AbstractOffsetStore (ons-client 2.0.1.Final API)

java.lang.Object
- com.aliyun.openservices.ons.client.rocketmq.impl.AbstractOffsetStore

All Implemented Interfaces:: OffsetStore

public abstract class AbstractOffsetStore
extends Object
implements OffsetStore

Constructor Summary

Constructors
Constructor Description

AbstractOffsetStore(long persistPeriodSeconds)

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`abstract Map<TopicPartition,Long>`	`loadOffset()`	从磁盘或者其他外部存储读取位点。
`abstract void`	`persistOffset(Map<TopicPartition,Long> offsetTable)`	持久化位点到磁盘或其他外部存储介质。
`com.google.common.base.Optional<Long>`	`readOffset(TopicPartition partition)`
`void`	`shutdown()`
`void`	`start()`
`void`	`updateOffset(TopicPartition partition, long offset)`

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

- Constructor Detail
  - AbstractOffsetStore
```
public AbstractOffsetStore(long persistPeriodSeconds)
```
- Method Detail
  - start
```
public void start()
```
    Specified by:
    
    start in interface OffsetStore
  - shutdown
```
public void shutdown()
```
    Specified by:
    
    shutdown in interface OffsetStore
  - loadOffset
```
public abstract Map<TopicPartition,Long> loadOffset()
```
    从磁盘或者其他外部存储读取位点。
    
    Returns:
    
    位点存储表
  - persistOffset
```
public abstract void persistOffset(Map<TopicPartition,Long> offsetTable)
```
    持久化位点到磁盘或其他外部存储介质。
    
    Parameters:
    
    offsetTable - 位点存储表
  - updateOffset
```
public void updateOffset(TopicPartition partition,
                         long offset)
```
    Specified by:
    
    updateOffset in interface OffsetStore
  - readOffset
```
public com.google.common.base.Optional<Long> readOffset(TopicPartition partition)
```
    Specified by:
    
    readOffset in interface OffsetStore