org.apache.hadoop.hbase.stargate.RegionsResource.java Source code

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Here is the source code for org.apache.hadoop.hbase.stargate.RegionsResource.java

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/*
 * 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.HTableInterface;
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 extends ResourceBase {
    private static final Log LOG = LogFactory.getLog(RegionsResource.class);

    static CacheControl cacheControl;
    static {
        cacheControl = new CacheControl();
        cacheControl.setNoCache(true);
        cacheControl.setNoTransform(false);
    }

    User user;
    String tableName;
    String actualTableName;

    public RegionsResource(User user, String table) throws IOException {
        super();
        if (user != null) {
            this.user = user;
            this.actualTableName = !user.isAdmin() ? (user.getName() + "." + table) : table;
        } else {
            this.actualTableName = table;
        }
        this.tableName = table;
    }

    Map<HRegionInfo, HServerAddress> getTableRegions() throws IOException {
        HTablePool pool = servlet.getTablePool();
        HTableInterface table = pool.getTable(actualTableName);
        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) 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);
        }
    }
}