org.apache.druid.client.coordinator.CoordinatorClient.java Source code

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Here is the source code for org.apache.druid.client.coordinator.CoordinatorClient.java

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/*
 * 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.druid.client.coordinator;

import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.inject.Inject;
import org.apache.druid.client.ImmutableSegmentLoadInfo;
import org.apache.druid.discovery.DruidLeaderClient;
import org.apache.druid.java.util.common.ISE;
import org.apache.druid.java.util.common.StringUtils;
import org.apache.druid.java.util.http.client.response.FullResponseHolder;
import org.apache.druid.query.SegmentDescriptor;
import org.apache.druid.timeline.DataSegment;
import org.jboss.netty.handler.codec.http.HttpMethod;
import org.jboss.netty.handler.codec.http.HttpResponseStatus;
import org.joda.time.Interval;

import javax.annotation.Nullable;
import javax.ws.rs.core.MediaType;
import java.util.List;

public class CoordinatorClient {
    private final DruidLeaderClient druidLeaderClient;
    private final ObjectMapper jsonMapper;

    @Inject
    public CoordinatorClient(ObjectMapper jsonMapper, @Coordinator DruidLeaderClient druidLeaderClient) {
        this.jsonMapper = jsonMapper;
        this.druidLeaderClient = druidLeaderClient;
    }

    /**
     * Checks the given segment is handed off or not.
     * It can return null if the HTTP call returns 404 which can happen during rolling update.
     */
    @Nullable
    public Boolean isHandOffComplete(String dataSource, SegmentDescriptor descriptor) {
        try {
            FullResponseHolder response = druidLeaderClient.go(druidLeaderClient.makeRequest(HttpMethod.GET,
                    StringUtils.format(
                            "/druid/coordinator/v1/datasources/%s/handoffComplete?interval=%s&partitionNumber=%d&version=%s",
                            StringUtils.urlEncode(dataSource), descriptor.getInterval(),
                            descriptor.getPartitionNumber(), descriptor.getVersion())));

            if (response.getStatus().equals(HttpResponseStatus.NOT_FOUND)) {
                return null;
            }

            if (!response.getStatus().equals(HttpResponseStatus.OK)) {
                throw new ISE("Error while fetching serverView status[%s] content[%s]", response.getStatus(),
                        response.getContent());
            }
            return jsonMapper.readValue(response.getContent(), new TypeReference<Boolean>() {
            });
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public List<ImmutableSegmentLoadInfo> fetchServerView(String dataSource, Interval interval,
            boolean incompleteOk) {
        try {
            FullResponseHolder response = druidLeaderClient.go(druidLeaderClient.makeRequest(HttpMethod.GET,
                    StringUtils.format("/druid/coordinator/v1/datasources/%s/intervals/%s/serverview?partial=%s",
                            StringUtils.urlEncode(dataSource), interval.toString().replace('/', '_'),
                            incompleteOk)));

            if (!response.getStatus().equals(HttpResponseStatus.OK)) {
                throw new ISE("Error while fetching serverView status[%s] content[%s]", response.getStatus(),
                        response.getContent());
            }
            return jsonMapper.readValue(response.getContent(), new TypeReference<List<ImmutableSegmentLoadInfo>>() {
            });
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public List<DataSegment> getDatabaseSegmentDataSourceSegments(String dataSource, List<Interval> intervals) {
        try {
            FullResponseHolder response = druidLeaderClient.go(druidLeaderClient
                    .makeRequest(HttpMethod.POST,
                            StringUtils.format("/druid/coordinator/v1/metadata/datasources/%s/segments?full",
                                    StringUtils.urlEncode(dataSource)))
                    .setContent(MediaType.APPLICATION_JSON, jsonMapper.writeValueAsBytes(intervals)));

            if (!response.getStatus().equals(HttpResponseStatus.OK)) {
                throw new ISE("Error while fetching database segment data source segments status[%s] content[%s]",
                        response.getStatus(), response.getContent());
            }
            return jsonMapper.readValue(response.getContent(), new TypeReference<List<DataSegment>>() {
            });
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public DataSegment getDatabaseSegmentDataSourceSegment(String dataSource, String segmentId) {
        try {
            FullResponseHolder response = druidLeaderClient.go(druidLeaderClient.makeRequest(HttpMethod.GET,
                    StringUtils.format("/druid/coordinator/v1/metadata/datasources/%s/segments/%s",
                            StringUtils.urlEncode(dataSource), StringUtils.urlEncode(segmentId))));

            if (!response.getStatus().equals(HttpResponseStatus.OK)) {
                throw new ISE("Error while fetching database segment data source segment status[%s] content[%s]",
                        response.getStatus(), response.getContent());
            }
            return jsonMapper.readValue(response.getContent(), new TypeReference<DataSegment>() {
            });
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}