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rpc: remove uri resolver; move partition resolver to replication/clie…
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| /* | ||
| * The MIT License (MIT) | ||
| * | ||
| * Copyright (c) 2015 Microsoft Corporation | ||
| * | ||
| * -=- Robust Distributed System Nucleus (rDSN) -=- | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| * of this software and associated documentation files (the "Software"), to deal | ||
| * in the Software without restriction, including without limitation the rights | ||
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| * copies of the Software, and to permit persons to whom the Software is | ||
| * furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included in | ||
| * all copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
| * THE SOFTWARE. | ||
| */ | ||
|
|
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| #pragma once | ||
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| #include <dsn/utility/autoref_ptr.h> | ||
| #include <dsn/utility/error_code.h> | ||
| #include <dsn/tool-api/gpid.h> | ||
| #include <dsn/tool-api/rpc_address.h> | ||
| #include <dsn/tool-api/rpc_message.h> | ||
| #include <dsn/tool-api/async_calls.h> | ||
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| namespace dsn { | ||
| namespace replication { | ||
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| class partition_resolver : public ref_counter | ||
| { | ||
| public: | ||
| static dsn::ref_ptr<partition_resolver> | ||
| get_resolver(const char *cluster_name, | ||
| const std::vector<dsn::rpc_address> &meta_list, | ||
| const char *app_name); | ||
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| template <typename TReq, typename TCallback> | ||
| dsn::rpc_response_task_ptr call_op(dsn::task_code code, | ||
| TReq &&request, | ||
| dsn::task_tracker *tracker, | ||
| TCallback &&callback, | ||
| std::chrono::milliseconds timeout, | ||
| uint64_t partition_hash, | ||
| int reply_hash = 0) | ||
| { | ||
| dsn::message_ex *msg = dsn::message_ex::create_request( | ||
| code, static_cast<int>(timeout.count()), 0, partition_hash); | ||
| marshall(msg, std::forward<TReq>(request)); | ||
| dsn::rpc_response_task_ptr response_task = rpc::create_rpc_response_task( | ||
| msg, tracker, std::forward<TCallback>(callback), reply_hash); | ||
| call_task(response_task); | ||
| return response_task; | ||
| } | ||
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| // choosing a proper replica server from meta server or local route cache | ||
| // and send the read/write request. | ||
| // if got reply or error, call the callback. | ||
| // parameters like request data, timeout, callback handler are all wrapped | ||
| // into "task", you may want to refer to dsn::rpc_response_task for details. | ||
| void call_task(const dsn::rpc_response_task_ptr &task); | ||
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| std::string get_app_name() const { return _app_name; } | ||
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| dsn::rpc_address get_meta_server() const { return _meta_server; } | ||
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| protected: | ||
| partition_resolver(rpc_address meta_server, const char *app_name) | ||
| : _app_name(app_name), _meta_server(meta_server) | ||
| { | ||
| } | ||
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| virtual ~partition_resolver() {} | ||
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| struct resolve_result | ||
| { | ||
| ///< ERR_OK | ||
| ///< ERR_SERVICE_NOT_FOUND if resolver or app is missing | ||
| ///< ERR_IO_PENDING if resolve in is progress, callers | ||
| ///< should call resolve_async in this case | ||
| error_code err; | ||
| ///< IPv4 of the target to send request to | ||
| rpc_address address; | ||
| ///< global partition indentity | ||
| dsn::gpid pid; | ||
| }; | ||
|
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| /** | ||
| * resolve partition_hash into IP or group addresses to know what to connect next | ||
| * | ||
| * \param partition_hash the partition hash | ||
| * \param callback callback invoked on completion or timeout | ||
| * \param timeout_ms timeout to execute the callback | ||
| * | ||
| * \return see \ref resolve_result for details | ||
| */ | ||
| virtual void resolve(uint64_t partition_hash, | ||
| std::function<void(resolve_result &&)> &&callback, | ||
| int timeout_ms) = 0; | ||
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| /*! | ||
| failure handler when access failed for certain partition | ||
| \param partition_index zero-based index of the partition. | ||
| \param err error code | ||
| this is usually to trigger new round of address resolve | ||
| */ | ||
| virtual void on_access_failure(int partition_index, error_code err) = 0; | ||
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| /** | ||
| * get zero-based partition index | ||
| * | ||
| * \param partition_count number of partitions. | ||
| * \param partition_hash the partition hash. | ||
| * | ||
| * \return zero-based partition index. | ||
| */ | ||
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| virtual int get_partition_index(int partition_count, uint64_t partition_hash) = 0; | ||
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| std::string _cluster_name; | ||
| std::string _app_name; | ||
| rpc_address _meta_server; | ||
| }; | ||
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| typedef ref_ptr<partition_resolver> partition_resolver_ptr; | ||
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| } // namespace replication | ||
| } // namespace dsn |
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