FileIO
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package javadsl
Creates a synchronous Source from a files contents.
Creates a synchronous Source from a files contents.
Emitted elements are chunkSize sized ByteString elements,
except the last element, which will be up to chunkSize in size.
You can configure the default dispatcher for this Source by changing the akka.stream.blocking-io-dispatcher or
set it for a given Source by using ActorAttributes.
It materializes a java.util.concurrent.CompletionStage of IOResult containing the number of bytes read from the source file upon completion, and a possible exception if IO operation was not completed successfully.
the file path to read from
the size of each read operation
startPosition the start position to read from, defaults to 0
Creates a synchronous Source from a files contents.
Creates a synchronous Source from a files contents.
Emitted elements are chunkSize sized ByteString elements,
except the last element, which will be up to chunkSize in size.
You can configure the default dispatcher for this Source by changing the akka.stream.blocking-io-dispatcher or
set it for a given Source by using ActorAttributes.
It materializes a java.util.concurrent.CompletionStage of IOResult containing the number of bytes read from the source file upon completion, and a possible exception if IO operation was not completed successfully.
the file path to read from
the size of each read operation
Creates a Source from a files contents.
Creates a Source from a files contents. Emitted elements are ByteString elements, chunked by default by 8192 bytes, except the last element, which will be up to 8192 in size.
You can configure the default dispatcher for this Source by changing the akka.stream.blocking-io-dispatcher or
set it for a given Source by using ActorAttributes.
It materializes a java.util.concurrent.CompletionStage of IOResult containing the number of bytes read from the source file upon completion, and a possible exception if IO operation was not completed successfully.
the file path to read from
Creates a Sink that writes incoming ByteString elements to the given file path.
Creates a Sink that writes incoming ByteString elements to the given file path.
Materializes a java.util.concurrent.CompletionStage of IOResult that will be completed with the size of the file (in bytes) at the streams completion, and a possible exception if IO operation was not completed successfully.
You can configure the default dispatcher for this Source by changing the akka.stream.blocking-io-dispatcher or
set it for a given Source by using ActorAttributes.
Accepts as arguments a set of java.nio.file.StandardOpenOption, which will determine the underlying behavior when writing the file. If java.nio.file.StandardOpenOption.SYNC is provided, every update to the file's content be written synchronously to the underlying storage device. Otherwise (the default), the write will be written to the storage device asynchronously. by the OS, and may not be stored durably on the storage device at the time the stream completes.
The file path to write to
File open options, see java.nio.file.StandardOpenOption
startPosition the start position to read from, defaults to 0
Creates a Sink that writes incoming ByteString elements to the given file path.
Creates a Sink that writes incoming ByteString elements to the given file path.
Materializes a java.util.concurrent.CompletionStage of IOResult that will be completed with the size of the file (in bytes) at the streams completion, and a possible exception if IO operation was not completed successfully.
You can configure the default dispatcher for this Source by changing the akka.stream.blocking-io-dispatcher or
set it for a given Source by using ActorAttributes.
Accepts as arguments a set of java.nio.file.StandardOpenOption, which will determine the underlying behavior when writing the file. If java.nio.file.StandardOpenOption.SYNC is provided, every update to the file's content be written synchronously to the underlying storage device. Otherwise (the default), the write will be written to the storage device asynchronously by the OS, and may not be stored durably on the storage device at the time the stream completes.
The file path to write to
File open options, see java.nio.file.StandardOpenOption
Creates a Sink that writes incoming ByteString elements to the given file path.
Creates a Sink that writes incoming ByteString elements to the given file path. Overwrites existing files by truncating their contents, if you want to append to an existing file util.Set[OpenOption]) with java.nio.file.StandardOpenOption.APPEND.
Materializes a java.util.concurrent.CompletionStage of IOResult that will be completed with the size of the file (in bytes) at the streams completion, and a possible exception if IO operation was not completed successfully.
You can configure the default dispatcher for this Source by changing the akka.stream.blocking-io-dispatcher or
set it for a given Source by using ActorAttributes.
Accepts as arguments a set of java.nio.file.StandardOpenOption, which will determine the underlying behavior when writing the file. If java.nio.file.StandardOpenOption.SYNC is provided, every update to the file's content be written synchronously to the underlying storage device. Otherwise (the default), the write will be written to the storage device asynchronously by the OS, and may not be stored durably on the storage device at the time the stream completes.
The file path to write to
Creates a synchronous Source from a files contents.
Creates a synchronous Source from a files contents.
Emitted elements are chunkSize sized ByteString elements,
except the last element, which will be up to chunkSize in size.
You can configure the default dispatcher for this Source by changing the akka.stream.blocking-io-dispatcher or
set it for a given Source by using ActorAttributes.
It materializes a java.util.concurrent.CompletionStage of IOResult containing the number of bytes read from the source file upon completion, and a possible exception if IO operation was not completed successfully.
the file to read from
the size of each read operation
(Since version 2.4.5) Use fromPath instead.
Creates a Source from a files contents.
Creates a Source from a files contents. Emitted elements are ByteString elements, chunked by default by 8192 bytes, except the last element, which will be up to 8192 in size.
You can configure the default dispatcher for this Source by changing the akka.stream.blocking-io-dispatcher or
set it for a given Source by using ActorAttributes.
It materializes a java.util.concurrent.CompletionStage of IOResult containing the number of bytes read from the source file upon completion, and a possible exception if IO operation was not completed successfully.
the file to read from
(Since version 2.4.5) Use fromPath instead.
Creates a Sink that writes incoming ByteString elements to the given file.
Creates a Sink that writes incoming ByteString elements to the given file.
Materializes a java.util.concurrent.CompletionStage of IOResult that will be completed with the size of the file (in bytes) at the streams completion, and a possible exception if IO operation was not completed successfully.
You can configure the default dispatcher for this Source by changing the akka.stream.blocking-io-dispatcher or
set it for a given Source by using ActorAttributes.
The file to write to
File open options, see java.nio.file.StandardOpenOption
(Since version 2.4.5) Use toPath instead.
Creates a Sink that writes incoming ByteString elements to the given file.
Creates a Sink that writes incoming ByteString elements to the given file. Overwrites existing files by truncating their contents, if you want to append to an existing file use util.Set[OpenOption]) with java.nio.file.StandardOpenOption.APPEND.
Materializes a java.util.concurrent.CompletionStage of IOResult that will be completed with the size of the file (in bytes) at the streams completion, and a possible exception if IO operation was not completed successfully.
You can configure the default dispatcher for this Source by changing the akka.stream.blocking-io-dispatcher or
set it for a given Source by using ActorAttributes.
The file to write to
(Since version 2.4.5) Use toPath instead.
Java API: Factories to create sinks and sources from files