Use maven wrapper instead of plain maven

Signed-off-by: Dan Siwiec <daniel.siwiec@gmail.com>

Author: danielsiwiec

.mvn/wrapper/MavenWrapperDownloader.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright 2007-present the original author or authors.
+ *
+ * Licensed 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.
+ */
+import java.net.*;
+import java.io.*;
+import java.nio.channels.*;
+import java.util.Properties;
+
+public class MavenWrapperDownloader {
+
+    private static final String WRAPPER_VERSION = "0.5.6";
+    /**
+     * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
+     */
+    private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/"
+        + WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar";
+
+    /**
+     * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
+     * use instead of the default one.
+     */
+    private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
+            ".mvn/wrapper/maven-wrapper.properties";
+
+    /**
+     * Path where the maven-wrapper.jar will be saved to.
+     */
+    private static final String MAVEN_WRAPPER_JAR_PATH =
+            ".mvn/wrapper/maven-wrapper.jar";
+
+    /**
+     * Name of the property which should be used to override the default download url for the wrapper.
+     */
+    private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
+
+    public static void main(String args[]) {
+        System.out.println("- Downloader started");
+        File baseDirectory = new File(args[0]);
+        System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
+
+        // If the maven-wrapper.properties exists, read it and check if it contains a custom
+        // wrapperUrl parameter.
+        File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
+        String url = DEFAULT_DOWNLOAD_URL;
+        if(mavenWrapperPropertyFile.exists()) {
+            FileInputStream mavenWrapperPropertyFileInputStream = null;
+            try {
+                mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
+                Properties mavenWrapperProperties = new Properties();
+                mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
+                url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
+            } catch (IOException e) {
+                System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
+            } finally {
+                try {
+                    if(mavenWrapperPropertyFileInputStream != null) {
+                        mavenWrapperPropertyFileInputStream.close();
+                    }
+                } catch (IOException e) {
+                    // Ignore ...
+                }
+            }
+        }
+        System.out.println("- Downloading from: " + url);
+
+        File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
+        if(!outputFile.getParentFile().exists()) {
+            if(!outputFile.getParentFile().mkdirs()) {
+                System.out.println(
+                        "- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'");
+            }
+        }
+        System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
+        try {
+            downloadFileFromURL(url, outputFile);
+            System.out.println("Done");
+            System.exit(0);
+        } catch (Throwable e) {
+            System.out.println("- Error downloading");
+            e.printStackTrace();
+            System.exit(1);
+        }
+    }
+
+    private static void downloadFileFromURL(String urlString, File destination) throws Exception {
+        if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
+            String username = System.getenv("MVNW_USERNAME");
+            char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
+            Authenticator.setDefault(new Authenticator() {
+                @Override
+                protected PasswordAuthentication getPasswordAuthentication() {
+                    return new PasswordAuthentication(username, password);
+                }
+            });
+        }
+        URL website = new URL(urlString);
+        ReadableByteChannel rbc;
+        rbc = Channels.newChannel(website.openStream());
+        FileOutputStream fos = new FileOutputStream(destination);
+        fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
+        fos.close();
+        rbc.close();
+    }
+
+}

.mvn/wrapper/maven-wrapper.jar

@@ -0,0 +1,2 @@
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.3/apache-maven-3.6.3-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar

.mvn/wrapper/maven-wrapper.properties

@@ -30,7 +30,7 @@ Automatically format the code to conform the style guide by:
 
 ```sh
 # formats all code in the feast-java repository
-mvn spotless:apply
+./mvnw spotless:apply
 ```
 
 > If you're using IntelliJ, you can import these [code style settings](https://github.com/google/styleguide/blob/gh-pages/intellij-java-google-style.xml)
@@ -78,7 +78,7 @@ Feast Core is configured using it's [application.yml](https://docs.feast.dev/ref
 ### Building and Running
 1. Build / Compile Feast Core with Maven to produce an executable Feast Core JAR
 ```sh
-mvn package -pl core --also-make -Dmaven.test.skip=true 
+./mvnw package -pl core --also-make -Dmaven.test.skip=true 
 ```
 
 2. Run Feast Core using the built JAR:
@@ -91,9 +91,9 @@ java -jar core/target/feast-core-X.X.X-exec.jar
 Unit & Integration Tests can be used to verify functionality:
 ```sh
 # run unit tests
-mvn test -pl core --also-make
+./mvnw test -pl core --also-make
 # run integration tests
-mvn verify -pl core --also-make
+./mvnw verify -pl core --also-make
 ```
 
 ## Feast Serving
@@ -115,7 +115,7 @@ Feast Serving is configured using it's [application.yml](https://docs.feast.dev/
 ### Building and Running
 1. Build / Compile Feast Serving with Maven to produce an executable Feast Serving JAR
 ```sh
-mvn package -pl serving --also-make -Dmaven.test.skip=true 
+./mvnw package -pl serving --also-make -Dmaven.test.skip=true 
 
 2. Run Feast Serving using the built JAR:
 ```sh
@@ -127,9 +127,9 @@ java -jar serving/target/feast-serving-X.X.X-exec.jar
 Unit & Integration Tests can be used to verify functionality:
 ```sh
 # run unit tests
-mvn test -pl serving --also-make
+./mvnw test -pl serving --also-make
 # run integration tests
-mvn verify -pl serving --also-make
+./mvnw verify -pl serving --also-make
 ```
 
 ## Feast Java Client
@@ -147,12 +147,12 @@ Feast Java Client is [configured as code](https://docs.feast.dev/v/master/refere
 1. Build / Compile Feast Java Client with Maven:
 
 ```sh
-mvn package -pl sdk/java --also-make -Dmaven.test.skip=true
+./mvnw package -pl sdk/java --also-make -Dmaven.test.skip=true
 ```
 
 ### Unit Tests
 Unit Tests can be used to verify functionality:
 
 ```sh
-mvn package -pl sdk/java test --also-make
+./mvnw package -pl sdk/java test --also-make
 ```