Initial Commit for the Starting Point of Calm Hub (#709)

* Initial commit of CALM Hub prototype to core repo - a few tweaks and doc fixes to add

* Add missing files, update README.md with more details

.gitignore

@@ -23,4 +23,6 @@ node_modules/
 **/out/
 **/dependency-check-report/
 
-**/tsconfig.tsbuildinfo
+**/tsconfig.tsbuildinfo
+
+!/.mvn/wrapper/maven-wrapper.jar

.mvn/wrapper/MavenWrapperDownloader.java

@@ -0,0 +1,142 @@
+/*
+ * 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.
+ */
+
+import java.net.*;
+import java.io.*;
+import java.nio.channels.*;
+import java.util.Properties;
+
+public class MavenWrapperDownloader
+{
+    private static final String WRAPPER_VERSION = "3.1.1";
+
+    /**
+     * 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/org/apache/maven/wrapper/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.properties

@@ -0,0 +1,18 @@
+# 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.
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.6/apache-maven-3.8.6-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.1/maven-wrapper-3.1.1.jar

calm-hub/.dockerignore

@@ -0,0 +1,14 @@
+# Ignore everything
+*
+
+# Allow the Maven Wrapper and build files
+!pom.xml
+!.mvn/
+!mvnw
+!src
+
+# Allow the target directory for the final build
+!target/*-runner
+!target/*-runner.jar
+!target/lib/*
+!target/quarkus-app/*