Java tutorial
/* * Copyright 2017 Marcus Portmann * * 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 guru.mmp.application.web.template.pages; //~--- non-JDK imports -------------------------------------------------------- import guru.mmp.application.configuration.ConfigurationValue; import guru.mmp.application.configuration.IConfigurationService; import guru.mmp.application.web.WebApplicationException; import guru.mmp.application.web.pages.WebPageSecurity; import guru.mmp.application.web.template.TemplateSecurity; import guru.mmp.application.web.template.components.Dialog; import guru.mmp.application.web.template.components.PagingNavigator; import guru.mmp.application.web.template.data.FilteredConfigurationValueDataProvider; import org.apache.wicket.ajax.AjaxRequestTarget; import org.apache.wicket.ajax.markup.html.AjaxLink; import org.apache.wicket.markup.html.WebMarkupContainer; import org.apache.wicket.markup.html.basic.Label; import org.apache.wicket.markup.html.form.Button; import org.apache.wicket.markup.html.form.Form; import org.apache.wicket.markup.html.form.TextField; import org.apache.wicket.markup.html.link.Link; import org.apache.wicket.markup.repeater.Item; import org.apache.wicket.markup.repeater.ReuseIfModelsEqualStrategy; import org.apache.wicket.markup.repeater.data.DataView; import org.apache.wicket.model.Model; import org.apache.wicket.model.PropertyModel; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import javax.inject.Inject; //~--- JDK imports ------------------------------------------------------------ /** * The <code>ConfigurationAdministrationPage</code> class implements the * "Configuration Administration" page for the Web Application Template. * * @author Marcus Portmann */ @WebPageSecurity(TemplateSecurity.FUNCTION_CODE_CONFIGURATION_ADMINISTRATION) public class ConfigurationAdministrationPage extends TemplateWebPage { /* Logger */ private static final Logger logger = LoggerFactory.getLogger(ConfigurationAdministrationPage.class); private static final long serialVersionUID = 1000000; /* Configuration Service */ @Inject private IConfigurationService configurationService; /** * Constructs a new <code>ConfigurationAdministrationPage</code>. */ public ConfigurationAdministrationPage() { super("Configuration"); try { /* * The table container, which allows the table and its associated navigator to be updated * using AJAX. */ WebMarkupContainer tableContainer = new WebMarkupContainer("tableContainer"); tableContainer.setOutputMarkupId(true); add(tableContainer); // The dialog used to confirm the removal of a configuration value RemoveDialog removeDialog = new RemoveDialog(tableContainer); add(removeDialog); // The "addLink" used to add a new configuration value Link<Void> addLink = new Link<Void>("addLink") { private static final long serialVersionUID = 1000000; @Override public void onClick() { setResponsePage(new AddConfigurationValuePage(getPageReference())); } }; tableContainer.add(addLink); FilteredConfigurationValueDataProvider dataProvider = new FilteredConfigurationValueDataProvider(); // The "filterForm" form Form<Void> filterForm = new Form<>("filterForm"); filterForm.setMarkupId("filterForm"); filterForm.setOutputMarkupId(true); // The "filter" field TextField<String> filterField = new TextField<>("filter", new PropertyModel<>(dataProvider, "filter")); filterForm.add(filterField); // The "filterButton" button Button filterButton = new Button("filterButton") { private static final long serialVersionUID = 1000000; @Override public void onSubmit() { } }; filterButton.setDefaultFormProcessing(true); filterForm.add(filterButton); // The "resetButton" button Button resetButton = new Button("resetButton") { private static final long serialVersionUID = 1000000; @Override public void onSubmit() { dataProvider.setFilter(""); } }; filterForm.add(resetButton); tableContainer.add(filterForm); // The configuration value data view DataView<ConfigurationValue> dataView = new DataView<ConfigurationValue>("configurationValue", dataProvider) { private static final long serialVersionUID = 1000000; @Override protected void populateItem(Item<ConfigurationValue> item) { item.add(new Label("key", new PropertyModel<String>(item.getModel(), "key"))); item.add(new Label("value", new PropertyModel<String>(item.getModel(), "value"))); // The "updateLink" link Link<Void> updateLink = new Link<Void>("updateLink") { private static final long serialVersionUID = 1000000; @Override public void onClick() { UpdateConfigurationValuePage page = new UpdateConfigurationValuePage(getPageReference(), item.getModel()); setResponsePage(page); } }; item.add(updateLink); // The "removeLink" link AjaxLink<Void> removeLink = new AjaxLink<Void>("removeLink") { private static final long serialVersionUID = 1000000; @Override public void onClick(AjaxRequestTarget target) { ConfigurationValue configuration = item.getModelObject(); if (configuration != null) { removeDialog.show(target, configuration); } else { target.add(tableContainer); } } }; item.add(removeLink); } }; dataView.setItemsPerPage(10); dataView.setItemReuseStrategy(ReuseIfModelsEqualStrategy.getInstance()); tableContainer.add(dataView); tableContainer.add(new PagingNavigator("navigator", dataView)); } catch (Throwable e) { throw new WebApplicationException("Failed to initialise the ConfigurationAdministrationPage", e); } } /** * The <code>RemoveDialog</code> class implements a dialog that allows the removal of a * configuration value to be confirmed. */ private class RemoveDialog extends Dialog { private static final long serialVersionUID = 1000000; private String key; private Label nameLabel; /** * Constructs a new <code>RemoveDialog</code>. * * @param tableContainer the table container, which allows the configuration value table and its * associated navigator to be updated using AJAX */ RemoveDialog(WebMarkupContainer tableContainer) { super("removeDialog"); nameLabel = new Label("name", Model.of("")); nameLabel.setOutputMarkupId(true); add(nameLabel); // The "removeLink" link AjaxLink<Void> removeLink = new AjaxLink<Void>("removeLink") { private static final long serialVersionUID = 1000000; @Override public void onClick(AjaxRequestTarget target) { try { configurationService.removeValue(key); target.add(tableContainer); ConfigurationAdministrationPage.this.info("Successfully removed the configuration value " + nameLabel.getDefaultModelObjectAsString()); } catch (Throwable e) { logger.error(String.format("Failed to remove the configuration value (%s): %s", key, e.getMessage()), e); ConfigurationAdministrationPage.this.error("Failed to remove the configuration value " + nameLabel.getDefaultModelObjectAsString()); } target.add(getAlerts()); hide(target); } }; add(removeLink); } /** * Show the dialog using Ajax. * * @param target the AJAX request target * @param configuration the configuration value being removed */ public void show(AjaxRequestTarget target, ConfigurationValue configuration) { key = configuration.getKey(); nameLabel.setDefaultModelObject(configuration.getKey()); target.add(nameLabel); super.show(target); } } }