/*
* 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.facebook.presto.kafka;
import com.facebook.presto.kafka.decoder.KafkaDecoderModule;
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 com.google.inject.multibindings.Multibinder;
import javax.inject.Inject;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
import static io.airlift.configuration.ConfigurationModule.bindConfig;
import static io.airlift.json.JsonBinder.jsonBinder;
import static io.airlift.json.JsonCodecBinder.jsonCodecBinder;
/**
* Guice module for the Apache Kafka connector.
*/
public class KafkaConnectorModule
implements Module
{
@Override
public void configure(Binder binder)
{
binder.bind(KafkaConnector.class).in(Scopes.SINGLETON);
binder.bind(KafkaHandleResolver.class).in(Scopes.SINGLETON);
binder.bind(KafkaMetadata.class).in(Scopes.SINGLETON);
binder.bind(KafkaSplitManager.class).in(Scopes.SINGLETON);
binder.bind(KafkaRecordSetProvider.class).in(Scopes.SINGLETON);
binder.bind(KafkaSimpleConsumerManager.class).in(Scopes.SINGLETON);
bindConfig(binder).to(KafkaConnectorConfig.class);
jsonBinder(binder).addDeserializerBinding(Type.class).to(TypeDeserializer.class);
jsonCodecBinder(binder).bindJsonCodec(KafkaTopicDescription.class);
binder.install(new KafkaDecoderModule());
for (KafkaInternalFieldDescription internalFieldDescription : KafkaInternalFieldDescription.getInternalFields()) {
bindInternalColumn(binder, internalFieldDescription);
}
}
private static void bindInternalColumn(Binder binder, KafkaInternalFieldDescription fieldDescription)
{
Multibinder<KafkaInternalFieldDescription> fieldDescriptionBinder = Multibinder.newSetBinder(binder, KafkaInternalFieldDescription.class);
fieldDescriptionBinder.addBinding().toInstance(fieldDescription);
}
public static final class TypeDeserializer
extends FromStringDeserializer<Type>
{
private static final long serialVersionUID = 1L;
private final TypeManager typeManager;
@Inject
public TypeDeserializer(TypeManager typeManager)
{
super(Type.class);
this.typeManager = checkNotNull(typeManager, "typeManager is null");
}
@Override
protected Type _deserialize(String value, DeserializationContext context)
{
Type type = typeManager.getType(value);
checkArgument(type != null, "Unknown type %s", value);
return type;
}
}
}