TwoPhaseCommit (The Adobe Experience Manager SDK 2022.11.9850.20221116T162329Z-220900)

All Known Subinterfaces:

TaxonomyWriter

All Known Implementing Classes:

DirectoryTaxonomyWriter, IndexWriter
```
public interface TwoPhaseCommit
```
An interface for implementations that support 2-phase commit. You can use TwoPhaseCommitTool to execute a 2-phase commit algorithm over several TwoPhaseCommits.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`commit()`	The second phase of a 2-phase commit.
`void`	`prepareCommit()`	The first stage of a 2-phase commit.
`void`	`rollback()`	Discards any changes that have occurred since the last commit.

- Method Detail
  - prepareCommit
```
void prepareCommit()
            throws java.io.IOException
```
    The first stage of a 2-phase commit. Implementations should do as much work as possible in this method, but avoid actual committing changes. If the 2-phase commit fails, rollback() is called to discard all changes since last successful commit.
    
    Throws:
    
    java.io.IOException
  - commit
```
void commit()
     throws java.io.IOException
```
    The second phase of a 2-phase commit. Implementations should ideally do very little work in this method (following prepareCommit(), and after it returns, the caller can assume that the changes were successfully committed to the underlying storage.
    
    Throws:
    
    java.io.IOException
  - rollback
```
void rollback()
       throws java.io.IOException
```
    Discards any changes that have occurred since the last commit. In a 2-phase commit algorithm, where one of the objects failed to commit() or prepareCommit(), this method is used to roll all other objects back to their previous state.
    
    Throws:
    
    java.io.IOException