io.axoniq.axonserver.connector.impl.buffer

Class RoundRobinMultiReadonlyBuffer<T>

java.lang.Object

io.axoniq.axonserver.connector.impl.buffer.RoundRobinMultiReadonlyBuffer<T>

Type Parameters:

T - the type of messages this buffer contain

All Implemented Interfaces:

CloseableReadonlyBuffer<T>, DisposableReadonlyBuffer<T>

public class RoundRobinMultiReadonlyBuffer<T>
extends Object
implements DisposableReadonlyBuffer<T>

An implementation of the DisposableReadonlyBuffer that operates across multiple DisposableReadonlyBuffer instances. Operations are delegated to these instances in a round-robin fashion.

Since:

4.6.0

Author:

Milan Savic, Stefan Dragisic, Allard Buijze

Constructor Summary

Constructors

Constructor and Description
RoundRobinMultiReadonlyBuffer(List<? extends DisposableReadonlyBuffer<T>> buffers) Instantiates this buffer with a list of delegates.

Method Summary

Modifier and Type	Method and Description
int	capacity() Sums up capacities of all buffers.
boolean	closed() Checks whether all buffers are closed.
void	dispose() Calls a DisposableReadonlyBuffer.dispose() on each and every buffer.
Optional<ErrorMessage>	error() Retrieves an error from the first buffer if all buffers errored out.
boolean	isEmpty() Checks whether all buffers are empty.
void	onAvailable(Runnable onAvailable) Registers onAvailable handler to all buffers
Optional<T>	poll() Polls the element from one of the buffers in a round-robin fashion.

Methods inherited from class java.lang.Object

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

Constructor Detail

RoundRobinMultiReadonlyBuffer

public RoundRobinMultiReadonlyBuffer(List<? extends DisposableReadonlyBuffer<T>> buffers)

Instantiates this buffer with a list of delegates.

Parameters:

buffers - a list of delegates

Method Detail

poll

public Optional<T> poll()

Polls the element from one of the buffers in a round-robin fashion.

Specified by:

poll in interface CloseableReadonlyBuffer<T>

Returns:

an Optional with polled message

See Also:

CloseableReadonlyBuffer.poll()

closed

public boolean closed()

Checks whether all buffers are closed.

Specified by:

closed in interface CloseableReadonlyBuffer<T>

Returns:

true if all buffers are closed, false otherwise

See Also:

CloseableReadonlyBuffer.closed()

error

public Optional<ErrorMessage> error()

Retrieves an error from the first buffer if all buffers errored out.

Specified by:

error in interface CloseableReadonlyBuffer<T>

Returns:

the error from the first buffer if all buffers errored out

See Also:

CloseableReadonlyBuffer.error()

isEmpty

public boolean isEmpty()

Checks whether all buffers are empty.

Specified by:

isEmpty in interface CloseableReadonlyBuffer<T>

Returns:

true if all buffers are empty, false otherwise

See Also:

CloseableReadonlyBuffer.isEmpty()

capacity

public int capacity()

Sums up capacities of all buffers.

Specified by:

capacity in interface CloseableReadonlyBuffer<T>

Returns:

the sum of capacities of all buffers

See Also:

CloseableReadonlyBuffer.capacity()

onAvailable

public void onAvailable(Runnable onAvailable)

Registers onAvailable handler to all buffers

Specified by:

onAvailable in interface CloseableReadonlyBuffer<T>

Parameters:

onAvailable - to be invoked when there are changes in buffers

See Also:

CloseableReadonlyBuffer.onAvailable(Runnable)

dispose

public void dispose()

Calls a DisposableReadonlyBuffer.dispose() on each and every buffer.

Specified by:

dispose in interface DisposableReadonlyBuffer<T>

See Also:

DisposableReadonlyBuffer.dispose()