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