Initial commit

Author: Mark Powers

.gitattributes

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+# Auto detect text files and perform LF normalization
+* text=auto

9781484251935.jpg

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+# Contributing to Apress Source Code
+
+Copyright for Apress source code belongs to the author(s). However, under fair use you are encouraged to fork and contribute minor corrections and updates for the benefit of the author(s) and other readers.
+
+## How to Contribute
+
+1. Make sure you have a GitHub account.
+2. Fork the repository for the relevant book.
+3. Create a new branch on which to make your change, e.g. 
+`git checkout -b my_code_contribution`
+4. Commit your change. Include a commit message describing the correction. Please note that if your commit message is not clear, the correction will not be accepted.
+5. Submit a pull request.
+
+Thank you for your contribution!

Contributing.md

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+Freeware License, some rights reserved
+
+Copyright (c) 2020 P.J. McNerney
+
+Permission is hereby granted, free of charge, to anyone obtaining a copy 
+of this software and associated documentation files (the "Software"), 
+to work with the Software within the limits of freeware distribution and fair use. 
+This includes the rights to use, copy, and modify the Software for personal use. 
+Users are also allowed and encouraged to submit corrections and modifications 
+to the Software for the benefit of other users.
+
+It is not allowed to reuse,  modify, or redistribute the Software for 
+commercial use in any way, or for a user’s educational materials such as books 
+or blog articles without prior permission from the copyright holder. 
+
+The above copyright notice and this permission notice need to 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 OR APRESS 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.
+
+

LICENSE.txt

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+# Apress Source Code
+
+This repository accompanies [*Beginning Bazel*](https://www.apress.com/9781484251935) by P.J. McNerney (Apress, 2020).
+
+[comment]: #cover
+![Cover image](9781484251935.jpg)
+
+Download the files as a zip using the green button, or clone the repository to your machine using Git.
+
+## Releases
+
+Release v1.0 corresponds to the code in the published book, without corrections or updates.
+
+## Contributions
+
+See the file Contributing.md for more information on how you can contribute to this repository.

README.md

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+java_binary(
+    name = "HelloWorld",
+    srcs = [
+        "HelloWorld.java",
+    ],
+    deps = [
+        ":LibraryExample"
+    ]
+)
+
+java_library(
+    name = "LibraryExample",
+    srcs = ["IntMultiplier.java"],
+)
+
+java_test(
+    name = "LibraryExampleTest",
+    srcs = [
+        "IntMultiplierTest.java",
+    ],
+    deps = [
+        ":LibraryExample",
+        "//third_party:junit4",
+    ],
+    test_class = "IntMultiplierTest",
+)

chapter_03/WORKSPACE

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+
+public class HelloWorld {
+    public static void main(String[] args) {
+        System.out.println("Hello, World!");
+        IntMultiplier im = new IntMultiplier(3, 4);
+        System.out.println(im.GetProduct());
+    }
+}

chapter_03/src/BUILD

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+public class IntMultiplier {
+    private int a;
+    private int b;
+
+    public IntMultiplier(int a, int b) {
+        this.a = a;
+        this.b = b;
+    }
+
+    public int GetProduct() {
+        return a * b;
+    }
+}

chapter_03/src/HelloWorld.java

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+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+public class IntMultiplierTest {
+
+    @Test
+    public void testIntMultiplier() throws Exception {
+        IntMultiplier im = new IntMultiplier(3, 4);
+        assertEquals(12, im.GetProduct());
+    }
+
+    @Test
+    public void testIntMultiplier2() throws Exception {
+        IntMultiplier im = new IntMultiplier(4, 5);
+        assertEquals(20, im.GetProduct());
+    }
+
+}

chapter_03/src/IntMultiplier.java

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+package(default_visibility = ["//visibility:public"])
+
+java_import(
+    name = "junit4",
+    jars = [
+        "hamcrest/hamcrest-core-1.3.jar",
+        "junit/junit-4.12.jar",
+    ]
+)

chapter_03/src/IntMultiplierTest.java

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+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+http_archive(
+    name = "io_bazel_rules_go",
+    urls = ["https://github.com/bazelbuild/rules_go/releases/download/v0.19.5/rules_go-v0.19.5.tar.gz"],
+)
+load("@io_bazel_rules_go//go:deps.bzl", "go_rules_dependencies", "go_register_toolchains")
+go_rules_dependencies()
+go_register_toolchains()

chapter_03/third_party/BUILD

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+load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library", "go_test")
+
+java_binary(
+    name = "HelloWorld",
+    srcs = [
+        "HelloWorld.java",
+    ],
+    deps = [
+        ":LibraryExample"
+    ]
+)
+
+java_library(
+    name = "LibraryExample",
+    srcs = ["IntMultiplier.java"],
+)
+
+java_test(
+    name = "LibraryExampleTest",
+    srcs = [
+        "IntMultiplierTest.java",
+    ],
+    deps = [
+        ":LibraryExample",
+        "//third_party:junit4",
+    ],
+    test_class = "IntMultiplierTest",
+)
+
+go_binary(
+    name = "hello_world_go",
+    srcs = [
+        "hello_world.go",
+    ],
+)

chapter_03/third_party/hamcrest/hamcrest-core-1.3.jar

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+
+public class HelloWorld {
+    public static void main(String[] args) {
+        System.out.println("Hello, World!");
+        IntMultiplier im = new IntMultiplier(3, 4);
+        System.out.println(im.GetProduct());
+    }
+}

