/*
* 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.nifi.test.processors;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Collections;
import java.util.HashSet;
import java.util.Random;
import java.util.Set;
import org.apache.nifi.processor.AbstractProcessor;
import org.apache.nifi.flowfile.FlowFile;
import org.apache.nifi.processor.ProcessContext;
import org.apache.nifi.processor.ProcessSession;
import org.apache.nifi.processor.ProcessorInitializationContext;
import org.apache.nifi.processor.Relationship;
import org.apache.nifi.processor.io.OutputStreamCallback;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class DataGeneratorTestProcessor extends AbstractProcessor {
public static final Relationship REL_SUCCESS = new Relationship.Builder().name("success").build();
private static final Logger LOG = LoggerFactory.getLogger(DataGeneratorTestProcessor.class);
private final Set<Relationship> relationships;
public DataGeneratorTestProcessor() {
final Set<Relationship> rels = new HashSet<>();
rels.add(REL_SUCCESS);
relationships = Collections.unmodifiableSet(rels);
}
@Override
public Set<Relationship> getRelationships() {
return relationships;
}
@Override
public void onTrigger(final ProcessContext context, final ProcessSession session) {
FlowFile toRemove = session.get();
if (toRemove != null) {
LOG.warn("Removing flow file");
session.remove(toRemove);
}
FlowFile flowFile = session.create();
final Random random = new Random();
final byte[] data = new byte[4096];
random.nextBytes(data);
flowFile = session.write(flowFile, new OutputStreamCallback() {
@Override
public void process(final OutputStream out) throws IOException {
out.write(data);
}
});
LOG.info("{} transferring {} to success", new Object[]{this, flowFile});
session.transfer(flowFile, REL_SUCCESS);
session.commit();
}
@Override
protected void init(final ProcessorInitializationContext context) {
}
}