UserRowSync (GeoPackage Core 6.6.7 API)

java.lang.Object
- mil.nga.geopackage.user.UserRowSync<TColumn,TTable,TRow>

Type Parameters:

TColumn - column type

TTable - table type

TRow - row type
```
public class UserRowSync<TColumn extends UserColumn,TTable extends UserTable<TColumn>,TRow extends UserCoreRow<TColumn,TTable>>
extends Object
```
User Row Sync to support sharing a single user row read copy when multiple near simultaneous asynchronous requests are made

Since:

2.0.0

Author:

osbornb

Nested Class Summary

Nested Classes
Modifier and Type Class Description

protected class UserRowSync.RowCondition
Condition and row wrapper

Field Summary

Fields
Modifier and Type Field Description

protected Lock lock
Synchronous lock

protected Map<Long,UserRowSync.RowCondition> rows
Mapping between row ids and row conditions

Constructor Summary

Constructors
Modifier Constructor Description

protected UserRowSync()
Constructor

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`TRow`	`getRowOrLock(long id)`	Get the row if another same id request has been made by waiting until the row has been set.
`void`	`setRow(long id, TRow row)`	Set the row id, row, and notify all waiting threads to retrieve the row.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - lock
```
protected Lock lock
```
    Synchronous lock
  - rows
```
protected Map<Long,UserRowSync.RowCondition> rows
```
    Mapping between row ids and row conditions
- Constructor Detail
  - UserRowSync
```
protected UserRowSync()
```
    Constructor
- Method Detail
  - getRowOrLock
```
public TRow getRowOrLock(long id)
```
    Get the row if another same id request has been made by waiting until the row has been set. If no current request, lock the for the calling thread which should read the row and call setRow(long, UserCoreRow) when complete.
    
    Parameters:
    
    id - user row id
    
    Returns:
    
    row if retrieved from a previous request, null if calling thread should read row and set using setRow(long, UserCoreRow)
  - setRow
```
public void setRow(long id,
                   TRow row)
```
    Set the row id, row, and notify all waiting threads to retrieve the row.
    
    Parameters:
    
    id - user row id
    
    row - user row or null