Add file for coming-soon Java quickstart guide.

AndyDiamondstein · web-flow · commit b9e6a9aea0a9 · 2017-04-25T10:47:29.000-04:00
diff --git a/java/src/main/java/com/google/api/services/samples/youtube/cmdline/data/Quickstart.java b/java/src/main/java/com/google/api/services/samples/youtube/cmdline/data/Quickstart.java
@@ -0,0 +1,119 @@
+import com.google.api.client.auth.oauth2.Credential;
+import com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp;
+import com.google.api.client.extensions.jetty.auth.oauth2.LocalServerReceiver;
+import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow;
+import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets;
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.HttpTransport;
+import com.google.api.client.json.jackson2.JacksonFactory;
+import com.google.api.client.json.JsonFactory;
+import com.google.api.client.util.store.FileDataStoreFactory;
+
+import com.google.api.services.youtube.YouTubeScopes;
+import com.google.api.services.youtube.model.*;
+import com.google.api.services.youtube.YouTube;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.Arrays;
+import java.util.List;
+
+
+public class Quickstart {
+
+    /** Application name. */
+    private static final String APPLICATION_NAME = "API Sample";
+
+    /** Directory to store user credentials for this application. */
+    private static final java.io.File DATA_STORE_DIR = new java.io.File(
+        System.getProperty("user.home"), ".credentials/youtube-java-quickstart");
+
+    /** Global instance of the {@link FileDataStoreFactory}. */
+    private static FileDataStoreFactory DATA_STORE_FACTORY;
+
+    /** Global instance of the JSON factory. */
+    private static final JsonFactory JSON_FACTORY =
+        JacksonFactory.getDefaultInstance();
+
+    /** Global instance of the HTTP transport. */
+    private static HttpTransport HTTP_TRANSPORT;
+
+    /** Global instance of the scopes required by this quickstart.
+     *
+     * If modifying these scopes, delete your previously saved credentials
+     * at ~/.credentials/drive-java-quickstart
+     */
+    private static final List<String> SCOPES =
+        Arrays.asList(YouTubeScopes.YOUTUBE_READONLY);
+
+    static {
+        try {
+            HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+            DATA_STORE_FACTORY = new FileDataStoreFactory(DATA_STORE_DIR);
+        } catch (Throwable t) {
+            t.printStackTrace();
+            System.exit(1);
+        }
+    }
+
+    /**
+     * Create an authorized Credential object.
+     * @return an authorized Credential object.
+     * @throws IOException
+     */
+    public static Credential authorize() throws IOException {
+        // Load client secrets.
+        InputStream in =
+            Quickstart.class.getResourceAsStream("/client_secret.json");
+        GoogleClientSecrets clientSecrets =
+            GoogleClientSecrets.load(JSON_FACTORY, new InputStreamReader(in));
+
+        // Build flow and trigger user authorization request.
+        GoogleAuthorizationCodeFlow flow =
+                new GoogleAuthorizationCodeFlow.Builder(
+                        HTTP_TRANSPORT, JSON_FACTORY, clientSecrets, SCOPES)
+                .setDataStoreFactory(DATA_STORE_FACTORY)
+                .setAccessType("offline")
+                .build();
+        Credential credential = new AuthorizationCodeInstalledApp(
+            flow, new LocalServerReceiver()).authorize("user");
+        return credential;
+    }
+
+    /**
+     * Build and return an authorized API client service, such as a YouTube
+     * Data API client service.
+     * @return an authorized API client service
+     * @throws IOException
+     */
+    public static YouTube getYouTubeService() throws IOException {
+        Credential credential = authorize();
+        return new YouTube.Builder(HTTP_TRANSPORT, JSON_FACTORY, credential)
+                .setApplicationName(APPLICATION_NAME)
+                .build();
+    }
+
+    public static void main(String[] args) throws IOException {
+        YouTube youtube = getYouTubeService();
+        try {
+            YouTube.Channels.List channelsListByUsernameRequest = youtube.channels().list("snippet,contentDetails,statistics");
+            channelsListByUsernameRequest.setForUsername("GoogleDevelopers");
+
+            ChannelListResponse response = channelsListByUsernameRequest.execute();
+            Channel channel = response.getItems().get(0);
+            System.out.printf(
+                "This channel's ID is %s. Its title is '%s', and it has %s views.\n",
+                channel.getId(),
+                channel.getSnippet().getTitle(),
+                channel.getStatistics().getViewCount());
+        } catch (GoogleJsonResponseException e) {
+            e.printStackTrace();
+            System.err.println("There was a service error: " +
+                e.getDetails().getCode() + " : " + e.getDetails().getMessage());
+        } catch (Throwable t) {
+            t.printStackTrace();
+        }
+    }
+}
