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From gauravgopi123 <...@git.apache.org>
Subject [GitHub] incubator-apex-malhar pull request: MLHR-1936 Adding NiFi operator...
Date Fri, 18 Dec 2015 23:29:28 GMT
Github user gauravgopi123 commented on a diff in the pull request:

    https://github.com/apache/incubator-apex-malhar/pull/133#discussion_r48081357
  
    --- Diff: contrib/src/main/java/com/datatorrent/contrib/nifi/AbstractNiFiOutputOperator.java
---
    @@ -0,0 +1,118 @@
    +/**
    + * 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 com.datatorrent.contrib.nifi;
    +
    +import java.io.IOException;
    +
    +import org.slf4j.Logger;
    +import org.slf4j.LoggerFactory;
    +
    +import org.apache.nifi.remote.Transaction;
    +import org.apache.nifi.remote.TransferDirection;
    +import org.apache.nifi.remote.client.SiteToSiteClient;
    +
    +import com.datatorrent.api.Context;
    +import com.datatorrent.common.util.BaseOperator;
    +import com.datatorrent.netlet.util.DTThrowable;
    +
    +/**
    + * This is the base implementation of a NiFi output operator.&nbsp;
    + * A concrete operator should be created from this skeleton implementation.
    + * <p>
    + * <br>
    + * Ports:<br>
    + * <b>Input</b>: Can have any number of input ports<br>
    + * <b>Output</b>: no output port<br>
    + * <br>
    + * Properties:<br>
    + * None<br>
    + * <br>
    + * Compile time checks:<br>
    + * None<br>
    + * <br>
    + * Run time checks:<br>
    + * None<br>
    + * <br>
    + * Benchmarks:<br>
    + * TBD<br>
    + * <br>
    + * </p>
    + *
    + * @displayName Abstract NiFi Output
    + * @category Messaging
    + * @tags output operator
    + *
    + * @since 3.3.0
    + *
    + */
    +public abstract class AbstractNiFiOutputOperator<T> extends BaseOperator
    +{
    +
    +  private static final Logger LOGGER = LoggerFactory.getLogger(AbstractNiFiOutputOperator.class);
    +
    +  protected SiteToSiteClient client;
    +  protected final SiteToSiteClient.Builder siteToSiteBuilder;
    +  protected final NiFiDataPacketBuilder<T> dataPacketBuilder;
    +
    +  /**
    +   * @param siteToSiteBuilder the builder for a NiFi SiteToSiteClient
    +   * @param dataPacketBuilder a builder to produce NiFiDataPackets from incoming data
    +   */
    +  public AbstractNiFiOutputOperator(final SiteToSiteClient.Builder siteToSiteBuilder,
    +      final NiFiDataPacketBuilder<T> dataPacketBuilder)
    +  {
    +    this.siteToSiteBuilder = siteToSiteBuilder;
    +    this.dataPacketBuilder = dataPacketBuilder;
    +  }
    +
    +  @Override
    +  public void setup(Context.OperatorContext context)
    +  {
    +    this.client = siteToSiteBuilder.build();
    +  }
    +
    +  @Override
    +  public void teardown()
    +  {
    +    try {
    +      client.close();
    +    } catch (IOException e) {
    +      LOGGER.error(e.getMessage(), e);
    --- End diff --
    
    throw exception


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