Package com.vaadin.flow.server.communication.rpc

Class AbstractRpcInvocationHandler

java.lang.Object

com.vaadin.flow.server.communication.rpc.AbstractRpcInvocationHandler

All Implemented Interfaces:

RpcInvocationHandler, Serializable

Direct Known Subclasses:

AttachExistingElementRpcHandler, AttachTemplateChildRpcHandler, EventRpcHandler, MapSyncRpcHandler, PublishedServerEventHandlerRpcHandler, ReturnChannelHandler

public abstract class AbstractRpcInvocationHandler
extends Object
implements RpcInvocationHandler

Abstract invocation handler implementation with common methods.

For internal use only. May be renamed or removed in a future release.

Since:

1.0

Author:

Vaadin Ltd

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
AbstractRpcInvocationHandler()

Method Summary

Modifier and Type	Method	Description
protected boolean	allowInert(UI ui, tools.jackson.databind.JsonNode invocationJson)	Specifies whether inert status should be ignored for an RPC invocation or not.
protected static String	describeTarget(StateNode node)	Describes the target of an RPC invocation so that an application developer can tell which part of the application it relates to.
protected static int	getNodeId(tools.jackson.databind.JsonNode invocationJson)
Optional<Runnable>	handle(UI ui, tools.jackson.databind.JsonNode invocationJson)	Handles RPC data invocationJson using ui as a context.
protected abstract Optional<Runnable>	handleNode(StateNode node, tools.jackson.databind.JsonNode invocationJson)	Handle the RPC data invocationJson using target node as a context.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.vaadin.flow.server.communication.rpc.RpcInvocationHandler

getRpcType

Constructor Details

AbstractRpcInvocationHandler

public AbstractRpcInvocationHandler()

Method Details

handle

public Optional<Runnable> handle(UI ui,
 tools.jackson.databind.JsonNode invocationJson)

Description copied from interface: RpcInvocationHandler

Handles RPC data invocationJson using ui as a context.

Specified by:

handle in interface RpcInvocationHandler

Parameters:

ui - the UI to handle against, not null

invocationJson - the RPC data to handle, not null

Returns:

an optional runnable

describeTarget

protected static String describeTarget(StateNode node)

Describes the target of an RPC invocation so that an application developer can tell which part of the application it relates to. In addition to the state node id, the description contains the element tag and, when available, the component class and the routing target that the component is used in.

Parameters:

node - the target node, may be null

Returns:

a description of the target, not null

allowInert

protected boolean allowInert(UI ui,
 tools.jackson.databind.JsonNode invocationJson)

Specifies whether inert status should be ignored for an RPC invocation or not. The default behaviour is to let the polling events be handled, while ignoring other requests.

Parameters:

ui - the UI instance that RPC invocation originated from.

invocationJson - the JsonObject containing invocation properties.

Returns:

a boolean indicating that the inert status should be ignored for the current invocation or not.

Since:

25.0

handleNode

protected abstract Optional<Runnable> handleNode(StateNode node,
 tools.jackson.databind.JsonNode invocationJson)

Handle the RPC data invocationJson using target node as a context.

Parameters:

node - node to handle invocation with, not null

invocationJson - the RPC data to handle, not null

Returns:

an optional runnable

Since:

25.0

getNodeId

protected static int getNodeId(tools.jackson.databind.JsonNode invocationJson)