Xid (Java SE 12 & JDK 12 )

```
public interface Xid
```
The Xid interface is a Java mapping of the X/Open transaction identifier XID structure. This interface specifies three accessor methods to retrieve a global transaction format ID, global transaction ID, and branch qualifier. The Xid interface is used by the transaction manager and the resource managers. This interface is not visible to the application programs.

Since:

1.4

Field Summary

Fields
Modifier and Type	Field	Description
`static int`	`MAXBQUALSIZE`	Maximum number of bytes returned by `getBranchQualifier()`.
`static int`	`MAXGTRIDSIZE`	Maximum number of bytes returned by `getGlobalTransactionId()`.

Method Summary

Modifier and Type	Method	Description
`byte[]`	`getBranchQualifier()`	Obtain the transaction branch identifier part of XID as an array of bytes.
`int`	`getFormatId()`	Obtain the format identifier part of the XID.
`byte[]`	`getGlobalTransactionId()`	Obtain the global transaction identifier part of XID as an array of bytes.

- Field Detail
  - MAXGTRIDSIZE
```
static final int MAXGTRIDSIZE
```
    Maximum number of bytes returned by getGlobalTransactionId().
    
    See Also:
    
    Constant Field Values
  - MAXBQUALSIZE
```
static final int MAXBQUALSIZE
```
    Maximum number of bytes returned by getBranchQualifier().
    
    See Also:
    
    Constant Field Values
- Method Detail
  - getFormatId
```
int getFormatId()
```
    Obtain the format identifier part of the XID.
    
    Returns:
    
    Format identifier. O means the OSI CCR format.
  - getGlobalTransactionId
```
byte[] getGlobalTransactionId()
```
    Obtain the global transaction identifier part of XID as an array of bytes.
    
    Returns:
    
    Global transaction identifier.
  - getBranchQualifier
```
byte[] getBranchQualifier()
```
    Obtain the transaction branch identifier part of XID as an array of bytes.
    
    Returns:
    
    Global transaction identifier.