/*
* 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.UriInfo;
import javax.ws.rs.core.Response.ResponseBuilder;
import org.apache.hadoop.hbase.client.HBaseAdmin;
public class ExistsResource implements Constants {
User user;
String tableName;
String actualTableName;
CacheControl cacheControl;
RESTServlet servlet;
public ExistsResource(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;
servlet = RESTServlet.getInstance();
cacheControl = new CacheControl();
cacheControl.setNoCache(true);
cacheControl.setNoTransform(false);
}
@GET
@Produces({MIMETYPE_TEXT, MIMETYPE_XML, MIMETYPE_JSON, MIMETYPE_PROTOBUF,
MIMETYPE_BINARY})
public Response get(final @Context UriInfo uriInfo) throws IOException {
if (!servlet.userRequestLimit(user, 1)) {
Response.status(509).build();
}
try {
HBaseAdmin admin = new HBaseAdmin(servlet.getConfiguration());
if (!admin.tableExists(actualTableName)) {
throw new WebApplicationException(Response.Status.NOT_FOUND);
}
} catch (IOException e) {
throw new WebApplicationException(Response.Status.SERVICE_UNAVAILABLE);
}
ResponseBuilder response = Response.ok();
response.cacheControl(cacheControl);
return response.build();
}
}