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/*
* Copyright (c) 2018 Google Inc. All Rights Reserved.
*
* 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.android.vts.api;
import com.google.apphosting.api.ApiProxy;
import java.util.Properties;
import java.util.logging.Logger;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletResponse;
/** An abstract class to be subclassed to create API Servlet */
public class BaseApiServlet extends HttpServlet {
private static final Logger logger = Logger.getLogger(BaseApiServlet.class.getName());
/** System Configuration Property class */
protected Properties systemConfigProp = new Properties();
/** Appengine server host name */
protected String hostName;
/**
* This variable is for maximum number of entities per transaction You can find the detail here
* (https://cloud.google.com/datastore/docs/concepts/limits)
*/
protected int MAX_ENTITY_SIZE_PER_TRANSACTION = 300;
@Override
public void init(ServletConfig cfg) throws ServletException {
super.init(cfg);
systemConfigProp =
Properties.class.cast(cfg.getServletContext().getAttribute("systemConfigProp"));
this.MAX_ENTITY_SIZE_PER_TRANSACTION =
Integer.parseInt(systemConfigProp.getProperty("datastore.maxEntitySize"));
ApiProxy.Environment env = ApiProxy.getCurrentEnvironment();
hostName =
env.getAttributes()
.get("com.google.appengine.runtime.default_version_hostname")
.toString();
}
protected void setAccessControlHeaders(HttpServletResponse resp) {
resp.setHeader("Access-Control-Allow-Origin", hostName);
resp.setHeader("Access-Control-Allow-Methods", "GET, PUT, POST, OPTIONS, DELETE");
resp.addHeader("Access-Control-Allow-Headers", "Content-Type");
resp.addHeader("Access-Control-Max-Age", "86400");
}
}
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