/*
* Copyright 2010 The Apache Software Foundation
*
* 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.stargate;
import java.io.IOException;
import javax.ws.rs.GET;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
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.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.ClusterStatus;
import org.apache.hadoop.hbase.HServerInfo;
import org.apache.hadoop.hbase.HServerLoad;
import org.apache.hadoop.hbase.client.HBaseAdmin;
import org.apache.hadoop.hbase.stargate.model.StorageClusterStatusModel;
public class StorageClusterStatusResource implements Constants {
private static final Log LOG =
LogFactory.getLog(StorageClusterStatusResource.class);
private User user;
private CacheControl cacheControl;
private RESTServlet servlet;
public StorageClusterStatusResource(User user) throws IOException {
this.user = user;
this.servlet = RESTServlet.getInstance();
this.cacheControl = new CacheControl();
this.cacheControl.setNoCache(true);
this.cacheControl.setNoTransform(false);
}
@GET
@Produces({MIMETYPE_TEXT, MIMETYPE_XML, MIMETYPE_JSON, MIMETYPE_PROTOBUF})
public Response get(final @Context UriInfo uriInfo) throws IOException {
if (LOG.isDebugEnabled()) {
LOG.debug("GET " + uriInfo.getAbsolutePath());
}
if (!servlet.userRequestLimit(user, 1)) {
Response.status(509).build();
}
servlet.getMetrics().incrementRequests(1);
try {
HBaseAdmin admin = new HBaseAdmin(servlet.getConfiguration());
ClusterStatus status = admin.getClusterStatus();
StorageClusterStatusModel model = new StorageClusterStatusModel();
model.setRegions(status.getRegionsCount());
model.setRequests(status.getRequestsCount());
model.setAverageLoad(status.getAverageLoad());
for (HServerInfo info: status.getServerInfo()) {
HServerLoad load = info.getLoad();
StorageClusterStatusModel.Node node =
model.addLiveNode(
info.getServerAddress().getHostname() + ":" +
Integer.toString(info.getServerAddress().getPort()),
info.getStartCode(), load.getUsedHeapMB(),
load.getMaxHeapMB());
node.setRequests(load.getNumberOfRequests());
for (HServerLoad.RegionLoad region: load.getRegionsLoad()) {
node.addRegion(region.getName(), region.getStores(),
region.getStorefiles(), region.getStorefileSizeMB(),
region.getMemStoreSizeMB(), region.getStorefileIndexSizeMB());
}
}
for (String name: status.getDeadServerNames()) {
model.addDeadNode(name);
}
ResponseBuilder response = Response.ok(model);
response.cacheControl(cacheControl);
return response.build();
} catch (IOException e) {
throw new WebApplicationException(e,
Response.Status.SERVICE_UNAVAILABLE);
}
}
}