LakshSingla commented on code in PR #16624:
URL: https://github.com/apache/druid/pull/16624#discussion_r1687411289


##########
quidem-it/src/main/java/org/apache/druid/quidem/ExposedAsBrokerQueryComponentSupplierWrapper.java:
##########
@@ -0,0 +1,371 @@
+/*
+ * 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.quidem;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
+import com.google.inject.AbstractModule;
+import com.google.inject.Injector;
+import com.google.inject.Key;
+import com.google.inject.Module;
+import com.google.inject.Provides;
+import com.google.inject.name.Names;
+import org.apache.druid.cli.CliBroker;
+import org.apache.druid.cli.QueryJettyServerInitializer;
+import org.apache.druid.client.BrokerSegmentWatcherConfig;
+import org.apache.druid.client.BrokerServerView;
+import org.apache.druid.client.InternalQueryConfig;
+import org.apache.druid.client.TimelineServerView;
+import org.apache.druid.client.selector.CustomTierSelectorStrategyConfig;
+import org.apache.druid.client.selector.ServerSelectorStrategy;
+import org.apache.druid.client.selector.TierSelectorStrategy;
+import org.apache.druid.curator.CuratorModule;
+import org.apache.druid.curator.discovery.DiscoveryModule;
+import org.apache.druid.discovery.DruidNodeDiscoveryProvider;
+import org.apache.druid.guice.AnnouncerModule;
+import org.apache.druid.guice.BrokerProcessingModule;
+import org.apache.druid.guice.BrokerServiceModule;
+import org.apache.druid.guice.CoordinatorDiscoveryModule;
+import org.apache.druid.guice.DruidInjectorBuilder;
+import org.apache.druid.guice.ExpressionModule;
+import org.apache.druid.guice.ExtensionsModule;
+import org.apache.druid.guice.FirehoseModule;
+import org.apache.druid.guice.JacksonConfigManagerModule;
+import org.apache.druid.guice.JavaScriptModule;
+import org.apache.druid.guice.Jerseys;
+import org.apache.druid.guice.JoinableFactoryModule;
+import org.apache.druid.guice.JsonConfigProvider;
+import org.apache.druid.guice.LazySingleton;
+import org.apache.druid.guice.LifecycleModule;
+import org.apache.druid.guice.LocalDataStorageDruidModule;
+import org.apache.druid.guice.MetadataConfigModule;
+import org.apache.druid.guice.NestedDataModule;
+import org.apache.druid.guice.QueryRunnerFactoryModule;
+import org.apache.druid.guice.SegmentWranglerModule;
+import org.apache.druid.guice.ServerModule;
+import org.apache.druid.guice.ServerTypeConfig;
+import org.apache.druid.guice.ServerViewModule;
+import org.apache.druid.guice.StartupLoggingModule;
+import org.apache.druid.guice.StorageNodeModule;
+import org.apache.druid.guice.annotations.Client;
+import org.apache.druid.guice.annotations.EscalatedClient;
+import org.apache.druid.guice.annotations.Json;
+import org.apache.druid.guice.http.HttpClientModule;
+import org.apache.druid.guice.security.AuthenticatorModule;
+import org.apache.druid.guice.security.AuthorizerModule;
+import org.apache.druid.guice.security.DruidAuthModule;
+import org.apache.druid.initialization.CoreInjectorBuilder;
+import org.apache.druid.initialization.Log4jShutterDownerModule;
+import org.apache.druid.initialization.ServerInjectorBuilder;
+import org.apache.druid.initialization.TombstoneDataStorageModule;
+import org.apache.druid.java.util.common.io.Closer;
+import org.apache.druid.metadata.storage.derby.DerbyMetadataStorageDruidModule;
+import org.apache.druid.query.QueryRunnerFactoryConglomerate;
+import org.apache.druid.query.QuerySegmentWalker;
+import org.apache.druid.query.RetryQueryRunnerConfig;
+import org.apache.druid.query.lookup.LookupExtractorFactoryContainerProvider;
+import org.apache.druid.rpc.guice.ServiceClientModule;
+import org.apache.druid.segment.join.JoinableFactoryWrapper;
+import org.apache.druid.segment.writeout.SegmentWriteOutMediumModule;
+import org.apache.druid.server.BrokerQueryResource;
+import org.apache.druid.server.ClientInfoResource;
+import org.apache.druid.server.DruidNode;
+import org.apache.druid.server.QueryLifecycleFactory;
+import org.apache.druid.server.QuerySchedulerProvider;
+import org.apache.druid.server.ResponseContextConfig;
+import org.apache.druid.server.SpecificSegmentsQuerySegmentWalker;
+import org.apache.druid.server.SubqueryGuardrailHelper;
