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CreateServlet.java
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CreateServlet.java
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/* Copyright 2019 Google LLC
*
* 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.getstarted.background.functions;
import com.google.cloud.pubsub.v1.Publisher;
import com.google.protobuf.ByteString;
import com.google.pubsub.v1.PubsubMessage;
import java.io.IOException;
import java.util.Enumeration;
import java.util.concurrent.ExecutionException;
import java.util.logging.Logger;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/** Servlet for the Translation Request form. */
@WebServlet(
name = "create",
urlPatterns = {"/create"})
public class CreateServlet extends HttpServlet {
private static Logger logger = Logger.getLogger(CreateServlet.class.getName());
@Override
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
req.setAttribute("action", "Add");
req.setAttribute("destination", "create");
req.setAttribute("page", "form");
req.getRequestDispatcher("/base.jsp").forward(req, resp);
}
// [START getting_started_background_app_request]
@Override
public void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
String text = req.getParameter("data");
String sourceLang = req.getParameter("sourceLang");
String targetLang = req.getParameter("targetLang");
Enumeration<String> paramNames = req.getParameterNames();
while (paramNames.hasMoreElements()) {
String paramName = paramNames.nextElement();
logger.warning("Param name: " + paramName + " = " + req.getParameter(paramName));
}
Publisher publisher = (Publisher) getServletContext().getAttribute("publisher");
PubsubMessage pubsubMessage =
PubsubMessage.newBuilder()
.setData(ByteString.copyFromUtf8(text))
.putAttributes("sourceLang", sourceLang)
.putAttributes("targetLang", targetLang)
.build();
try {
publisher.publish(pubsubMessage).get();
} catch (InterruptedException | ExecutionException e) {
throw new ServletException("Exception publishing message to topic.", e);
}
resp.sendRedirect("/");
}
// [END getting_started_background_app_request]
}