external/storm-beam/src/main/java/org/apache/storm/beam/translation/UnboundedSourceTranslator.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
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 * 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,
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 * See the License for the specific language governing permissions and
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package org.apache.storm.beam.translation;

import org.apache.beam.sdk.io.Read;
import org.apache.beam.sdk.io.UnboundedSource;
import org.apache.storm.beam.StormPipelineOptions;
import org.apache.storm.beam.translation.runtime.UnboundedSourceSpout;

/**
 * Translates a Read.Unbounded into a Storm spout.
 * @param <T>
 */
public class UnboundedSourceTranslator<T> implements TransformTranslator<Read.Unbounded<T>> {
    public void translateNode(Read.Unbounded<T> transform, TranslationContext context) {
        UnboundedSource source = transform.getSource();
        StormPipelineOptions options = context.getOptions();
        UnboundedSourceSpout spout = new UnboundedSourceSpout(source, options);

        String name = context.getCurrentTransform().getFullName();
        context.addSpout(name, spout);
    }
}