com.metamx.druid.http.ClientInfoResource.java Source code

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Here is the source code for com.metamx.druid.http.ClientInfoResource.java

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/*
 * Druid - a distributed column store.
 * Copyright (C) 2012  Metamarkets Group Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

package com.metamx.druid.http;

import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;
import com.google.inject.Inject;
import com.metamx.common.IAE;
import com.metamx.druid.client.ClientInventoryManager;
import com.metamx.druid.client.DataSegment;
import com.metamx.druid.client.DruidDataSource;
import com.metamx.druid.client.DruidServer;
import org.joda.time.Interval;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

/**
 */
@Path("/datasources")
public class ClientInfoResource {
    private static final int SEGMENT_HISTORY_MILLIS = 7 * 24 * 60 * 60 * 1000; // ONE WEEK

    private ClientInventoryManager clientInventoryManager;

    @Inject
    public ClientInfoResource(ClientInventoryManager clientInventoryManager) {
        this.clientInventoryManager = clientInventoryManager;
    }

    private Map<String, DruidDataSource> updateDataSources() {
        final Map<String, DruidDataSource> dataSources = Maps.newHashMap();
        for (DruidServer server : clientInventoryManager.getInventory()) {
            for (DruidDataSource dataSource : server.getDataSources()) {
                dataSources.put(dataSource.getName(), dataSource);
            }
        }
        return dataSources;
    }

    @GET
    @Produces("application/json")
    public Iterable<String> getDataSources() {
        return updateDataSources().keySet();
    }

    @GET
    @Path("/{dataSourceName}")
    @Produces("application/json")
    public Map<String, Object> getDatasource(@PathParam("dataSourceName") String dataSourceName,
            @QueryParam("interval") String interval) {
        return ImmutableMap.<String, Object>of("dimensions", getDatasourceDimensions(dataSourceName, interval),
                "metrics", getDatasourceMetrics(dataSourceName, interval));
    }

    @GET
    @Path("/{dataSourceName}/dimensions")
    @Produces("application/json")
    public Iterable<String> getDatasourceDimensions(@PathParam("dataSourceName") String dataSourceName,
            @QueryParam("interval") String interval) {
        DruidDataSource dataSource = updateDataSources().get(dataSourceName);

        Set<String> retVal = Sets.newHashSet();

        Interval dimInterval;
        if (interval == null || interval.isEmpty()) {
            Iterator<DataSegment> iter = Lists.reverse(Lists.newArrayList(dataSource.getSegments())).iterator();
            DataSegment segment = iter.next();
            retVal.addAll(segment.getDimensions());

            dimInterval = new Interval(segment.getInterval().getEnd().minus(SEGMENT_HISTORY_MILLIS),
                    segment.getInterval().getEnd());

            while (iter.hasNext() && dimInterval.contains(segment.getInterval())) {
                retVal.addAll(segment.getDimensions());
                segment = iter.next();
            }
        } else {
            try {
                dimInterval = new Interval(interval);
            } catch (Exception e) {
                throw new IAE("Interval is not in a parseable format!");
            }

            Iterator<DataSegment> iter = dataSource.getSegments().iterator();

            while (iter.hasNext()) {
                DataSegment segment = iter.next();
                if (dimInterval.contains(segment.getInterval())) {
                    retVal.addAll(segment.getDimensions());
                }
            }
        }

        return retVal;
    }

    @GET
    @Path("/{dataSourceName}/metrics")
    @Produces("application/json")
    public Iterable<String> getDatasourceMetrics(@PathParam("dataSourceName") String dataSourceName,
            @QueryParam("interval") String interval) {
        DruidDataSource dataSource = updateDataSources().get(dataSourceName);

        Set<String> retVal = Sets.newHashSet();

        Interval dimInterval;
        if (interval == null || interval.isEmpty()) {
            Iterator<DataSegment> iter = Lists.reverse(Lists.newArrayList(dataSource.getSegments())).iterator();
            DataSegment segment = iter.next();
            retVal.addAll(segment.getMetrics());

            dimInterval = new Interval(segment.getInterval().getEnd().minus(SEGMENT_HISTORY_MILLIS),
                    segment.getInterval().getEnd());

            while (iter.hasNext() && dimInterval.contains(segment.getInterval())) {
                retVal.addAll(segment.getMetrics());
                segment = iter.next();
            }
        } else {
            try {
                dimInterval = new Interval(interval);
            } catch (Exception e) {
                throw new IAE("Interval is not in a parseable format!");
            }

            Iterator<DataSegment> iter = dataSource.getSegments().iterator();

            while (iter.hasNext()) {
                DataSegment segment = iter.next();
                if (dimInterval.contains(segment.getInterval())) {
                    retVal.addAll(segment.getMetrics());
                }
            }
        }

        return retVal;
    }
}