| // 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. |
| |
| #include <string> |
| |
| #include <stout/foreach.hpp> |
| #include <stout/lambda.hpp> |
| #include <stout/hashmap.hpp> |
| |
| #include "uri/fetcher.hpp" |
| |
| using std::string; |
| |
| using process::Failure; |
| using process::Future; |
| using process::Owned; |
| |
| namespace mesos { |
| namespace uri { |
| namespace fetcher { |
| |
| Try<Owned<Fetcher>> create(const Option<Flags>& _flags) |
| { |
| // Use the default flags if not specified. |
| Flags flags; |
| if (_flags.isSome()) { |
| flags = _flags.get(); |
| } |
| |
| // Load built-in plugins. |
| typedef lambda::function<Try<Owned<Fetcher::Plugin>>()> Creator; |
| |
| hashmap<string, Creator> creators; |
| creators.put("curl", lambda::bind(&CurlFetcherPlugin::create, flags)); |
| creators.put("file", lambda::bind(&CopyFetcherPlugin::create, flags)); |
| creators.put("hadoop", lambda::bind(&HadoopFetcherPlugin::create, flags)); |
| creators.put("docker", lambda::bind(&DockerFetcherPlugin::create, flags)); |
| |
| hashmap<string, Owned<Fetcher::Plugin>> plugins; |
| |
| foreachpair (const string& name, const Creator& creator, creators) { |
| Try<Owned<Fetcher::Plugin>> plugin = creator(); |
| if (plugin.isError()) { |
| // NOTE: We skip the plugin if it cannot be created, instead of |
| // returning an Error so that we can still use other plugins. |
| LOG(ERROR) << "Failed to create URI fetcher plugin " |
| << "'" << name << "': " << plugin.error(); |
| continue; |
| } |
| |
| foreach (const string& scheme, plugin.get()->schemes()) { |
| if (plugins.contains(scheme)) { |
| LOG(WARNING) << "Multiple URI fetcher plugins register " |
| << "URI scheme '" << scheme << "'"; |
| } |
| |
| plugins.put(scheme, plugin.get()); |
| } |
| } |
| |
| return Owned<Fetcher>(new Fetcher(plugins)); |
| } |
| |
| } // namespace fetcher { |
| |
| |
| Future<Nothing> Fetcher::fetch( |
| const URI& uri, |
| const string& directory) const |
| { |
| if (!plugins.contains(uri.scheme())) { |
| return Failure("Scheme '" + uri.scheme() + "' is not supported"); |
| } |
| |
| return plugins.at(uri.scheme())->fetch(uri, directory); |
| } |
| |
| } // namespace uri { |
| } // namespace mesos { |