HBASE-24115 Relocate test-only REST "client" from src/ to test/ and mark Private (#1434)

Signed-off-by: Sean Busbey <busbey@apache.org>
Signed-off-by: Zach York <zyork@apache.org>
Signed-off-by: Reid Chan <reidchan@apache.org>
Signed-off-by: Viraj Jasani <vjasani@apache.org>
Signed-off-by: Josh Elser <elserj@apache.org>

hbase-examples/src/main/java/org/apache/hadoop/hbase/rest/RESTDemoClient.java

@@ -1,145 +0,0 @@
-/**
- * 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.hadoop.hbase.rest;
-
-import com.google.common.base.Preconditions;
-
-import java.security.PrivilegedExceptionAction;
-import java.util.HashMap;
-import java.util.Map;
-
-import javax.security.auth.Subject;
-import javax.security.auth.login.AppConfigurationEntry;
-import javax.security.auth.login.Configuration;
-import javax.security.auth.login.LoginContext;
-
-import org.apache.hadoop.hbase.Cell;
-import org.apache.hadoop.hbase.CellUtil;
-import org.apache.hadoop.hbase.HBaseConfiguration;
-import org.apache.hadoop.hbase.classification.InterfaceAudience;
-import org.apache.hadoop.hbase.client.Get;
-import org.apache.hadoop.hbase.client.Put;
-import org.apache.hadoop.hbase.client.Result;
-import org.apache.hadoop.hbase.rest.client.Client;
-import org.apache.hadoop.hbase.rest.client.Cluster;
-import org.apache.hadoop.hbase.rest.client.RemoteHTable;
-import org.apache.hadoop.hbase.util.Bytes;
-
-@InterfaceAudience.Private
-public class RESTDemoClient {
-
-  private static String host = "localhost";
-  private static int port = 9090;
-  private static boolean secure = false;
-  private static org.apache.hadoop.conf.Configuration conf = null;
-
-  public static void main(String[] args) throws Exception {
-    System.out.println("REST Demo");
-    System.out.println("Usage: RESTDemoClient [host=localhost] [port=9090] [secure=false]");
-    System.out.println("This demo assumes you have a table called \"example\""
-        + " with a column family called \"family1\"");
-
-    // use passed in arguments instead of defaults
-    if (args.length >= 1) {
-      host = args[0];
-    }
-    if (args.length >= 2) {
-      port = Integer.parseInt(args[1]);
-    }
-    conf = HBaseConfiguration.create();
-    String principal = conf.get(Constants.REST_KERBEROS_PRINCIPAL);
-    if (principal != null) {
-      secure = true;
-    }
-    if (args.length >= 3) {
-      secure = Boolean.parseBoolean(args[2]);
-    }
-
-    final RESTDemoClient client = new RESTDemoClient();
-    Subject.doAs(getSubject(), new PrivilegedExceptionAction<Void>() {
-      @Override
-      public Void run() throws Exception {
-        client.run();
-        return null;
-      }
-    });
-  }
-
-  public void run() throws Exception {
-    Cluster cluster = new Cluster();
-    cluster.add(host, port);
-    Client restClient = new Client(cluster, conf.getBoolean(Constants.REST_SSL_ENABLED, false));
-    try (RemoteHTable remoteTable = new RemoteHTable(restClient, conf, "example")) {
-      // Write data to the table
-      String rowKey = "row1";
-      Put p = new Put(rowKey.getBytes());
-      p.addColumn("family1".getBytes(), "qualifier1".getBytes(), "value1".getBytes());
-      remoteTable.put(p);
-
-      // Get the data from the table
-      Get g = new Get(rowKey.getBytes());
-      Result result = remoteTable.get(g);
-
-      Preconditions.checkArgument(result != null,
-        Bytes.toString(remoteTable.getTableName()) + " should have a row with key as " + rowKey);
-      System.out.println("row = " + new String(result.getRow()));
-      for (Cell cell : result.rawCells()) {
-        System.out.print("family = " + Bytes.toString(CellUtil.cloneFamily(cell)) + "\t");
-        System.out.print("qualifier = " + Bytes.toString(CellUtil.cloneQualifier(cell)) + "\t");
-        System.out.print("value = " + Bytes.toString(CellUtil.cloneValue(cell)) + "\t");
-        System.out.println("timestamp = " + Long.toString(cell.getTimestamp()));
-      }
-    }
-  }
-
-  static Subject getSubject() throws Exception {
-    if (!secure) {
-      return new Subject();
-    }
-
-    /*
-     * To authenticate the demo client, kinit should be invoked ahead. Here we try to get the
-     * Kerberos credential from the ticket cache.
-     */
-    LoginContext context = new LoginContext("", new Subject(), null, new Configuration() {
-      @Override
-      public AppConfigurationEntry[] getAppConfigurationEntry(String name) {
-        Map<String, String> options = new HashMap<>();
-        options.put("useKeyTab", "false");
-        options.put("storeKey", "false");
-        options.put("doNotPrompt", "true");
-        options.put("useTicketCache", "true");
-        options.put("renewTGT", "true");
-        options.put("refreshKrb5Config", "true");
-        options.put("isInitiator", "true");
-        String ticketCache = System.getenv("KRB5CCNAME");
-        if (ticketCache != null) {
-          options.put("ticketCache", ticketCache);
-        }
-        options.put("debug", "true");
-
-        return new AppConfigurationEntry[] {
-          new AppConfigurationEntry("com.sun.security.auth.module.Krb5LoginModule",
-                AppConfigurationEntry.LoginModuleControlFlag.REQUIRED, options) };
-      }
-    });
-    context.login();
-    return context.getSubject();
-  }
-}