import com.google.ipc.invalidation.external.client.android.AndroidInvalidationClient; //导入依赖的package包/类
@Override
protected void start(Request request, Response.Builder response) {
  String clientKey = request.getClientKey();
  AndroidInvalidationClient client = clientManager.get(clientKey);
  if (setResponseStatus(client, request, response)) {
    client.start();
  }
}
 

import com.google.ipc.invalidation.external.client.android.AndroidInvalidationClient; //导入依赖的package包/类
@Override
protected void stop(Request request, Response.Builder response) {
  String clientKey = request.getClientKey();
  AndroidInvalidationClient client = clientManager.get(clientKey);
  if (setResponseStatus(client, request, response)) {
    client.stop();
  }
}
 

import com.google.ipc.invalidation.external.client.android.AndroidInvalidationClient; //导入依赖的package包/类
@Override
protected void register(Request request, Response.Builder response) {
  String clientKey = request.getClientKey();
  AndroidInvalidationClient client = clientManager.get(clientKey);
  if (setResponseStatus(client, request, response)) {
    ObjectId objectId = request.getObjectId();
    client.register(objectId);
  }
}
 

import com.google.ipc.invalidation.external.client.android.AndroidInvalidationClient; //导入依赖的package包/类
@Override
protected void unregister(Request request, Response.Builder response) {
  String clientKey = request.getClientKey();
  AndroidInvalidationClient client = clientManager.get(clientKey);
  if (setResponseStatus(client, request, response)) {
    ObjectId objectId = request.getObjectId();
    client.unregister(objectId);
  }
}
 

import com.google.ipc.invalidation.external.client.android.AndroidInvalidationClient; //导入依赖的package包/类
@Override
protected void acknowledge(Request request, Response.Builder response) {
  String clientKey = request.getClientKey();
  AckHandle ackHandle = request.getAckHandle();
  AndroidInvalidationClient client = clientManager.get(clientKey);
  if (setResponseStatus(client, request, response)) {
    client.acknowledge(ackHandle);
  }
}
 

import com.google.ipc.invalidation.external.client.android.AndroidInvalidationClient; //导入依赖的package包/类
@Override
protected void destroy(Request request, Response.Builder response) {
  String clientKey = request.getClientKey();
  AndroidInvalidationClient client = clientManager.get(clientKey);
  if (setResponseStatus(client, request, response)) {
    client.destroy();
  }
}
 

import com.google.ipc.invalidation.external.client.android.AndroidInvalidationClient; //导入依赖的package包/类
/**
 * If {@code client} is {@code null}, sets the {@code response} status to an error. Otherwise,
 * sets the status to {@code success}.
 * @return whether {@code client} was non-{@code null}.   *
 */
private boolean setResponseStatus(AndroidInvalidationClient client, Request request,
    Response.Builder response) {
  if (client == null) {
    response.setError("Client does not exist: " + request);
    response.setStatus(Status.INVALID_CLIENT);
    return false;
  } else {
    response.setStatus(Status.SUCCESS);
    return true;
  }
}
 

import com.google.ipc.invalidation.external.client.android.AndroidInvalidationClient; //导入依赖的package包/类
private String getClientKey(InvalidationClient client) {
  return ((AndroidInvalidationClient) client).getClientKey();
}