/*
* 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.processors.flume;
import java.util.ArrayList;
import java.util.List;
import org.apache.flume.Event;
import org.apache.flume.channel.BasicTransactionSemantics;
import org.apache.nifi.flowfile.FlowFile;
import org.apache.nifi.processor.ProcessSession;
import org.apache.nifi.processor.Relationship;
import org.apache.nifi.processors.flume.util.FlowFileEvent;
class NifiSinkTransaction extends BasicTransactionSemantics {
private final ProcessSession session;
private final Relationship success;
private final Relationship failure;
private final List<FlowFile> flowFiles;
public NifiSinkTransaction(ProcessSession session, Relationship success, Relationship failure) {
this.session = session;
this.success = success;
this.failure = failure;
this.flowFiles = new ArrayList<>();
}
@Override
protected void doPut(Event event) throws InterruptedException {
AbstractFlumeProcessor.transferEvent(event, session, success);
}
@Override
protected Event doTake() throws InterruptedException {
FlowFile flowFile = session.get();
if (flowFile == null) {
return null;
}
flowFiles.add(flowFile);
return new FlowFileEvent(flowFile, session);
}
@Override
protected void doCommit() throws InterruptedException {
session.transfer(flowFiles, success);
session.commit();
}
@Override
protected void doRollback() throws InterruptedException {
session.transfer(flowFiles, failure);
session.commit();
}
}