Class JournalingBlobWriteSessionConfig (2.39.0)

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Beta

This library is covered by the Pre-GA Offerings Terms of the Terms of Service. Pre-GA libraries might have limited support, and changes to pre-GA libraries might not be compatible with other pre-GA versions. For more information, see the launch stage descriptions.

public final class JournalingBlobWriteSessionConfig extends BlobWriteSessionConfig implements BlobWriteSessionConfig.GrpcCompatible

There are scenarios in which disk space is more plentiful than memory space. This new BlobWriteSessionConfig allows augmenting an instance of storage to produce BlobWriteSessions which will buffer to disk rather than holding things in memory.

If we have disk available we can checkpoint the contents of an object to disk before transmitting to GCS. The checkpointed data on disk allows arbitrary rewind in the case of failure but allows the upload to happen as soon as the checkpoint ack is complete.

Due to the details of how Resumable Upload Sessions are implemented in the GCS gRPC API this is possible. However, this approach will not work with the HTTP transports Resumable Upload Session spec. See Also: Storage#blobWriteSession(BlobInfo, BlobWriteOption...), GrpcStorageOptions.Builder#setBlobWriteSessionConfig(BlobWriteSessionConfig)

Inheritance

Object > BlobWriteSessionConfig > JournalingBlobWriteSessionConfig

Implements

com.google.cloud.storage.BlobWriteSessionConfig.GrpcCompatible

Inherited Members

BlobWriteSessionConfig.equals(Object)

BlobWriteSessionConfig.hashCode()

Object.clone()

Object.finalize()

Object.getClass()

Object.notify()

Object.notifyAll()

Object.toString()

Object.wait()

Object.wait(long)

Object.wait(long,int)

Methods

equals(Object o)

public boolean equals(Object o)

Parameter
Name	Description
o	Object

Returns
Type	Description
boolean

Overrides

BlobWriteSessionConfig.equals(Object obj)

hashCode()

public int hashCode()

Returns
Type	Description
int

Overrides

BlobWriteSessionConfig.hashCode()