alshabib | ab98466 | 2014-12-04 18:56:18 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2014 Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 16 | package org.onosproject.store.service.impl; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 17 | |
Yuta HIGUCHI | 2fe6334 | 2014-11-17 21:33:38 -0800 | [diff] [blame] | 18 | import static com.google.common.base.Preconditions.checkNotNull; |
Yuta HIGUCHI | 39da979 | 2014-11-14 02:07:04 -0800 | [diff] [blame] | 19 | import static org.slf4j.LoggerFactory.getLogger; |
Yuta HIGUCHI | f846844 | 2014-11-11 10:09:20 -0800 | [diff] [blame] | 20 | |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 21 | import java.util.Arrays; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 22 | import java.util.List; |
Yuta HIGUCHI | 841c0b6 | 2014-11-13 20:27:14 -0800 | [diff] [blame] | 23 | import java.util.Map; |
Madan Jampani | f5d263b | 2014-11-13 10:04:40 -0800 | [diff] [blame] | 24 | import java.util.Set; |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 25 | import java.util.UUID; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 26 | import java.util.concurrent.CompletableFuture; |
| 27 | import java.util.concurrent.ExecutionException; |
Yuta HIGUCHI | 39da979 | 2014-11-14 02:07:04 -0800 | [diff] [blame] | 28 | import java.util.concurrent.TimeUnit; |
Yuta HIGUCHI | b9d6866 | 2014-11-14 16:06:03 -0800 | [diff] [blame] | 29 | import java.util.concurrent.TimeoutException; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 30 | |
Madan Jampani | 5ce3025 | 2014-11-17 20:53:17 -0800 | [diff] [blame] | 31 | import net.kuujo.copycat.cluster.Member; |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 32 | import net.kuujo.copycat.cluster.TcpMember; |
Yuta HIGUCHI | 39da979 | 2014-11-14 02:07:04 -0800 | [diff] [blame] | 33 | import net.kuujo.copycat.event.LeaderElectEvent; |
Yuta HIGUCHI | d09f101 | 2014-11-20 10:00:10 -0800 | [diff] [blame] | 34 | import net.kuujo.copycat.protocol.Response.Status; |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 35 | import net.kuujo.copycat.protocol.SubmitRequest; |
| 36 | import net.kuujo.copycat.protocol.SubmitResponse; |
| 37 | import net.kuujo.copycat.spi.protocol.ProtocolClient; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 38 | |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 39 | import org.onosproject.store.cluster.messaging.ClusterMessage; |
| 40 | import org.onosproject.store.cluster.messaging.ClusterMessageHandler; |
| 41 | import org.onosproject.store.service.BatchReadRequest; |
| 42 | import org.onosproject.store.service.BatchWriteRequest; |
| 43 | import org.onosproject.store.service.DatabaseException; |
| 44 | import org.onosproject.store.service.ReadResult; |
| 45 | import org.onosproject.store.service.VersionedValue; |
| 46 | import org.onosproject.store.service.WriteResult; |
Yuta HIGUCHI | 39da979 | 2014-11-14 02:07:04 -0800 | [diff] [blame] | 47 | import org.slf4j.Logger; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 48 | |
Madan Jampani | 686fa18 | 2014-11-04 23:16:27 -0800 | [diff] [blame] | 49 | /** |
| 50 | * Client for interacting with the Copycat Raft cluster. |
| 51 | */ |
Madan Jampani | 5ce3025 | 2014-11-17 20:53:17 -0800 | [diff] [blame] | 52 | public class DatabaseClient implements ClusterMessageHandler { |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 53 | |
Yuta HIGUCHI | b9d6866 | 2014-11-14 16:06:03 -0800 | [diff] [blame] | 54 | private static final int RETRIES = 5; |
| 55 | |
| 56 | private static final int TIMEOUT_MS = 2000; |
| 57 | |
Yuta HIGUCHI | 39da979 | 2014-11-14 02:07:04 -0800 | [diff] [blame] | 58 | private final Logger log = getLogger(getClass()); |
| 59 | |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 60 | private final DatabaseProtocolService protocol; |
Yuta HIGUCHI | 2fe6334 | 2014-11-17 21:33:38 -0800 | [diff] [blame] | 61 | private volatile ProtocolClient client = null; |
Madan Jampani | 5ce3025 | 2014-11-17 20:53:17 -0800 | [diff] [blame] | 62 | private volatile Member currentLeader = null; |
| 63 | private volatile long currentLeaderTerm = 0; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 64 | |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 65 | public DatabaseClient(DatabaseProtocolService protocol) { |
Yuta HIGUCHI | 2fe6334 | 2014-11-17 21:33:38 -0800 | [diff] [blame] | 66 | this.protocol = checkNotNull(protocol); |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 67 | } |
| 68 | |
| 69 | @Override |
Madan Jampani | 5ce3025 | 2014-11-17 20:53:17 -0800 | [diff] [blame] | 70 | public void handle(ClusterMessage message) { |
| 71 | LeaderElectEvent event = |
Yuta HIGUCHI | 91768e3 | 2014-11-22 05:06:35 -0800 | [diff] [blame] | 72 | ClusterMessagingProtocol.DB_SERIALIZER.decode(message.payload()); |
Madan Jampani | 5ce3025 | 2014-11-17 20:53:17 -0800 | [diff] [blame] | 73 | TcpMember newLeader = event.leader(); |
| 74 | long newLeaderTerm = event.term(); |
| 75 | if (newLeader != null && !newLeader.equals(currentLeader) && newLeaderTerm > currentLeaderTerm) { |
| 76 | log.info("New leader detected. Leader: {}, term: {}", newLeader, newLeaderTerm); |
Yuta HIGUCHI | 2fe6334 | 2014-11-17 21:33:38 -0800 | [diff] [blame] | 77 | ProtocolClient prevClient = client; |
Madan Jampani | 5ce3025 | 2014-11-17 20:53:17 -0800 | [diff] [blame] | 78 | ProtocolClient newClient = protocol.createClient(newLeader); |
| 79 | newClient.connect(); |
| 80 | client = newClient; |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 81 | currentLeader = newLeader; |
