Java StreamExecutionEnvironment類代碼示例

import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; //導入依賴的package包/類
@Test
public void testSimpleWriteAndRead() throws Exception {
    StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
    DataStream<Event> input = env.fromElements(
        Event.of(1, "start", 1.0),
        Event.of(2, "middle", 2.0),
        Event.of(3, "end", 3.0),
        Event.of(4, "start", 4.0),
        Event.of(5, "middle", 5.0),
        Event.of(6, "end", 6.0)
    );

    String path = tempFolder.newFile().toURI().toString();
    input.transform("transformer", TypeInformation.of(Event.class), new StreamMap<>(new MapFunction<Event, Event>() {
        @Override
        public Event map(Event event) throws Exception {
            return event;
        }
    })).writeAsText(path);
    env.execute();
    Assert.assertEquals(6, getLineCount(path));
}
 

import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; //導入依賴的package包/類
public static void main(String[] args) throws Exception {
    StreamExecutionEnvironment env = StreamExecutionEnvironment.createLocalEnvironment();

    Properties properties = new Properties();
    properties.load(new FileInputStream("src/main/resources/application.properties"));

    Properties mqttProperties = new Properties();

    // client id = a:<Organization_ID>:<App_Id>
    mqttProperties.setProperty(MQTTSource.CLIENT_ID,
            String.format("a:%s:%s",
                    properties.getProperty("Org_ID"),
                    properties.getProperty("App_Id")));

    // mqtt server url = tcp://<Org_ID>.messaging.internetofthings.ibmcloud.com:1883
    mqttProperties.setProperty(MQTTSource.URL,
            String.format("tcp://%s.messaging.internetofthings.ibmcloud.com:1883",
                    properties.getProperty("Org_ID")));

    // topic = iot-2/type/<Device_Type>/id/<Device_ID>/evt/<Event_Id>/fmt/json
    mqttProperties.setProperty(MQTTSource.TOPIC,
            String.format("iot-2/type/%s/id/%s/evt/%s/fmt/json",
                    properties.getProperty("Device_Type"),
                    properties.getProperty("Device_ID"),
                    properties.getProperty("EVENT_ID")));

    mqttProperties.setProperty(MQTTSource.USERNAME, properties.getProperty("API_Key"));
    mqttProperties.setProperty(MQTTSource.PASSWORD, properties.getProperty("APP_Authentication_Token"));


    MQTTSource mqttSource = new MQTTSource(mqttProperties);
    DataStreamSource<String> tempratureDataSource = env.addSource(mqttSource);
    DataStream<String> stream = tempratureDataSource.map((MapFunction<String, String>) s -> s);
    stream.print();

    env.execute("Temperature Analysis");
}
 

import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; //導入依賴的package包/類
@Test(expected = InvalidTypesException.class)
public void testUnboundedPojoSourceButReturnInvalidTupleType() throws Exception {
    StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
    DataStream<Event> input = env.addSource(new RandomEventSource(5).closeDelay(1500));

    DataStream<Tuple5<Long, Integer, String, Double, Long>> output = SiddhiCEP
        .define("inputStream", input, "id", "name", "price", "timestamp")
        .cql("from inputStream select timestamp, id, name, price insert into  outputStream")
        .returns("outputStream");

    DataStream<Long> following = output.map(new MapFunction<Tuple5<Long, Integer, String, Double, Long>, Long>() {
        @Override
        public Long map(Tuple5<Long, Integer, String, Double, Long> value) throws Exception {
            return value.f0;
        }
    });

    String resultPath = tempFolder.newFile().toURI().toString();
    following.writeAsText(resultPath, FileSystem.WriteMode.OVERWRITE);
    env.execute();
    assertEquals(5, getLineCount(resultPath));
    env.execute();
}
 

import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; //導入依賴的package包/類
public static void main(String[] args) throws Exception {
    // set up the execution environment
    final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

    Properties props = new Properties();
    props.setProperty(TwitterSource.CONSUMER_KEY, "...");
    props.setProperty(TwitterSource.CONSUMER_SECRET, "...");
    props.setProperty(TwitterSource.TOKEN, "...");
    props.setProperty(TwitterSource.TOKEN_SECRET, "...");

    env.addSource(new TwitterSource(props))
        .flatMap(new ExtractHashTags())
        .keyBy(0)
        .timeWindow(Time.seconds(30))
        .sum(1)
        .filter(new FilterHashTags())
        .timeWindowAll(Time.seconds(30))
        .apply(new GetTopHashTag())
        .print();

    env.execute();
}
 

import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; //導入依賴的package包/類
public static void main(String[] args) throws Exception {
	StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

	Properties properties = new Properties();
	properties.setProperty("bootstrap.servers", "localhost:9092");
	properties.setProperty("group.id", "test");

	DataStream<TemperatureEvent> inputEventStream = env.addSource(
			new FlinkKafkaConsumer09<TemperatureEvent>("test", new EventDeserializationSchema(), properties));

