SequenceDb (tempdb 1.0 API)

java.lang.Object
- sk.antons.tempdb.base.AbstractDb
- - sk.antons.tempdb.sequence.SequenceDb<T>

```
public class SequenceDb<T>
extends AbstractDb
```
Sequence (FIFO) type of database. Data are stored and read simultaneously.

Author:

antons

Field Summary

Fields
Modifier and Type	Field	Description
`protected BytesDeserializer<T>`	`deserializer`
`protected long`	`index`
`protected RandomAccessFile`	`raf`
`protected BytesSerializer<T>`	`serializer`
`protected long`	`size`

Fields inherited from class sk.antons.tempdb.base.AbstractDb
dbfile

Constructor Summary

Constructors
Constructor Description

SequenceDb(DbFile dbfile, BytesSerializer<T> serializer, BytesDeserializer<T> deserializer)
Creates new database

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`add(T value)`	Add new value to end position
`void`	`close()`	Closes resources used by this db.
`T`	`next()`	Reads next value from first unread position

Methods inherited from class sk.antons.tempdb.base.AbstractDb
dbfile, delete

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

Field Detail

serializer

protected BytesSerializer<T> serializer

deserializer

protected BytesDeserializer<T> deserializer

raf
```
protected RandomAccessFile raf
```

index
```
protected long index
```

size
```
protected long size
```

Constructor Detail

SequenceDb

public SequenceDb(DbFile dbfile,
                  BytesSerializer<T> serializer,
                  BytesDeserializer<T> deserializer)

Creates new database

Parameters:: dbfile -; serializer -; deserializer -

Method Detail
- close
```
public void close()
```
  Description copied from class: AbstractDb
  
  Closes resources used by this db.
  
  Specified by:
  
  close in class AbstractDb
- add
```
public void add(T value)
```
  Add new value to end position
  
  Parameters:
  
  value -
- next
```
public T next()
```
  Reads next value from first unread position
  
  Returns:
  
  value or null if no value exists