com.linkedin.pinot.broker.routing.builder.DefaultRealtimeRoutingTableBuilder.java Source code

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Here is the source code for com.linkedin.pinot.broker.routing.builder.DefaultRealtimeRoutingTableBuilder.java

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/**
 * Copyright (C) 2014-2016 LinkedIn Corp. (pinot-core@linkedin.com)
 *
 * Licensed 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 com.linkedin.pinot.broker.routing.builder;

import com.linkedin.pinot.broker.routing.RoutingTableLookupRequest;
import com.linkedin.pinot.common.config.TableConfig;
import com.linkedin.pinot.common.utils.SegmentName;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.commons.configuration.Configuration;
import org.apache.helix.ZNRecord;
import org.apache.helix.model.ExternalView;
import org.apache.helix.model.InstanceConfig;
import org.apache.helix.store.zk.ZkHelixPropertyStore;

/**
 * Create a given number of routing tables based on random selections from ExternalView.
 */
public class DefaultRealtimeRoutingTableBuilder extends BaseRoutingTableBuilder {
    private RoutingTableBuilder _realtimeHLCRoutingTableBuilder;
    private RoutingTableBuilder _realtimeLLCRoutingTableBuilder;
    private boolean _hasHLC;
    private boolean _hasLLC;

    @Override
    public void init(Configuration configuration, TableConfig tableConfig,
            ZkHelixPropertyStore<ZNRecord> propertyStore) {
        _realtimeHLCRoutingTableBuilder = new KafkaHighLevelConsumerBasedRoutingTableBuilder();
        _realtimeLLCRoutingTableBuilder = new KafkaLowLevelConsumerRoutingTableBuilder();
        _realtimeHLCRoutingTableBuilder.init(configuration, tableConfig, propertyStore);
        _realtimeLLCRoutingTableBuilder.init(configuration, tableConfig, propertyStore);
    }

    @Override
    public void computeRoutingTableFromExternalView(String tableName, ExternalView externalView,
            List<InstanceConfig> instanceConfigs) {
        Set<String> segmentSet = externalView.getPartitionSet();
        for (String segmentName : segmentSet) {
            if (SegmentName.isHighLevelConsumerSegmentName(segmentName)) {
                _hasHLC = true;
            }
            if (SegmentName.isLowLevelConsumerSegmentName(segmentName)) {
                _hasLLC = true;
            }
        }
        if (_hasHLC) {
            _realtimeHLCRoutingTableBuilder.computeRoutingTableFromExternalView(tableName, externalView,
                    instanceConfigs);
        }
        if (_hasLLC) {
            _realtimeLLCRoutingTableBuilder.computeRoutingTableFromExternalView(tableName, externalView,
                    instanceConfigs);
        }
    }

    @Override
    public Map<String, List<String>> getRoutingTable(RoutingTableLookupRequest request) {
        boolean forceLLC = false;
        boolean forceHLC = false;
        for (String routingOption : request.getRoutingOptions()) {
            if (routingOption.equalsIgnoreCase("FORCE_HLC")) {
                forceHLC = true;
            }

            if (routingOption.equalsIgnoreCase("FORCE_LLC")) {
                forceLLC = true;
            }
        }
        if (forceHLC && forceLLC) {
            throw new RuntimeException("Trying to force routing to both HLC and LLC at the same time");
        }

        if (forceLLC) {
            return _realtimeLLCRoutingTableBuilder.getRoutingTable(request);
        } else if (forceHLC) {
            return _realtimeHLCRoutingTableBuilder.getRoutingTable(request);
        } else {
            if (_hasLLC) {
                return _realtimeLLCRoutingTableBuilder.getRoutingTable(request);
            } else if (_hasHLC) {
                return _realtimeHLCRoutingTableBuilder.getRoutingTable(request);
            } else {
                return Collections.emptyMap();
            }
        }
    }

    @Override
    public List<Map<String, List<String>>> getRoutingTables() {
        if (_hasLLC) {
            return _realtimeLLCRoutingTableBuilder.getRoutingTables();
        } else if (_hasHLC) {
            return _realtimeHLCRoutingTableBuilder.getRoutingTables();
        } else {
            return Collections.emptyList();
        }
    }
}