RetryFilter (Carrot Task Queue 2.0.2 API)

java.lang.Object
- cn.boboweike.carrot.tasks.filters.RetryFilter

All Implemented Interfaces:

ElectStateFilter, TaskFilter
```
public class RetryFilter
extends Object
implements ElectStateFilter
```
A TaskFilter of type ElectStateFilter that will retry the task if it fails for up to 10 times with an exponential back-off policy. This TaskFilter is added by default in Carrot.
If you want to configure the amount of retries, create a new instance and pass it to the CarrotConfiguration, e.g.:
```
     Carrot.configure()
                 ...
                 .withTaskFilter(new RetryFilter(20, 4)) // this will result in 20 retries and the retries will happen after 4 seconds, 16 seconds, 64 seconds, ...
                 ...
                 .initialize();
 
```

Field Summary

Fields
Modifier and Type Field Description

static int DEFAULT_BACKOFF_POLICY_TIME_SEED

static int DEFAULT_NBR_OF_RETRIES

Constructor Summary

Constructors
Constructor Description

RetryFilter()

RetryFilter(int numberOfRetries)

RetryFilter(int numberOfRetries, int backOffPolicyTimeSeed)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected long`	`getExponentialBackoffPolicy(Task task, int seed)`
`protected long`	`getSecondsToAdd(Task task)`
`void`	`onStateElection(Task task, TaskState newState)`

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

Field Detail
- DEFAULT_BACKOFF_POLICY_TIME_SEED
```
public static final int DEFAULT_BACKOFF_POLICY_TIME_SEED
```
  See Also:
  
  Constant Field Values
- DEFAULT_NBR_OF_RETRIES
```
public static final int DEFAULT_NBR_OF_RETRIES
```
  See Also:
  
  Constant Field Values

Constructor Detail

RetryFilter
```
public RetryFilter()
```

RetryFilter

public RetryFilter(int numberOfRetries)

RetryFilter

public RetryFilter(int numberOfRetries,
                   int backOffPolicyTimeSeed)

Method Detail

onStateElection

public void onStateElection(Task task,
                            TaskState newState)

Specified by:: onStateElection in interface ElectStateFilter

getSecondsToAdd

protected long getSecondsToAdd(Task task)

getExponentialBackoffPolicy

protected long getExponentialBackoffPolicy(Task task,
                                           int seed)