ByteChannelSequentialBase

Sequential (non-concurrent) byte channel implementation

Constructors

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fun ByteChannelSequentialBase(initial: ChunkBuffer, autoFlush: Boolean, pool: ObjectPool<ChunkBuffer> = ChunkBuffer.Pool)

Functions

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abstract fun attachJob(job: Job)
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open suspend override fun await(atLeast: Int): Boolean

Suspend until atLeast bytes become available or end of stream encountered (possibly due to exceptional close)

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open suspend override fun awaitContent()

Suspend until the channel has bytes to read or gets closed. Throws exception if the channel was closed with an error.

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open suspend override fun awaitFreeSpace()

Invokes block when at least 1 byte is available for write.

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open override fun beginWriteSession(): WriterSuspendSession
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open override fun cancel(cause: Throwable?): Boolean

Close channel with optional cause cancellation. Unlike ByteWriteChannel.close that could close channel normally, cancel does always close with error so any operations on this channel will always fail and all suspensions will be resumed with exception.

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open override fun close(cause: Throwable?): Boolean

Closes this channel with an optional exceptional cause. It flushes all pending write bytes (via flush). This is an idempotent operation -- repeated invocations of this function have no effect and return false.

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open override fun discard(n: Int): Int

Discard at most n available bytes or 0 if no bytes available yet

open suspend override fun discard(max: Long): Long

Discard up to max bytes

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open override fun endReadSession()
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open override fun endWriteSession(written: Int)
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open override fun flush()

Flushes all pending write bytes making them available for read.

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suspend override fun peekTo(destination: Memory, destinationOffset: Long, offset: Long, min: Long, max: Long): Long

Try to copy at least min but up to max bytes to the specified destination buffer from this input skipping offset bytes. If there are not enough bytes available to provide min bytes after skipping offset bytes then it will trigger the underlying source reading first and after that will simply copy available bytes even if EOF encountered so min is not a requirement but a desired number of bytes. It is safe to specify max greater than the destination free space. min shouldn't be bigger than the destination free space. This function could trigger the underlying source suspending reading. It is allowed to specify too big offset so in this case this function will always return 0 after prefetching all underlying bytes but note that it may lead to significant memory consumption. This function usually copy more bytes than min (unless max = min) but it is not guaranteed. When 0 is returned with offset = 0 then it makes sense to check isClosedForRead.

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open suspend override fun readAvailable(dst: ChunkBuffer): Int

open suspend override fun readAvailable(dst: ByteArray, offset: Int, length: Int): Int

Reads all available bytes to dst buffer and returns immediately or suspends if no bytes available

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open suspend override fun readBoolean(): Boolean

Reads a boolean value (suspending if no bytes available yet) or fails if channel has been closed and not enough bytes.

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open suspend override fun readByte(): Byte

Reads a byte (suspending if no bytes available yet) or fails if channel has been closed and not enough bytes.

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open suspend override fun readDouble(): Double

Reads double number (suspending if not enough bytes available) or fails if channel has been closed and not enough bytes.

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open suspend override fun readFloat(): Float

Reads float number (suspending if not enough bytes available) or fails if channel has been closed and not enough bytes.

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open suspend override fun readFully(dst: ChunkBuffer, n: Int)

open suspend override fun readFully(dst: ByteArray, offset: Int, length: Int)

Reads all length bytes to dst buffer or fails if channel has been closed. Suspends if not enough bytes available.

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open suspend override fun readInt(): Int

Reads an int number (suspending if not enough bytes available) or fails if channel has been closed and not enough bytes.

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open suspend override fun readLong(): Long

Reads a long number (suspending if not enough bytes available) or fails if channel has been closed and not enough bytes.

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open suspend override fun readPacket(size: Int): ByteReadPacket

Reads the specified amount of bytes and makes a byte packet from them. Fails if channel has been closed and not enough bytes available.

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open suspend override fun readRemaining(limit: Long): ByteReadPacket

Reads up to limit bytes and makes a byte packet or until end of stream encountered.

