/**
 * 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.hdfs.web;

import java.net.URI;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.MiniDFSNNTopology;
import org.apache.hadoop.hdfs.server.namenode.ha.HATestUtil;
import org.junit.Assert;
import org.junit.Test;

/** Test whether WebHDFS can connect to an HA cluster */
public class TestWebHDFSForHA {

  private static final String LOGICAL_NAME = "minidfs";

  @Test
  public void test() throws Exception {
    Configuration conf = new Configuration();
    conf.setBoolean(DFSConfigKeys.DFS_WEBHDFS_ENABLED_KEY, true);

    MiniDFSNNTopology topo = new MiniDFSNNTopology()
        .addNameservice(new MiniDFSNNTopology.NSConf(LOGICAL_NAME).addNN(
            new MiniDFSNNTopology.NNConf("nn1")).addNN(
            new MiniDFSNNTopology.NNConf("nn2")));

    MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).nnTopology(topo)
        .numDataNodes(3).build();

    HATestUtil.setFailoverConfigurations(cluster, conf, LOGICAL_NAME);

    FileSystem fs = null;
    try {
      cluster.waitActive();

      final String uri = WebHdfsFileSystem.SCHEME + "://" + LOGICAL_NAME;
      fs = (WebHdfsFileSystem) FileSystem.get(new URI(uri), conf);
      cluster.transitionToActive(0);

      final Path dir = new Path("/test");
      Assert.assertTrue(fs.mkdirs(dir));

      cluster.shutdownNameNode(0);
      cluster.transitionToActive(1);

      final Path dir2 = new Path("/test2");
      Assert.assertTrue(fs.mkdirs(dir2));

    } finally {
      if (fs != null) {
        fs.close();
      }
      cluster.shutdown();
    }
  }
}