QueueInputStream (The Adobe AEM Quickstart and Web Application. 6.6.0)

java.lang.Object
- java.io.InputStream
- - org.apache.commons.io.input.QueueInputStream

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable
```
public class QueueInputStream
extends java.io.InputStream
```
Simple alternative to JDK PipedInputStream; queue input stream provides what's written in queue output stream.
To build an instance, use QueueInputStream.Builder.

Example usage:
```
 QueueInputStream inputStream = new QueueInputStream();
 QueueOutputStream outputStream = inputStream.newQueueOutputStream();

 outputStream.write("hello world".getBytes(UTF_8));
 inputStream.read();
 
```
Unlike JDK PipedInputStream and PipedOutputStream, queue input/output streams may be used safely in a single thread or multiple threads. Also, unlike JDK classes, no special meaning is attached to initial or current thread. Instances can be used longer after initial threads exited.

Closing a QueueInputStream has no effect. The methods in this class can be called after the stream has been closed without generating an IOException.
Since:

2.9.0

See Also:

QueueInputStream.Builder, QueueOutputStream

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class QueueInputStream.Builder
Builds a new QueueInputStream.

Constructor Summary

Constructors
Constructor	Description
`QueueInputStream()`	Constructs a new instance with no limit to its internal queue size and zero timeout.
`QueueInputStream(java.util.concurrent.BlockingQueue<java.lang.Integer> blockingQueue)`	Deprecated. Use `builder()`, `QueueInputStream.Builder`, and `QueueInputStream.Builder.get()`.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static QueueInputStream.Builder`	`builder()`	Constructs a new `QueueInputStream.Builder`.
`QueueOutputStream`	`newQueueOutputStream()`	Constructs a new QueueOutputStream instance connected to this.
`int`	`read()`	Reads and returns a single byte.

Methods inherited from class java.io.InputStream
available, close, mark, markSupported, nullInputStream, read, read, readAllBytes, readNBytes, readNBytes, reset, skip, transferTo

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

- Constructor Detail
  - QueueInputStream
```
public QueueInputStream()
```
    Constructs a new instance with no limit to its internal queue size and zero timeout.
  - QueueInputStream
```
@Deprecated
public QueueInputStream(java.util.concurrent.BlockingQueue<java.lang.Integer> blockingQueue)
```
    Deprecated.
    Use builder(), QueueInputStream.Builder, and QueueInputStream.Builder.get().
    
    Constructs a new instance with given queue and zero timeout.
    
    Parameters:
    
    blockingQueue - backing queue for the stream.
- Method Detail
  - builder
```
public static QueueInputStream.Builder builder()
```
    Constructs a new QueueInputStream.Builder.
    
    Returns:
    
    a new QueueInputStream.Builder.
    
    Since:
    
    2.12.0
  - newQueueOutputStream
```
public QueueOutputStream newQueueOutputStream()
```
    Constructs a new QueueOutputStream instance connected to this. Writes to the output stream will be visible to this input stream.
    
    Returns:
    
    QueueOutputStream connected to this stream.
  - read
```
public int read()
```
    Reads and returns a single byte.
    
    Specified by:
    
    read in class java.io.InputStream
    
    Returns:
    
    the byte read, or -1 if a timeout occurs before a queue element is available.
    
    Throws:
    
    java.lang.IllegalStateException - if thread is interrupted while waiting.