/** Writes the {@code Context} to the given state checkpoint output. */
protected void writeToState(StateBackend.CheckpointStateOutputView out) throws IOException {
keySerializer.serialize(key, out);
windowSerializer.serialize(window, out);
out.writeLong(watermarkTimer);
out.writeLong(processingTimeTimer);
byte[] serializedState = InstantiationUtil.serializeObject(state);
out.writeInt(serializedState.length);
out.write(serializedState, 0, serializedState.length);
MultiplexingStreamRecordSerializer<IN> recordSerializer =
new MultiplexingStreamRecordSerializer<>(inputSerializer);
out.writeInt(windowBuffer.size());
for (StreamRecord<IN> element : windowBuffer.getElements()) {
recordSerializer.serialize(element, out);
}
}
/**
* Constructs a new {@code Context} by reading from a {@link DataInputView} that contains a
* serialized context that we wrote in {@link
* #writeToState(StateBackend.CheckpointStateOutputView)}
*/
@SuppressWarnings("unchecked")
protected Context(DataInputView in, ClassLoader userClassloader) throws Exception {
this.key = keySerializer.deserialize(in);
this.window = windowSerializer.deserialize(in);
this.watermarkTimer = in.readLong();
this.processingTimeTimer = in.readLong();
int stateSize = in.readInt();
byte[] stateData = new byte[stateSize];
in.read(stateData);
state = InstantiationUtil.deserializeObject(stateData, userClassloader);
this.windowBuffer = windowBufferFactory.create();
int numElements = in.readInt();
MultiplexingStreamRecordSerializer<IN> recordSerializer =
new MultiplexingStreamRecordSerializer<>(inputSerializer);
for (int i = 0; i < numElements; i++) {
windowBuffer.storeElement(recordSerializer.deserialize(in).<IN>asRecord());
}
}