/*
* 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.spi.Connector;
import com.facebook.presto.spi.ConnectorFactory;
import com.facebook.presto.spi.NodeManager;
import com.facebook.presto.spi.SchemaTableName;
import com.facebook.presto.spi.type.TypeManager;
import com.google.common.base.Optional;
import com.google.common.base.Supplier;
import com.google.common.base.Throwables;
import com.google.inject.Binder;
import com.google.inject.Injector;
import com.google.inject.Module;
import com.google.inject.Scopes;
import com.google.inject.TypeLiteral;
import com.google.inject.name.Names;
import io.airlift.bootstrap.Bootstrap;
import io.airlift.json.JsonModule;
import java.util.Map;
import static com.google.common.base.Preconditions.checkNotNull;
/**
* Creates Kafka Connectors based off connectorId and specific configuration.
*/
public class KafkaConnectorFactory
implements ConnectorFactory
{
private final TypeManager typeManager;
private final NodeManager nodeManager;
private final Optional<Supplier<Map<SchemaTableName, KafkaTopicDescription>>> tableDescriptionSupplier;
private final Map<String, String> optionalConfig;
KafkaConnectorFactory(TypeManager typeManager,
NodeManager nodeManager,
Optional<Supplier<Map<SchemaTableName, KafkaTopicDescription>>> tableDescriptionSupplier,
Map<String, String> optionalConfig)
{
this.typeManager = checkNotNull(typeManager, "typeManager is null");
this.nodeManager = checkNotNull(nodeManager, "nodeManager is null");
this.optionalConfig = checkNotNull(optionalConfig, "optionalConfig is null");
this.tableDescriptionSupplier = checkNotNull(tableDescriptionSupplier, "tableDescriptionSupplier is null");
}
@Override
public String getName()
{
return "kafka";
}
@Override
public Connector create(final String connectorId, Map<String, String> config)
{
checkNotNull(connectorId, "connectorId is null");
checkNotNull(config, "config is null");
try {
Bootstrap app = new Bootstrap(
new JsonModule(),
new KafkaConnectorModule(),
new Module()
{
@Override
public void configure(Binder binder)
{
binder.bindConstant().annotatedWith(Names.named("connectorId")).to(connectorId);
binder.bind(TypeManager.class).toInstance(typeManager);
binder.bind(NodeManager.class).toInstance(nodeManager);
if (tableDescriptionSupplier.isPresent()) {
binder.bind(new TypeLiteral<Supplier<Map<SchemaTableName, KafkaTopicDescription>>>() {}).toInstance(tableDescriptionSupplier.get());
}
else {
binder.bind(new TypeLiteral<Supplier<Map<SchemaTableName, KafkaTopicDescription>>>() {}).to(KafkaTableDescriptionSupplier.class).in(Scopes.SINGLETON);
}
}
}
);
Injector injector = app.strictConfig()
.doNotInitializeLogging()
.setRequiredConfigurationProperties(config)
.setOptionalConfigurationProperties(optionalConfig)
.initialize();
return injector.getInstance(KafkaConnector.class);
}
catch (Exception e) {
throw Throwables.propagate(e);
}
}
}