Madan Jampani | 5ce3025 | 2014-11-17 20:53:17 -0800 | [diff] [blame] | 82 | currentLeaderTerm = newLeaderTerm; |
| 83 | |
Yuta HIGUCHI | 2fe6334 | 2014-11-17 21:33:38 -0800 | [diff] [blame] | 84 | if (prevClient != null) { |
| 85 | prevClient.close(); |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 86 | } |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 87 | } |
| 88 | } |
| 89 | |
| 90 | private String nextRequestId() { |
| 91 | return UUID.randomUUID().toString(); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 92 | } |
| 93 | |
Yuta HIGUCHI | 39da979 | 2014-11-14 02:07:04 -0800 | [diff] [blame] | 94 | public void waitForLeader() { |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 95 | if (currentLeader != null) { |
Yuta HIGUCHI | 39da979 | 2014-11-14 02:07:04 -0800 | [diff] [blame] | 96 | return; |
| 97 | } |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 98 | |
Yuta HIGUCHI | 39da979 | 2014-11-14 02:07:04 -0800 | [diff] [blame] | 99 | log.info("No leader in cluster, waiting for election."); |
Yuta HIGUCHI | 39da979 | 2014-11-14 02:07:04 -0800 | [diff] [blame] | 100 | |
Yuta HIGUCHI | 39da979 | 2014-11-14 02:07:04 -0800 | [diff] [blame] | 101 | try { |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 102 | while (currentLeader == null) { |
| 103 | Thread.sleep(200); |
Yuta HIGUCHI | 39da979 | 2014-11-14 02:07:04 -0800 | [diff] [blame] | 104 | } |
Yuta HIGUCHI | 39da979 | 2014-11-14 02:07:04 -0800 | [diff] [blame] | 105 | return; |
| 106 | } catch (InterruptedException e) { |
| 107 | log.error("Interrupted while waiting for Leader", e); |
| 108 | Thread.currentThread().interrupt(); |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 109 | } |
| 110 | } |
| 111 | |
| 112 | private <T> T submit(String operationName, Object... args) { |
| 113 | waitForLeader(); |
| 114 | if (currentLeader == null) { |
| 115 | throw new DatabaseException("Raft cluster does not have a leader."); |
| 116 | } |
| 117 | |
| 118 | SubmitRequest request = |
| 119 | new SubmitRequest(nextRequestId(), operationName, Arrays.asList(args)); |
| 120 | |
Yuta HIGUCHI | 2fe6334 | 2014-11-17 21:33:38 -0800 | [diff] [blame] | 121 | CompletableFuture<SubmitResponse> submitResponse = client.submit(request); |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 122 | |
| 123 | log.debug("Sent {} to {}", request, currentLeader); |
| 124 | |
| 125 | try { |
Yuta HIGUCHI | d09f101 | 2014-11-20 10:00:10 -0800 | [diff] [blame] | 126 | final SubmitResponse response = submitResponse.get(TIMEOUT_MS, TimeUnit.MILLISECONDS); |
| 127 | if (response.status() != Status.OK) { |
| 128 | throw new DatabaseException(response.error()); |
| 129 | } |
| 130 | return (T) response.result(); |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 131 | } catch (ExecutionException | InterruptedException e) { |
| 132 | throw new DatabaseException(e); |
| 133 | } catch (TimeoutException e) { |
| 134 | throw new DatabaseException.Timeout(e); |
Yuta HIGUCHI | 39da979 | 2014-11-14 02:07:04 -0800 | [diff] [blame] | 135 | } |
| 136 | } |
| 137 | |
| 138 | public boolean createTable(String tableName) { |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 139 | return submit("createTable", tableName); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 140 | } |
| 141 | |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 142 | public boolean createTable(String tableName, int ttlMillis) { |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 143 | return submit("createTable", tableName, ttlMillis); |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 144 | } |
| 145 | |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 146 | public void dropTable(String tableName) { |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 147 | submit("dropTable", tableName); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 148 | } |
| 149 | |
| 150 | public void dropAllTables() { |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 151 | submit("dropAllTables"); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 152 | } |
| 153 | |
Madan Jampani | f5d263b | 2014-11-13 10:04:40 -0800 | [diff] [blame] | 154 | public Set<String> listTables() { |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 155 | return submit("listTables"); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 156 | } |
| 157 | |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 158 | public List<ReadResult> batchRead(BatchReadRequest batchRequest) { |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 159 | return submit("read", batchRequest); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 160 | } |
| 161 | |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 162 | public List<WriteResult> batchWrite(BatchWriteRequest batchRequest) { |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 163 | return submit("write", batchRequest); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 164 | } |
Yuta HIGUCHI | 841c0b6 | 2014-11-13 20:27:14 -0800 | [diff] [blame] | 165 | |
| 166 | public Map<String, VersionedValue> getAll(String tableName) { |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 167 | return submit("getAll", tableName); |
Yuta HIGUCHI | 841c0b6 | 2014-11-13 20:27:14 -0800 | [diff] [blame] | 168 | } |
Yuta HIGUCHI | f0f2dfc | 2014-11-26 13:59:07 -0800 | [diff] [blame] | 169 | |
| 170 | Member getCurrentLeader() { |
| 171 | return currentLeader; |
| 172 | } |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 173 | } |