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open override fun readSession(consumer: ReadSession.() -> Unit)

Starts non-suspendable read session. After channel preparation consumer lambda will be invoked immediately event if there are no bytes available for read yet.

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open suspend override fun readShort(): Short

Reads a short number (suspending if not enough bytes available) or fails if channel has been closed and not enough bytes.

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open suspend override fun readSuspendableSession(consumer: suspend SuspendableReadSession.() -> Unit)

Starts a suspendable read session. After channel preparation consumer lambda will be invoked immediately even if there are no bytes available for read yet. consumer lambda could suspend as much as needed.

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open suspend override fun readUTF8Line(limit: Int): String?

Reads a line of UTF-8 characters up to limit characters. Supports both CR-LF and LF line endings. Throws an exception if the specified limit has been exceeded.

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open suspend override fun <A : Appendable> readUTF8LineTo(out: A, limit: Int): Boolean

Reads a line of UTF-8 characters to the specified out buffer up to limit characters. Supports both CR-LF and LF line endings. No line ending characters will be appended to out buffer. Throws an exception if the specified limit has been exceeded.

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open override fun request(atLeast: Int): ChunkBuffer?

Request buffer range atLeast bytes length

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open override fun startReadSession(): SuspendableReadSession
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open suspend override fun writeAvailable(src: ChunkBuffer): Int

open suspend override fun writeAvailable(src: ByteArray, offset: Int, length: Int): Int

Writes as much as possible and only suspends if buffer is full

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open suspend override fun writeByte(b: Byte)

Writes byte and suspends until written. Crashes if channel get closed while writing.

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open suspend override fun writeDouble(d: Double)

Writes double number and suspends until written. Crashes if channel get closed while writing.

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open suspend override fun writeFloat(f: Float)

Writes float number and suspends until written. Crashes if channel get closed while writing.

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open suspend override fun writeFully(src: Buffer)
open suspend override fun writeFully(memory: Memory, startIndex: Int, endIndex: Int)

open suspend override fun writeFully(src: ByteArray, offset: Int, length: Int)

Writes all src bytes and suspends until all bytes written. Causes flush if buffer filled up or when autoFlush Crashes if channel get closed while writing.

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open suspend override fun writeInt(i: Int)

Writes int number and suspends until written. Crashes if channel get closed while writing.

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open suspend override fun writeLong(l: Long)

Writes long number and suspends until written. Crashes if channel get closed while writing.

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open suspend override fun writePacket(packet: ByteReadPacket)

Writes a packet fully or fails if channel get closed before the whole packet has been written

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open suspend override fun writeShort(s: Short)

Writes short number and suspends until written. Crashes if channel get closed while writing.

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open suspend override fun writeSuspendSession(visitor: suspend WriterSuspendSession.() -> Unit)

Properties

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open override val autoFlush: Boolean

Returns true if channel flushes automatically all pending bytes after every write function call. If false then flush only happens at manual flush invocation or when the buffer is full.

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open override val availableForRead: Int

Returns number of bytes that can be read without suspension. Read operations do no suspend and return immediately when this number is at least the number of bytes requested for read.

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open override val availableForWrite: Int

Returns number of bytes that can be written without suspension. Write operations do no suspend and return immediately when this number is at least the number of bytes requested for write.

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override var closedCause: Throwable?

A closure causes exception or null if closed successfully or not yet closed

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open override val isClosedForRead: Boolean

Returns true if the channel is closed and no remaining bytes are available for read. It implies that availableForRead is zero.

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open override val isClosedForWrite: Boolean

Returns true is channel has been closed and attempting to write to the channel will cause an exception.

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open override val totalBytesRead: Long

Number of bytes read from the channel. It is not guaranteed to be atomic so could be updated in the middle of long-running read operation.

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open override val totalBytesWritten: Long

Number of bytes written to the channel. It is not guaranteed to be atomic so could be updated in the middle of write operation.

Inheritors

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