StreamingQuery (Spark 3.0.0-preview JavaDoc)

```
public interface StreamingQuery
```
A handle to a query that is executing continuously in the background as new data arrives. All these methods are thread-safe.

Since:

2.0.0

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`void`	`awaitTermination()` Waits for the termination of `this` query, either by `query.stop()` or by an exception.
`boolean`	`awaitTermination(long timeoutMs)` Waits for the termination of `this` query, either by `query.stop()` or by an exception.
`scala.Option<StreamingQueryException>`	`exception()` Returns the `StreamingQueryException` if the query was terminated by an exception.
`void`	`explain()` Prints the physical plan to the console for debugging purposes.
`void`	`explain(boolean extended)` Prints the physical plan to the console for debugging purposes.
`java.util.UUID`	`id()` Returns the unique id of this query that persists across restarts from checkpoint data.
`boolean`	`isActive()` Returns `true` if this query is actively running.
`StreamingQueryProgress`	`lastProgress()` Returns the most recent `StreamingQueryProgress` update of this streaming query.
`String`	`name()` Returns the user-specified name of the query, or null if not specified.
`void`	`processAllAvailable()` Blocks until all available data in the source has been processed and committed to the sink.
`StreamingQueryProgress[]`	`recentProgress()` Returns an array of the most recent `StreamingQueryProgress` updates for this query.
`java.util.UUID`	`runId()` Returns the unique id of this run of the query.
`SparkSession`	`sparkSession()` Returns the `SparkSession` associated with `this`.
`StreamingQueryStatus`	`status()` Returns the current status of the query.
`void`	`stop()` Stops the execution of this query if it is running.

- Method Detail
  - awaitTermination
```
void awaitTermination()
               throws StreamingQueryException
```
    Waits for the termination of this query, either by query.stop() or by an exception. If the query has terminated with an exception, then the exception will be thrown.
    If the query has terminated, then all subsequent calls to this method will either return immediately (if the query was terminated by stop()), or throw the exception immediately (if the query has terminated with exception).
    
    Throws:
    
    StreamingQueryException - if the query has terminated with an exception.
    
    Since:
    
    2.0.0
  - awaitTermination
```
boolean awaitTermination(long timeoutMs)
                  throws StreamingQueryException
```
    Waits for the termination of this query, either by query.stop() or by an exception. If the query has terminated with an exception, then the exception will be thrown. Otherwise, it returns whether the query has terminated or not within the timeoutMs milliseconds.
    If the query has terminated, then all subsequent calls to this method will either return true immediately (if the query was terminated by stop()), or throw the exception immediately (if the query has terminated with exception).
    
    Parameters:
    
    timeoutMs - (undocumented)
    
    Returns:
    
    (undocumented)
    
    Throws:
    
    StreamingQueryException - if the query has terminated with an exception
    
    Since:
    
    2.0.0
  - exception
```
scala.Option<StreamingQueryException> exception()
```
    Returns the StreamingQueryException if the query was terminated by an exception.
    
    Returns:
    
    (undocumented)
    
    Since:
    
    2.0.0
  - explain
```
void explain()
```
    Prints the physical plan to the console for debugging purposes.
    
    Since:
    
    2.0.0
  - explain
```
void explain(boolean extended)
```
    Prints the physical plan to the console for debugging purposes.
    
    Parameters:
    
    extended - whether to do extended explain or not
    
    Since:
    
    2.0.0
  - id
```
java.util.UUID id()
```
    Returns the unique id of this query that persists across restarts from checkpoint data. That is, this id is generated when a query is started for the first time, and will be the same every time it is restarted from checkpoint data. Also see runId.
    
    Returns:
    
    (undocumented)
    
    Since:
    
    2.1.0
  - isActive
```
boolean isActive()
```
    Returns true if this query is actively running.
    
    Returns:
    
    (undocumented)
    
    Since:
    
    2.0.0
  - lastProgress
```
StreamingQueryProgress lastProgress()
```
    Returns the most recent StreamingQueryProgress update of this streaming query.
    
    Returns:
    
    (undocumented)
    
    Since:
    
    2.1.0
  - name
```
String name()
```
    Returns the user-specified name of the query, or null if not specified. This name can be specified in the org.apache.spark.sql.streaming.DataStreamWriter as dataframe.writeStream.queryName("query").start(). This name, if set, must be unique across all active queries.
    
    Returns:
    
    (undocumented)
    
    Since:
    
    2.0.0
  - processAllAvailable
```
void processAllAvailable()
```
    Blocks until all available data in the source has been processed and committed to the sink. This method is intended for testing. Note that in the case of continually arriving data, this method may block forever. Additionally, this method is only guaranteed to block until data that has been synchronously appended data to a org.apache.spark.sql.execution.streaming.Source prior to invocation. (i.e. getOffset must immediately reflect the addition).
    
    Since:
    
    2.0.0
  - recentProgress
```
StreamingQueryProgress[] recentProgress()
```
    Returns an array of the most recent StreamingQueryProgress updates for this query. The number of progress updates retained for each stream is configured by Spark session configuration spark.sql.streaming.numRecentProgressUpdates.
    
    Returns:
    
    (undocumented)
    
    Since:
    
    2.1.0
  - runId
```
java.util.UUID runId()
```
    Returns the unique id of this run of the query. That is, every start/restart of a query will generated a unique runId. Therefore, every time a query is restarted from checkpoint, it will have the same id but different runIds.
    
    Returns:
    
    (undocumented)
  - sparkSession
```
SparkSession sparkSession()
```
    Returns the SparkSession associated with this.
    
    Returns:
    
    (undocumented)
    
    Since:
    
    2.0.0
  - status
```
StreamingQueryStatus status()
```
    Returns the current status of the query.
    
    Returns:
    
    (undocumented)
    
    Since:
    
    2.0.2
  - stop
```
void stop()
```
    Stops the execution of this query if it is running. This method blocks until the threads performing execution has stopped.
    
    Since:
    
    2.0.0

Interface StreamingQuery

Method Summary

Method Detail

awaitTermination

awaitTermination

exception

explain

explain

id

isActive

lastProgress

name

processAllAvailable

recentProgress

runId

sparkSession

status

stop