org.apache.pulsar.client.impl

Class ConsumerInterceptors<T>

java.lang.Object

org.apache.pulsar.client.impl.ConsumerInterceptors<T>

All Implemented Interfaces:

Closeable, AutoCloseable

public class ConsumerInterceptors<T>
extends Object
implements Closeable

A container that hold the list ConsumerInterceptor and wraps calls to the chain of custom interceptors.

Constructor Summary

Constructors

Constructor and Description
ConsumerInterceptors(List<ConsumerInterceptor<T>> interceptors)

Method Summary

Modifier and Type	Method and Description
Message<T>	beforeConsume(Consumer<T> consumer, Message<T> message) This is called just before the message is returned by Consumer.receive(), MessageListener.received(Consumer, Message) or the CompletableFuture returned by Consumer.receiveAsync() completes.
void	close()
void	onAcknowledge(Consumer<T> consumer, MessageId messageId, Throwable exception) This is called when acknowledge request return from the broker.
void	onAcknowledgeCumulative(Consumer<T> consumer, MessageId messageId, Throwable exception) This is called when acknowledge cumulative request return from the broker.
void	onAckTimeoutSend(Consumer<T> consumer, Set<MessageId> messageIds) This is called when a redelivery from an acknowledge timeout occurs.
void	onNegativeAcksSend(Consumer<T> consumer, Set<MessageId> messageIds) This is called when a redelivery from a negative acknowledge occurs.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ConsumerInterceptors

public ConsumerInterceptors(List<ConsumerInterceptor<T>> interceptors)

Method Detail

beforeConsume

public Message<T> beforeConsume(Consumer<T> consumer,
                                Message<T> message)

This is called just before the message is returned by Consumer.receive(), MessageListener.received(Consumer, Message) or the CompletableFuture returned by Consumer.receiveAsync() completes.

This method calls ConsumerInterceptor.beforeConsume(Consumer, Message) for each interceptor. Messages returned from each interceptor get passed to beforeConsume() of the next interceptor in the chain of interceptors.

This method does not throw exceptions. If any of the interceptors in the chain throws an exception, it gets caught and logged, and next interceptor in int the chain is called with 'messages' returned by the previous successful interceptor beforeConsume call.

Parameters:

consumer - the consumer which contains the interceptors

message - message to be consume by the client.

Returns:

messages that are either modified by interceptors or same as messages passed to this method.

onAcknowledge

public void onAcknowledge(Consumer<T> consumer,
                          MessageId messageId,
                          Throwable exception)

This is called when acknowledge request return from the broker.

This method calls ConsumerInterceptor.onAcknowledge(Consumer, MessageId, Throwable) method for each interceptor.

This method does not throw exceptions. Exceptions thrown by any of interceptors in the chain are logged, but not propagated.

Parameters:

consumer - the consumer which contains the interceptors

messageId - message to acknowledge.

exception - exception returned by broker.

onAcknowledgeCumulative

public void onAcknowledgeCumulative(Consumer<T> consumer,
                                    MessageId messageId,
                                    Throwable exception)

This is called when acknowledge cumulative request return from the broker.

This method calls ConsumerInterceptor.onAcknowledgeCumulative(Consumer, MessageId, Throwable) (Message, Throwable)} method for each interceptor.

This method does not throw exceptions. Exceptions thrown by any of interceptors in the chain are logged, but not propagated.

Parameters:

consumer - the consumer which contains the interceptors

messageId - messages to acknowledge.

exception - exception returned by broker.

onNegativeAcksSend

public void onNegativeAcksSend(Consumer<T> consumer,
                               Set<MessageId> messageIds)

This is called when a redelivery from a negative acknowledge occurs.

This method calls onNegativeAcksSend(Consumer, Set<MessageId>) method for each interceptor.

This method does not throw exceptions. Exceptions thrown by any of interceptors in the chain are logged, but not propagated.

Parameters:

consumer - the consumer which contains the interceptors.

messageIds - set of message IDs being redelivery due a negative acknowledge.

onAckTimeoutSend

public void onAckTimeoutSend(Consumer<T> consumer,
                             Set<MessageId> messageIds)

This is called when a redelivery from an acknowledge timeout occurs.

This method calls onAckTimeoutSend(Consumer, Set<MessageId>) method for each interceptor.

This method does not throw exceptions. Exceptions thrown by any of interceptors in the chain are logged, but not propagated.

Parameters:

consumer - the consumer which contains the interceptors.

messageIds - set of message IDs being redelivery due an acknowledge timeout.

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

IOException