/* * 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 cn.edu.ruc.iir.paraflow.connector; import cn.edu.ruc.iir.paraflow.connector.impl.ParaflowMetaDataReader; import cn.edu.ruc.iir.paraflow.connector.impl.ParaflowPrestoConfig; import com.facebook.presto.spi.type.Type; import com.facebook.presto.spi.type.TypeManager; import com.fasterxml.jackson.databind.DeserializationContext; import com.fasterxml.jackson.databind.deser.std.FromStringDeserializer; import com.google.inject.Binder; import com.google.inject.Module; import com.google.inject.Scopes; import javax.inject.Inject; import static com.facebook.presto.hadoop.$internal.com.google.common.base.Preconditions.checkArgument; import static com.facebook.presto.spi.type.TypeSignature.parseTypeSignature; import static io.airlift.configuration.ConfigBinder.configBinder; import static io.airlift.json.JsonBinder.jsonBinder; import static java.util.Objects.requireNonNull; /** * Main binder class. * Bind interface to implementation class, * Bind class in scopes such as SINGLETON, * Bind class to created instance. * * @author [email protected] */ public class ParaflowModule implements Module { private final String connectorId; private final TypeManager typeManager; public ParaflowModule(String connectorId, TypeManager typeManager) { this.connectorId = requireNonNull(connectorId, "connector id is null"); this.typeManager = requireNonNull(typeManager, "typeManager is null"); } /** * Contributes bindings and other configurations for this module to {@code binder}. * * @param binder binder */ @Override public void configure(Binder binder) { binder.bind(ParaflowConnectorId.class).toInstance(new ParaflowConnectorId(connectorId)); binder.bind(TypeManager.class).toInstance(typeManager); configBinder(binder).bindConfig(ParaflowPrestoConfig.class); binder.bind(ParaflowMetadataFactory.class).in(Scopes.SINGLETON); binder.bind(ParaflowMetadata.class).in(Scopes.SINGLETON); binder.bind(ParaflowMetaDataReader.class).in(Scopes.SINGLETON); binder.bind(FSFactory.class).in(Scopes.SINGLETON); binder.bind(ParaflowConnector.class).in(Scopes.SINGLETON); binder.bind(ParaflowSplitManager.class).in(Scopes.SINGLETON); binder.bind(ParaflowPageSourceProvider.class).in(Scopes.SINGLETON); binder.bind(ClassLoader.class).toInstance(ParaflowPlugin.getClassLoader()); jsonBinder(binder).addDeserializerBinding(Type.class).to(TypeDeserializer.class); } public static final class TypeDeserializer extends FromStringDeserializer<Type> { private static final long serialVersionUID = -2173657220571025973L; private final TypeManager typeManager; @Inject public TypeDeserializer(TypeManager typeManager) { super(Type.class); this.typeManager = requireNonNull(typeManager, "typeManager is null"); } @Override protected Type _deserialize(String value, DeserializationContext context) { Type type = typeManager.getType(parseTypeSignature(value)); checkArgument(type != null, "Unknown type %s", value); return type; } } }