DataQueue (SensorML Core 1.1-beta1 API)

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java.lang.Object
- org.vast.process.DataConnection
- - org.vast.process.DataQueue

```
public class DataQueue
extends DataConnection
```
A data queue is used to send data between processes. It is synchronized to support processes in different threads, even on different computers (grid computing). Each element in the queue is called a data block. The queue can also send status values and events.

Author:

Alex Robin TODO add support for unit conversion in queues

Field Summary

Fields
Modifier and Type Field and Description

boolean repeat

int waitCount

Constructor Summary

Constructors
Constructor and Description

DataQueue()

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`add(net.opengis.swe.v20.DataBlock data)` Adds DataBlock at the end of the list
`void`	`clear()` Clear all data bocks in the queue
`net.opengis.swe.v20.DataBlock`	`get()` Default version of previous method with timeout set to 0 This will make us wait until a new value arrives on the queue
`net.opengis.swe.v20.DataBlock`	`get(long timeout)` Gets the first DataBlock from the queue
`boolean`	`isDataAvailable()`
`String`	`toString()`

Methods inherited from class org.vast.process.DataConnection
check, check, getDestinationComponent, getDestinationProcess, getProperty, getSourceComponent, getSourceProcess, setDataAvailable, setDestinationComponent, setDestinationProcess, setProperty, setSourceComponent, setSourceProcess, transferDataBlocks

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

- Field Detail
  - waitCount
```
public int waitCount
```
  - repeat
```
public boolean repeat
```
- Constructor Detail
  - DataQueue
```
public DataQueue()
```
- Method Detail
  - add
```
public void add(net.opengis.swe.v20.DataBlock data)
```
    Adds DataBlock at the end of the list
    
    Parameters:
    data -
  - get
```
public net.opengis.swe.v20.DataBlock get(long timeout)
                                  throws InterruptedException
```
    Gets the first DataBlock from the queue
    
    Parameters:
    timeout - maximum time to wait until data is available, in ms
    
    Returns:
    DataBlock or null if nothing is available after time out
    
    Throws:
    
    InterruptedException
  - get
```
public net.opengis.swe.v20.DataBlock get()
                                  throws InterruptedException
```
    Default version of previous method with timeout set to 0 This will make us wait until a new value arrives on the queue
    
    Returns:
    DataBlock or null if nothing is available
    
    Throws:
    
    InterruptedException
  - isDataAvailable
```
public boolean isDataAvailable()
```
    Overrides:
    
    isDataAvailable in class DataConnection
  - clear
```
public void clear()
```
    Clear all data bocks in the queue
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object

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Copyright © 2016 VAST Team / Sensia Software LLC. All rights reserved.