com.streambase.liveview.client

Interface SnapshotResult

All Superinterfaces:

java.lang.AutoCloseable, java.io.Closeable

All Known Implementing Classes:

DeleteQueryListener, SnapshotQueryListener

public interface SnapshotResult
extends java.io.Closeable

A blocking iterator pattern for retrieving snapshot only results.

Since:

2.0 SnapshotResult extends Iterable<Tuple>

Method Summary

Modifier and Type	Method and Description
void	close() closes any resource associated with the snapshot result
java.util.List<Schema.Field>	getFields() Retrieves the fields describing the tuples that will be returned.
boolean	hasNext() See if there are more tuples to retrieve.
Tuple	next() Retrieves the next tuple in the result.

Method Detail

hasNext

boolean hasNext()
         throws LiveViewException

See if there are more tuples to retrieve. If there are not currently any Tuples waiting to be read, this will block until either the next Tuple or the Snapshot end arrives.

Returns:

true if more tuples exist in result

Throws:

LiveViewException

next

Tuple next()
    throws LiveViewException,
           java.util.NoSuchElementException

Retrieves the next tuple in the result. If there are not currently any Tuples waiting to be read, this will block until either the next Tuple or the Snapshot end arrives.

Returns:

the next tuple

Throws:

LiveViewException - if exception occurs on the Query

java.util.NoSuchElementException - if no more tuples exist to retrieve

getFields

java.util.List<Schema.Field> getFields()
                                throws LiveViewException

Retrieves the fields describing the tuples that will be returned.

Returns:

the fields describing the tuples

Throws:

LiveViewException - if exception occurs on the Query

close

void close()

closes any resource associated with the snapshot result

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface java.io.Closeable