import org.apache.cassandra.repair.messages.SyncRequest; //导入依赖的package包/类
public void doVerb(MessageIn<RepairMessage> message, int id)
{
    // TODO add cancel/interrupt message
    RepairJobDesc desc = message.payload.desc;
    switch (message.payload.messageType)
    {
        case VALIDATION_REQUEST:
            ValidationRequest validationRequest = (ValidationRequest) message.payload;
            // trigger read-only compaction
            ColumnFamilyStore store = Keyspace.open(desc.keyspace).getColumnFamilyStore(desc.columnFamily);
            Validator validator = new Validator(desc, message.from, validationRequest.gcBefore);
            CompactionManager.instance.submitValidation(store, validator);
            break;

        case SYNC_REQUEST:
            // forwarded sync request
            SyncRequest request = (SyncRequest) message.payload;
            StreamingRepairTask task = new StreamingRepairTask(desc, request);
            task.run();
            break;

        default:
            ActiveRepairService.instance.handleMessage(message.from, message.payload);
            break;
    }
}
 

import org.apache.cassandra.repair.messages.SyncRequest; //导入依赖的package包/类
/**
 * Starts sending/receiving our list of differences to/from the remote endpoint: creates a callback
 * that will be called out of band once the streams complete.
 */
void performStreamingRepair()
{
    InetAddress local = FBUtilities.getBroadcastAddress();
    // We can take anyone of the node as source or destination, however if one is localhost, we put at source to avoid a forwarding
    InetAddress src = r2.endpoint.equals(local) ? r2.endpoint : r1.endpoint;
    InetAddress dst = r2.endpoint.equals(local) ? r1.endpoint : r2.endpoint;

    SyncRequest request = new SyncRequest(desc, local, src, dst, differences);
    StreamingRepairTask task = new StreamingRepairTask(desc, request);
    task.run();
}
 

import org.apache.cassandra.repair.messages.SyncRequest; //导入依赖的package包/类
protected void startSync(List<Range<Token>> differences)
{
    InetAddress local = FBUtilities.getBroadcastAddress();
    SyncRequest request = new SyncRequest(desc, local, r1.endpoint, r2.endpoint, differences);
    String message = String.format("Forwarding streaming repair of %d ranges to %s (to be streamed with %s)", request.ranges.size(), request.src, request.dst);
    logger.info("[repair #{}] {}", desc.sessionId, message);
    Tracing.traceRepair(message);
    MessagingService.instance().sendOneWay(request.createMessage(), request.src);
}
 

import org.apache.cassandra.repair.messages.SyncRequest; //导入依赖的package包/类
public StreamingRepairTask(RepairJobDesc desc, SyncRequest request)
{
    this.desc = desc;
    this.request = request;
}
 

import org.apache.cassandra.repair.messages.SyncRequest; //导入依赖的package包/类
public StreamingRepairTask(RepairJobDesc desc, SyncRequest request, long repairedAt)
{
    this.desc = desc;
    this.request = request;
    this.repairedAt = repairedAt;
}
 

import org.apache.cassandra.repair.messages.SyncRequest; //导入依赖的package包/类
public void doVerb(MessageIn<RepairMessage> message, int id)
{
    // TODO add cancel/interrupt message
    RepairJobDesc desc = message.payload.desc;
    switch (message.payload.messageType)
    {
        case PREPARE_MESSAGE:
            PrepareMessage prepareMessage = (PrepareMessage) message.payload;
            List<ColumnFamilyStore> columnFamilyStores = new ArrayList<>(prepareMessage.cfIds.size());
            for (UUID cfId : prepareMessage.cfIds)
            {
                Pair<String, String> kscf = Schema.instance.getCF(cfId);
                ColumnFamilyStore columnFamilyStore = Keyspace.open(kscf.left).getColumnFamilyStore(kscf.right);
                columnFamilyStores.add(columnFamilyStore);
            }
            ActiveRepairService.instance.registerParentRepairSession(prepareMessage.parentRepairSession,
                                                                     columnFamilyStores,
                                                                     prepareMessage.ranges);
            MessagingService.instance().sendReply(new MessageOut(MessagingService.Verb.INTERNAL_RESPONSE), id, message.from);
            break;

        case VALIDATION_REQUEST:
            ValidationRequest validationRequest = (ValidationRequest) message.payload;
            // trigger read-only compaction
            ColumnFamilyStore store = Keyspace.open(desc.keyspace).getColumnFamilyStore(desc.columnFamily);

            Validator validator = new Validator(desc, message.from, validationRequest.gcBefore);
            CompactionManager.instance.submitValidation(store, validator);
            break;

        case SYNC_REQUEST:
            // forwarded sync request
            SyncRequest request = (SyncRequest) message.payload;
            StreamingRepairTask task = new StreamingRepairTask(desc, request);
            task.run();
            break;

        case ANTICOMPACTION_REQUEST:
            logger.debug("Got anticompaction request");
            AnticompactionRequest anticompactionRequest = (AnticompactionRequest) message.payload;
            try
            {
                List<Future<?>> futures = ActiveRepairService.instance.doAntiCompaction(anticompactionRequest.parentRepairSession);
                FBUtilities.waitOnFutures(futures);
            }
            catch (Exception e)
            {
                throw new RuntimeException(e);
            }

            break;

        default:
            ActiveRepairService.instance.handleMessage(message.from, message.payload);
            break;
    }
}