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code/Flink/flink-basis-java/src/main/java/com/heibaiying/BatchJob.java

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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.
+ */
+
+package com.heibaiying;
+
+import org.apache.flink.api.java.ExecutionEnvironment;
+import org.apache.flink.api.java.operators.DataSource;
+
+/**
+ * Skeleton for a Flink Batch Job.
+ *
+ * <p>For a tutorial how to write a Flink batch application, check the
+ * tutorials and examples on the <a href="http://flink.apache.org/docs/stable/">Flink Website</a>.
+ *
+ * <p>To package your application into a JAR file for execution,
+ * change the main class in the POM.xml file to this class (simply search for 'mainClass')
+ * and run 'mvn clean package' on the command line.
+ */
+public class BatchJob {
+
+    public static void main(String[] args) throws Exception {
+
+        final String rootPath = "D:\\BigData-Notes\\code\\Flink\\flink-basis-java\\src\\main\\resources\\";
+        // set up the batch execution environment
+        final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
+
+        DataSource<String> readTextFile = env.readTextFile(rootPath + "log4j.properties");
+        readTextFile.print();
+    }
+}

code/Flink/flink-basis-java/src/main/java/com/heibaiying/StreamingJob.java

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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.
+ */
+
+package com.heibaiying;
+
+import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
+
+/**
+ * Skeleton for a Flink Streaming Job.
+ *
+ * <p>For a tutorial how to write a Flink streaming application, check the
+ * tutorials and examples on the <a href="http://flink.apache.org/docs/stable/">Flink Website</a>.
+ *
+ * <p>To package your application into a JAR file for execution, run
+ * 'mvn clean package' on the command line.
+ *
+ * <p>If you change the name of the main class (with the public static void main(String[] args))
+ * method, change the respective entry in the POM.xml file (simply search for 'mainClass').
+ */
+public class StreamingJob {
+
+	public static void main(String[] args) throws Exception {
+		// set up the streaming execution environment
+		final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
+
+		/*
+		 * Here, you can start creating your execution plan for Flink.
+		 *
+		 * Start with getting some data from the environment, like
+		 * 	env.readTextFile(textPath);
+		 *
+		 * then, transform the resulting DataStream<String> using operations
+		 * like
+		 * 	.filter()
+		 * 	.flatMap()
+		 * 	.join()
+		 * 	.coGroup()
+		 *
+		 * and many more.
+		 * Have a look at the programming guide for the Java API:
+		 *
+		 * http://flink.apache.org/docs/latest/apis/streaming/index.html
+		 *
+		 */
+
+		// execute program
+		env.execute("Flink Streaming Java API Skeleton");
+	}
+}