/*
*
* 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.Map;
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.UriInfo;
import javax.ws.rs.core.Response.ResponseBuilder;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.TableNotFoundException;
import org.apache.hadoop.hbase.client.MetaScanner;
import org.apache.hadoop.hbase.rest.model.TableInfoModel;
import org.apache.hadoop.hbase.rest.model.TableRegionModel;
@InterfaceAudience.Private
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;
}
@GET
@Produces({MIMETYPE_TEXT, MIMETYPE_XML, MIMETYPE_JSON, MIMETYPE_PROTOBUF,
MIMETYPE_PROTOBUF_IETF})
public Response get(final @Context UriInfo uriInfo) {
if (LOG.isDebugEnabled()) {
LOG.debug("GET " + uriInfo.getAbsolutePath());
}
servlet.getMetrics().incrementRequests(1);
try {
TableName tableName = TableName.valueOf(tableResource.getName());
TableInfoModel model = new TableInfoModel(tableName.getNameAsString());
Map<HRegionInfo,ServerName> regions = MetaScanner.allTableRegions(
servlet.getConfiguration(), null, tableName, false);
for (Map.Entry<HRegionInfo,ServerName> e: regions.entrySet()) {
HRegionInfo hri = e.getKey();
ServerName addr = e.getValue();
model.add(
new TableRegionModel(tableName.getNameAsString(), hri.getRegionId(),
hri.getStartKey(), hri.getEndKey(), addr.getHostAndPort()));
}
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();
}
}
}