org.apache.flink.streaming.api.functions.source.datagen

接口 DataGenerator<T>

所有超级接口:

Iterator<T>, Serializable

所有已知实现类:

RandomGenerator, SequenceGenerator

@Experimental
public interface DataGenerator<T>
extends Serializable, Iterator<T>

Stateful and re-scalable data generator.

方法概要

限定符和类型	方法和说明
void	open(String name, org.apache.flink.runtime.state.FunctionInitializationContext context, org.apache.flink.api.common.functions.RuntimeContext runtimeContext) Open and initialize state for DataGenerator.
default void	snapshotState(org.apache.flink.runtime.state.FunctionSnapshotContext context) Snapshot state for DataGenerator.

从接口继承的方法 java.util.Iterator

forEachRemaining, hasNext, next, remove

方法详细资料

open

void open(String name,
          org.apache.flink.runtime.state.FunctionInitializationContext context,
          org.apache.flink.api.common.functions.RuntimeContext runtimeContext)
   throws Exception

Open and initialize state for DataGenerator. See CheckpointedFunction.initializeState(org.apache.flink.runtime.state.FunctionInitializationContext).

参数:

name - The state of DataGenerator should related to this name, make sure the name of state is different.

抛出:

Exception

snapshotState

default void snapshotState(org.apache.flink.runtime.state.FunctionSnapshotContext context)
                    throws Exception

Snapshot state for DataGenerator. See CheckpointedFunction.snapshotState(org.apache.flink.runtime.state.FunctionSnapshotContext).

抛出:

Exception