924ca5915e
We use storage_proxy::mutate_locally() to apply the mutations when we receive them. mutate_locally() will ignore the mutation if the cf does not exist. We check in the prepare phase to make sure all the cf's exist.
414 lines
16 KiB
C++
414 lines
16 KiB
C++
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Modified by Cloudius Systems.
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* Copyright 2015 Cloudius Systems.
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*/
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#pragma once
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#include "gms/i_endpoint_state_change_subscriber.hh"
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#include "core/distributed.hh"
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#include "cql3/query_processor.hh"
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#include "message/messaging_service.hh"
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#include "utils/UUID.hh"
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#include "streaming/stream_session_state.hh"
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#include "streaming/stream_transfer_task.hh"
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#include "streaming/stream_receive_task.hh"
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#include "streaming/stream_request.hh"
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#include "streaming/messages/incoming_file_message.hh"
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#include "streaming/messages/prepare_message.hh"
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#include "streaming/stream_detail.hh"
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#include "streaming/session_info.hh"
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#include "sstables/sstables.hh"
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#include "query-request.hh"
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#include "dht/i_partitioner.hh"
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#include <map>
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#include <vector>
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#include <memory>
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namespace streaming {
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class stream_result_future;
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/**
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* Handles the streaming a one or more section of one of more sstables to and from a specific
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* remote node.
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*
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* Both this node and the remote one will create a similar symmetrical StreamSession. A streaming
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* session has the following life-cycle:
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*
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* 1. Connections Initialization
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*
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* (a) A node (the initiator in the following) create a new StreamSession, initialize it (init())
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* and then start it (start()). Start will create a {@link ConnectionHandler} that will create
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* two connections to the remote node (the follower in the following) with whom to stream and send
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* a StreamInit message. The first connection will be the incoming connection for the
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* initiator, and the second connection will be the outgoing.
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* (b) Upon reception of that StreamInit message, the follower creates its own StreamSession,
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* initialize it if it still does not exist, and attach connecting socket to its ConnectionHandler
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* according to StreamInit message's isForOutgoing flag.
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* (d) When the both incoming and outgoing connections are established, StreamSession calls
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* StreamSession#onInitializationComplete method to start the streaming prepare phase
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* (StreamResultFuture.startStreaming()).
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*
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* 2. Streaming preparation phase
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*
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* (a) This phase is started when the initiator onInitializationComplete() method is called. This method sends a
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* PrepareMessage that includes what files/sections this node will stream to the follower
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* (stored in a StreamTransferTask, each column family has it's own transfer task) and what
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* the follower needs to stream back (StreamReceiveTask, same as above). If the initiator has
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* nothing to receive from the follower, it goes directly to its Streaming phase. Otherwise,
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* it waits for the follower PrepareMessage.
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* (b) Upon reception of the PrepareMessage, the follower records which files/sections it will receive
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* and send back its own PrepareMessage with a summary of the files/sections that will be sent to
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* the initiator (prepare()). After having sent that message, the follower goes to its Streamning
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* phase.
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* (c) When the initiator receives the follower PrepareMessage, it records which files/sections it will
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* receive and then goes to his own Streaming phase.
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*
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* 3. Streaming phase
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*
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* (a) The streaming phase is started by each node (the sender in the follower, but note that each side
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* of the StreamSession may be sender for some of the files) involved by calling startStreamingFiles().
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* This will sequentially send a FileMessage for each file of each SteamTransferTask. Each FileMessage
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* consists of a FileMessageHeader that indicates which file is coming and then start streaming the
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* content for that file (StreamWriter in FileMessage.serialize()). When a file is fully sent, the
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* fileSent() method is called for that file. If all the files for a StreamTransferTask are sent
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* (StreamTransferTask.complete()), the task is marked complete (taskCompleted()).
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* (b) On the receiving side, a SSTable will be written for the incoming file (StreamReader in
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* FileMessage.deserialize()) and once the FileMessage is fully received, the file will be marked as
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* complete (received()). When all files for the StreamReceiveTask have been received, the sstables
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* are added to the CFS (and 2ndary index are built, StreamReceiveTask.complete()) and the task
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* is marked complete (taskCompleted())
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* (b) If during the streaming of a particular file an I/O error occurs on the receiving end of a stream
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* (FileMessage.deserialize), the node will retry the file (up to DatabaseDescriptor.getMaxStreamingRetries())
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* by sending a RetryMessage to the sender. On receiving a RetryMessage, the sender simply issue a new
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* FileMessage for that file.
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* (c) When all transfer and receive tasks for a session are complete, the move to the Completion phase
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* (maybeCompleted()).
