fetcher.hpp

Go to the documentation of this file.

// 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.

#ifndef __MESOS_URI_FETCHER_HPP__
#define __MESOS_URI_FETCHER_HPP__

#include <set>
#include <string>
#include <vector>

#include <mesos/mesos.hpp>

#include <process/future.hpp>
#include <process/owned.hpp>
#include <process/shared.hpp>

#include <stout/hashmap.hpp>
#include <stout/nothing.hpp>

#include <mesos/uri/uri.hpp>

namespace mesos {
namespace uri {


class Fetcher
{
public:
  class Plugin
  {
  public:
    virtual ~Plugin() {}

    virtual std::set<std::string> schemes() const = 0;

    virtual std::string name() const = 0;

    // TODO(gilbert): Change the parameter 'data' as a hashmap
    // of <string, Secret::Value>, and update the comment.
    virtual process::Future<Nothing> fetch(
        const URI& uri,
        const std::string& directory,
        const Option<std::string>& data = None(),
        const Option<std::string>& outputFileName = None()) const = 0;
  };

  Fetcher(const std::vector<process::Owned<Plugin>>& plugins);

  // TODO(jieyu): Consider using 'Path' for 'directory' here.
  process::Future<Nothing> fetch(
      const URI& uri,
      const std::string& directory,
      const Option<std::string>& data = None(),
      const Option<std::string>& outputFileName = None()) const;

  process::Future<Nothing> fetch(
      const URI& uri,
      const std::string& directory,
      const std::string& name,
      const Option<std::string>& data = None(),
      const Option<std::string>& outputFileName = None()) const;

private:
  Fetcher(const Fetcher&) = delete; // Not copyable.
  Fetcher& operator=(const Fetcher&) = delete; // Not assignable.

  hashmap<std::string, process::Shared<Plugin>> pluginsByName;
  hashmap<std::string, process::Shared<Plugin>> pluginsByScheme;
};

} // namespace uri {
} // namespace mesos {

#endif // __MESOS_URI_FETCHER_HPP__