Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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.cyclop.web.panels.queryeditor; import javax.inject.Inject; import org.apache.wicket.Component; import org.apache.wicket.ajax.AjaxRequestTarget; import org.apache.wicket.authroles.authorization.strategies.role.Roles; import org.apache.wicket.authroles.authorization.strategies.role.annotations.AuthorizeInstantiation; import org.apache.wicket.markup.head.IHeaderResponse; import org.apache.wicket.markup.html.basic.Label; import org.apache.wicket.markup.html.form.Form; import org.apache.wicket.markup.html.panel.Panel; import org.apache.wicket.model.IModel; import org.apache.wicket.model.Model; import org.apache.wicket.request.mapper.parameter.PageParameters; import org.apache.wicket.util.string.StringValue; import org.cyclop.model.ContextCqlCompletion; import org.cyclop.model.CqlQuery; import org.cyclop.model.CqlQueryResult; import org.cyclop.model.UserPreferences; import org.cyclop.service.cassandra.QueryService; import org.cyclop.service.exporter.CsvQueryResultExporter; import org.cyclop.service.um.UserManager; import org.cyclop.web.panels.queryeditor.buttons.ButtonsPanel; import org.cyclop.web.panels.queryeditor.completionhint.CompletionHintPanel; import org.cyclop.web.panels.queryeditor.cqlhelp.CqlHelpPanel; import org.cyclop.web.panels.queryeditor.editor.CompletionChangeListener; import org.cyclop.web.panels.queryeditor.editor.EditorPanel; import org.cyclop.web.panels.queryeditor.export.QueryResultExport; import org.cyclop.web.panels.queryeditor.result.QueryResultPanel; import org.cyclop.web.panels.queryeditor.result.SwitchableQueryResultPanel; import org.cyclop.web.panels.queryeditor.result.SwitchableQueryResultPanel.ViewType; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** @author Maciej Miklas */ @AuthorizeInstantiation(Roles.ADMIN) public class QueryEditorPanel extends Panel { private final static Logger LOG = LoggerFactory.getLogger(QueryEditorPanel.class); private CqlHelpPanel cqlHelpPanel; private CompletionHintPanel cqlCompletionHintPanel; private boolean queryRunning = false; private CqlQuery lastQuery; private QueryResultExport queryResultExport; @Inject private CsvQueryResultExporter exporter; @Inject private UserManager userManager; @Inject private QueryService queryService; private final IModel<CqlQueryResult> queryResultModel; private Label queryErrorLabel; private SwitchableQueryResultPanel queryResultPanel; private PageParameters params; public QueryEditorPanel(String id, PageParameters params) { super(id); queryResultModel = Model.of(CqlQueryResult.EMPTY); this.params = params; } @Override protected void onInitialize() { super.onInitialize(); setRenderBodyOnly(true); cqlHelpPanel = new CqlHelpPanel("cqlHelp"); add(cqlHelpPanel); UserPreferences preferences = userManager.readPreferences(); cqlCompletionHintPanel = new CompletionHintPanel("cqlInfoHint", "Completion Hint"); cqlCompletionHintPanel.setVisible(preferences.isShowCqlCompletionHint()); add(cqlCompletionHintPanel); queryResultPanel = new SwitchableQueryResultPanel("queryResultPanel", queryResultModel, ViewType.fromOrientation(preferences.getResultOrientation())); add(queryResultPanel); queryResultPanel.setOutputMarkupPlaceholderTag(true); EditorPanel queryEditorPanel = initQueryEditorPanel(params); Form<String> editorForm = initForm(queryEditorPanel); initButtons(queryEditorPanel, editorForm); queryResultExport = new QueryResultExport(this, exporter); queryErrorLabel = initQueryErrorLabel(); } private Form<String> initForm(EditorPanel queryEditorPanel) { Form<String> form = new Form<>("editorForm"); form.add(queryEditorPanel); add(form); return form; } @Override public void renderHead(IHeaderResponse response) { super.renderHead(response); QueryResultPanel.initTableResizeJs(response); } private Label initQueryErrorLabel() { Label queryErrorLabel = new Label("queryError", Model.of("")); add(queryErrorLabel); queryErrorLabel.setVisible(false); queryErrorLabel.setOutputMarkupPlaceholderTag(true); return queryErrorLabel; } private EditorPanel initQueryEditorPanel(PageParameters params) { StringValue editorContentVal = params.get("cql"); String editorContent = editorContentVal == null ? null : editorContentVal.toString(); EditorPanel queryEditorPanel = new EditorPanel("queryEditorPanel", editorContent); add(queryEditorPanel); queryEditorPanel.setOutputMarkupPlaceholderTag(true); queryEditorPanel.registerCompletionChangeListener(new CompletionChangeHelp()); queryEditorPanel.registerCompletionChangeListener(new CompletionChangeHint()); return queryEditorPanel; } private ButtonsPanel initButtons(final EditorPanel editorPanel, Form<String> editorForm) { ButtonsPanel buttonsPanel = new ButtonsPanel("buttons"); buttonsPanel.withResultOrientation((t, o) -> queryResultPanel.switchView(t, ViewType.fromOrientation(o))); buttonsPanel.withCompletion((t, p) -> { cqlCompletionHintPanel.setVisible(p); t.add(cqlCompletionHintPanel); }); buttonsPanel.withExportQueryResult(t -> queryResultExport.initiateDownload(t, lastQuery)); buttonsPanel.withExecQuery(t -> handleExecQuery(t, editorPanel), editorForm); buttonsPanel.withAddToFavourites(); add(buttonsPanel); return buttonsPanel; } private void handleExecQuery(AjaxRequestTarget target, EditorPanel editorPanel) { // this cannot happen, because java script disables execute // button - it's DOS prevention if (queryRunning) { LOG.warn("Query still running - cannot execute second one"); return; } CqlQuery query = editorPanel.getEditorContent(); if (query == null) { return; } queryRunning = true; try { CqlQueryResult queryResult = queryService.execute(query); lastQuery = query; queryResultModel.setObject(queryResult); queryResultPanel.modelChanged(); queryResultPanel.setVisible(true); queryErrorLabel.setVisible(false); } catch (Exception e) { queryErrorLabel.setVisible(true); queryResultPanel.setVisible(false); queryErrorLabel.setDefaultModelObject(e.getMessage()); } finally { queryRunning = false; } editorPanel.resetCompletion(); target.add(queryErrorLabel); target.add(queryResultPanel); QueryResultPanel.appendTableResizeJs(target); } private final class CompletionChangeHelp implements CompletionChangeListener { @Override public void onCompletionChange(ContextCqlCompletion currentCompletion) { cqlHelpPanel.changeCompletion(currentCompletion); } @Override public Component getReferencesForRefresh() { return cqlHelpPanel; } } private final class CompletionChangeHint implements CompletionChangeListener { @Override public void onCompletionChange(ContextCqlCompletion currentCompletion) { cqlCompletionHintPanel.changeCompletion(currentCompletion); } @Override public Component getReferencesForRefresh() { return cqlCompletionHintPanel; } } }