程序包 org.apache.pulsar.client.api

接口 MessagePayloadProcessor

public interface MessagePayloadProcessor

The processor to process a message payload. It's responsible to convert the raw buffer to some messages, then trigger some callbacks so that consumer can consume these messages and handle the exception if it existed. The most important part is to decode the raw buffer. After that, we can call MessagePayloadContext.getMessageAt(int, int, org.apache.pulsar.client.api.MessagePayload, boolean, org.apache.pulsar.client.api.Schema<T>) or MessagePayloadContext.asSingleMessage(org.apache.pulsar.client.api.MessagePayload, org.apache.pulsar.client.api.Schema<T>) to construct Message for consumer to consume. Since we need to pass the MessagePayload object to these methods, we can use MessagePayloadFactory.DEFAULT to create it or just reuse the payload argument.

字段概要

字段

修饰符和类型	字段	说明
static MessagePayloadProcessor	DEFAULT

方法概要

修饰符和类型	方法	说明
<T> void	process(MessagePayload payload, MessagePayloadContext context, Schema<T> schema, java.util.function.Consumer<Message<T>> messageConsumer)	Process the message payload.

字段详细资料

DEFAULT

static final MessagePayloadProcessor DEFAULT

方法详细资料

process

<T> void process(MessagePayload payload,
                 MessagePayloadContext context,
                 Schema<T> schema,
                 java.util.function.Consumer<Message<T>> messageConsumer)
          throws java.lang.Exception

Process the message payload.

类型参数:

T -

参数:

payload - the payload whose underlying buffer is a Netty ByteBuf

context - the message context that contains the message format information and methods to create a message

schema - the message's schema

messageConsumer - the callback to consume each message

抛出:

java.lang.Exception