org.apache.qpid.proton.engine.Delivery Maven / Gradle / Ivy
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*
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* to you under the Apache License, Version 2.0 (the
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*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
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*/
package org.apache.qpid.proton.engine;
import org.apache.qpid.proton.amqp.transport.DeliveryState;
/**
* A delivery of a message on a particular link.
*
* Whilst a message is logically a long-lived object, a delivery is short-lived - it
* is only intended to be used by the application until it is settled and all its data has been read.
*/
public interface Delivery extends Extendable
{
public byte[] getTag();
public Link getLink();
public DeliveryState getLocalState();
public DeliveryState getRemoteState();
/**
* updates the state of the delivery
*
* @param state the new delivery state
*/
public void disposition(DeliveryState state);
/**
* Settles this delivery.
*
* Causes the delivery to be removed from the connection's work list (see {@link Connection#getWorkHead()}).
* If this delivery is its link's current delivery, the link's current delivery pointer is advanced.
*/
public void settle();
/**
* Returns whether this delivery has been settled.
*
* TODO proton-j and proton-c return the local and remote statuses respectively. Resolve this ambiguity.
*
* @see #settle()
*/
public boolean isSettled();
public boolean remotelySettled();
/**
* TODO When does an application call this method? Do we really need this?
*/
public void free();
/**
* @see Connection#getWorkHead()
*/
public Delivery getWorkNext();
public Delivery next();
public boolean isWritable();
/**
* Returns whether this delivery has data ready to be received.
*
* @see Receiver#recv(byte[], int, int)
*/
public boolean isReadable();
public void setContext(Object o);
public Object getContext();
/**
* Returns whether this delivery's state or settled flag has ever remotely changed.
*
* TODO what is the main intended use case for calling this method?
*/
public boolean isUpdated();
public void clear();
public boolean isPartial();
public int pending();
public boolean isBuffered();
/**
* Configures a default DeliveryState to be used if a
* received delivery is settled/freed without any disposition
* state having been previously applied.
*
* @param state the default delivery state
*/
public void setDefaultDeliveryState(DeliveryState state);
public DeliveryState getDefaultDeliveryState();
/**
* Sets the message-format for this Delivery, representing the 32bit value using an int.
*
* The default value is 0 as per the message format defined in the core AMQP 1.0 specification.
*
* See the following for more details:
*
* http://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-transport-v1.0-os.html#type-transfer
*
* http://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-transport-v1.0-os.html#type-message-format
*
* http://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-messaging-v1.0-os.html#section-message-format
*
* http://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-messaging-v1.0-os.html#definition-MESSAGE-FORMAT
*
* @param messageFormat the message format
*/
public void setMessageFormat(int messageFormat);
/**
* Gets the message-format for this Delivery, representing the 32bit value using an int.
*
* @return the message-format
* @see #setMessageFormat(int)
*/
public int getMessageFormat();
}