JournalQueue (FFMQ Core 4.0.13 API)

java.lang.Object
- net.timewalker.ffmq4.storage.data.impl.journal.JournalQueue

public final class JournalQueue
extends Object

FIFO queue of AbstractJournalOperation objects

Constructor Summary

Constructors
Constructor Description

JournalQueue()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addLast(AbstractJournalOperation op)`	Append an operation at the end of the queue
`AbstractJournalOperation`	`getFirst()`	Return the first operation in queue
`void`	`migrateTo(JournalQueue otherQueue)`	Migrate all operations to the given target queue
`AbstractJournalOperation`	`removeFirst()`	Remove the first available journal operation in queue
`int`	`size()`	Get the queue size

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

- Constructor Detail
  - JournalQueue
```
public JournalQueue()
```
- Method Detail
  - getFirst
```
public AbstractJournalOperation getFirst()
```
    Return the first operation in queue
    
    Returns:
    
    the first operation in queue
  - addLast
```
public void addLast(AbstractJournalOperation op)
```
    Append an operation at the end of the queue
    
    Parameters:
    
    op - a journal operation
  - removeFirst
```
public AbstractJournalOperation removeFirst()
```
    Remove the first available journal operation in queue
    
    Returns:
    
    a journal operation
    
    Throws:
    
    NoSuchElementException - if queue is empty
  - migrateTo
```
public void migrateTo(JournalQueue otherQueue)
```
    Migrate all operations to the given target queue
    
    Parameters:
    
    otherQueue - target journal queue
  - size
```
public int size()
```
    Get the queue size
    
    Returns:
    
    number of operations in queue