# Class LimitedTimeTransactionRerunPolicy (3.7.0-rc)

3.7.0-rc 3.6.0 (latest) 3.5.0 3.4.0 3.3.0 3.2.0 2.48.0-rc 2.47.1 2.46.0 2.45.0 2.44.0 2.43.0 2.42.0 2.41.0 2.40.0 2.39.0 2.38.0 2.37.0 2.36.0 2.35.0 2.34.0 2.33.0 2.32.0 2.31.0 2.30.0 2.29.0 2.28.0 2.27.0 2.26.0 2.25.1 2.24.0 2.23.0 2.22.1 2.21.0 2.20.0 2.19.0 2.18.0 2.17.0 2.16.0 2.15.1 2.14.0 2.13.0 2.12.0 2.11.0 A transaction rerun policy based on elapsed time.
This policy stops retrying if:

- An RPC returns a non-transient error.
- The elapsed time in the retry loop exceeds a prescribed duration.

The following status codes are treated as transient errors:

- [`kAborted`](https://docs.cloud.google.com/cpp/docs/reference/common/latest/namespacegoogle_1_1cloud_1a90e17f75452470f0f3ee1a06ffe58847.html)
- [`kNotFound`](https://docs.cloud.google.com/cpp/docs/reference/common/latest/namespacegoogle_1_1cloud_1a90e17f75452470f0f3ee1a06ffe58847.html) when the error message indicates the missing (or expired) resource is the spanner session associated with the transaction.

## Constructors

### LimitedTimeTransactionRerunPolicy(std::chrono::duration\< DurationRep, DurationPeriod \>)

Constructor given a `std::chrono::duration<>` object.

###### See Also

<https://en.cppreference.com/w/cpp/chrono/duration> for more details about `std::chrono::duration`.

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `maximum_duration` | `std::chrono::duration< DurationRep, DurationPeriod >` the maximum time allowed before the policy expires, while the application can express this time in any units they desire, the class truncates to milliseconds. |
| `typename DurationRep` | a placeholder to match the `Rep` tparam for `maximum_duration's` type. The semantics of this template parameter are documented in `std::chrono::duration<>`. In brief, the underlying arithmetic type used to store the number of ticks. For our purposes it is simply a formal parameter. |
| `typename DurationPeriod` | a placeholder to match the `Period` tparam for `maximum_duration's` type. The semantics of this template parameter are documented in `std::chrono::duration<>`. In brief, the length of the tick in seconds, expressed as a `std::ratio<>`. For our purposes it is simply a formal parameter. |

### LimitedTimeTransactionRerunPolicy(LimitedTimeTransactionRerunPolicy \&\&)

| **Parameter** ||
|---|---|
| **Name** | **Description** |
| `rhs` | `LimitedTimeTransactionRerunPolicy &&` |

### LimitedTimeTransactionRerunPolicy(LimitedTimeTransactionRerunPolicy const \&)

| **Parameter** ||
|---|---|
| **Name** | **Description** |
| `rhs` | `LimitedTimeTransactionRerunPolicy const &` |

## Functions

### maximum_duration() const

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `std::chrono::milliseconds` |   |

### virtual OnFailure(Status const \&)

| **Parameter** ||
|---|---|
| **Name** | **Description** |
| `s` | `Status const &` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `bool` |   |

### virtual IsExhausted() const

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `bool` |   |

### virtual IsPermanentFailure(Status const \&) const

| **Parameter** ||
|---|---|
| **Name** | **Description** |
| `s` | `Status const &` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `bool` |   |

### virtual clone() const

Creates a new instance of the policy, reset to the initial state.

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `std::unique_ptr< TransactionRerunPolicy >` |   |

## Type Aliases

### BaseType

**Alias Of** : `RetryPolicy`