SplitTransactionCoordination (Apache HBase 1.2.12 API)

All Known Implementing Classes:

ZKSplitTransactionCoordination
```
@InterfaceAudience.Private
public interface SplitTransactionCoordination
```
Coordination operations for split transaction. The split operation should be coordinated at the following stages: 1. start - all preparation/initialization for split transaction should be done there. 2. waitForSplitTransaction - the coordination should perform all logic related to split transaction and wait till it's finished 3. completeSplitTransaction - all steps that are required to complete the transaction. Called after PONR (point of no return)

Nested Class Summary

Nested Classes
Modifier and Type Interface and Description

static interface SplitTransactionCoordination.SplitTransactionDetails
Dummy interface for split transaction details.

Nested Classes
Modifier and Type	Interface and Description
`static interface`	`SplitTransactionCoordination.SplitTransactionDetails` Dummy interface for split transaction details.

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`clean(HRegionInfo hri)` clean the split transaction
`void`	`completeSplitTransaction(RegionServerServices services, Region first, Region second, SplitTransactionCoordination.SplitTransactionDetails std, Region parent)` Finish off split transaction
`SplitTransactionCoordination.SplitTransactionDetails`	`getDefaultDetails()`
`int`	`processTransition(HRegionInfo p, HRegionInfo hri_a, HRegionInfo hri_b, ServerName sn, SplitTransactionCoordination.SplitTransactionDetails std)` Required by AssignmentManager
`void`	`startSplitTransaction(HRegion parent, ServerName serverName, HRegionInfo hri_a, HRegionInfo hri_b)` init coordination for split transaction
`void`	`waitForSplitTransaction(RegionServerServices services, Region parent, HRegionInfo hri_a, HRegionInfo hri_b, SplitTransactionCoordination.SplitTransactionDetails std)` Wait while coordination process the transaction

Method Detail

getDefaultDetails

SplitTransactionCoordination.SplitTransactionDetails getDefaultDetails()

startSplitTransaction

void startSplitTransaction(HRegion parent,
                         ServerName serverName,
                         HRegionInfo hri_a,
                         HRegionInfo hri_b)
                           throws IOException

init coordination for split transaction

Parameters:: parent - region to be created as offline; serverName - server event originates from; hri_a - daughter region; hri_b - daughter region
Throws:: IOException

waitForSplitTransaction

void waitForSplitTransaction(RegionServerServices services,
                           Region parent,
                           HRegionInfo hri_a,
                           HRegionInfo hri_b,
                           SplitTransactionCoordination.SplitTransactionDetails std)
                             throws IOException

Wait while coordination process the transaction

Parameters:: services - Used to online/offline regions.; parent - region; hri_a - daughter region; hri_b - daughter region; std - split transaction details
Throws:: IOException

completeSplitTransaction

void completeSplitTransaction(RegionServerServices services,
                            Region first,
                            Region second,
                            SplitTransactionCoordination.SplitTransactionDetails std,
                            Region parent)
                              throws IOException

Finish off split transaction

Parameters:: services - Used to online/offline regions.; first - daughter region; second - daughter region; std - split transaction details; parent -
Throws:: IOException - If thrown, transaction failed. Call SplitTransaction.rollback( Server, RegionServerServices)

clean
```
void clean(HRegionInfo hri)
```
clean the split transaction

Parameters:
hri - node to delete

processTransition

int processTransition(HRegionInfo p,
                    HRegionInfo hri_a,
                    HRegionInfo hri_b,
                    ServerName sn,
                    SplitTransactionCoordination.SplitTransactionDetails std)
                      throws IOException

Required by AssignmentManager

Throws:: IOException

Interface SplitTransactionCoordination

Nested Class Summary

Method Summary

Method Detail

getDefaultDetails

startSplitTransaction

waitForSplitTransaction

completeSplitTransaction

clean

processTransition