+import org.apache.druid.server.SubqueryGuardrailHelperProvider;
+import org.apache.druid.server.coordination.ServerType;
+import org.apache.druid.server.emitter.EmitterModule;
+import org.apache.druid.server.http.BrokerResource;
+import org.apache.druid.server.http.SelfDiscoveryResource;
+import org.apache.druid.server.initialization.AuthorizerMapperModule;
+import 
org.apache.druid.server.initialization.ExternalStorageAccessSecurityModule;
+import org.apache.druid.server.initialization.jetty.JettyServerInitializer;
+import org.apache.druid.server.initialization.jetty.JettyServerModule;
+import org.apache.druid.server.log.NoopRequestLogger;
+import org.apache.druid.server.log.RequestLogger;
+import org.apache.druid.server.metrics.QueryCountStatsProvider;
+import org.apache.druid.server.metrics.SubqueryCountStatsProvider;
+import org.apache.druid.server.router.TieredBrokerConfig;
+import org.apache.druid.server.security.AuthenticatorMapper;
+import org.apache.druid.server.security.Escalator;
+import org.apache.druid.server.security.TLSCertificateCheckerModule;
+import org.apache.druid.sql.calcite.planner.CalciteRulesManager;
+import org.apache.druid.sql.calcite.planner.CatalogResolver;
+import org.apache.druid.sql.calcite.run.NativeSqlEngine;
+import org.apache.druid.sql.calcite.run.SqlEngine;
+import org.apache.druid.sql.calcite.schema.BrokerSegmentMetadataCache;
+import org.apache.druid.sql.calcite.schema.DruidSchemaName;
+import org.apache.druid.sql.calcite.util.CalciteTests;
+import org.apache.druid.sql.calcite.util.SqlTestFramework;
+import org.apache.druid.sql.calcite.util.SqlTestFramework.Builder;
+import 
org.apache.druid.sql.calcite.util.SqlTestFramework.PlannerComponentSupplier;
+import 
org.apache.druid.sql.calcite.util.SqlTestFramework.QueryComponentSupplier;
+import org.apache.druid.sql.guice.SqlModule;
+import org.apache.druid.storage.StorageConnectorModule;
+import org.apache.druid.timeline.PruneLoadSpec;
+import org.eclipse.jetty.server.Server;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Properties;
+
+/**
+ * A wrapper class to expose a {@link QueryComponentSupplier} as a Broker 
service.
+ */
+public class ExposedAsBrokerQueryComponentSupplierWrapper implements 
QueryComponentSupplier
+{
+  private QueryComponentSupplier delegate;
+
+  public ExposedAsBrokerQueryComponentSupplierWrapper(QueryComponentSupplier 
delegate)
+  {
+    this.delegate = delegate;
+  }
+
+  @Override
+  public void gatherProperties(Properties properties)
+  {
+    delegate.gatherProperties(properties);
+  }
+
+  @Override
+  public void configureGuice(DruidInjectorBuilder builder)
+  {
+  }
+
+  @Override
+  public void configureGuice(CoreInjectorBuilder builder, List<Module> 
overrideModules)
+  {
+    delegate.configureGuice(builder);
+
+    installForServerModules(builder);
+
+    
overrideModules.addAll(ExposedAsBrokerQueryComponentSupplierWrapper.brokerModules());
+    overrideModules.add(new BrokerTestModule());
+    builder.add(QuidemCaptureModule.class);
+  }
+
+  @Override
+  public QueryRunnerFactoryConglomerate createCongolmerate(Builder builder, 
Closer closer, ObjectMapper om)
+  {
+    return delegate.createCongolmerate(builder, closer, om);
+  }
+
+  @Override
+  public SpecificSegmentsQuerySegmentWalker 
createQuerySegmentWalker(QueryRunnerFactoryConglomerate conglomerate,
+      JoinableFactoryWrapper joinableFactory, Injector injector)
+  {
+    return delegate.createQuerySegmentWalker(conglomerate, joinableFactory, 
injector);
+  }
+
+  @Override
+  public SqlEngine createEngine(QueryLifecycleFactory qlf, ObjectMapper 
objectMapper, Injector injector)
+  {
+    return delegate.createEngine(qlf, objectMapper, injector);
+  }
+
+  @Override
+  public void configureJsonMapper(ObjectMapper mapper)
+  {
+    delegate.configureJsonMapper(mapper);
+  }
+
+  @Override
+  public JoinableFactoryWrapper 
createJoinableFactoryWrapper(LookupExtractorFactoryContainerProvider 
lookupProvider)
+  {
+    return delegate.createJoinableFactoryWrapper(lookupProvider);
+  }
+
+  @Override
+  public void finalizeTestFramework(SqlTestFramework sqlTestFramework)
+  {
+    delegate.finalizeTestFramework(sqlTestFramework);
+  }
+
+  @Override
