org.tikv.txn

接口 AbstractLockResolverClient

所有已知实现类:

LockResolverClientV2, LockResolverClientV3, LockResolverClientV4

public interface AbstractLockResolverClient

字段概要

字段

限定符和类型	字段和说明
static long	BIG_TXN_THRESHOLD transaction involves keys exceed this threshold can be treated as `big transaction`.
static long	RESOLVED_TXN_CACHE_SIZE ResolvedCacheSize is max number of cached txn status.

方法概要

限定符和类型	方法和说明
static Lock	extractLockFromKeyErr(Kvrpcpb.KeyError keyError, RequestKeyCodec codec)
static AbstractLockResolverClient	getInstance(TiConfiguration conf, TiRegion region, TiStore store, TikvGrpc.TikvBlockingStub blockingStub, TikvGrpc.TikvFutureStub asyncStub, ChannelFactory channelFactory, RegionManager regionManager, PDClient pdClient, RegionStoreClient.RegionStoreClientBuilder clientBuilder)
String	getVersion()
ResolveLockResult	resolveLocks(BackOffer bo, long callerStartTS, List<Lock> locks, boolean forWrite) ResolveLocks tries to resolve Locks.

字段详细资料

RESOLVED_TXN_CACHE_SIZE

static final long RESOLVED_TXN_CACHE_SIZE

ResolvedCacheSize is max number of cached txn status.

另请参阅:

常量字段值

BIG_TXN_THRESHOLD

static final long BIG_TXN_THRESHOLD

transaction involves keys exceed this threshold can be treated as `big transaction`.

另请参阅:

常量字段值

方法详细资料

extractLockFromKeyErr

static Lock extractLockFromKeyErr(Kvrpcpb.KeyError keyError,
                                  RequestKeyCodec codec)

getInstance

static AbstractLockResolverClient getInstance(TiConfiguration conf,
                                              TiRegion region,
                                              TiStore store,
                                              TikvGrpc.TikvBlockingStub blockingStub,
                                              TikvGrpc.TikvFutureStub asyncStub,
                                              ChannelFactory channelFactory,
                                              RegionManager regionManager,
                                              PDClient pdClient,
                                              RegionStoreClient.RegionStoreClientBuilder clientBuilder)

getVersion

String getVersion()

resolveLocks

ResolveLockResult resolveLocks(BackOffer bo,
                               long callerStartTS,
                               List<Lock> locks,
                               boolean forWrite)

ResolveLocks tries to resolve Locks. The resolving process is in 3 steps: 1) Use the `lockTTL` to pick up all expired locks. Only locks that are old enough are considered orphan locks and will be handled later. If all locks are expired then all locks will be resolved so true will be returned, otherwise caller should sleep a while before retry. 2) For each lock, query the primary key to get txn(which left the lock)'s commit status. 3) Send `ResolveLock` cmd to the lock's region to resolve all locks belong to the same transaction.

参数:

bo -

callerStartTS -

locks -

forWrite -

返回:

msBeforeTxnExpired: 0 means all locks are resolved