Java tutorial
/* * Copyright 2014-2016 CyberVision, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.kaaproject.kaa.server.admin.client.mvp.activity; import java.util.ArrayList; import java.util.List; import org.kaaproject.avro.ui.gwt.client.widget.grid.event.RowActionEvent; import org.kaaproject.avro.ui.gwt.client.widget.grid.event.RowActionEventHandler; import org.kaaproject.kaa.common.dto.EndpointGroupDto; import org.kaaproject.kaa.server.admin.client.KaaAdmin; import org.kaaproject.kaa.server.admin.client.mvp.ClientFactory; import org.kaaproject.kaa.server.admin.client.mvp.data.EndpointProfileDataProvider; import org.kaaproject.kaa.server.admin.client.mvp.place.EndpointProfilePlace; import org.kaaproject.kaa.server.admin.client.mvp.place.EndpointProfilesPlace; import org.kaaproject.kaa.server.admin.client.mvp.view.BaseListView; import org.kaaproject.kaa.server.admin.client.mvp.view.EndpointProfilesView; import org.kaaproject.kaa.server.admin.client.util.Utils; import com.google.gwt.activity.shared.AbstractActivity; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.ClickHandler; import com.google.gwt.event.logical.shared.ValueChangeEvent; import com.google.gwt.event.logical.shared.ValueChangeHandler; import com.google.gwt.event.shared.EventBus; import com.google.gwt.event.shared.HandlerRegistration; import com.google.gwt.place.shared.Place; import com.google.gwt.user.client.rpc.AsyncCallback; import com.google.gwt.user.client.ui.AcceptsOneWidget; public class EndpointProfilesActivity extends AbstractActivity implements BaseListView.Presenter { protected final ClientFactory clientFactory; private EndpointProfilesView listView; private EndpointProfilesPlace place; private String applicationId; private boolean gridLoaded; private EndpointProfileDataProvider dataProvider; private EndpointGroupDto groupAll; private List<HandlerRegistration> registrations = new ArrayList<>(); public EndpointProfilesActivity(EndpointProfilesPlace place, ClientFactory clientFactory) { this.place = place; this.clientFactory = clientFactory; this.applicationId = place.getApplicationId(); this.gridLoaded = place.isGridLoaded(); } @Override public void start(AcceptsOneWidget containerWidget, EventBus eventBus) { gridLoaded = false; listView = clientFactory.getEndpointProfilesView(); dataProvider = new EndpointProfileDataProvider(listView.getListWidget(), listView, this.applicationId); listView.setPresenter(this); bind(); containerWidget.setWidget(listView.asWidget()); } private void bind() { listView.clearError(); registrations.add(listView.getResetButton().addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent clickEvent) { reset(); } })); registrations.add(listView.getRowActionsSource().addRowActionHandler(new RowActionEventHandler<String>() { @Override public void onRowAction(RowActionEvent<String> event) { String id = event.getClickedId(); if (event.getAction() == RowActionEvent.CLICK) { goTo(new EndpointProfilePlace(applicationId, id, gridLoaded)); } } })); registrations.add( listView.getEndpointGroupsInfo().addValueChangeHandler(new ValueChangeHandler<EndpointGroupDto>() { @Override public void onValueChange(ValueChangeEvent<EndpointGroupDto> valueChangeEvent) { findByEndpointGroup(); } })); registrations.add(listView.getFindEndpointButton().addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent clickEvent) { findByEndpointKeyHash(); } })); final Place previousPlace = place.getPreviousPlace(); if (previousPlace != null) { listView.setBackEnabled(true); registrations.add(listView.getBackButton().addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { goTo(previousPlace); } })); } registrations .add(listView.getEndpointGroupButton().addValueChangeHandler(new ValueChangeHandler<Boolean>() { @Override public void onValueChange(ValueChangeEvent<Boolean> event) { findByEndpointGroup(); } })); registrations .add(listView.getEndpointKeyHashButton().addValueChangeHandler(new ValueChangeHandler<Boolean>() { @Override public void onValueChange(ValueChangeEvent<Boolean> event) { findByEndpointKeyHash(); } })); reset(); } private void findByEndpointGroup() { listView.getEndpointGroupButton().setValue(true); listView.getEndpointKeyHashButton().setValue(false); dataProvider.setNewGroup(listView.getEndpointGroupsInfo().getValue().getId()); dataProvider.update(); } private void findByEndpointKeyHash() { listView.getEndpointGroupButton().setValue(false); listView.getEndpointKeyHashButton().setValue(true); listView.clearError(); String value = listView.getEndpointKeyHashTextBox().getValue(); dataProvider.setEndpointKeyHash(value); dataProvider.update(); } private void reset() { listView.getEndpointKeyHashTextBox().setValue(""); if (!gridLoaded) { listView.getEndpointGroupButton().setValue(true); listView.getEndpointKeyHashButton().setValue(false); getGroupsList(); } else { listView.getEndpointGroupsInfo().setValue(groupAll); listView.getEndpointGroupButton().setValue(true); listView.getEndpointKeyHashButton().setValue(false); findByEndpointGroup(); } } private void getGroupsList() { if (!gridLoaded) { KaaAdmin.getDataSource().loadEndpointGroups(applicationId, new AsyncCallback<List<EndpointGroupDto>>() { @Override public void onFailure(Throwable caught) { Utils.handleException(caught, listView); } @Override public void onSuccess(List<EndpointGroupDto> result) { populateListBoxAndGrid(result); } }); } } private void populateListBoxAndGrid(List<EndpointGroupDto> result) { for (EndpointGroupDto endGroup : result) { if (endGroup.getWeight() == 0) { groupAll = endGroup; listView.getEndpointGroupsInfo().setValue(groupAll, true); } } listView.getEndpointGroupsInfo().setAcceptableValues(result); gridLoaded = true; } @Override public void goTo(Place place) { clientFactory.getPlaceController().goTo(place); } @Override public void onStop() { for (HandlerRegistration registration : registrations) { registration.removeHandler(); } registrations.clear(); } }