Package com.streambase.sb.unittest

Interface Dequeuer

public interface Dequeuer

A Dequeuer is used for dequeueing tuples from a specific stream.

Since:

6.6

Field Summary

Fields

Modifier and Type	Field	Description
static final long	DEFAULT_TIMEOUT	The default timeout value: 3
static final TimeUnit	DEFAULT_TIMEOUT_UNIT	The default timeout units: TimeUnit.SECONDS

Method Summary

Modifier and Type	Method	Description
List<Tuple>	dequeue(int numTuples)	Try to dequeue tuples with the DEFAULT_TIMEOUT and DEFAULT_TIMEOUT_UNIT if numTuples == 0 will return immediately if numTuples < 0 will wait the maximum timeout before returning
List<Tuple>	dequeue(int numTuples, long timeout, TimeUnit timeUnit)	Try to dequeue tuples within a provided timeout.
void	drain()	Drain any tuples that are currently in flight in the server.
Schema	getSchema()	Get the Schema for the associated stream. Equivalent to getStreamProperties().getSchema()
StreamProperties	getStreamProperties()	Get the StreamProperties for the associated stream.

Field Details

DEFAULT_TIMEOUT

static final long DEFAULT_TIMEOUT

The default timeout value: 3

See Also:

• Constant Field Values

DEFAULT_TIMEOUT_UNIT

static final TimeUnit DEFAULT_TIMEOUT_UNIT

The default timeout units: TimeUnit.SECONDS

Method Details

getStreamProperties

StreamProperties getStreamProperties()

Get the StreamProperties for the associated stream.

Returns:

Stream properties

getSchema

Schema getSchema()

Get the Schema for the associated stream.
Equivalent to getStreamProperties().getSchema()

Returns:

Schema

dequeue

List<Tuple> dequeue(int numTuples)
             throws StreamBaseException

Try to dequeue tuples with the DEFAULT_TIMEOUT and DEFAULT_TIMEOUT_UNIT

• if numTuples == 0 will return immediately
• if numTuples < 0 will wait the maximum timeout before returning

Parameters:

numTuples - the number of tuples to dequeue

Returns:

all of the tuples dequeued before the timeout, possibly an empty list

Throws:

StreamBaseException - Dequeue failed

dequeue

List<Tuple> dequeue(int numTuples,
 long timeout,
 TimeUnit timeUnit)
             throws StreamBaseException

Try to dequeue tuples within a provided timeout.

• if numTuples == 0 will return immediately
• if numTuples < 0 will wait the maximum timeout before returning

Parameters:

numTuples - the number of tuples to dequeue

timeout - the maximum time to wait

timeUnit - the time unit of timeout argument

Returns:

all of the tuples dequeued before the timeout, possibly an empty list

Throws:

StreamBaseException - Dequeue failed

drain

void drain()
    throws StreamBaseException

Drain any tuples that are currently in flight in the server. This method should not normally be called, but is provided to speed up things that expect no output.

Throws:

StreamBaseException - Drain failed