com.datatorrent.usertest.RandomNumberGenerator.java Source code

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Here is the source code for com.datatorrent.usertest.RandomNumberGenerator.java

Source

/**
 * Put your copyright and license info here.
 */
package com.datatorrent.usertest;

import com.datatorrent.api.Context.OperatorContext;
import com.datatorrent.api.DefaultOutputPort;
import com.datatorrent.api.InputOperator;
import com.datatorrent.common.util.BaseOperator;
import java.io.IOException;
import java.util.logging.Level;
import org.apache.hadoop.security.UserGroupInformation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * This is a simple operator that emits random number.
 */
public class RandomNumberGenerator extends BaseOperator implements InputOperator {
    @Override
    public void setup(OperatorContext context) {
        try {
            LOG.info("User {}", UserGroupInformation.getCurrentUser().getUserName());
        } catch (IOException ex) {
            throw new RuntimeException(ex);
        }
    }

    @Override
    public void emitTuples() {
    }

    private static final Logger LOG = LoggerFactory.getLogger(RandomNumberGenerator.class);
}