Class AtomicActionRenderer

A middleware to make action render events to satisfy transactions' atomicity.

Decorates an IActionRenderer instance and filters out render events made by unsuccessful transactions (i.e., transactions with one or more exception-throwing actions).

Inheritance

Object

AtomicActionRenderer

Implements

IActionRenderer

IRenderer

Inherited Members

Object.Equals(Object)

Object.Equals(Object, Object)

Object.GetHashCode()

Object.GetType()

Object.MemberwiseClone()

Object.ReferenceEquals(Object, Object)

Object.ToString()

Namespace: Libplanet.Blockchain.Renderers

Assembly: Libplanet.dll

Syntax

public sealed class AtomicActionRenderer : IActionRenderer, IRenderer

Remarks

The wrapped ActionRenderer will not receive any RenderActionError(IValue, IActionContext, Exception) events except for block actions, which do not belong to any transactions.

Constructors

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AtomicActionRenderer(IActionRenderer)

Creates a new AtomicActionRenderer instance decorating the given actionRenderer.

Declaration

public AtomicActionRenderer(IActionRenderer actionRenderer)

Parameters

Type	Name	Description
IActionRenderer	actionRenderer	The inner action renderer which has the actual implementations and expects to receive no RenderActionError(IValue, IActionContext, Exception) events.

Remarks

The wrapped ActionRenderer will not receive any RenderActionError(IValue, IActionContext, Exception) events except for block actions, which do not belong to any transactions.

Properties

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ActionRenderer

The inner action renderer which has the actual implementations and expects to receive no RenderActionError(IValue, IActionContext, Exception) events.

Declaration

public IActionRenderer ActionRenderer { get; }

Property Value

Type	Description
IActionRenderer

Remarks

The wrapped ActionRenderer will not receive any RenderActionError(IValue, IActionContext, Exception) events except for block actions, which do not belong to any transactions.

Methods

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RenderAction(IValue, IActionContext, IAccountStateDelta)

Does things that should be done right after an action is executed and applied to the blockchain.

Declaration

public void RenderAction(IValue action, IActionContext context, IAccountStateDelta nextStates)

Parameters

Type	Name	Description
Bencodex.Types.IValue	action	An executed action.
IActionContext	context	The equivalent context object to an object passed to the `action`'s Execute(IActionContext) method. That means PreviousStates are the states right before this action executed. For the states after this action executed, use the `nextStates` argument instead.
IAccountStateDelta	nextStates	The states right after this action executed, which means it is equivalent to the states `action`'s Execute(IActionContext) method returned.

Remarks

It is guaranteed to be called only once for an action, and only after applied to the blockchain, unless an exception is thrown during executing the action (in that case RenderActionError(IValue, IActionContext, Exception) is called instead) or once the action has been unrendered.

Also note that this method is invoked after RenderBlock(Block, Block) method is called (where its second parameter newTip contains a transaction the action belongs to).

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RenderActionError(IValue, IActionContext, Exception)

Does the similar things to RenderAction(IValue, IActionContext, IAccountStateDelta), except that this method is invoked when action has terminated with an exception.

Declaration

public void RenderActionError(IValue action, IActionContext context, Exception exception)

Parameters

Type	Name	Description
Bencodex.Types.IValue	action	An action which threw an exception during execution.
IActionContext	context	The equivalent context object to an object passed to the `action`'s Execute(IActionContext) method. That means PreviousStates are the states right before this action executed.
Exception	exception	The exception thrown during executing the `action`.

Remarks

Also note that this method is invoked after RenderBlock(Block, Block) method is called (where its second parameter newTip contains a transaction the action belongs to).

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RenderBlock(Block, Block)

Does things that should be done right after a new Block is appended to a BlockChain<T> (so that its Tip has changed).

Declaration

public void RenderBlock(Block oldTip, Block newTip)

Parameters

Type	Name	Description
Block	oldTip	The previous Tip.
Block	newTip	The current Tip.

Remarks

It is guaranteed to be called only once for a block, and only after applied to the blockchain, unless it has been stale due to reorg.

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RenderBlockEnd(Block, Block)

Does things that should be done right all actions in a new Block are rendered.

Declaration

public void RenderBlockEnd(Block oldTip, Block newTip)

Parameters

Type	Name	Description
Block	oldTip	The previous Tip.
Block	newTip	The current Tip.

Remarks

It is guaranteed to be called only once for a block.

Implements

IActionRenderer

IRenderer