com.vaadin.client.communication

Class ServerRpcQueue

java.lang.Object

com.vaadin.client.communication.ServerRpcQueue

public class ServerRpcQueue
extends Object

Manages the queue of server invocations (RPC) which are waiting to be sent to the server.

Since:

7.6

Author:

Vaadin Ltd

Field Summary

Fields

Modifier and Type	Field and Description
protected ApplicationConnection	connection

Constructor Summary

Constructors

Constructor and Description
ServerRpcQueue()

Method Summary

Modifier and Type	Method and Description
void	add(MethodInvocation invocation, boolean lastOnly) Adds an explicit RPC method invocation to the send queue.
void	clear() Clears the queue
void	flush() Triggers a send of server RPC and legacy variable changes to the server.
static ServerRpcQueue	get(ApplicationConnection connection) Returns the server RPC queue for the given application
Collection<MethodInvocation>	getAll() Returns a collection of all queued method invocations
boolean	isEmpty() Checks if the queue is empty
boolean	isFlushPending() Checks if a flush operation is pending
static boolean	isJavascriptRpc(MethodInvocation invocation) Checks if the given method invocation originates from Javascript
static boolean	isLegacyVariableChange(MethodInvocation invocation) Checks if the given method invocation represents a Vaadin 6 variable change
void	removeMatching(MethodInvocation invocation) Removes any pending invocation of the given method from the queue
void	setConnection(ApplicationConnection connection) Sets the application connection this instance is connected to.
boolean	showLoadingIndicator() Checks if a loading indicator should be shown when the RPCs have been sent to the server and we are waiting for a response
int	size() Returns the current size of the queue
JsonArray	toJson() Returns the current invocations as JSON

Methods inherited from class java.lang.Object

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

Field Detail

connection

protected ApplicationConnection connection

Constructor Detail

ServerRpcQueue

public ServerRpcQueue()

Method Detail

setConnection

public void setConnection(ApplicationConnection connection)

Sets the application connection this instance is connected to. Called internally by the framework.

Parameters:

connection - the application connection this instance is connected to

removeMatching

public void removeMatching(MethodInvocation invocation)

Removes any pending invocation of the given method from the queue

Parameters:

invocation - The invocation to remove

add

public void add(MethodInvocation invocation,
                boolean lastOnly)

Adds an explicit RPC method invocation to the send queue.

Parameters:

invocation - RPC method invocation

delayed - false to trigger sending within a short time window (possibly combining subsequent calls to a single request), true to let the framework delay sending of RPC calls and variable changes until the next non-delayed change

lastOnly - true to remove all previously delayed invocations of the same method that were also enqueued with lastonly set to true. false to add invocation to the end of the queue without touching previously enqueued invocations.

getAll

public Collection<MethodInvocation> getAll()

Returns a collection of all queued method invocations

The returned collection must not be modified in any way

Returns:

a collection of all queued method invocations

clear

public void clear()

Clears the queue

size

public int size()

Returns the current size of the queue

Returns:

the number of invocations in the queue

get

public static ServerRpcQueue get(ApplicationConnection connection)

Returns the server RPC queue for the given application

Parameters:

connection - the application connection which owns the queue

Returns:

the server rpc queue for the given application

isEmpty

public boolean isEmpty()

Checks if the queue is empty

Returns:

true if the queue is empty, false otherwise

flush

public void flush()

Triggers a send of server RPC and legacy variable changes to the server.

isFlushPending

public boolean isFlushPending()

Checks if a flush operation is pending

Returns:

true if a flush is pending, false otherwise

showLoadingIndicator

public boolean showLoadingIndicator()

Checks if a loading indicator should be shown when the RPCs have been sent to the server and we are waiting for a response

Returns:

true if a loading indicator should be shown, false otherwise

toJson

public JsonArray toJson()

Returns the current invocations as JSON

Returns:

the current invocations in a JSON format ready to be sent to the server

isJavascriptRpc

public static boolean isJavascriptRpc(MethodInvocation invocation)

Checks if the given method invocation originates from Javascript

Parameters:

invocation - the invocation to check

Returns:

true if the method invocation originates from javascript, false otherwise

isLegacyVariableChange

public static boolean isLegacyVariableChange(MethodInvocation invocation)

Checks if the given method invocation represents a Vaadin 6 variable change

Parameters:

invocation - the invocation to check

Returns:

true if the method invocation is a legacy variable change, false otherwise