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*
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* 4. Completion phase
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*
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* (a) When a node has finished all transfer and receive task, it enter the completion phase (maybeCompleted()).
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* If it had already received a CompleteMessage from the other side (it is in the WAIT_COMPLETE state), that
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* session is done is is closed (closeSession()). Otherwise, the node switch to the WAIT_COMPLETE state and
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* send a CompleteMessage to the other side.
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*/
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class stream_session : public gms::i_endpoint_state_change_subscriber, public enable_shared_from_this<stream_session> {
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private:
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using messaging_verb = net::messaging_verb;
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using messaging_service = net::messaging_service;
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using shard_id = net::messaging_service::shard_id;
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using inet_address = gms::inet_address;
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using endpoint_state = gms::endpoint_state;
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using application_state = gms::application_state;
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using versioned_value = gms::versioned_value;
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using UUID = utils::UUID;
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using token = dht::token;
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using ring_position = dht::ring_position;
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class handler {
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public:
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future<> stop() {
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return make_ready_future<>();
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}
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};
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static distributed<handler> _handlers;
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static void init_messaging_service_handler();
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static distributed<database>* _db;
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public:
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static net::messaging_service& ms() {
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return net::get_local_messaging_service();
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}
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static database& get_local_db() { return _db->local(); }
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static future<> init_streaming_service(distributed<database>& db);
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static future<> test(distributed<cql3::query_processor>& qp);
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public:
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/**
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* Streaming endpoint.
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*
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* Each {@code StreamSession} is identified by this InetAddress which is broadcast address of the node streaming.
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*/
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inet_address peer;
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/** Actual connecting address. Can be the same as {@linkplain #peer}. */
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inet_address connecting;
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unsigned src_cpu_id;
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unsigned dst_cpu_id;
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private:
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int _index;
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// should not be null when session is started
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shared_ptr<stream_result_future> _stream_result;
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// stream requests to send to the peer
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std::vector<stream_request> _requests;
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// streaming tasks are created and managed per ColumnFamily ID
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std::map<UUID, stream_transfer_task> _transfers;
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// data receivers, filled after receiving prepare message
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std::map<UUID, stream_receive_task> _receivers;
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//private final StreamingMetrics metrics;
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/* can be null when session is created in remote */
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//private final StreamConnectionFactory factory;
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int _retries;
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bool _is_aborted = false;
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bool _keep_ss_table_level;
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stream_session_state _state = stream_session_state::INITIALIZED;
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bool _complete_sent = false;
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public:
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stream_session();
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/**
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* Create new streaming session with the peer.
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*
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* @param peer Address of streaming peer
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* @param connecting Actual connecting address
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* @param factory is used for establishing connection
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*/
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stream_session(inet_address peer_, inet_address connecting_, int index_, bool keep_ss_table_level_);
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~stream_session();
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UUID plan_id();
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int session_index() {
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return _index;
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}
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sstring description();
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public:
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bool keep_ss_table_level() {
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return _keep_ss_table_level;
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}
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/**
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* Bind this session to report to specific {@link StreamResultFuture} and
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* perform pre-streaming initialization.
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*
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* @param streamResult result to report to
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*/
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void init(shared_ptr<stream_result_future> stream_result_);
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void start();
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#if 0
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public Socket createConnection() throws IOException
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{
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assert factory != null;
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return factory.createConnection(connecting);
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}
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#endif
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/**
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* Request data fetch task to this session.
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*
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* @param keyspace Requesting keyspace
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* @param ranges Ranges to retrieve data
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* @param columnFamilies ColumnFamily names. Can be empty if requesting all CF under the keyspace.
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*/
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void add_stream_request(sstring keyspace, std::vector<query::range<token>> ranges, std::vector<sstring> column_families, long repaired_at) {
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_requests.emplace_back(std::move(keyspace), std::move(ranges), std::move(column_families), repaired_at);
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}
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/**
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* Set up transfer for specific keyspace/ranges/CFs
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*
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* Used in repair - a streamed sstable in repair will be marked with the given repairedAt time
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*
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* @param keyspace Transfer keyspace
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* @param ranges Transfer ranges
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* @param columnFamilies Transfer ColumnFamilies
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* @param flushTables flush tables?
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* @param repairedAt the time the repair started.
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*/
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void add_transfer_ranges(sstring keyspace, std::vector<query::range<token>> ranges, std::vector<sstring> column_families, bool flush_tables, long repaired_at);
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std::vector<column_family*> get_column_family_stores(const sstring& keyspace, const std::vector<sstring>& column_families);
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void add_transfer_files(std::vector<stream_detail> sstable_details);
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private:
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void close_session(stream_session_state final_state);
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public:
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/**
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* Set current state to {@code newState}.
