AbstractResultListener (IoTDB Server 0.14.0-preview2 API)

java.lang.Object
- org.apache.iotdb.db.wal.utils.listener.AbstractResultListener

Direct Known Subclasses:

WALFlushListener, WALRecoverListener
```
public abstract class AbstractResultListener
extends java.lang.Object
```
This abstract class aims to listen to the result of some operation.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class AbstractResultListener.Status

Field Summary

Fields
Modifier and Type	Field	Description
`protected java.lang.Exception`	`cause`
`protected AbstractResultListener.Status`	`status`
`protected boolean`	`wait`	true means waiting until getting the result

Constructor Summary

Constructors
Constructor Description

AbstractResultListener(boolean wait)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`AbstractResultListener`	`fail(java.lang.Exception e)`	Set status to failure and notify all threads waiting for the result.
`java.lang.Exception`	`getCause()`	Get the cause exception to failure.
`AbstractResultListener`	`succeed()`	Set status to success and notify all threads waiting for the result.
`AbstractResultListener.Status`	`waitForResult()`	Wait until getting the result.

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

- Field Detail
  - wait
```
protected final boolean wait
```
    true means waiting until getting the result
  - status
```
protected volatile AbstractResultListener.Status status
```
  - cause
```
protected volatile java.lang.Exception cause
```
- Constructor Detail
  - AbstractResultListener
```
public AbstractResultListener(boolean wait)
```
- Method Detail
  - succeed
```
public AbstractResultListener succeed()
```
    Set status to success and notify all threads waiting for the result.
  - fail
```
public AbstractResultListener fail(java.lang.Exception e)
```
    Set status to failure and notify all threads waiting for the result.
  - waitForResult
```
public AbstractResultListener.Status waitForResult()
```
    Wait until getting the result.
    Notice: wait only when wait status is ture.
  - getCause
```
public java.lang.Exception getCause()
```
    Get the cause exception to failure.