All Implemented Interfaces:

java.util.concurrent.Callable , kotlin.Comparable
```
public abstract class Task<Result extends Object>
 implements Callable<QueueResult>, Comparable<Task<?>>
                    
```
Executable piece of work in the Queue; child classes can do any actual type of work, the Queue does not care. Defines the core principles: dependencies, priority, retry policy and id.
The generic Result is the value returned via result; use Void (or Unit) when nothing is returned. The type derives priority and the hard-dependency contract. The constructor's initialDependencies seed the dependencies set — additional ones can be added with addDependency until the task is enqueued. The constructor's taskId restricts parallel execution of tasks of the same type: two tasks with the same type and id are considered equal and the Queue (set semantics) rejects duplicates. When the id is null each task is unique — the internal creation order is used.

Field Summary

Fields
Modifier and Type	Field	Description
`private final Set<TaskType>`	`dependencies`
`private final Set<TaskType>`	`softDependencies`
`private final Integer`	`order`
`private Long`	`executionTime`
`private Throwable`	`executionError`
`private volatile Integer`	`retryCount`
`private final Result`	`result`
`private final TaskType`	`type`

Constructor Summary

Constructors
Constructor	Description
`Task(TaskType type, Array<TaskType> initialDependencies, String taskId)`
`Task(TaskType type, Array<TaskType> initialDependencies)`

Method Summary

Modifier and Type	Method	Description
`final Set<TaskType>`	`getDependencies()`
`final Set<TaskType>`	`getSoftDependencies()`
`final Integer`	`getOrder()`	Chronological order in which the task object was created.
`final Long`	`getExecutionTime()`
`final Unit`	`setExecutionTime(Long executionTime)`
`final Throwable`	`getExecutionError()`	Error which happened during task execution, or `null` if the task was successful.
`final Unit`	`setExecutionError(Throwable executionError)`
`final Integer`	`getRetryCount()`	Number of times the task was executed, INCLUDING the initial try.
`final Unit`	`setRetryCount(Integer retryCount)`
`abstract Result`	`getResult()`	Task should store result of its execution if applicable and return it via this property.
`final TaskType`	`getType()`
`final Unit`	`addDependency(TaskType dependency)`	Adds a new hard dependency to this type; duplicates are ignored.
`final Unit`	`addSoftDependency(TaskType dependency)`	Adds a new soft dependency to this type; duplicates are ignored.
`final QueueResult`	`executionResult()`	Result of execution of this task by Queue.
`final QueueResult`	`call()`
`final Integer`	`compareTo(Task<?> other)`
`final Boolean`	`equals(Object other)`
`final Integer`	`hashCode()`
`String`	`toString()`

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

- Constructor Detail
  - Task
```
Task(TaskType type, Array<TaskType> initialDependencies, String taskId)
```
  - Task
```
Task(TaskType type, Array<TaskType> initialDependencies)
```
- Method Detail
  - getDependencies
```
 final Set<TaskType> getDependencies()
```
  - getSoftDependencies
```
 final Set<TaskType> getSoftDependencies()
```
  - getOrder
```
 final Integer getOrder()
```
    Chronological order in which the task object was created. Required to support natural ordering in the Queue SkipListSet: two tasks of the same type and priority — the first one has the smaller order.
  - getExecutionTime
```
 final Long getExecutionTime()
```
  - setExecutionTime
```
 final Unit setExecutionTime(Long executionTime)
```
  - getExecutionError
```
 final Throwable getExecutionError()
```
    Error which happened during task execution, or null if the task was successful.
  - setExecutionError
```
 final Unit setExecutionError(Throwable executionError)
```
  - getRetryCount
```
 final Integer getRetryCount()
```
    Number of times the task was executed, INCLUDING the initial try. E.g. if the task succeeded on the first try this returns 1.
  - setRetryCount
```
 final Unit setRetryCount(Integer retryCount)
```
  - getResult
```
 abstract Result getResult()
```
    Task should store result of its execution if applicable and return it via this property.
  - getType
```
 final TaskType getType()
```
  - addDependency
```
 final Unit addDependency(TaskType dependency)
```
    Adds a new hard dependency to this type; duplicates are ignored.
    N.B. This will only take effect before the task is added to the Queue.
  - addSoftDependency
```
 final Unit addSoftDependency(TaskType dependency)
```
    Adds a new soft dependency to this type; duplicates are ignored. Useful, for example, when waiting for conversion to complete while there is no internet.
    N.B. This will only take effect before the task is added to the Queue.
  - executionResult
```
 final QueueResult executionResult()
```
    Result of execution of this task by Queue.
  - call
```
 final QueueResult call()
```
  - compareTo
```
 final Integer compareTo(Task<?> other)
```
  - equals
```
 final Boolean equals(Object other)
```
  - hashCode
```
 final Integer hashCode()
```
  - toString
```
 String toString()
```

Class Task

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Task

Task

Method Detail

getDependencies

getSoftDependencies

getOrder

getExecutionTime

setExecutionTime

getExecutionError

setExecutionError

getRetryCount

setRetryCount

getResult

getType

addDependency

addSoftDependency

executionResult

call

compareTo

equals

hashCode

toString