/*
* 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.rest;
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.HTableInterface;
import org.apache.hadoop.hbase.client.HTablePool;
import org.apache.hadoop.hbase.rest.model.TableInfoModel;
import org.apache.hadoop.hbase.rest.model.TableRegionModel;
public class RegionsResource extends ResourceBase {
private static final Log LOG = LogFactory.getLog(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;
}
private Map<HRegionInfo,HServerAddress> getTableRegions()
throws IOException {
HTablePool pool = servlet.getTablePool();
HTableInterface table = pool.getTable(tableResource.getName());
try {
return ((HTable)table).getRegionsInfo();
} finally {
pool.putTable(table);
}
}
@GET
@Produces({MIMETYPE_TEXT, MIMETYPE_XML, MIMETYPE_JSON, MIMETYPE_PROTOBUF})
public Response get(final @Context UriInfo uriInfo) {
if (LOG.isDebugEnabled()) {
LOG.debug("GET " + uriInfo.getAbsolutePath());
}
servlet.getMetrics().incrementRequests(1);
try {
String tableName = tableResource.getName();
TableInfoModel model = new TableInfoModel(tableName);
Map<HRegionInfo,HServerAddress> regions = getTableRegions();
for (Map.Entry<HRegionInfo,HServerAddress> e: regions.entrySet()) {
HRegionInfo hri = e.getKey();
HServerAddress addr = e.getValue();
InetSocketAddress sa = addr.getInetSocketAddress();
model.add(
new TableRegionModel(tableName, hri.getRegionId(),
hri.getStartKey(), hri.getEndKey(),
sa.getHostName() + ":" + Integer.valueOf(sa.getPort())));
}
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);
}
}
}