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;
023import java.util.EnumSet;
024import java.util.Map;
025import javax.ws.rs.GET;
026import javax.ws.rs.Produces;
027import javax.ws.rs.core.CacheControl;
028import javax.ws.rs.core.Context;
029import javax.ws.rs.core.Response;
030import javax.ws.rs.core.Response.ResponseBuilder;
031import javax.ws.rs.core.UriInfo;
032import org.apache.hadoop.hbase.ClusterMetrics;
033import org.apache.hadoop.hbase.ClusterMetrics.Option;
034import org.apache.hadoop.hbase.RegionMetrics;
035import org.apache.hadoop.hbase.ServerMetrics;
036import org.apache.hadoop.hbase.ServerName;
037import org.apache.hadoop.hbase.Size;
038import org.apache.hadoop.hbase.rest.model.StorageClusterStatusModel;
039import org.apache.yetus.audience.InterfaceAudience;
040import org.slf4j.Logger;
041import org.slf4j.LoggerFactory;
042
043@InterfaceAudience.Private
044public class StorageClusterStatusResource extends ResourceBase {
045  private static final Logger LOG =
046    LoggerFactory.getLogger(StorageClusterStatusResource.class);
047
048  static CacheControl cacheControl;
049  static {
050    cacheControl = new CacheControl();
051    cacheControl.setNoCache(true);
052    cacheControl.setNoTransform(false);
053  }
054
055  /**
056   * Constructor
057   * @throws IOException
058   */
059  public StorageClusterStatusResource() throws IOException {
060    super();
061  }
062
063  @GET
064  @Produces({MIMETYPE_TEXT, MIMETYPE_XML, MIMETYPE_JSON, MIMETYPE_PROTOBUF,
065    MIMETYPE_PROTOBUF_IETF})
066  public Response get(final @Context UriInfo uriInfo) {
067    if (LOG.isTraceEnabled()) {
068      LOG.trace("GET " + uriInfo.getAbsolutePath());
069    }
070    servlet.getMetrics().incrementRequests(1);
071    try {
072      ClusterMetrics status = servlet.getAdmin().getClusterMetrics(
073        EnumSet.of(Option.LIVE_SERVERS, Option.DEAD_SERVERS));
074      StorageClusterStatusModel model = new StorageClusterStatusModel();
075      model.setRegions(status.getRegionCount());
076      model.setRequests(status.getRequestCount());
077      model.setAverageLoad(status.getAverageLoad());
078      for (Map.Entry<ServerName, ServerMetrics> entry: status.getLiveServerMetrics().entrySet()) {
079        ServerName sn = entry.getKey();
080        ServerMetrics load = entry.getValue();
081        StorageClusterStatusModel.Node node =
082          model.addLiveNode(
083            sn.getHostname() + ":" +
084            Integer.toString(sn.getPort()),
085            sn.getStartcode(), (int) load.getUsedHeapSize().get(Size.Unit.MEGABYTE),
086            (int) load.getMaxHeapSize().get(Size.Unit.MEGABYTE));
087        node.setRequests(load.getRequestCount());
088        for (RegionMetrics region: load.getRegionMetrics().values()) {
089          node.addRegion(region.getRegionName(), region.getStoreCount(),
090            region.getStoreFileCount(),
091            (int) region.getStoreFileSize().get(Size.Unit.MEGABYTE),
092            (int) region.getMemStoreSize().get(Size.Unit.MEGABYTE),
093            (long) region.getStoreFileIndexSize().get(Size.Unit.KILOBYTE),
094            region.getReadRequestCount(),
095            region.getCpRequestCount(),
096            region.getWriteRequestCount(),
097            (int) region.getStoreFileRootLevelIndexSize().get(Size.Unit.KILOBYTE),
098            (int) region.getStoreFileUncompressedDataIndexSize().get(Size.Unit.KILOBYTE),
099            (int) region.getBloomFilterSize().get(Size.Unit.KILOBYTE),
100            region.getCompactingCellCount(),
101            region.getCompactedCellCount());
102        }
103      }
104      for (ServerName name: status.getDeadServerNames()) {
105        model.addDeadNode(name.toString());
106      }
107      ResponseBuilder response = Response.ok(model);
108      response.cacheControl(cacheControl);
109      servlet.getMetrics().incrementSucessfulGetRequests(1);
110      return response.build();
111    } catch (IOException e) {
112      servlet.getMetrics().incrementFailedGetRequests(1);
113      return Response.status(Response.Status.SERVICE_UNAVAILABLE)
114        .type(MIMETYPE_TEXT).entity("Unavailable" + CRLF)
115        .build();
116    }
117  }
118}