Question

我想尽可能地缩小这段Java代码：

Consumer consumerone = new DefaultConsumer(channel) {
    @Override
    public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties,
            byte[] body) throws IOException {
        processobjone(body);
    }
};
channel.basicConsume(QUEUE_FIRST_NAME, true, consumerone);

Consumer consumersec = new DefaultConsumer(channel) {
    @Override
    public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties,
            byte[] body) throws IOException {
        processobjsec(body);
    }
};
channel.basicConsume(QUEUE_SEC_NAME, true, consumersec);

// Processing

private void processobjone(byte[] body) {       
    // handle obj
}

private void processobjsec(byte[] body) {   
    // handle obj
}

// .... and many more

我尝试了这种可能的解决方案但是我遇到了多个错误：

import java.util.function.Consumer;

Map<String, Consumer<byte[]>> queueToConsumer = new HashMap<>();
queueToConsumer.put(ElementTypeEnum.QUEUE_TRANSACTION, this::process_transaction);
queueToConsumer.put(ElementTypeEnum.QUEUE_API_ATTEMPT, this::process_api_attempt);

queueToConsumer.forEach((queueName, consumer) -> {
    channel.basicConsume(queueName, true, new DefaultConsumer() {
        @Override
        public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
            consumer.accept(body);
        }
    });
});

private void process_transaction(byte[] vv) {       
}

private void process_api_attempt(byte[] vv) {       
}

这些是我做出更改时的错误：

The method basicConsume(String, boolean, Consumer) in the type Channel is not applicable for the arguments (String, boolean, new DefaultConsumer(){})

您能告诉我如何解决问题吗？可能我需要更改用于重定向到正确的Java方法的模式？

Answer 1

看起来没有导入DefaultConsumer，导致编译器无法识别它

未定义的方法类型

1 个答案: