ServerMessagesPresenter.java
/*
** Module : ServerMessagesPresenter.java
** Abstract : ServerMessagesPresenter is a controller that implements business methods to work
** with server messages.
**
** Copyright (c) 2017, Golden Code Development Corporation.
**
** -#- -I- --Date-- ----------------Description----------------------
** 001 SBI 20170601 Created initial version.
*/
/*
** This program is free software: you can redistribute it and/or modify
** it under the terms of the GNU Affero General Public License as
** published by the Free Software Foundation, either version 3 of the
** License, or (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU Affero General Public License for more details.
**
** You may find a copy of the GNU Affero GPL version 3 at the following
** location: https://www.gnu.org/licenses/agpl-3.0.en.html
**
** Additional terms under GNU Affero GPL version 3 section 7:
**
** Under Section 7 of the GNU Affero GPL version 3, the following additional
** terms apply to the works covered under the License. These additional terms
** are non-permissive additional terms allowed under Section 7 of the GNU
** Affero GPL version 3 and may not be removed by you.
**
** 0. Attribution Requirement.
**
** You must preserve all legal notices or author attributions in the covered
** work or Appropriate Legal Notices displayed by works containing the covered
** work. You may not remove from the covered work any author or developer
** credit already included within the covered work.
**
** 1. No License To Use Trademarks.
**
** This license does not grant any license or rights to use the trademarks
** Golden Code, FWD, any Golden Code or FWD logo, or any other trademarks
** of Golden Code Development Corporation. You are not authorized to use the
** name Golden Code, FWD, or the names of any author or contributor, for
** publicity purposes without written authorization.
**
** 2. No Misrepresentation of Affiliation.
**
** You may not represent yourself as Golden Code Development Corporation or FWD.
**
** You may not represent yourself for publicity purposes as associated with
** Golden Code Development Corporation, FWD, or any author or contributor to
** the covered work, without written authorization.
**
** 3. No Misrepresentation of Source or Origin.
**
** You may not represent the covered work as solely your work. All modified
** versions of the covered work must be marked in a reasonable way to make it
** clear that the modified work is not originating from Golden Code Development
** Corporation or FWD. All modified versions must contain the notices of
** attribution required in this license.
*/
package com.goldencode.p2j.admin.client.application.home.help;
import java.util.logging.Level;
import com.goldencode.p2j.admin.client.NameTokens;
import com.goldencode.p2j.admin.client.application.Alarm;
import com.goldencode.p2j.admin.client.application.home.BasePresenter;
import com.goldencode.p2j.admin.client.application.home.HomePresenter;
import com.goldencode.p2j.admin.client.widget.dialog.ModalDialogs;
import com.goldencode.p2j.admin.shared.AdminServiceAsync;
import com.google.gwt.user.client.*;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.inject.Inject;
import com.google.web.bindery.event.shared.EventBus;
import com.gwtplatform.mvp.client.HasUiHandlers;
import com.gwtplatform.mvp.client.View;
import com.gwtplatform.mvp.client.annotations.NameToken;
import com.gwtplatform.mvp.client.annotations.ProxyStandard;
import com.gwtplatform.mvp.client.presenter.slots.NestedSlot;
import com.gwtplatform.mvp.client.proxy.PlaceManager;
import com.gwtplatform.mvp.client.proxy.ProxyPlace;
import com.gwtplatform.mvp.shared.proxy.PlaceRequest;
/**
* ServerMessagesPresenter is a controller that implements business methods to work with server
* messages.
*/
public class ServerMessagesPresenter
extends BasePresenter<ServerMessagesPresenter.MyView, ServerMessagesPresenter.MyProxy>
implements ServerMesagesUiHandlers
{
/** The attachment point for dependent modal dialogs on this view */
public static final NestedSlot MODAL_CONTENT = new NestedSlot();
/**
* This view interface that must be implemented by the concrete view according to GWTP
* framework. Defines the exposed business methods.
*/
public interface MyView
extends View, HasUiHandlers<ServerMesagesUiHandlers>
{
/**
* Sets the server messages list model.
*
* @param messages
* The array of messages
*/
void setMessages(String[] messages);
}
/**
* Defines the proxy place for GWTP framework. Binds /help/messages url to this presenter.
*/
@ProxyStandard
@NameToken(NameTokens.SERVER_MESSAGES)
public interface MyProxy
extends ProxyPlace<ServerMessagesPresenter>
{}
/** Administration server interface */
private final AdminServiceAsync adminService;
/** The common modal dialogs manager */
private final ModalDialogs modalDialogsManager;
/** The server alarms manager */
private final Alarm serverAlarmsManager;
/**
* Defines the Server Messages presenter.
*
* @param eventBus
* The event bus
* @param view
* The associated view
* @param proxy
* The proxy place
* @param placeManager
* The place manager
* @param adminService
* The administration service
* @param modalDialogsManager
* The common modal dialogs manager
* @param serverAlarmsManager
* The server alarms
*/
@Inject
public ServerMessagesPresenter(EventBus eventBus,
MyView view,
MyProxy proxy,
PlaceManager placeManager,
AdminServiceAsync adminService,
ModalDialogs modalDialogsManager,
Alarm serverAlarmsManager)
{
super(eventBus, view, proxy, HomePresenter.SLOT_CONTENT, placeManager);
this.adminService = adminService;
this.modalDialogsManager = modalDialogsManager;
this.serverAlarmsManager = serverAlarmsManager;
getView().setUiHandlers(this);
}
/**
* Loads the data before the associated view will be displayed.
*
* @param request
* The current request
*/
@Override
public void prepareFromRequest(PlaceRequest request)
{
super.prepareFromRequest(request);
String action = request.getParameter("action", "");
if ("clear".equals(action))
{
clearMessages();
}
else
{
showMessages();
}
}
/**
* Retrieves the server messages asynchronously and updates its view accordingly if this action
* is completed successfully.
*/
private void showMessages()
{
this.serverAlarmsManager.getAllMessages(messages -> {
if (messages != null)
{
getView().setMessages(messages.toArray(new String[messages.size()]));
}
}, false);
}
/**
* Requests to clear the server messages and updates its view accordingly if this action is
* completed.
*/
private void clearMessages()
{
this.adminService.clearMessages(new AsyncCallback<Void>()
{
@Override
public void onSuccess(Void result)
{
showMessages();
}
@Override
public void onFailure(Throwable caught)
{
logger.log(Level.SEVERE, "Failed to call clearMessages", caught);
showMessages();
}
});
}
/**
* Hides the Server Messages view and displays the invoker view.
*/
@Override
public void onBackAction()
{
History.back();
}
}