Pull cacheinvalidations code directory into chromium repo.

third_party/cacheinvalidation/src/javaexample/com/google/ipc/invalidation/examples/android2/MainActivity.java

Index: third_party/cacheinvalidation/src/javaexample/com/google/ipc/invalidation/examples/android2/MainActivity.java
diff --git a/third_party/cacheinvalidation/src/javaexample/com/google/ipc/invalidation/examples/android2/MainActivity.java b/third_party/cacheinvalidation/src/javaexample/com/google/ipc/invalidation/examples/android2/MainActivity.java
new file mode 100644
index 0000000000000000000000000000000000000000..e748ff69a7f929466bdb3052003e2f732bd228f4
--- /dev/null
+++ b/third_party/cacheinvalidation/src/javaexample/com/google/ipc/invalidation/examples/android2/MainActivity.java
@@ -0,0 +1,221 @@
+/*
+ * Copyright 2011 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.ipc.invalidation.examples.android2;
+
+import com.google.ipc.invalidation.external.client.contrib.MultiplexingGcmListener;
+import com.google.ipc.invalidation.external.client.types.ObjectId;
+
+import android.app.Activity;
+import android.content.Context;
+import android.os.Bundle;
+import android.util.Log;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.ViewGroup.LayoutParams;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+import java.nio.charset.Charset;
+
+/**
+ * A simple  sample application that displays information about object registrations and
+ * versions.
+ *
+ * <p>To submit invalidations, you can run the ExampleServlet:
+ *
+ * <p><code>
+ * blaze run java/com/google/ipc/invalidation/examples:ExampleServlet -- \
+       --publisher_spec="" \
+       --port=8888 \
+       --channel_uri="talkgadget.google.com"
+ * </code>
+ *
+ * <p>and open http://localhost:8888/publisher.
+ *
+ * <p>Just publish invalidations with ids similar to 'Obj1', 'Obj2', ... 'Obj3'
+ *
+ */
+public final class MainActivity extends Activity {
+
+  /** Tag used in logging. */
+  private static final String TAG = "TEA2:MainActivity";
+
+  /**
+   * Keep track of current registration and object status. This should probably be implemented
+   * using intents rather than static state but I don't want to distract from the invalidation
+   * client essentials in this example.
+   */
+  public static final class State {
+    private static volatile String info;
+    private static volatile MainActivity currentActivity;
+
+    public static void setInfo(String info) {
+      State.info = info;
+      refreshInfo();
+    }
+  }
+
+  /** Text view showing current {@link ExampleListenerState}. */
+  private TextView info;
+
+  /** Text view used to display error messages. */
+  private TextView error;
+
+  /** Called when the activity is first created. */
+  @Override
+  public void onCreate(Bundle savedInstanceState) {
+    Log.i(TAG, "[onCreate] Creating main activity");
+    super.onCreate(savedInstanceState);
+
+    MultiplexingGcmListener.initializeGcm(this);
+
+    // Setup UI.
+    LinearLayout layout = new LinearLayout(this);
+    layout.setOrientation(LinearLayout.VERTICAL);
+    layout.addView(createClientLifetimeButtons(), LayoutParams.WRAP_CONTENT);
+    layout.addView(createRegistrationControls(), LayoutParams.WRAP_CONTENT);
+    error = new TextView(this);
+    layout.addView(error, LayoutParams.WRAP_CONTENT);
+    info = new TextView(this);
+    layout.addView(info, LayoutParams.WRAP_CONTENT);
+    setContentView(layout);
+
+    // Remember the current activity since the TICL service in this example communicates via
+    // static state.
+    State.currentActivity = this;
+    Log.i(TAG, "[onCreate] Calling refresh data from main activity");
+    refreshInfo();
+  }
+
+  /** Creates start and stop buttons. */
+  private View createClientLifetimeButtons() {
+    LinearLayout layout = new LinearLayout(this);
+    layout.setOrientation(LinearLayout.HORIZONTAL);
+
+    // Start button.
