samoa-samza/src/main/java/org/apache/samoa/topology/impl/SamoaSystemFactory.java

/*
 * 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.samoa.topology.impl;

import org.apache.samoa.topology.impl.SamzaEntranceProcessingItem.SamoaSystemConsumer;
import org.apache.samza.SamzaException;
import org.apache.samza.config.Config;
import org.apache.samza.metrics.MetricsRegistry;
import org.apache.samza.system.SystemAdmin;
import org.apache.samza.system.SystemConsumer;
import org.apache.samza.system.SystemFactory;
import org.apache.samza.system.SystemProducer;
import org.apache.samza.util.SinglePartitionWithoutOffsetsSystemAdmin;

/**
 * Implementation of Samza's SystemFactory Samza will use this factory to get our custom consumer which gets the events
 * from SAMOA EntranceProcessor and feed them to EntranceProcessingItem task
 * 
 * @author Anh Thu Vu
 */
public class SamoaSystemFactory implements SystemFactory {
  @Override
  public SystemAdmin getAdmin(String systemName, Config config) {
    return new SinglePartitionWithoutOffsetsSystemAdmin();
  }

  @Override
  public SystemConsumer getConsumer(String systemName, Config config, MetricsRegistry registry) {
    return new SamoaSystemConsumer(systemName, config);
  }

  @Override
  public SystemProducer getProducer(String systemName, Config config, MetricsRegistry registry) {
    throw new SamzaException("This implementation is not supposed to produce anything.");
  }
}