gianm commented on a change in pull request #6094: Introduce SystemSchema tables (#5989) URL: https://github.com/apache/incubator-druid/pull/6094#discussion_r210659443
########## File path: sql/src/main/java/io/druid/sql/calcite/schema/SystemSchema.java ########## @@ -0,0 +1,435 @@ +/* + * 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 io.druid.sql.calcite.schema; + +import com.fasterxml.jackson.core.JsonProcessingException; +import com.fasterxml.jackson.core.type.TypeReference; +import com.fasterxml.jackson.databind.ObjectMapper; +import com.google.common.base.Preconditions; +import com.google.common.collect.FluentIterable; +import com.google.common.collect.ImmutableMap; +import com.google.inject.Inject; +import io.druid.client.BrokerServerView; +import io.druid.client.DruidServer; +import io.druid.client.ImmutableDruidDataSource; +import io.druid.client.coordinator.Coordinator; +import io.druid.client.indexing.IndexingService; +import io.druid.client.selector.QueryableDruidServer; +import io.druid.discovery.DruidLeaderClient; +import io.druid.indexer.TaskStatusPlus; +import io.druid.java.util.common.ISE; +import io.druid.java.util.common.StringUtils; +import io.druid.java.util.common.logger.Logger; +import io.druid.java.util.http.client.response.FullResponseHolder; +import io.druid.segment.column.ValueType; +import io.druid.server.coordination.ServerType; +import io.druid.server.security.AuthorizerMapper; +import io.druid.sql.calcite.table.RowSignature; +import io.druid.timeline.DataSegment; +import org.apache.calcite.DataContext; +import org.apache.calcite.linq4j.Enumerable; +import org.apache.calcite.linq4j.Linq4j; +import org.apache.calcite.rel.type.RelDataType; +import org.apache.calcite.rel.type.RelDataTypeFactory; +import org.apache.calcite.schema.ScannableTable; +import org.apache.calcite.schema.Table; +import org.apache.calcite.schema.impl.AbstractSchema; +import org.apache.calcite.schema.impl.AbstractTable; +import org.jboss.netty.handler.codec.http.HttpMethod; +import org.jboss.netty.handler.codec.http.HttpResponseStatus; + +import java.io.IOException; +import java.util.ArrayList; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.Set; +import java.util.function.Function; +import java.util.stream.Collectors; + +public class SystemSchema extends AbstractSchema +{ + private static final Logger log = new Logger(SystemSchema.class); + + public static final String NAME = "SYS"; + private static final String SEGMENTS_TABLE = "SEGMENTS"; + private static final String SERVERS_TABLE = "SERVERS"; + private static final String SERVERSEGMENTS_TABLE = "SEGMENTSERVERS"; + private static final String TASKS_TABLE = "TASKS"; + private static final int SEGMENTS_TABLE_SIZE; + private static final int SERVERSEGMENTS_TABLE_SIZE; + + private static final RowSignature SEGMENTS_SIGNATURE = RowSignature + .builder() + .add("SEGMENT_ID", ValueType.STRING) + .add("DATASOURCE", ValueType.STRING) + .add("START", ValueType.STRING) + .add("END", ValueType.STRING) + .add("IS_PUBLISHED", ValueType.STRING) + .add("IS_AVAILABLE", ValueType.STRING) + .add("IS_REALTIME", ValueType.STRING) + .add("PAYLOAD", ValueType.STRING) + .build(); + + private static final RowSignature SERVERS_SIGNATURE = RowSignature + .builder() + .add("SERVER", ValueType.STRING) + .add("SERVER_TYPE", ValueType.STRING) + .add("TIER", ValueType.STRING) + .add("CURR_SIZE", ValueType.STRING) + .add("MAX_SIZE", ValueType.STRING) + .build(); + + private static final RowSignature SERVERSEGMENTS_SIGNATURE = RowSignature + .builder() + .add("SERVER", ValueType.STRING) + .add("SEGMENT_ID", ValueType.STRING) + .build(); + + private static final RowSignature TASKS_SIGNATURE = RowSignature + .builder() + .add("TASK_ID", ValueType.STRING) + .add("TYPE", ValueType.STRING) + .add("DATASOURCE", ValueType.STRING) + .add("CREATED_TIME", ValueType.STRING) + .add("QUEUE_INSERTION_TIME", ValueType.STRING) + .add("STATUS", ValueType.STRING) + .add("RUNNER_STATUS", ValueType.STRING) + .add("DURATION", ValueType.STRING) + .add("LOCATION", ValueType.STRING) + .add("ERROR_MSG", ValueType.STRING) + .build(); + + private final Map<String, Table> tableMap; + private final BrokerServerView serverView; + + static { + SEGMENTS_TABLE_SIZE = SEGMENTS_SIGNATURE.getRowOrder().size(); + SERVERSEGMENTS_TABLE_SIZE = SERVERSEGMENTS_SIGNATURE.getRowOrder().size(); + } + + @Inject + public SystemSchema( + final BrokerServerView serverView, + final AuthorizerMapper authorizerMapper, + final @Coordinator DruidLeaderClient coordinatorDruidLeaderClient, + final @IndexingService DruidLeaderClient overlordDruidLeaderClient, + final ObjectMapper jsonMapper + ) + { + Preconditions.checkNotNull(serverView, "serverView"); + this.serverView = serverView; + this.tableMap = ImmutableMap.of( + SEGMENTS_TABLE, new SegmentsTable(coordinatorDruidLeaderClient, jsonMapper), + SERVERS_TABLE, new ServersTable(), + SERVERSEGMENTS_TABLE, new ServerSegmentsTable(), + TASKS_TABLE, new TasksTable(overlordDruidLeaderClient, jsonMapper) + ); + } + + @Override + public Map<String, Table> getTableMap() + { + return tableMap; + } + + private class SegmentsTable extends AbstractTable implements ScannableTable + { + private final DruidLeaderClient druidLeaderClient; + private final ObjectMapper jsonMapper; + + public SegmentsTable( + DruidLeaderClient druidLeaderClient, + ObjectMapper jsonMapper + ) + { + this.druidLeaderClient = druidLeaderClient; + this.jsonMapper = jsonMapper; + } + + @Override + public RelDataType getRowType(RelDataTypeFactory typeFactory) + { + return SEGMENTS_SIGNATURE.getRelDataType(typeFactory); + } + + @Override + public TableType getJdbcTableType() + { + return TableType.SYSTEM_TABLE; + } + + @Override + public Enumerable<Object[]> scan(DataContext root) + { + final List<Object[]> rows = new ArrayList<>(); + final List<ImmutableDruidDataSource> druidDataSourceList = getMetadataSegments(druidLeaderClient, jsonMapper); + final List<DataSegment> matadataSegments = druidDataSourceList + .stream() + .flatMap(t -> t.getSegments().stream()) + .collect(Collectors.toList()); + final Map<String, DataSegment> publishedSegments = matadataSegments + .stream() + .collect(Collectors.toMap( + DataSegment::getIdentifier, + Function.identity() + )); + final Set<String> publishedSegmentIds = matadataSegments + .stream() + .map(DataSegment::getIdentifier) + .collect(Collectors.toSet()); + + final Map<String, QueryableDruidServer> serverViewClients = serverView.getClients(); + for (QueryableDruidServer queryableDruidServer : serverViewClients.values()) { + final Object[] row = new Object[SEGMENTS_TABLE_SIZE]; + final DruidServer druidServer = queryableDruidServer.getServer(); + final ServerType type = druidServer.getType(); + final boolean isSegmentReplicatable = druidServer.segmentReplicatable(); + final Map<String, DataSegment> segments = new HashMap<>(druidServer.getSegments()); + segments.putAll(publishedSegments); // add published segments map + for (Map.Entry<String, DataSegment> segmentEntry : segments.entrySet()) { + String segmentId = segmentEntry.getKey(); + DataSegment segment = segmentEntry.getValue(); + row[0] = segment.getIdentifier(); + row[1] = segment.getDataSource(); + row[2] = segment.getInterval().getStart(); + row[3] = segment.getInterval().getEnd(); + boolean is_available = false; + boolean is_published = false; + boolean is_realtime = false; + if (publishedSegmentIds.contains(segmentId)) { + is_published = true; + } + if (type.toString().equals(ServerType.HISTORICAL.toString())) { + is_available = true; + is_published = true; Review comment: `isPublished` should be based wholly on whether or not the segment is in the metadata store, so don't modify it here. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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