com.pingcap.tikv.allocator

类 RowIDAllocator

java.lang.Object

com.pingcap.tikv.allocator.RowIDAllocator

所有已实现的接口:

Serializable

public final class RowIDAllocator
extends Object
implements Serializable

RowIDAllocator read current start from TiKV and write back 'start+step' back to TiKV. It designs to allocate all id for data to be written at once, hence it does not need run inside a txn.

(start, end] is allocated

另请参阅:

序列化表格

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	RowIDAllocator.RowIDAllocatorType

方法概要

限定符和类型	方法和说明
static RowIDAllocator	create(long dbId, TiTableInfo table, TiConfiguration conf, org.tikv.common.meta.TiTimestamp timestamp, boolean unsigned, long shardBits, long step, RowIDAllocator.RowIDAllocatorType allocatorType)
static RowIDAllocator	createRowIDAllocator(long dbId, TiTableInfo tableInfo, TiConfiguration conf, long step, org.tikv.common.meta.TiTimestamp timestamp, RowIDAllocator.RowIDAllocatorType allocatorType)
static long	getAllocateId(long dbId, long tableId, Snapshot snapshot, RowIDAllocator.RowIDAllocatorType allocatorType) read current row id from TiKV according to database id and table id.
long	getAutoIncId(long index)
long	getAutoRandomId(long index)
long	getEnd()
static org.tikv.shade.com.google.protobuf.ByteString	getIdField(long tableId, RowIDAllocator.RowIDAllocatorType allocatorType)
long	getShardRowId(long index)
long	getStart()
static boolean	shardRowBitsOverflow(long base, long step, long shardRowBits, boolean reservedSignBit)
long	updateAllocateId(long dbId, long tableId, long step, Snapshot snapshot, long shard, boolean hasSignedBit) read current row id from TiKV and write the calculated value back to TiKV.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

方法详细资料

getAutoIncId

public long getAutoIncId(long index)

getShardRowId

public long getShardRowId(long index)

参数:

index - should >= 1

返回:

getAutoRandomId

public long getAutoRandomId(long index)

createRowIDAllocator

public static RowIDAllocator createRowIDAllocator(long dbId,
                                                  TiTableInfo tableInfo,
                                                  TiConfiguration conf,
                                                  long step,
                                                  org.tikv.common.meta.TiTimestamp timestamp,
                                                  RowIDAllocator.RowIDAllocatorType allocatorType)

create

public static RowIDAllocator create(long dbId,
                                    TiTableInfo table,
                                    TiConfiguration conf,
                                    org.tikv.common.meta.TiTimestamp timestamp,
                                    boolean unsigned,
                                    long shardBits,
                                    long step,
                                    RowIDAllocator.RowIDAllocatorType allocatorType)

getStart

public long getStart()

getEnd

public long getEnd()

shardRowBitsOverflow

public static boolean shardRowBitsOverflow(long base,
                                           long step,
                                           long shardRowBits,
                                           boolean reservedSignBit)

updateAllocateId

public long updateAllocateId(long dbId,
                             long tableId,
                             long step,
                             Snapshot snapshot,
                             long shard,
                             boolean hasSignedBit)

read current row id from TiKV and write the calculated value back to TiKV. The calculation rule is start(read from TiKV) + step.

getIdField

public static org.tikv.shade.com.google.protobuf.ByteString getIdField(long tableId,
                                                                       RowIDAllocator.RowIDAllocatorType allocatorType)

getAllocateId

public static long getAllocateId(long dbId,
                                 long tableId,
                                 Snapshot snapshot,
                                 RowIDAllocator.RowIDAllocatorType allocatorType)

read current row id from TiKV according to database id and table id.