/*
* 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 java.net.InetSocketAddress;
import java.util.Map;
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.UriInfo;
import javax.ws.rs.core.Response.ResponseBuilder;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.HServerAddress;
import org.apache.hadoop.hbase.TableNotFoundException;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.HTablePool;
import org.apache.hadoop.hbase.stargate.User;
import org.apache.hadoop.hbase.stargate.model.TableInfoModel;
import org.apache.hadoop.hbase.stargate.model.TableRegionModel;
public class RegionsResource implements Constants {
private static final Log LOG = LogFactory.getLog(RegionsResource.class);
User user;
String tableName;
String actualTableName;
CacheControl cacheControl;
RESTServlet servlet;
public RegionsResource(User user, String table) throws IOException {
if (user != null) {
this.user = user;
this.actualTableName =
!user.isAdmin() ? (user.getName() + "." + table) : table;
} else {
this.actualTableName = table;
}
this.tableName = table;
cacheControl = new CacheControl();
cacheControl.setNoCache(true);
cacheControl.setNoTransform(false);
servlet = RESTServlet.getInstance();
}
private Map<HRegionInfo,HServerAddress> getTableRegions()
throws IOException {
HTablePool pool = servlet.getTablePool();
HTable table = pool.getTable(actualTableName);
try {
return table.getRegionsInfo();
} finally {
pool.putTable(table);
}
}
@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 {
String name = user.isAdmin() ? actualTableName : tableName;
TableInfoModel model = new TableInfoModel(name);
Map<HRegionInfo,HServerAddress> regions = getTableRegions();
for (Map.Entry<HRegionInfo,HServerAddress> e: regions.entrySet()) {
HRegionInfo hri = e.getKey();
if (user.isAdmin()) {
HServerAddress addr = e.getValue();
InetSocketAddress sa = addr.getInetSocketAddress();
model.add(
new TableRegionModel(name, hri.getRegionId(), hri.getStartKey(),
hri.getEndKey(),
sa.getHostName() + ":" + Integer.valueOf(sa.getPort())));
} else {
model.add(
new TableRegionModel(name, hri.getRegionId(), hri.getStartKey(),
hri.getEndKey()));
}
}
ResponseBuilder response = Response.ok(model);
response.cacheControl(cacheControl);
return response.build();
} catch (TableNotFoundException e) {
throw new WebApplicationException(Response.Status.NOT_FOUND);
} catch (IOException e) {
throw new WebApplicationException(e,
Response.Status.SERVICE_UNAVAILABLE);
}
}
}