java.lang.Object
- org.springframework.util.backoff.ExponentialBackOff

所有已实现的接口:
BackOff
```
public class ExponentialBackOff
extends Object
implements BackOff
```
Implementation of BackOff that increases the back off period for each retry attempt. When the interval has reached the max interval, it is no longer increased. Stops retrying once the max elapsed time has been reached.
Example: The default interval is 2000L ms, the default multiplier is 1.5, and the default max interval is 30000L. For 10 attempts the sequence will be as follows:
```
 request#     back off

  1              2000
  2              3000
  3              4500
  4              6750
  5             10125
  6             15187
  7             22780
  8             30000
  9             30000
 10             30000
 
```
Note that the default max elapsed time is Long.MAX_VALUE. Use setMaxElapsedTime(long) to limit the maximum length of time that an instance should accumulate before returning BackOffExecution.STOP.
从以下版本开始:
4.1
作者:
Stephane Nicoll

字段概要

字段
修饰符和类型	字段	说明
`static long`	`DEFAULT_INITIAL_INTERVAL`	The default initial interval.
`static long`	`DEFAULT_MAX_ELAPSED_TIME`	The default maximum elapsed time.
`static long`	`DEFAULT_MAX_INTERVAL`	The default maximum back off time.
`static double`	`DEFAULT_MULTIPLIER`	The default multiplier (increases the interval by 50%).

构造器概要

构造器
构造器	说明
`ExponentialBackOff()`	Create an instance with the default settings.
`ExponentialBackOff(long initialInterval, double multiplier)`	Create an instance with the supplied settings.

方法概要

所有方法实例方法具体方法
修饰符和类型	方法	说明
`long`	`getInitialInterval()`	Return the initial interval in milliseconds.
`long`	`getMaxElapsedTime()`	Return the maximum elapsed time in milliseconds after which a call to `BackOffExecution.nextBackOff()` returns `BackOffExecution.STOP`.
`long`	`getMaxInterval()`	Return the maximum back off time.
`double`	`getMultiplier()`	Return the value to multiply the current interval by for each retry attempt.
`void`	`setInitialInterval(long initialInterval)`	The initial interval in milliseconds.
`void`	`setMaxElapsedTime(long maxElapsedTime)`	The maximum elapsed time in milliseconds after which a call to `BackOffExecution.nextBackOff()` returns `BackOffExecution.STOP`.
`void`	`setMaxInterval(long maxInterval)`	The maximum back off time.
`void`	`setMultiplier(double multiplier)`	The value to multiply the current interval by for each retry attempt.
`BackOffExecution`	`start()`	Start a new back off execution.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - DEFAULT_INITIAL_INTERVAL
```
public static final long DEFAULT_INITIAL_INTERVAL
```
    The default initial interval.
    另请参阅:
    常量字段值
  - DEFAULT_MULTIPLIER
```
public static final double DEFAULT_MULTIPLIER
```
    The default multiplier (increases the interval by 50%).
    另请参阅:
    常量字段值
  - DEFAULT_MAX_INTERVAL
```
public static final long DEFAULT_MAX_INTERVAL
```
    The default maximum back off time.
    另请参阅:
    常量字段值
  - DEFAULT_MAX_ELAPSED_TIME
```
public static final long DEFAULT_MAX_ELAPSED_TIME
```
    The default maximum elapsed time.
    另请参阅:
    常量字段值
- 构造器详细资料
  - ExponentialBackOff
```
public ExponentialBackOff()
```
    Create an instance with the default settings.
    另请参阅:
    DEFAULT_INITIAL_INTERVAL, DEFAULT_MULTIPLIER, DEFAULT_MAX_INTERVAL, DEFAULT_MAX_ELAPSED_TIME
  - ExponentialBackOff
```
public ExponentialBackOff(long initialInterval,
                          double multiplier)
```
    Create an instance with the supplied settings.
    参数:
    initialInterval - the initial interval in milliseconds
    multiplier - the multiplier (should be greater than or equal to 1)
- 方法详细资料
  - setInitialInterval
```
public void setInitialInterval(long initialInterval)
```
    The initial interval in milliseconds.
  - getInitialInterval
```
public long getInitialInterval()
```
    Return the initial interval in milliseconds.
  - setMultiplier
```
public void setMultiplier(double multiplier)
```
    The value to multiply the current interval by for each retry attempt.
  - getMultiplier
```
public double getMultiplier()
```
    Return the value to multiply the current interval by for each retry attempt.
  - setMaxInterval
```
public void setMaxInterval(long maxInterval)
```
    The maximum back off time.
  - getMaxInterval
```
public long getMaxInterval()
```
    Return the maximum back off time.
  - setMaxElapsedTime
```
public void setMaxElapsedTime(long maxElapsedTime)
```
    The maximum elapsed time in milliseconds after which a call to BackOffExecution.nextBackOff() returns BackOffExecution.STOP.
  - getMaxElapsedTime
```
public long getMaxElapsedTime()
```
    Return the maximum elapsed time in milliseconds after which a call to BackOffExecution.nextBackOff() returns BackOffExecution.STOP.
  - start
```
public BackOffExecution start()
```
    从接口复制的说明: BackOff
    Start a new back off execution.
    指定者:
    start 在接口中 BackOff
    返回:
    a fresh BackOffExecution ready to be used

类 ExponentialBackOff

字段概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

DEFAULT_INITIAL_INTERVAL

DEFAULT_MULTIPLIER

DEFAULT_MAX_INTERVAL

DEFAULT_MAX_ELAPSED_TIME

构造器详细资料

ExponentialBackOff

ExponentialBackOff

方法详细资料

setInitialInterval

getInitialInterval

setMultiplier

getMultiplier

setMaxInterval

getMaxInterval

setMaxElapsedTime

getMaxElapsedTime

start