+  public void close() throws IOException
+  {
+    delegate.close();
+  }
+
+  @Override
+  public PlannerComponentSupplier getPlannerComponentSupplier()
+  {
+    return delegate.getPlannerComponentSupplier();
+  }
+
+  public static class BrokerTestModule extends AbstractModule
+  {
+    @Override
+    protected void configure()
+    {
+      
bind(AuthenticatorMapper.class).toInstance(CalciteTests.TEST_AUTHENTICATOR_MAPPER);
+      
bind(Escalator.class).toInstance(CalciteTests.TEST_AUTHENTICATOR_ESCALATOR);
+      bind(RequestLogger.class).toInstance(new NoopRequestLogger());
+      bind(String.class)
+          .annotatedWith(DruidSchemaName.class)
+          .toInstance(CalciteTests.DRUID_SCHEMA_NAME);
+      bind(QuerySchedulerProvider.class).in(LazySingleton.class);
+      bind(CalciteRulesManager.class).toInstance(new 
CalciteRulesManager(ImmutableSet.of()));
+      bind(CatalogResolver.class).toInstance(CatalogResolver.NULL_RESOLVER);
+    }
+
+    @Provides
+    @LazySingleton
+    public BrokerSegmentMetadataCache provideCache()
+    {
+      return null;
+    }
+
+    @Provides
+    @LazySingleton
+    public Properties getProps()
+    {
+      Properties localProps = new Properties();
+      localProps.put("druid.enableTlsPort", "false");
+      localProps.put("druid.zk.service.enabled", "false");
+      localProps.put("druid.plaintextPort", "12345");
+      localProps.put("druid.host", "localhost");
+      localProps.put("druid.broker.segment.awaitInitializationOnStart", 
"false");
+      return localProps;
+    }
+
+    @Provides
+    @LazySingleton
+    public SqlEngine createMockSqlEngine(
+        final QuerySegmentWalker walker,
+        final QueryRunnerFactoryConglomerate conglomerate,
+        @Json ObjectMapper jsonMapper)
+    {
+      return new 
NativeSqlEngine(CalciteTests.createMockQueryLifecycleFactory(walker, 
conglomerate), jsonMapper);
+    }
+
+    @Provides
+    @LazySingleton
+    DruidNodeDiscoveryProvider getDruidNodeDiscoveryProvider()
+    {
+      final DruidNode coordinatorNode = CalciteTests.mockCoordinatorNode();
+      return CalciteTests.mockDruidNodeDiscoveryProvider(coordinatorNode);
+    }
+  }
+
+  /**
+   * Closely related to {@link CoreInjectorBuilder#forServer()}
+   */
+  private void installForServerModules(CoreInjectorBuilder builder)
+  {
+    builder.add(
+        new Log4jShutterDownerModule(),
+        new LifecycleModule(),
+        ExtensionsModule.SecondaryModule.class,
+        new DruidAuthModule(),
+        TLSCertificateCheckerModule.class,
+        EmitterModule.class,
+        HttpClientModule.global(),
+        HttpClientModule.escalatedGlobal(),
+        new HttpClientModule("druid.broker.http", Client.class, true),
+        new HttpClientModule("druid.broker.http", EscalatedClient.class, true),
+        new CuratorModule(),
+        new AnnouncerModule(),
+        new SegmentWriteOutMediumModule(),
+        new ServerModule(),
+        new StorageNodeModule(),
+        new JettyServerModule(),
+        new ExpressionModule(),
+        new NestedDataModule(),
+        new DiscoveryModule(),
+        new ServerViewModule(),
+        new MetadataConfigModule(),
+        new DerbyMetadataStorageDruidModule(),
+        new JacksonConfigManagerModule(),
+        new CoordinatorDiscoveryModule(),
+        new LocalDataStorageDruidModule(),
+        new TombstoneDataStorageModule(),
+        new FirehoseModule(),
+        new JavaScriptModule(),
+        new AuthenticatorModule(),
+        new AuthorizerModule(),
+        new AuthorizerMapperModule(),
+        new StartupLoggingModule(),
+        new ExternalStorageAccessSecurityModule(),
+        new ServiceClientModule(),
+        new StorageConnectorModule(),
+        new SqlModule(),
+        ServerInjectorBuilder.registerNodeRoleModule(ImmutableSet.of())
+    );
+  }
+
+  /**
+   * Closely related to {@link CliBroker#getModules}.
+   */
+  static List<? extends Module> brokerModules()

Review Comment:
   Where do we bind the ClientQuerySegmentWalker here? I haven't gone through 
the complete PR, however I wanted to know that so that I have a clearer 
understanding of what's going on. 



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