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Ajax Framework RemoteCommand

RemoteCommand provides a simple way to execute backing bean methods with javascript.

Sometimes you need to add a dynamic callback for when the remote command completes. Each remote command, when called, returns a promise-like object you can use for that purposes. Try opening a dev console and run the function "runRemoteCommand". See below for the code.

Ajax Tag Documentation

AjaxBehavior is an extension to standard f:ajax.

Name	Type	Required	Default	Description
async	boolean	false	false	When set to true, ajax requests are not queued.
delay	String	false		If less than delay milliseconds elapses between calls to request() only the most recent one is sent and all other requests are discarded. If this option is not specified, or if the value of delay is the literal string 'none' without the quotes, no delay is used.
disabled	boolean	false	false	Disables ajax behavior.
event	String	false		A String identifying the type of event the Ajax action will apply to. If specified, it must be one of the events supported by the component the Ajax behavior is being applied to. For HTML components this would be the set of supported DOM events for the component, plus "action" for Faces ActionSource components and "valueChange" for Faces EditableValueHolder components. If not specified, the default event is determined for the component. The DOM event name is the actual DOM event name (for example: "click") as opposed to (for example: "onclick").
form	String	false	The enclosing form	Form to serialize for an ajax request.
global	boolean	false	true	Global ajax requests are listened by ajaxStatus component, setting global to false will not trigger ajaxStatus.
ignoreAutoUpdate	boolean	false	false	If true, components which autoUpdate="true" will not be updated for this request. If not specified, or the value is false, no such indication is made.
ignoreComponentNotFound	boolean	false	false	If true, unresolvable components (ComponentNotFoundException) referenced in the update/process attribute are ignored.
immediate	boolean	false	false	Boolean value that determines the phaseId, when true actions are processed at apply_request_values, when false at invoke_application phase.
listener	MethodExpression	false		Method to process in partial request.
oncomplete	String	false		Client-side javascript callback to execute when ajax request is completed.
onerror	String	false		Client-side javascript callback to execute when ajax request fails.
onstart	String	false		Client-side javascript callback to execute before ajax request begins.
onsuccess	String	false		Client-side javascript callback to execute when ajax request succeeds.
partialSubmit	boolean	false	false	Enables serialization of values belonging to the partially processed components only.
partialSubmitFilter	String	false		Selector to use when partial submit is on, default is ":input" to select all descendant inputs of a partially processed components.
process	String	false		Component(s) to process in partial request.
resetValues	boolean	false	false	If true, local values of input components to be updated within the ajax request would be reset.
skipChildren	boolean	false	true	Containers components like, datatable, panel, tabview skip their children if the request owner is them. For example, sort, page event of a datatable. As children are skipped, input values get lost, assume a case with a datatable and inputs components in a column. Sorting the column discards the changes and data is sorted according to original value. Setting skipChildren to false, enabled input values to update the value and sorting to be happened with user values.
timeout	int	false	0	Timeout in milliseconds for ajax request, whereas 0 means no timeout.
update	String	false		Component(s) to update with ajax.

Name	Library	Target
jquery/jquery.js	primefaces
jquery/jquery-plugins.js	primefaces
core.js	primefaces

Behavior Id org.primefaces.component.AjaxBehavior

Behavior Class org.primefaces.behavior.ajax.AjaxBehavior

Handler Class org.primefaces.behavior.ajax.AjaxBehaviorHandler

RESOURCES

Tag DocumentationNew DocumentationNew Documentation

ON THIS PAGE

Introduction Process PartialSubmit Selector Search Validation RemoteCommand Observer Poll Fragment Status Lifecycle Dropdown


<div class="card">
    <h:form>
        <p:remoteCommand name="rc" update="msgs" action="#{remoteCommandView.execute}"/>

        <p:remoteCommand name="rc2" update="msgs" action="#{remoteCommandView.execute}"
                         oncomplete="PF('msgsWidget').renderMessage({severity: 'info', summary: 'Data Received', detail: args.serverTime})"/>

        <h5>Basic</h5>
        <p>Execute a simple remote command by calling a javascript function.</p>
        <p:commandButton type="button" value="Send" icon="pi pi-refresh" onclick="rc()"/>

        <h5>Parameters</h5>
        <p>Passing parameters to the remote method as a javascript object or array of objects.</p>
        <p:commandButton type="button" value="Send Array" icon="pi pi-refresh" styleClass="mr-2"
                onclick="rc([{name: 'param1', value: 'foo'}, {name: 'param2', value: 'bar'}])"/>
        <p:commandButton type="button" value="Send Object" icon="pi pi-refresh"
                onclick="rc({param1: 'foo', param2: 'bar'})"/>

        <h5>Receive Values Back</h5>
        <p>Receiving values form the server as a serialized json object.</p>
        <p:commandButton type="button" value="Send" icon="pi pi-refresh" onclick="rc2()"/>

        <script>
            function runRemoteCommand(param1, param2) {
                var promise = rc([{name: 'param1', value: param1}, {name: 'param2', value: param2}]);
                promise.then(function (responseData) {
                    var serverTime = responseData.jqXHR.pfArgs.serverTime;
                    console.log("Request successful, returned server time is", serverTime);
                }).catch(function (error) {
                    console.error("Request failed", error);
                });
            }
        </script>

        <p:growl id="msgs" showDetail="true" skipDetailIfEqualsSummary="true" widgetVar="msgsWidget" />
    </h:form>
</div>


package org.primefaces.showcase.view.ajax;

import org.primefaces.PrimeFaces;

import jakarta.enterprise.context.RequestScoped;
import jakarta.faces.application.FacesMessage;
import jakarta.faces.context.FacesContext;
import jakarta.inject.Named;

@Named
@RequestScoped
public class RemoteCommandView {

    public void execute() {
        String param1 = FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get("param1");
        String param2 = FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get("param2");
        if (param1 != null || param2 != null) {
            FacesContext.getCurrentInstance().addMessage(null,
                    new FacesMessage(FacesMessage.SEVERITY_INFO, "Executed", "param1: " + param1 + ", param2: " + param2));
        }
        else {
            FacesContext.getCurrentInstance().addMessage(null,
                    new FacesMessage(FacesMessage.SEVERITY_INFO, "Executed", "Using RemoteCommand."));
        }

        PrimeFaces.current().ajax().addCallbackParam("serverTime", System.currentTimeMillis());
    }
}

Ajax Framework RemoteCommand

Ajax Tag Documentation

Basic

Parameters

Receive Values Back

Usage

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