content: /*
   * Copyright 2014-2025 Real Logic Limited.
   * Copyright 2015 Kaazing Corporation
   *
   * 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
   *
   * https://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 io.aeron.samples;
  
  import io.aeron.Aeron;
  import io.aeron.Publication;
  import org.agrona.BitUtil;
  import org.agrona.BufferUtil;
  import org.agrona.concurrent.UnsafeBuffer;
  
  /**
   * A publisher application with multiple publications which send fragmented messages to a channel and two different
   * stream IDs. The default STREAM_ID and CHANNEL are configured in {@link SampleConfiguration}.
   * <p>
   * The default channel and stream IDs can be changed by setting Java system properties at the command line, e.g.:
   * {@code -Daeron.sample.channel=aeron:udp?endpoint=localhost:5555 -Daeron.sample.streamId=20}
   */
  public class MultiplePublishersWithFragmentation
  {
      private static final int STREAM_ID_1 = SampleConfiguration.STREAM_ID;
      private static final int STREAM_ID_2 = SampleConfiguration.STREAM_ID + 1;
      private static final String CHANNEL = SampleConfiguration.CHANNEL;
      private static final UnsafeBuffer BUFFER_1 = new UnsafeBuffer(
          BufferUtil.allocateDirectAligned(10000, BitUtil.CACHE_LINE_LENGTH));
      private static final UnsafeBuffer BUFFER_2 = new UnsafeBuffer(
          BufferUtil.allocateDirectAligned(9000, BitUtil.CACHE_LINE_LENGTH));
  
      /**
       * Main method for launching the process.
       *
       * @param args passed to the process.
       */
      public static void main(final String[] args)
      {
          System.out.println(
              "Publishing to " + CHANNEL + " on stream id " + STREAM_ID_1 + " and stream id " + STREAM_ID_2);
  
          try (Aeron aeron = Aeron.connect();
              Publication publication1 = aeron.addPublication(CHANNEL, STREAM_ID_1);
              Publication publication2 = aeron.addPublication(CHANNEL, STREAM_ID_2))
          {
              int j = 1;
              int k = 1;
              final String message1 = "Hello World! " + j;
              BUFFER_1.putBytes(0, message1.getBytes());
              final String message2 = "Hello World! " + k;
              BUFFER_2.putBytes(0, message2.getBytes());
  
              while (j <= 5000 || k <= 5000)
              {
                  boolean offerStatus1 = false;
                  boolean offerStatus2 = false;
                  long result1;
                  long result2;
  
                  while (!(offerStatus1 || offerStatus2))
                  {
                      if (j <= 5000)
                      {
                          result1 = publication1.offer(BUFFER_1, 0, BUFFER_1.capacity());
                          if (result1 > 0)
                          {
                              j++;
                              offerStatus1 = true;
                              System.out.println("Successfully sent data on stream id " +
                                  STREAM_ID_1 + " and data length " + BUFFER_1.capacity() + " at offset " + result1);
                          }
                          else
                          {
                              if (result1 == Publication.BACK_PRESSURED)
                              {
                                  System.out.println(" Offer failed due to back pressure for stream id " + STREAM_ID_1);
                              }
                              else if (result1 == Publication.NOT_CONNECTED)
                              {
                                  System.out.println(" Offer failed because publisher is not yet " +
                                      "connected to subscriber for stream id " + STREAM_ID_1);
                              }
                              else
                              {
                                  System.out.println(" Offer failed due to unexpected reason: " + result1);
                              }
  
                              offerStatus1 = false;
                          }
                      }
  
                      if (k <= 5000)
                      {
                          result2 = publication2.offer(BUFFER_2, 0, BUFFER_2.capacity());
                          if (result2 > 0)
                          {
                              k++;
                              offerStatus2 = true;
                              System.out.println("Successfully sent data on stream id " + STREAM_ID_2 +
                                  " and data length " + BUFFER_2.capacity() + " at offset " + result2);
                          }
                          else
                          {
                              if (result2 == Publication.BACK_PRESSURED)
                              {
                                  System.out.println(" Offer failed because publisher is not yet " +
                                      "connected to subscriber for stream id " + STREAM_ID_2);
                              }
                              else if (result2 == Publication.NOT_CONNECTED)
                              {
                                  System.out.println(
                                      "Offer failed - publisher is not yet connected to subscriber" + STREAM_ID_2);
                              }
                              else
                              {
                                  System.out.println("Offer failed due to unexpected reason: " + result2);
                              }
                              offerStatus2 = false;
                          }
                      }
                  }
              }
  
              System.out.println("Done sending total messages for stream id " +
                  STREAM_ID_1 + " = " + (j - 1) + " and stream id " + STREAM_ID_2 + " = " + (k - 1));
          }
      }
  }
  