResource; |
| |
| /** |
| * Constructor |
| * @param tableResource |
| * @throws IOException |
| */ |
| public RegionsResource(TableResource tableResource) throws IOException { |
| super(); |
| this.tableResource = tableResource; |
| } |
| |
| @GET |
| @Produces({MIMETYPE_TEXT, MIMETYPE_XML, MIMETYPE_JSON, MIMETYPE_PROTOBUF, |
| MIMETYPE_PROTOBUF_IETF}) |
| public Response get(final @Context UriInfo uriInfo) { |
| if (LOG.isTraceEnabled()) { |
| LOG.trace("GET " + uriInfo.getAbsolutePath()); |
| } |
| servlet.getMetrics().incrementRequests(1); |
| try { |
| TableName tableName = TableName.valueOf(tableResource.getName()); |
| if (!tableResource.exists()) { |
| throw new TableNotFoundException(tableName); |
| } |
| TableInfoModel model = new TableInfoModel(tableName.getNameAsString()); |
| |
| List<HRegionLocation> locs; |
| try (Connection connection = ConnectionFactory.createConnection(servlet.getConfiguration()); |
| RegionLocator locator = connection.getRegionLocator(tableName)) { |
| locs = locator.getAllRegionLocations(); |
| } |
| for (HRegionLocation loc : locs) { |
| RegionInfo hri = loc.getRegion(); |
| ServerName addr = loc.getServerName(); |
| model.add(new TableRegionModel(tableName.getNameAsString(), hri.getRegionId(), |
| hri.getStartKey(), hri.getEndKey(), addr.getAddress().toString())); |
| } |
| ResponseBuilder response = Response.ok(model); |
| response.cacheControl(cacheControl); |
| servlet.getMetrics().incrementSucessfulGetRequests(1); |
| return response.build(); |
| } catch (TableNotFoundException e) { |
| servlet.getMetrics().incrementFailedGetRequests(1); |
| return Response.status(Response.Status.NOT_FOUND) |
| .type(MIMETYPE_TEXT).entity("Not found" + CRLF) |
| .build(); |
| } catch (IOException e) { |
| servlet.getMetrics().incrementFailedGetRequests(1); |
| return Response.status(Response.Status.SERVICE_UNAVAILABLE) |
| .type(MIMETYPE_TEXT).entity("Unavailable" + CRLF) |
| .build(); |
| } |
| } |
| } |