WriteListenerWrapper

java.lang.Object
- io.opencensus.contrib.http.servlet.WriteListenerWrapper

All Implemented Interfaces:

java.util.EventListener, javax.servlet.WriteListener
```
@ExperimentalApi
public class WriteListenerWrapper
extends java.lang.Object
implements javax.servlet.WriteListener
```
This class is a wrapper class for WriteListener. It facilitates executing asynchronous onWritePossible method in the original context at the time of creating the listener.

Since:

0.25.0

Field Summary

Fields
Modifier and Type Field Description

private io.grpc.Context context

private javax.servlet.WriteListener writeListener

Constructor Summary

Constructors
Constructor Description

WriteListenerWrapper(javax.servlet.WriteListener writeListener)
Creates an instance of WriteListenerWrapper.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`onError(java.lang.Throwable t)`
`void`	`onWritePossible()`	It executes onWritePossible() method of the object being wrapped in the saved context.

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

- Field Detail
  - context
```
private final io.grpc.Context context
```
  - writeListener
```
private final javax.servlet.WriteListener writeListener
```
- Constructor Detail
  - WriteListenerWrapper
```
public WriteListenerWrapper(javax.servlet.WriteListener writeListener)
```
    Creates an instance of WriteListenerWrapper. It saves current Context at the time of creation.
    
    Parameters:
    
    writeListener - WriteListener object being wrapped.
    
    Since:
    
    0.25.0
- Method Detail
  - onWritePossible
```
public void onWritePossible()
                     throws java.io.IOException
```
    It executes onWritePossible() method of the object being wrapped in the saved context. It saves current context before executing the method and restores it after it is finished executing.
    
    Specified by:
    
    onWritePossible in interface javax.servlet.WriteListener
    
    Throws:
    
    java.io.IOException
    
    Since:
    
    0.25.0
  - onError
```
public void onError(java.lang.Throwable t)
```
    Specified by:
    
    onError in interface javax.servlet.WriteListener