flink datasource

code/Flink/flink-time-watermark/src/main/java/com/heibaiying/SampleJob.java

@@ -0,0 +1,27 @@
+package com.heibaiying;
+
+import org.apache.flink.api.common.functions.FlatMapFunction;
+import org.apache.flink.api.java.tuple.Tuple2;
+import org.apache.flink.streaming.api.datastream.DataStreamSource;
+import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
+import org.apache.flink.streaming.api.windowing.time.Time;
+import org.apache.flink.util.Collector;
+
+public class SampleJob {
+
+    public static void main(String[] args) throws Exception {
+
+        final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
+        DataStreamSource<String> streamSource = env.socketTextStream("192.168.200.229", 9999, "\n", 3);
+        streamSource.flatMap(new FlatMapFunction<String, Tuple2<String, Long>>() {
+            @Override
+            public void flatMap(String value, Collector<Tuple2<String, Long>> out) throws Exception {
+                String[] words = value.split("\t");
+                for (String word : words) {
+                    out.collect(new Tuple2<>(word, 1L));
+                }
+            }
+        }).keyBy(0).timeWindow(Time.seconds(3)).sum(1).print();
+        env.execute("Flink Streaming");
+    }
+}

code/Flink/flink-time-watermark/src/main/resources/log4j.properties

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+################################################################################
+#  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.
+################################################################################
+
+log4j.rootLogger=INFO, console
+
+log4j.appender.console=org.apache.log4j.ConsoleAppender
+log4j.appender.console.layout=org.apache.log4j.PatternLayout
+log4j.appender.console.layout.ConversionPattern=%d{HH:mm:ss,SSS} %-5p %-60c %x - %m%n