Java tutorial
/* * Copyright 2008 Google 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 com.google.gwt.gdata.sample.hellogdata.client; import com.google.gwt.accounts.client.AuthSubStatus; import com.google.gwt.accounts.client.User; import com.google.gwt.gdata.client.GData; import com.google.gwt.gdata.client.GDataSystemPackage; import com.google.gwt.gdata.client.analytics.AccountEntry; import com.google.gwt.gdata.client.analytics.AccountFeed; import com.google.gwt.gdata.client.analytics.AccountFeedCallback; import com.google.gwt.gdata.client.analytics.AnalyticsService; import com.google.gwt.gdata.client.analytics.DataEntry; import com.google.gwt.gdata.client.analytics.DataFeed; import com.google.gwt.gdata.client.analytics.DataFeedCallback; import com.google.gwt.gdata.client.analytics.DataQuery; import com.google.gwt.gdata.client.impl.CallErrorException; import com.google.gwt.user.client.ui.FlexTable; import com.google.gwt.user.client.ui.Label; /** * The following example demonstrates how to access the top ten pages * ordered by number of pageviews to a given site. */ public class AnalyticsTopPagesDemo extends GDataDemo { /** * This method is used by the main sample app to obtain * information on this sample and a sample instance. * * @return An instance of this demo. */ public static GDataDemoInfo init() { return new GDataDemoInfo() { @Override public GDataDemo createInstance() { return new AnalyticsTopPagesDemo(); } @Override public String getDescription() { return "<p>This sample demonstrates how to access the top ten " + "pages ordered by number of pageviews to your website.</p>"; } @Override public String getName() { return "Analytics - Querying pages by pageviews"; } }; } private AnalyticsService service; private FlexTable mainPanel; private final String scope = "https://www.google.com/analytics/feeds/"; /** * Setup the Analytics service and create the main content panel. * If the user is not logged on to Analytics display a message, * otherwise start the demo by retrieving the Analytics accounts. */ public AnalyticsTopPagesDemo() { mainPanel = new FlexTable(); initWidget(mainPanel); if (!GData.isLoaded(GDataSystemPackage.ANALYTICS)) { showStatus("Loading the GData Analytics package...", false); GData.loadGDataApi(GDATA_API_KEY, new Runnable() { public void run() { startDemo(); } }, GDataSystemPackage.ANALYTICS); } else { startDemo(); } } /** * Retrieve the Analytics accounts feed using the Analytics service and * the accounts feed uri. In GData all get, insert, update and delete methods * always receive a callback defining success and failure handlers. * Here, the failure handler displays an error message while the * success handler obtains the first Account entry and * calls queryData to retrieve the data feed for that account. * * @param accountsFeedUri The uri of the accounts feed */ private void getAccounts(String accountsFeedUri) { showStatus("Loading Analytics accounts feed...", false); service.getAccountFeed(accountsFeedUri, new AccountFeedCallback() { public void onFailure(CallErrorException caught) { showStatus("An error occurred while retrieving the Analytics " + "Accounts feed: " + caught.getMessage(), true); } public void onSuccess(AccountFeed result) { AccountEntry[] entries = result.getEntries(); if (entries.length == 0) { showStatus("You have no Analytics accounts.", false); } else { AccountEntry targetEntry = entries[0]; queryData(targetEntry.getTableId().getValue()); } } }); } /** * Retrieves a data feed for an Analytics account using a Query object. * In GData, feed URIs can contain querystring parameters. The * GData query objects aid in building parameterized feed URIs. * Upon successfully receiving the data feed, the data entries are displayed * to the user via the showData method. * Query parameters are specified for start and end dates, dimensions, * metrics, sort field and direction, max results and the IDs of the * account tables which should be queried. * * @param tableId The id of the account table for which to retrieve the * Analytics data. */ private void queryData(String tableId) { DataQuery query = DataQuery.newInstance("https://www.google.com/analytics/feeds/data"); query.setStartDate("2009-07-01"); query.setEndDate("2009-07-31"); query.setDimensions("ga:pageTitle,ga:pagePath"); query.setMetrics("ga:pageviews"); query.setSort("-ga:pageviews"); query.setMaxResults(10); query.setIds(tableId); showStatus("Loading data feed...", false); service.getDataFeed(query, new DataFeedCallback() { public void onFailure(CallErrorException caught) { showStatus( "An error occurred while retrieving the Analytics Data " + "feed: " + caught.getMessage(), true); } public void onSuccess(DataFeed result) { showData(result.getEntries()); } }); } /** * Displays a set of Analytics data entries in a tabular fashion with * the help of a GWT FlexTable widget. The data fields Page Title, Page Path * and Pageviews are displayed. * * @param entries The Analytics data entries to display. */ private void showData(DataEntry[] entries) { mainPanel.clear(); String[] labels = new String[] { "Page Title", "Page Path", "Pageviews" }; mainPanel.insertRow(0); for (int i = 0; i < labels.length; i++) { mainPanel.addCell(0); mainPanel.setWidget(0, i, new Label(labels[i])); mainPanel.getFlexCellFormatter().setStyleName(0, i, "hm-tableheader"); } for (int i = 0; i < entries.length; i++) { DataEntry entry = entries[i]; int row = mainPanel.insertRow(i + 1); mainPanel.addCell(row); mainPanel.setWidget(row, 0, new Label(entry.getStringValueOf("ga:pageTitle"))); mainPanel.addCell(row); mainPanel.setWidget(row, 1, new Label(entry.getStringValueOf("ga:pagePath"))); mainPanel.addCell(row); mainPanel.setWidget(row, 2, new Label("" + entry.getNumericValueOf("ga:pageviews"))); } } /** * Displays a status message to the user. * * @param message The message to display. * @param isError Indicates whether the status is an error status. */ private void showStatus(String message, boolean isError) { mainPanel.clear(); mainPanel.insertRow(0); mainPanel.addCell(0); Label msg = new Label(message); if (isError) { msg.setStylePrimaryName("hm-error"); } mainPanel.setWidget(0, 0, msg); } /** * Starts this demo. */ private void startDemo() { service = AnalyticsService.newInstance("HelloGData_Analytics_TopPagesDemo_v2.0"); if (User.getStatus(scope) == AuthSubStatus.LOGGED_IN) { getAccounts("https://www.google.com/analytics/feeds/accounts/" + "default?max-results=50"); } else { showStatus("You are not logged on to Google Analytics.", true); } } }