OutgoingLinkImpl.java

/*
 * Copyright 2011 the original author or authors.
 *
 * 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 io.vertx.ext.amqp.impl.protocol;

import io.vertx.ext.amqp.ErrorCode;
import io.vertx.ext.amqp.MessageFormatException;
import io.vertx.ext.amqp.MessagingException;
import org.apache.qpid.proton.amqp.transport.SenderSettleMode;
import org.apache.qpid.proton.engine.Delivery;
import org.apache.qpid.proton.engine.Link;
import org.apache.qpid.proton.engine.Sender;

import java.nio.ByteBuffer;

class OutgoingLinkImpl extends BaseLink implements OutgoingLink {
  OutgoingLinkImpl(SessionImpl ssn, String address, Link link) {
    super(ssn, address, link);
  }

  @Override
  public void offerCredits(int credits) throws MessagingException {
    ((Sender) _link).offer(credits);
    _ssn.getConnection().write();
  }

  void init() {
    _link.open();
  }

  @Override
  public boolean isInbound() {
    return false;
  }

  @Override
  public int getUnsettled() throws MessagingException {
    checkClosed();
    return _link.getUnsettled();
  }

  @Override
  public TrackerImpl send(AmqpMessage msg) throws MessageFormatException, MessagingException {
    checkClosed();
    if (msg instanceof AmqpMessageImpl) {
      return send(((AmqpMessageImpl) msg).getProtocolMessage());
    } else {
      throw new MessageFormatException("Unsupported message implementation", ErrorCode.INVALID_MSG_FORMAT);
    }
  }

  TrackerImpl send(org.apache.qpid.proton.message.Message m) throws MessageFormatException, MessagingException {
    checkClosed();
    Sender sender = (Sender) _link;
    byte[] tag = longToBytes(_ssn.getNextDeliveryTag());
    Delivery delivery = sender.delivery(tag);
    TrackerImpl tracker = new TrackerImpl(_ssn);
    delivery.setContext(tracker);

    if (m.getAddress() == null) {
      m.setAddress(_address);
    }
    byte[] buffer = new byte[1024];
    int encoded = m.encode(buffer, 0, buffer.length);
    sender.send(buffer, 0, encoded);
    if (sender.getSenderSettleMode() == SenderSettleMode.SETTLED) {
      delivery.settle();
      tracker.markSettled();
    }
    sender.advance();
    _ssn.getConnection().write();
    return tracker;
  }

  private static byte[] longToBytes(final long value) {
    ByteBuffer buffer = ByteBuffer.allocate(8);
    buffer.putLong(value);
    return buffer.array();
  }
}