From commits-return-20918-archive-asf-public=cust-asf.ponee.io@pulsar.apache.org Thu Jan 24 01:59:06 2019 Return-Path: X-Original-To: archive-asf-public@cust-asf.ponee.io Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by mx-eu-01.ponee.io (Postfix) with SMTP id 1EA661807AC for ; Thu, 24 Jan 2019 01:59:03 +0100 (CET) Received: (qmail 58172 invoked by uid 500); 24 Jan 2019 00:59:03 -0000 Mailing-List: contact commits-help@pulsar.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@pulsar.apache.org Delivered-To: mailing list commits@pulsar.apache.org Received: (qmail 57881 invoked by uid 99); 24 Jan 2019 00:59:02 -0000 Received: from ec2-52-202-80-70.compute-1.amazonaws.com (HELO gitbox.apache.org) (52.202.80.70) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 24 Jan 2019 00:59:02 +0000 From: GitBox To: commits@pulsar.apache.org Subject: [GitHub] sijie commented on a change in pull request #3379: Issue #3378: [pulsar-io] Support Pulsar to receive and send data from Apache NiFi Message-ID: <154829154234.1849.4869709033748035296.gitbox@gitbox.apache.org> Date: Thu, 24 Jan 2019 00:59:02 -0000 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit sijie commented on a change in pull request #3379: Issue #3378: [pulsar-io] Support Pulsar to receive and send data from Apache NiFi URL: https://github.com/apache/pulsar/pull/3379#discussion_r250431885 ########## File path: pulsar-io/nifi/src/main/java/org/apache/pulsar/io/nifi/NiFiSource.java ########## @@ -0,0 +1,185 @@ +/** + * 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.pulsar.io.nifi; + +import com.google.common.base.Preconditions; +import com.google.common.collect.Lists; +import lombok.extern.slf4j.Slf4j; +import org.apache.nifi.remote.Transaction; +import org.apache.nifi.remote.TransferDirection; +import org.apache.nifi.remote.client.SiteToSiteClient; +import org.apache.nifi.remote.client.SiteToSiteClientConfig; +import org.apache.nifi.remote.protocol.DataPacket; +import org.apache.nifi.stream.io.StreamUtils; +import org.apache.pulsar.functions.api.Record; +import org.apache.pulsar.io.core.PushSource; +import org.apache.pulsar.io.core.SourceContext; +import org.apache.pulsar.io.core.annotations.Connector; +import org.apache.pulsar.io.core.annotations.IOType; + +import java.io.IOException; +import java.io.InputStream; +import java.util.List; +import java.util.Map; + + +/** + * A source that pulls data from Apache NiFi using the NiFi Site-to-Site client. This source + * produces NiFiDataPackets which encapsulate the content and attributes of a NiFi FlowFile. + */ +@Connector( + name = "nifi", + type = IOType.SOURCE, + help = "A simple connector to move messages from Apache NiFi using the NiFi Site-to-Site client to a Pulsar topic", + configClass = NiFiConfig.class) +@Slf4j +public class NiFiSource extends PushSource { + + private long waitTimeMs; + private volatile boolean isRunning = true; + private NiFiConfig niFiConfig; + private SiteToSiteClientConfig clientConfig; + + private Thread runnerThread; + + @Override + public void open(Map config, SourceContext sourceContext) throws Exception { + niFiConfig = NiFiConfig.load(config); + Preconditions.checkNotNull(niFiConfig.getUrl(), "url property not set."); + Preconditions.checkNotNull(niFiConfig.getPortName(), "portName property not set."); + Preconditions.checkArgument(niFiConfig.getWaitTimeMs() > 0, + "waitTimeMs must be a positive long."); + + waitTimeMs = niFiConfig.getWaitTimeMs(); + clientConfig = new SiteToSiteClient.Builder() + .url(niFiConfig.getUrl()) + .portName(niFiConfig.getPortName()) + .requestBatchCount(niFiConfig.getRequestBatchCount()) + .buildConfig(); + + this.start(); + } + + @Override + public void close() throws Exception { + this.isRunning = false; + if (runnerThread != null) { + runnerThread.interrupt(); + runnerThread.join(); + runnerThread = null; + } + } + + protected void start() throws Exception { + runnerThread = new Thread(new ReceiveRunnable()); + runnerThread.setName("Nifi Source Thread"); + runnerThread.start(); + } + + + class ReceiveRunnable implements Runnable { + + public ReceiveRunnable() { + + } + + @Override + public void run() { + try { + final SiteToSiteClient client = new SiteToSiteClient.Builder().fromConfig(clientConfig).build(); + try { + while (isRunning) { + final Transaction transaction = client.createTransaction(TransferDirection.RECEIVE); + DataPacket dataPacket = transaction.receive(); + if (dataPacket == null) { + // no data available. Wait a bit and try again + try { + Thread.sleep(waitTimeMs); + } catch (InterruptedException e) { + log.warn("Failed to thread sleep milliseconds " + waitTimeMs, e); + } + continue; + } + + final List dataPackets = Lists.newArrayList(); + do { + // Read the data into a byte array and wrap it along with the attributes + // into a NiFiDataPacket. + final InputStream inStream = dataPacket.getData(); + final byte[] data = new byte[(int) dataPacket.getSize()]; + StreamUtils.fillBuffer(inStream, data); + + final Map attributes = dataPacket.getAttributes(); + final NiFiDataPacket NiFiDataPacket = new StandardNiFiDataPacket(data, attributes); + dataPackets.add(NiFiDataPacket); + dataPacket = transaction.receive(); + } while (dataPacket != null); + + // Confirm transaction to verify the data + transaction.confirm(); + + for (NiFiDataPacket dp : dataPackets) { + consume(new NiFiRecord(dp, transaction)); + } + + transaction.complete(); Review comment: we shouldn't complete here, the transaction should only be completed when a record is acked ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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