Package com.google.cloud.hadoop.gcsio.testing

Class InMemoryObjectReadChannel

java.lang.Object

com.google.cloud.hadoop.gcsio.GoogleCloudStorageReadChannel

com.google.cloud.hadoop.gcsio.testing.InMemoryObjectReadChannel

All Implemented Interfaces:

Closeable, AutoCloseable, ByteChannel, Channel, ReadableByteChannel, SeekableByteChannel, WritableByteChannel

public class InMemoryObjectReadChannel
extends GoogleCloudStorageReadChannel

A SeekableByteChannel based on GoogleCloudStorageReadChannel that supports reading from in-memory byte stream.

Field Summary

Fields inherited from class com.google.cloud.hadoop.gcsio.GoogleCloudStorageReadChannel

contentChannelPosition, currentPosition, metadataInitialized

Constructor Summary

Constructors

Constructor	Description
InMemoryObjectReadChannel(String bucketName, String objectName, byte[] content, GoogleCloudStorageReadOptions readOptions)	Creates a new instance of InMemoryObjectReadChannel with readOptions plumbed into the base class.

Method Summary

Modifier and Type	Method	Description
protected GoogleCloudStorageItemInfo	getInitialMetadata()	Returns GoogleCloudStorageItemInfo used to initialize metadata in constructor or null if GoogleCloudStorageReadOptions.isFastFailOnNotFoundEnabled() is set to false.
protected InputStream	openStream(long bytesToRead)	Opens the underlying byte array stream, sets its position to currentPosition and sets size to size of the byte array.

Methods inherited from class com.google.cloud.hadoop.gcsio.GoogleCloudStorageReadChannel

close, closeContentChannel, createDataRequest, createMetadataRequest, initMetadata, initMetadata, isOpen, position, position, read, setMaxRetries, setSize, size, truncate, validatePosition, write

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

InMemoryObjectReadChannel

public InMemoryObjectReadChannel(String bucketName,
                                 String objectName,
                                 byte[] content,
                                 GoogleCloudStorageReadOptions readOptions)
                          throws IOException

Creates a new instance of InMemoryObjectReadChannel with readOptions plumbed into the base class.

Throws:

IOException

Method Detail

getInitialMetadata

@Nullable
protected GoogleCloudStorageItemInfo getInitialMetadata()
                                                 throws IOException

Description copied from class: GoogleCloudStorageReadChannel

Returns GoogleCloudStorageItemInfo used to initialize metadata in constructor or null if GoogleCloudStorageReadOptions.isFastFailOnNotFoundEnabled() is set to false.

Overrides:

getInitialMetadata in class GoogleCloudStorageReadChannel

Throws:

IOException

openStream

protected InputStream openStream(long bytesToRead)
                          throws IOException

Opens the underlying byte array stream, sets its position to currentPosition and sets size to size of the byte array.

Overrides:

openStream in class GoogleCloudStorageReadChannel

Parameters:

bytesToRead - ignored.

Throws:

IOException - on IO error