org.apache.druid.frame.processor

Interface OutputChannelFactory

All Known Implementing Classes:

BlockingQueueOutputChannelFactory, ComposingOutputChannelFactory, FileOutputChannelFactory

public interface OutputChannelFactory

Factory for generating channel pairs for output data from processors.

Method Summary

Modifier and Type	Method and Description
OutputChannel	openChannel(int partitionNumber) Create a channel pair tagged with a particular partition number.
OutputChannel	openNilChannel(int partitionNumber) Create a non-writable, always-empty channel pair tagged with a particular partition number.
PartitionedOutputChannel	openPartitionedChannel(String name, boolean deleteAfterRead) Create a channel pair tagged with a particular name and a flag to delete the channel data after its read.

Method Detail

openChannel

OutputChannel openChannel(int partitionNumber)
                   throws IOException

Create a channel pair tagged with a particular partition number.

Throws:

IOException

openPartitionedChannel

PartitionedOutputChannel openPartitionedChannel(String name,
                                                boolean deleteAfterRead)
                                         throws IOException

Create a channel pair tagged with a particular name and a flag to delete the channel data after its read.

Throws:

IOException

openNilChannel

OutputChannel openNilChannel(int partitionNumber)

Create a non-writable, always-empty channel pair tagged with a particular partition number. Calling OutputChannel.getWritableChannel() on this nil channel pair will result in an error. Calling OutputChannel.getReadableChannel() will return an empty channel.