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Client DSL shell.

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/**
 * 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.gateway.shell.hdfs;

import org.apache.hadoop.gateway.shell.AbstractRequest;
import org.apache.hadoop.gateway.shell.BasicResponse;
import org.apache.hadoop.gateway.shell.Hadoop;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.utils.URIBuilder;

import java.util.concurrent.Callable;

class Ls {

  static class Request extends AbstractRequest {

    String dir;

    Request( Hadoop session ) {
      super( session );
    }

    public Request dir( String dir ) {
      this.dir = dir;
      return this;
    }

    protected Callable callable() {
      return new Callable() {
        @Override
        public Response call() throws Exception {
          URIBuilder uri = uri( Hdfs.SERVICE_PATH, dir );
          addQueryParam( uri, "op", "LISTSTATUS" );
          HttpGet get = new HttpGet( uri.build() );
          return new Response( execute( get ) );
        }
      };
    }

  }

  static class Response extends BasicResponse {

    Response( HttpResponse response ) {
      super( response );
    }

  }

}