Examples of GcsOutputChannel

com.google.appengine.tools.cloudstorage.GcsOutputChannel
A writable byte channel for writing data to Google Cloud Storage. Write calls will either place the data into an internal buffer or make a synchronous RPC call to write the data. Implementations of this class may further buffer data internally to reduce remote calls. Calling {@link #close()} will cause any buffers to be flushed and all data written to be storeddurably. After this point the file can be read but no longer written to. Not calling close will result in the file not ever being written durably and it will automatically disappear from Google Cloud Storage. This class is serializable, this allows for writing part of a file, serializing the GcsOutputChannel deserializing it, and continuing to write to the same file. The time for which a serialized instance is valid is limited and determined by the Google Cloud Storage service. Note that this is not intended as a way to create multiple GcsOutputChannel objects for the same file. Even if one serializes and deserialzes this object, only one of the original instance or the deserialized instance may be used going forward. Using both in parallel will result in undefined behavior.

Examples of com.google.appengine.tools.cloudstorage.GcsOutputChannel

   * If the request path is /gcs/Foo/Bar this will be interpreted as
   * a request to create a GCS file named Bar in bucket Foo.
   */
  @Override
  public void doPost(HttpServletRequest req, HttpServletResponse resp) throws IOException {
    GcsOutputChannel outputChannel =
        gcsService.createOrReplace(getFileName(req), GcsFileOptions.getDefaultInstance());
    copy(req.getInputStream(), Channels.newOutputStream(outputChannel));
  }

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Examples of com.google.appengine.tools.cloudstorage.GcsOutputChannel

        .mimeType("text/html")
        .acl("public-read")
        .addUserMetadata("myfield1", "my field value")
        .build();


    GcsOutputChannel writeChannel = gcsService.createOrReplace(filename, options);
    PrintWriter writer = new PrintWriter(Channels.newWriter(writeChannel, "UTF8"));
    writer.println("The woods are lovely dark and deep.");
    writer.println("But I have promises to keep.");
    writer.flush();


    writeChannel.waitForOutstandingWrites();


    writeChannel.write(ByteBuffer.wrap("And miles to go before I sleep.".getBytes("UTF8")));


    writeChannel.close();
    resp.getWriter().println("Done writing...");




    GcsInputChannel readChannel = null;
    BufferedReader reader = null;

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Examples of com.google.appengine.tools.cloudstorage.GcsOutputChannel

   *
   * Notice at the end closing the ObjectOutputStream is not done in a finally block.
   * See below for why.
   */
  private void writeObjectToFile(GcsFilename fileName, Object content) throws IOException {
    GcsOutputChannel outputChannel =
        gcsService.createOrReplace(fileName, GcsFileOptions.getDefaultInstance());
    @SuppressWarnings("resource")
    ObjectOutputStream oout =
        new ObjectOutputStream(Channels.newOutputStream(outputChannel));
    oout.writeObject(content);

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Examples of com.google.appengine.tools.cloudstorage.GcsOutputChannel

   * finally.This is intentional. Because the file only exists for reading if close is called, if
   * there is an exception thrown while writing the file won't ever exist. (This way there is no
   * need to worry about cleaning up partly written files)
   */
  private void writeToFile(GcsFilename fileName, byte[] content) throws IOException {
    @SuppressWarnings("resource")
    GcsOutputChannel outputChannel =
        gcsService.createOrReplace(fileName, GcsFileOptions.getDefaultInstance());
    outputChannel.write(ByteBuffer.wrap(content));
    outputChannel.close();
  }

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Examples of com.google.appengine.tools.cloudstorage.GcsOutputChannel

    em.close();
    RosieRecordsService rrs = new RosieRecordsService();
    GcsFilename filename = new GcsFilename(BUCKETNAME, "RosieConversion_" + (new Date()).toString());
    GcsFileOptions options = new GcsFileOptions.Builder().mimeType("text/html").acl("public-read").build();
        //.addUserMetadata("myfield1", "my field value").build();
    GcsOutputChannel writeChannel;
    try {
      writeChannel = gcsService.createOrReplace(filename, options);
      // You can write to the channel using the standard Java methods.
      // Here we use a PrintWriter:
      PrintWriter out = new PrintWriter(Channels.newWriter(writeChannel, "UTF8"));
      for (Long id_count = id_min; id_count <= id_max;  id_count++) {
        //write record value as a new line in Google Cloud Storage object
        rr = rrs.getRosieRecords(Long.valueOf(id_count));
        if (rr.getUsed() != 1) {
          log.info("writing out rosie record id: " + id_count);
          out.print(rr.getValue());
          out.flush();
          rrs.setRosieRecordsUsed(id_count);
        }
      }
      log.info("Done writing...");
      writeChannel.close();
    } catch (IOException e) {
      log.info("problem writing to GCS");
      e.printStackTrace();
    }
  }

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Examples of com.google.appengine.tools.cloudstorage.GcsOutputChannel

            .contentDisposition("Content-Disposition: attachment")
            .mimeType("text/html")
            .addUserMetadata("userKey", "UserMetadata")
            .build();


        GcsOutputChannel writeChannel = gcsService.createOrReplace(filename, option);
        try (PrintWriter out = new PrintWriter(Channels.newWriter(writeChannel, "UTF8"))) {
            out.println(CONTENT);
            out.flush();
        }

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