StorageOutputStream Class

Package:

com.azure.storage.common

Maven Artifact:

com.azure:azure-storage-common:12.27.1

• java.lang.Object
• • java.io.OutputStream
  • • com.azure.storage.common.StorageOutputStream

public abstract class StorageOutputStream
extends OutputStream

StorageOutputStream allows for uploading data to an Azure Storage service using stream concepts.

Field Summary

Modifier and Type	Field and Description
protected volatile IOException	lastError Holds the last exception this stream encountered.

Constructor Summary

Modifier	Constructor	Description
protected	StorageOutputStream(int writeThreshold)	Creates a new instance of StorageOutputStream.

Method Summary

Modifier and Type	Method and Description
protected void	checkStreamState() Helper function to check if the stream is faulted, if it is it surfaces the exception.
synchronized void	close() Closes this output stream and releases any system resources associated with this stream.
protected abstract Mono<Void>	dispatchWrite(byte[] data, int writeLength, long offset) Dispatches a write operation to the Storage service.
void	flush() Flushes this output stream and forces any buffered output bytes to be written out.
void	write(byte[] data) Writes b.length bytes from the specified byte array to this output stream.
void	write(byte[] data, int offset, int length) Writes length bytes from the specified byte array starting at offset to this output stream.
void	write(int byteVal) Writes the specified byte to this output stream.
protected void	writeInternal(byte[] data, int offset, int length) Writes the data to the buffer and triggers writes to the service as needed.

Methods inherited from java.io.OutputStream

close flush nullOutputStream write write write

Methods inherited from java.lang.Object

clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Details

lastError

protected volatile IOException lastError

Holds the last exception this stream encountered.

Constructor Details

StorageOutputStream

protected StorageOutputStream(int writeThreshold)

Creates a new instance of StorageOutputStream.

Parameters:

writeThreshold - How many bytes the output will retain before it initiates a write to the Storage service.

Method Details

checkStreamState

protected void checkStreamState()

Helper function to check if the stream is faulted, if it is it surfaces the exception.

close

public synchronized void close()

Closes this output stream and releases any system resources associated with this stream. If any data remains in the buffer it is committed to the service.

Overrides:

StorageOutputStream.close()

Throws:

IOException

- If an I/O error occurs.

dispatchWrite

protected abstract Mono dispatchWrite(byte[] data, int writeLength, long offset)

Dispatches a write operation to the Storage service.

Parameters:

data - The data to send.

writeLength - Length of the data.

offset - The offset to write the data.

Returns:

A reactive response that indicates completion.

flush

public void flush()

Flushes this output stream and forces any buffered output bytes to be written out. If any data remains in the buffer it is committed to the service.

Overrides:

StorageOutputStream.flush()

write

public void write(byte[] data)

Writes b.length bytes from the specified byte array to this output stream.

Overrides:

StorageOutputStream.write(byte[] data)

Parameters:

data - A byte array which represents the data to write.

write

public void write(byte[] data, int offset, int length)

Writes length bytes from the specified byte array starting at offset to this output stream.

Overrides:

StorageOutputStream.write(byte[] data, int offset, int length)

Parameters:

data - A byte array which represents the data to write.

offset - An int which represents the start offset in the data.

length - An int which represents the number of bytes to write.

write

public void write(int byteVal)

Writes the specified byte to this output stream. The general contract for write is that one byte is written to the output stream. The byte to be written is the eight low-order bits of the argument b. The 24 high-order bits of b are ignored.

true is acceptable for you.

Overrides:

StorageOutputStream.write(int byteVal)

Parameters:

byteVal - An int which represents the byte value to write.

writeInternal

protected void writeInternal(byte[] data, int offset, int length)

Writes the data to the buffer and triggers writes to the service as needed.

Parameters:

data - A byte array which represents the data to write.

offset - An int which represents the start offset in the data.

length - An int which represents the number of bytes to write.