chapter_03/third_party/junit/junit-4.12.jar

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+public class IntMultiplier {
+    private int a;
+    private int b;
+
+    public IntMultiplier(int a, int b) {
+        this.a = a;
+        this.b = b;
+    }
+
+    public int GetProduct() {
+        return a * b;
+    }
+}

chapter_04/WORKSPACE

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+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+public class IntMultiplierTest {
+
+    @Test
+    public void testIntMultiplier() throws Exception {
+        IntMultiplier im = new IntMultiplier(3, 4);
+        assertEquals(12, im.GetProduct());
+    }
+
+    @Test
+    public void testIntMultiplier2() throws Exception {
+        IntMultiplier im = new IntMultiplier(4, 5);
+        assertEquals(20, im.GetProduct());
+    }
+
+}

chapter_04/src/BUILD

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+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("Hello, World!")
+}

chapter_04/src/HelloWorld.java

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+package(default_visibility = ["//visibility:public"])
+
+java_import(
+    name = "junit4",
+    jars = [
+        "hamcrest/hamcrest-core-1.3.jar",
+        "junit/junit-4.12.jar",
+    ]
+)

chapter_04/src/IntMultiplier.java

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+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+http_archive(
+    name = "io_bazel_rules_go",
+    urls = ["https://github.com/bazelbuild/rules_go/releases/download/v0.19.5/rules_go-v0.19.5.tar.gz"],
+)
+load("@io_bazel_rules_go//go:deps.bzl", "go_rules_dependencies", "go_register_toolchains")
+go_rules_dependencies()
+go_register_toolchains()

chapter_04/src/IntMultiplierTest.java

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+load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library")
+
+go_binary(
+    name = "echo_server",
+    srcs = ["echo_server.go"],
+    deps = [":transmission_object_go"],
+)
+
+go_library(
+    name = "transmission_object_go",
+    srcs = ["transmission_object.go"],
+    importpath = "transmission_object",
+)
+
+java_library(
+    name = "transmission_object_java",
+    srcs = ["TransmissionObject.java"],
+)
+
+java_binary(
+    name = "echo_client",
+    srcs = ["EchoClient.java"],
+    main_class = "EchoClient",
+    deps = [
+        ":transmission_object_java",
+        "//third_party:gson",
+    ]
+)

chapter_04/src/hello_world.go

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+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.io.PrintWriter;
+import java.net.Socket;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+
+public class EchoClient {
+    private static final String kHostName = "localhost";
+    private static final int kPortNumber = 1234;
+
+    public static void main (String args[]) {
+        System.out.println("Spinning up the Echo Client in Java...");
+        try {
+            final Socket socketToServer = new Socket(kHostName, kPortNumber);
+            final BufferedReader inputFromServer = new BufferedReader(new InputStreamReader(socketToServer.getInputStream()));
+            final BufferedReader commandLineInput = new BufferedReader(new InputStreamReader(System.in));
+
+            System.out.println("Waiting on input from the user...");
+            final String inputFromUser = commandLineInput.readLine();
+            if (inputFromUser != null) {
+                System.out.println("Received by Java: " + inputFromUser);
+
+                TransmissionObject transmissionObject = new TransmissionObject();
+                transmissionObject.message = inputFromUser;
+                transmissionObject.value = 3.145f;
+                GsonBuilder builder = new GsonBuilder();
+                Gson gson = builder.create();        
+                final PrintWriter outputToServer = new PrintWriter(socketToServer.getOutputStream(), true);
+                outputToServer.println(gson.toJson(transmissionObject));
+                System.out.println(inputFromServer.readLine());                
+            }
+            socketToServer.close();
+        } catch (Exception e) {
+            System.err.println("Error: " + e);
+        }
+    }
+}

chapter_04/third_party/BUILD

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+public class TransmissionObject {
+    public String message;
+    public float value;
+}

chapter_04/third_party/hamcrest/hamcrest-core-1.3.jar

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+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"net"
+	"transmission_object"
+)
+
+func main() {
+	log.Println("Spinning up the Echo Server in Go...")
+	listen, error := net.Listen("tcp", ":1234")
+	if error != nil {
+		log.Panicln("Unable to listen: " + error.Error())
+	}
+	defer listen.Close()
+
+	connection, error := listen.Accept()
+	if error != nil {
+		log.Panicln("Cannot accept a connection! Error: " + error.Error())
+	}
+
+	log.Println("Receiving on a new connection")
+	defer connection.Close()
+	defer log.Println("Connection now closed.")
+
+	buffer := make([]byte, 2048)
+	size, error := connection.Read(buffer)
+	if error != nil {
+		log.Panicln("Unable to read from the buffer! Error: " + error.Error())
+	}
+	data := buffer[:size]
+	var transmissionObject transmission_object.TransmissionObject
+	error = json.Unmarshal(data, &transmissionObject)
+	if error != nil {
+		log.Panicln("Unable to unmarshal the buffer! Error: " + error.Error())
+	}
+
+	log.Println("Message = " + transmissionObject.Message)
+	log.Println("Value = " + fmt.Sprintf("%f", transmissionObject.Value))
+
+	transmissionObject.Message = "Echoed from Go: " + transmissionObject.Message
+	transmissionObject.Value = 2 * transmissionObject.Value
+
+	message, error := json.Marshal(transmissionObject)
+	if error != nil {
+		log.Panicln("Unable to marshall the object! Error: " + error.Error())
+	}
+	connection.Write(message)
+}