Use java to download external dependecies

build-tools/pom.xml

@@ -1,5 +1,7 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
-<!--
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <!--
   ~ 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.
@@ -24,4 +26,48 @@
     <artifactId>zeppelin</artifactId>
     <version>0.12.0-SNAPSHOT</version>
   </parent>
-</project>
+  <properties>
+    <progressbar.version>0.9.5</progressbar.version>
+  </properties>
+  <packaging>jar</packaging>
+  <dependencies>
+    <dependency>
+      <groupId>org.apache.commons</groupId>
+      <artifactId>commons-compress</artifactId>
+      <version>${commons.compress.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>commons-io</groupId>
+      <artifactId>commons-io</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>me.tongfei</groupId>
+      <artifactId>progressbar</artifactId>
+      <version>${progressbar.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-api</artifactId>
+    </dependency>
+
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-engine</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+        <groupId>org.apache.logging.log4j</groupId>
+        <artifactId>log4j-slf4j-impl</artifactId>
+        <version>${log4j2.version}</version>
+        <scope>test</scope>
+    </dependency>
+  </dependencies>
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-jar-plugin</artifactId>
+      </plugin>
+    </plugins>
+  </build>
+</project>

build-tools/src/main/java/org/apache/zeppelin/build/tools/DownloadRequest.java

@@ -0,0 +1,77 @@
+/*
+ * 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 org.apache.zeppelin.build.tools;
+
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.util.Optional;
+
+public class DownloadRequest {
+  private final URL url;
+  private final Optional<URL> alternativeUrl;
+  private final int retries;
+
+  public static final int DEFAULT_RETRIES = 3;
+
+  public DownloadRequest(String url, int retries) throws MalformedURLException {
+    this(url, null, retries);
+  }
+
+  public DownloadRequest(String url, String alternativeUrl) throws MalformedURLException {
+    this(url, alternativeUrl, DEFAULT_RETRIES);
+  }
+
+  public DownloadRequest(String url, String alternativeUrl, int retries)
+      throws MalformedURLException {
+    if (alternativeUrl != null) {
+      this.url = new URL(url);
+      this.alternativeUrl = Optional.of(new URL(alternativeUrl));
+      this.retries = retries;
+    } else {
+      this.url = new URL(url);
+      this.alternativeUrl = Optional.empty();
+      this.retries = retries;
+    }
+  }
+
+  public DownloadRequest(URL url, int retries) {
+    this(url, null, retries);
+  }
+
+  public DownloadRequest(URL url, URL alternativeUrl) {
+    this(url, alternativeUrl, DEFAULT_RETRIES);
+  }
+
+  public DownloadRequest(URL url, URL alternativeUrl, int retries) {
+    this.url = url;
+    this.alternativeUrl = Optional.of(alternativeUrl);
+    this.retries = retries;
+  }
+
+  public URL getUrl() {
+    return url;
+  }
+
+  public Optional<URL> getAlternativeUrl() {
+    return alternativeUrl;
+  }
+
+  public int getRetries() {
+    return retries;
+  }
+}