E- The type of entity accepted by this writer.
@NotThreadSafe public interface DatasetWriter<E> extends Closeable
A stream-oriented dataset writer.
Implementations of this interface write data to a
Writers are use-once objects that serialize entities of type
write them to the underlying storage system. Normally, you are
not expected to instantiate implementations directly. Instead, use the
View.newWriter() method to get an appropriate
implementation. You should receive an instance of this interface from a
close() when they are done,
or no more data exists.
Implementations can hold system resources until the
is called, so you must follow the normal try / finally
pattern to ensure these resources are properly freed when the writer is no
longer needed. Do not rely on implementations automatically invoking the
close method upon object finalization (implementations must not do
so). All implementations must silently ignore multiple invocations of
close as well as a close of an unopened writer.
If any method throws an exception other than
the writer is no longer valid, and the only method that can be subsequently
DatasetWriter are typically not thread-safe; that
is, the behavior when accessing a single instance from multiple threads is
void write(E entity)
Write an entity to the underlying dataset.
If any exception other than
DatasetRecordException is thrown, this
writer is no longer valid and should be closed.
Close the writer and release any system resources. If this method returns without
throwing an exception then any entity that was successfully written with
write(Object) will be stored to stable storage.
No further operations of this interface (other than additional calls to this method) can be performed; however, implementations can choose to permit other method calls. See implementation documentation for details.
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