	Pattern<TemperatureEvent, ?> warningPattern = Pattern.<TemperatureEvent> begin("first")
			.subtype(TemperatureEvent.class).where(new FilterFunction<TemperatureEvent>() {
				private static final long serialVersionUID = 1L;

				public boolean filter(TemperatureEvent value) {
					if (value.getTemperature() >= 26.0) {
						return true;
					}
					return false;
				}
			}).within(Time.seconds(10));

	DataStream<Alert> patternStream = CEP.pattern(inputEventStream, warningPattern)
			.select(new PatternSelectFunction<TemperatureEvent, Alert>() {
				private static final long serialVersionUID = 1L;

				public Alert select(Map<String, TemperatureEvent> event) throws Exception {

					return new Alert("Temperature Rise Detected:" + event.get("first").getTemperature()
							+ " on machine name:" + event.get("first").getMachineName());
				}

			});

	patternStream.print();
	env.execute("CEP on Temperature Sensor");
}
 

import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; //導入依賴的package包/類
public static void main(String args[]) throws Exception {
    ParameterTool tool = ParameterTool.fromArgs(args);

    Properties p = new Properties();
    p.setProperty(TwitterSource.CONSUMER_KEY, tool.getRequired("consumer.key"));
    p.setProperty(TwitterSource.CONSUMER_SECRET, tool.getRequired("consumer.secret"));
    p.setProperty(TwitterSource.TOKEN, tool.getRequired("token"));
    p.setProperty(TwitterSource.TOKEN_SECRET, tool.getRequired("token.secret"));

    StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
    env.setStreamTimeCharacteristic(TimeCharacteristic.IngestionTime);

    DataStream<String> streamSource = env.addSource(new TwitterSource(p));

    // Every 10 minutes, most trending of last 1 hour of tweets.
    SlidingEventTimeWindows windowSpec = SlidingEventTimeWindows.of(Time.hours(1), Time.minutes(10));

    streamSource.flatMap(hashTagExtraction())
            .keyBy(0)
            .sum(1)
            .windowAll(windowSpec)
            .maxBy(1)
            .writeAsText("file:///Users/abij/projects/tryouts/flink-streaming-xke/hot-hashtags.log", OVERWRITE);

    env.execute("Twitter Stream");
}
 

import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; //導入依賴的package包/類
@Test
public void testFoldWindowState() throws Exception {
	final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
	env.setStreamTimeCharacteristic(TimeCharacteristic.IngestionTime);
	env.registerTypeWithKryoSerializer(File.class, JavaSerializer.class);

	DataStream<String> src = env.fromElements("abc");

	SingleOutputStreamOperator<?> result = src
			.keyBy(new KeySelector<String, String>() {
				@Override
				public String getKey(String value) {
					return null;
				}
			})
			.timeWindow(Time.milliseconds(1000))
			.fold(new File("/"), new FoldFunction<String, File>() {

				@Override
				public File fold(File a, String e) {
					return null;
				}
			});

	validateStateDescriptorConfigured(result);
}
 

import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; //導入依賴的package包/類
public static void main(String[] args) throws Exception {
	Properties properties = new Properties();
	properties.setProperty("bootstrap.servers", "localhost:9092");
	properties.setProperty("zookeeper.connect", "localhost:2181");
	properties.setProperty("group.id", "test");
	properties.setProperty("auto.offset.reset", "latest");
	FlinkKafkaConsumer08<DeviceEvent> flinkKafkaConsumer08 = new FlinkKafkaConsumer08<>("device-data",
			new DeviceSchema(), properties);

	StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
	DataStream<DeviceEvent> messageStream = env.addSource(flinkKafkaConsumer08);
	
	Map<String, String> config = new HashMap<>();
	config.put("cluster.name", "my-application");
	// This instructs the sink to emit after every element, otherwise they would be buffered
	config.put("bulk.flush.max.actions", "1");

	List<InetSocketAddress> transportAddresses = new ArrayList<>();
	transportAddresses.add(new InetSocketAddress(InetAddress.getByName("127.0.0.1"), 9300));

	messageStream.addSink(new ElasticsearchSink<DeviceEvent>(config, transportAddresses, new ESSink()));
	env.execute();
}
 

import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; //導入依賴的package包/類
public static void main(String... args) throws Exception {

        final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        DataStream<WikipediaEditEvent> edits = env.addSource(new WikipediaEditsSource());

        edits
            .timeWindowAll(Time.minutes(1))
            .apply(new AllWindowFunction<WikipediaEditEvent, Tuple3<Date, Long, Long>, TimeWindow>() {
                @Override
                public void apply(TimeWindow timeWindow, Iterable<WikipediaEditEvent> iterable, Collector<Tuple3<Date, Long, Long>> collector) throws Exception {
                    long count = 0;
                    long bytesChanged = 0;

                    for (WikipediaEditEvent event : iterable) {
                        count++;
                        bytesChanged += event.getByteDiff();
                    }

                    collector.collect(new Tuple3<>(new Date(timeWindow.getEnd()), count, bytesChanged));
                }
            })
            .print();


        env.execute();
    }
 

import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; //導入依賴的package包/類
@SuppressWarnings("Convert2Lambda")
public static void main(String[] args) throws Exception {
    StreamExecutionEnvironment streamExecutionEnvironment = StreamExecutionEnvironment.getExecutionEnvironment();
    DataStream<String> dataStream = streamExecutionEnvironment.readTextFile("file:///tmp/flink-esper-input");
    
