FirstCut++

FirstCut++

module/src/main/java/com/iluwatar/module/App.java

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+/**
+ * The MIT License Copyright (c) 2016 Amit Dixit
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
+ * associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
+ * NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.iluwatar.module;
+
+import java.io.FileNotFoundException;
+
+/**
+ * The Data Mapper (DM) is a layer of software that separates the in-memory
+ * objects from the database. Its responsibility is to transfer data between the
+ * two and also to isolate them from each other. With Data Mapper the in-memory
+ * objects needn't know even that there's a database present; they need no SQL
+ * interface code, and certainly no knowledge of the database schema. (The
+ * database schema is always ignorant of the objects that use it.) Since it's a
+ * form of Mapper , Data Mapper itself is even unknown to the domain layer.
+ * <p>
+ * The below example demonstrates basic CRUD operations: Create, Read, Update,
+ * and Delete.
+ * 
+ */
+public final class App {
+
+	private static final String OUTPUT_FILE = "output.txt";
+	private static final String ERROR_FILE = "error.txt";
+
+	public static FilePrinterModule filePrinterModule = null;
+
+	public static void prepare() throws FileNotFoundException {
+		filePrinterModule = FilePrinterModule.getSingleton();
+
+		filePrinterModule.prepare(OUTPUT_FILE, ERROR_FILE);
+	}
+
+	public static void unprepare() {
+		filePrinterModule.unprepare();
+	}
+
+	public static final void execute(final String... args) {
+		filePrinterModule.printString("Hello World");
+	}
+
+	/**
+	 * Program entry point.
+	 * 
+	 * @param args
+	 *            command line args.
+	 * @throws FileNotFoundException
+	 */
+	public static final void main(final String... args)
+			throws FileNotFoundException {
+		prepare();
+		execute(args);
+		unprepare();
+	}
+
+	private App() {
+	}
+}

module/src/main/java/com/iluwatar/module/FilePrinterModule.java

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+package com.iluwatar.module;
+
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.PrintStream;
+
+import org.apache.log4j.Logger;
+
+/**
+ * The MIT License Copyright (c) 2016 Amit Dixit
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+public final class FilePrinterModule {
+
+	private static final Logger logger = Logger
+			.getLogger(FilePrinterModule.class);
+
+	private static FilePrinterModule singleton = null;
+
+	public PrintStream output = null;
+	public PrintStream error = null;
+
+	private FilePrinterModule() {
+	}
+
+	public static final FilePrinterModule getSingleton() {
+
+		if (FilePrinterModule.singleton == null) {
+			FilePrinterModule.singleton = new FilePrinterModule();
+		}
+
+		return FilePrinterModule.singleton;
+	}
+
+	/**
+	 * 
+	 * @throws FileNotFoundException
+	 */
+	public final void prepare(final String outputFile, final String errorFile)
+			throws FileNotFoundException {
+
+		logger.debug("MainModule::prepare();");
+
+		this.output = new PrintStream(new FileOutputStream(outputFile));
+		this.error = new PrintStream(new FileOutputStream(errorFile));
+	}
+
+	/**
+	 * 
+	 */
+	public final void unprepare() {
+
+		if (this.output != null) {
+
+			this.output.flush();
+			this.output.close();
+		}
+
+		if (this.error != null) {
+
+			this.error.flush();
+			this.error.close();
+		}
+
+		logger.debug("MainModule::unprepare();");
+	}
+
+	/**
+	 * 
+	 * @param value
+	 */
+	public final void printString(final String value) {
+		this.output.print(value);
+	}
+
+	/**
+	 * 
+	 * @param value
+	 */
+	public final void printErrorString(final String value) {
+		this.error.print(value);
+	}
+}