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*
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* @param newState new state to set
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*/
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void set_state(stream_session_state new_state) {
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_state = new_state;
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}
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/**
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* @return current state
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*/
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stream_session_state get_state() {
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return _state;
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}
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/**
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* Return if this session completed successfully.
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*
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* @return true if session completed successfully.
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*/
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bool is_success() {
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return _state == stream_session_state::COMPLETE;
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}
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#if 0
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public void messageReceived(StreamMessage message)
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{
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switch (message.type)
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{
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case PREPARE:
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PrepareMessage msg = (PrepareMessage) message;
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prepare(msg.requests, msg.summaries);
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break;
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case FILE:
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receive((IncomingFileMessage) message);
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break;
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case RECEIVED:
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ReceivedMessage received = (ReceivedMessage) message;
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received(received.cfId, received.sequenceNumber);
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break;
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case RETRY:
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RetryMessage retry = (RetryMessage) message;
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retry(retry.cfId, retry.sequenceNumber);
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break;
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case COMPLETE:
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complete();
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break;
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case SESSION_FAILED:
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sessionFailed();
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break;
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}
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}
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#endif
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future<> initiate();
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/**
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* Call back when connection initialization is complete to start the prepare phase.
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*/
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future<> on_initialization_complete();
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/**l
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* Call back for handling exception during streaming.
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*
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* @param e thrown exception
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*/
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void on_error();
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/**
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* Prepare this session for sending/receiving files.
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*/
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future<messages::prepare_message> prepare(std::vector<stream_request> requests, std::vector<stream_summary> summaries);
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/**
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* Call back after sending FileMessageHeader.
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*
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* @param header sent header
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*/
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void file_sent(const messages::file_message_header& header);
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/**
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* Call back after receiving FileMessageHeader.
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*
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* @param message received file
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*/
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void receive(messages::incoming_file_message message);
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void progress(/* Descriptor desc */ progress_info::direction dir, long bytes, long total);
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void received(UUID cf_id, int sequence_number);
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/**
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* Call back on receiving {@code StreamMessage.Type.RETRY} message.
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*
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* @param cfId ColumnFamily ID
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* @param sequenceNumber Sequence number to indicate which file to stream again
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*/
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void retry(UUID cf_id, int sequence_number);
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/**
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* Check if session is completed on receiving {@code StreamMessage.Type.COMPLETE} message.
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*/
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void complete();
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/**
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* Call back on receiving {@code StreamMessage.Type.SESSION_FAILED} message.
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*/
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void session_failed();
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#if 0
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public void doRetry(FileMessageHeader header, Throwable e)
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{
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logger.warn("[Stream #{}] Retrying for following error", planId(), e);
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// retry
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retries++;
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if (retries > DatabaseDescriptor.getMaxStreamingRetries())
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onError(new IOException("Too many retries for " + header, e));
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else
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handler.sendMessage(new RetryMessage(header.cfId, header.sequenceNumber));
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}
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#endif
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/**
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* @return Current snapshot of this session info.
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*/
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session_info get_session_info();
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void receive_task_completed(UUID cf_id);
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void task_completed(stream_receive_task& completed_task);
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void task_completed(stream_transfer_task& completed_task);
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public:
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virtual void on_join(inet_address endpoint, endpoint_state ep_state) override {}
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virtual void before_change(inet_address endpoint, endpoint_state current_state, application_state new_state_key, versioned_value new_value) override {}
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virtual void on_change(inet_address endpoint, application_state state, versioned_value value) override {}
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virtual void on_alive(inet_address endpoint, endpoint_state state) override {}
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virtual void on_dead(inet_address endpoint, endpoint_state state) override {}
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virtual void on_remove(inet_address endpoint) override { close_session(stream_session_state::FAILED); }
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virtual void on_restart(inet_address endpoint, endpoint_state ep_state) override { close_session(stream_session_state::FAILED); }
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private:
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future<> send_complete_message();
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bool maybe_completed();
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#if 0
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/**
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* Flushes matching column families from the given keyspace, or all columnFamilies
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* if the cf list is empty.
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*/
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private void flushSSTables(Iterable<ColumnFamilyStore> stores)
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{
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List<Future<?>> flushes = new ArrayList<>();
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for (ColumnFamilyStore cfs : stores)
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flushes.add(cfs.forceFlush());
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FBUtilities.waitOnFutures(flushes);
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}
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#endif
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void prepare_receiving(stream_summary& summary);
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void start_streaming_files();
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};
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} // namespace streaming
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