    EsperStream<String> esperStream = Esper.pattern(dataStream, "select bytes from String");

    DataStream<String> result = esperStream.select(new EsperSelectFunction<String>() {
        private static final long serialVersionUID = 7093943872082195786L;

        @Override
        public String select(EventBean eventBean) throws Exception {
            return new String((byte[]) eventBean.get("bytes"));
        }
    });

    result.writeAsText("file:///tmp/flink-esper-output");

    streamExecutionEnvironment.execute("Simple Flink Esper Example");
}
 

import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; //導入依賴的package包/類
public static void main(String[] args) throws IOException {
  StreamExecutionEnvironment execEnv = StreamExecutionEnvironment.createLocalEnvironment();
  StreamTableEnvironment env = StreamTableEnvironment.getTableEnvironment(execEnv);
  execEnv.setStreamTimeCharacteristic(TimeCharacteristic.EventTime);
  CompilationResult res = new CompilationResult();

  try {
    JobDescriptor job = getJobConf(System.in);
    res.jobGraph(new JobCompiler(env, job).getJobGraph());
  } catch (Throwable e) {
    res.remoteThrowable(e);
  }

  try (OutputStream out = chooseOutputStream(args)) {
    out.write(res.serialize());
  }
}
 

import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; //導入依賴的package包/類
public static void main(String[] args) throws Exception {

        final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        env.setParallelism(4);

        final Hashtable<String, String> jmsEnv = new Hashtable<>();
        jmsEnv.put(InitialContext.INITIAL_CONTEXT_FACTORY, "com.solacesystems.jndi.SolJNDIInitialContextFactory");
        jmsEnv.put(InitialContext.PROVIDER_URL, "smf://192.168.56.101");
        jmsEnv.put(Context.SECURITY_PRINCIPAL, "[email protected]_vpn");
        jmsEnv.put(Context.SECURITY_CREDENTIALS, "password");

        env.addSource(new JMSTopicSource<String>(jmsEnv,
                "flink_cf",
                "flink/topic",
                new JMSTextTranslator()))
                .print();

        env.execute();
    }
 

import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; //導入依賴的package包/類
public static void main(String[] args) throws Exception {

        final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        env.setParallelism(4);

        final Hashtable<String, String> jmsEnv = new Hashtable<>();
        jmsEnv.put(InitialContext.INITIAL_CONTEXT_FACTORY, "com.solacesystems.jndi.SolJNDIInitialContextFactory");
        jmsEnv.put(InitialContext.PROVIDER_URL, "smf://192.168.56.101");
        jmsEnv.put(Context.SECURITY_PRINCIPAL, "[email protected]_vpn");
        jmsEnv.put(Context.SECURITY_CREDENTIALS, "password");

        env.addSource(new JMSQueueSource<String>(jmsEnv,
                "flink_cf",
                "flink_queue",
                new JMSTextTranslator()))
                .print();

        env.execute();
    }
 

import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; //導入依賴的package包/類
@Test
public void testEventTimeOrderedWriter() throws Exception {
    StreamExecutionEnvironment execEnv = StreamExecutionEnvironment.createLocalEnvironment();

    String streamName = "testEventTimeOrderedWriter";
    SETUP_UTILS.createTestStream(streamName, 1);

    DataStreamSource<Integer> dataStream = execEnv
            .addSource(new IntegerGeneratingSource(false, EVENT_COUNT_PER_SOURCE));

    FlinkPravegaWriter<Integer> pravegaSink = new FlinkPravegaWriter<>(
            SETUP_UTILS.getControllerUri(),
            SETUP_UTILS.getScope(),
            streamName,
            new IntSerializer(),
            event -> "fixedkey");

    FlinkPravegaUtils.writeToPravegaInEventTimeOrder(dataStream, pravegaSink, 1);
    Assert.assertNotNull(execEnv.getExecutionPlan());
}
 

import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; //導入依賴的package包/類
public static void main(String[] args) throws Exception {
  // set up the execution environment
  final StreamExecutionEnvironment env = new StreamExecutionEnvBuilder().build();

  // Get the json config for parsing the raw input stream
  String parsingConfig = AppUtils.getParsingJsonConfig();

  KeyedStream<Tuple3<String, Long, String>, Tuple> kaydRawMessagesStream =
      setupKayedRawMessagesStream(env, parsingConfig);

  String outputStreamTopicName = configs.getStringProp("inputStreamTopicName");
  double streamDelayScale = configs.getDoubleProp("streamDelayScale");
  Properties producerProps = AppUtils.getKafkaProducerProperties();

  // replay the stream
  kaydRawMessagesStream.map(new StreamPlayer(streamDelayScale, outputStreamTopicName,
      producerProps)).setParallelism(1);

  // execute program
  env.execute("datAcron In-Situ Processing AIS Message Stream Simulator"
      + AppUtils.getAppVersion());
}