+    Button startButton = new Button(this);
+    startButton.setText("Start");
+    startButton.setOnClickListener(new OnClickListener() {
+      @Override
+      public void onClick(View v) {
+        v.getContext().startService(ExampleListener.createStartIntent(v.getContext()));
+      }
+    });
+    layout.addView(startButton, LayoutParams.WRAP_CONTENT);
+
+    // Stop button.
+    Button stopButton = new Button(this);
+    stopButton.setText("Stop");
+    stopButton.setOnClickListener(new OnClickListener() {
+      @Override
+      public void onClick(View v) {
+        v.getContext().startService(ExampleListener.createStopIntent(v.getContext()));
+      }
+    });
+    layout.addView(stopButton, LayoutParams.WRAP_CONTENT);
+
+    return layout;
+  }
+
+  private View createRegistrationControls() {
+    LinearLayout layout = new LinearLayout(this);
+    layout.setOrientation(LinearLayout.VERTICAL);
+
+    // Create the source text field
+    LinearLayout fieldsLayout = new LinearLayout(this);
+    fieldsLayout.setOrientation(LinearLayout.HORIZONTAL);
+    TextView sourceText = new TextView(this);
+    sourceText.setText("source:");
+    fieldsLayout.addView(sourceText, LayoutParams.WRAP_CONTENT);
+    final EditText sourceField = new EditText(this);
+    sourceField.setText("DEMO");
+    fieldsLayout.addView(sourceField, LayoutParams.WRAP_CONTENT);
+
+    // Create the name text field
+    TextView nameText = new TextView(this);
+    nameText.setText("name:");
+    fieldsLayout.addView(nameText, LayoutParams.WRAP_CONTENT);
+    final EditText nameField = new EditText(this);
+    nameField.setText("Obj1");
+    fieldsLayout.addView(nameField, LayoutParams.WRAP_CONTENT);
+    layout.addView(fieldsLayout, LayoutParams.WRAP_CONTENT);
+
+    // Shared click listener class for registration (register and unregister).
+    abstract class RegistrationClickListener implements OnClickListener {
+      @Override
+      public void onClick(View v) {
+        String sourceText = sourceField.getText().toString();
+        // Build object id from relevant fields. Can't use reflection because this is Android.
+        final int source;
+        if ("DEMO".equals(sourceText)) {
+          source = 4;
+        } else if ("TEST".equals(sourceText)) {
+          source = 2;
+        } else {
+          error.setText("Unrecognized source: " + sourceText);
+          return;
+        }
+
+        String name = nameField.getText().toString();
+        ObjectId objectId =
+            ObjectId.newInstance(source, name.getBytes(Charset.forName("UTF-8")));
+        performRegistration(v.getContext(), objectId);
+      }
+
+      abstract void performRegistration(Context context, ObjectId objectId);
+    }
+
+    // Create the reg/unreg buttons
+    LinearLayout buttonsLayout = new LinearLayout(this);
+    buttonsLayout.setOrientation(LinearLayout.HORIZONTAL);
+    Button regButton = new Button(this);
+    regButton.setText("Register");
+    regButton.setOnClickListener(new RegistrationClickListener() {
+      @Override
+      void performRegistration(Context context, ObjectId objectId) {
+        context.startService(ExampleListener.createRegisterIntent(context, objectId));
+      }
+    });
+    Button unregButton = new Button(this);
+    unregButton.setText("Unregister");
+    unregButton.setOnClickListener(new RegistrationClickListener() {
+      @Override
+      void performRegistration(Context context, ObjectId objectId) {
+        context.startService(ExampleListener.createUnregisterIntent(context, objectId));
+      }
+    });
+    buttonsLayout.addView(regButton, LayoutParams.WRAP_CONTENT);
+    buttonsLayout.addView(unregButton, LayoutParams.WRAP_CONTENT);
+    layout.addView(buttonsLayout, LayoutParams.WRAP_CONTENT);
+    return layout;
+  }
+
+  /** Updates UI with current registration status and object versions. */
+  private static void refreshInfo() {
+    final MainActivity activity = State.currentActivity;
+    if (null != activity) {
+      activity.info.post(new Runnable() {
+        @Override
+        public void run() {
+          activity.info.setText(State.info);
+        }
+      });
+    }
+  }
+}