Package datahub.client

Interface Emitter

All Superinterfaces:

java.lang.AutoCloseable, java.io.Closeable

All Known Implementing Classes:

FileEmitter, KafkaEmitter, RestEmitter

@ThreadSafe
public interface Emitter
extends java.io.Closeable

An interface implemented by all metadata emitters to DataHub. Typical usage: 1. Construct the emitter using the native constructor or builder for the Emitter. 2. Call `emitter.emit(mcpw, callback)` for each event you want to send 3. Wait for all events to be sent by inspecting the futures returned by each call or using callbacks 4. Call `emitter.close()` to finalize.

Method Summary

Modifier and Type	Method	Description
default java.util.concurrent.Future<MetadataWriteResponse>	emit(com.linkedin.mxe.MetadataChangeProposal mcp)	Asynchronously emit a MetadataChangeProposal event.
java.util.concurrent.Future<MetadataWriteResponse>	emit(com.linkedin.mxe.MetadataChangeProposal mcp, Callback callback)	Asynchronously emit a MetadataChangeProposal event.
default java.util.concurrent.Future<MetadataWriteResponse>	emit(MetadataChangeProposalWrapper mcpw)	Asynchronously emit a MetadataChangeProposalWrapper event.
java.util.concurrent.Future<MetadataWriteResponse>	emit(MetadataChangeProposalWrapper mcpw, Callback callback)	Asynchronously emit a MetadataChangeProposalWrapper event.
java.util.concurrent.Future<MetadataWriteResponse>	emit(java.util.List<UpsertAspectRequest> request, Callback callback)	Asynchronously emit a UpsertAspectRequest.
boolean	testConnection()	Test that the emitter can establish a valid connection to the DataHub platform

Methods inherited from interface java.io.Closeable

close

Method Detail

emit

java.util.concurrent.Future<MetadataWriteResponse> emit(@Nonnull
                                                        MetadataChangeProposalWrapper mcpw,
                                                        Callback callback)
                                                 throws java.io.IOException

Asynchronously emit a MetadataChangeProposalWrapper event.

Parameters:

mcpw -

callback - if not null, is called from the IO thread. Should be a quick operation.

Returns:

a Future for callers to inspect the result of the operation or block until one is available

Throws:

java.io.IOException

emit

default java.util.concurrent.Future<MetadataWriteResponse> emit(@Nonnull
                                                                MetadataChangeProposalWrapper mcpw)
                                                         throws java.io.IOException

Asynchronously emit a MetadataChangeProposalWrapper event.

Parameters:

mcpw -

Returns:

a Future for callers to inspect the result of the operation or block until one is available

Throws:

java.io.IOException

emit

java.util.concurrent.Future<MetadataWriteResponse> emit(@Nonnull
                                                        com.linkedin.mxe.MetadataChangeProposal mcp,
                                                        Callback callback)
                                                 throws java.io.IOException

Asynchronously emit a MetadataChangeProposal event. Prefer using the sibling method that accepts a MetadataChangeProposalWrapper event as those are friendlier to construct.

Parameters:

mcp -

callback - if not null, is called from the IO thread. Should be a quick operation.

Returns:

a Future for callers to inspect the result of the operation or block until one is available

Throws:

java.io.IOException

emit

default java.util.concurrent.Future<MetadataWriteResponse> emit(@Nonnull
                                                                com.linkedin.mxe.MetadataChangeProposal mcp)
                                                         throws java.io.IOException

Asynchronously emit a MetadataChangeProposal event. Prefer using the sibling method that accepts a MetadataChangeProposalWrapper event as those are friendlier to construct.

Parameters:

mcp -

Returns:

a Future for callers to inspect the result of the operation or block until one is available

Throws:

java.io.IOException

testConnection

boolean testConnection()
                throws java.io.IOException,
                       java.util.concurrent.ExecutionException,
                       java.lang.InterruptedException

Test that the emitter can establish a valid connection to the DataHub platform

Returns:

true if a valid connection can be established, false or throws one of the exceptions otherwise

Throws:

java.io.IOException

java.util.concurrent.ExecutionException

java.lang.InterruptedException

emit

java.util.concurrent.Future<MetadataWriteResponse> emit(java.util.List<UpsertAspectRequest> request,
                                                        Callback callback)
                                                 throws java.io.IOException

Asynchronously emit a UpsertAspectRequest.

Parameters:

request - request with with metadata aspect to upsert into DataHub

Returns:

a Future for callers to inspect the result of the operation or block until one is available

Throws:

java.io.IOException