org.streampipes.wrapper.flink.sink.FlinkJmsProducer Maven / Gradle / Ivy

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/*
 * Copyright 2018 FZI Forschungszentrum Informatik
 *
 * 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 org.streampipes.wrapper.flink.sink;

import org.apache.flink.configuration.Configuration;
import org.apache.flink.streaming.api.functions.sink.RichSinkFunction;
import org.streampipes.messaging.jms.ActiveMQPublisher;
import org.streampipes.model.grounding.JmsTransportProtocol;
import org.streampipes.wrapper.flink.serializer.ByteArraySerializer;

import java.util.Map;


public class FlinkJmsProducer extends RichSinkFunction> {

  /**
   *
   */
  private static final long serialVersionUID = 1L;
  private JmsTransportProtocol protocol;

  private ByteArraySerializer serializationSchema;

  private ActiveMQPublisher publisher;

  public FlinkJmsProducer(JmsTransportProtocol protocol, ByteArraySerializer
          serializationSchema) {
    this.protocol = protocol;
    this.serializationSchema = serializationSchema;
  }

  @Override
  public void open(Configuration configuration) throws Exception {
    try {
      publisher = new ActiveMQPublisher();
      publisher.connect(protocol);
    } catch (Exception e) {
      throw new Exception("Failed to open Jms connection: " + e.getMessage(), e);
    }
  }

  @Override
  public void invoke(Map value) throws Exception {
    byte[] msg = serializationSchema.serialize(value);
    publisher.publish(msg);
  }
}