producer

问题 Producer methods are very useful for creating instances programmatically and publishing them in a context. The problem is that all properties of an instance created by new and returned by a producer method are not injected by CDI. In the Weld documentation I've read that this is an intentional behaviour, but in many cases injection in those beans would be very useful. Is there a workaround to enable injection into such beans? 回答1: First, I have to ask why you are using Producers for beans

问题 I have installed Kafka and doing some basic testing. I am able to create topics using scripts provided under Kafka-broker/bin folder. But when I am trying to produce message getting below WARNing every time I run this. And no message is getting generated. Please advice. [root@node2 bin]# ./kafka-console-producer.sh --broker-list localhost:9092 --topic test_master >testmsg1 [2019-05-15 06:25:19,092] WARN [Producer clientId=console-producer] Connection to node -1 could not be established.

问题 My Python version is 3.6.1. I wrote something to implement a model of consumer-producer with Python asyncio. But it doesn't work as expected. Four events all created but none of any print export. async def consumer(queue, id): while True: val = await queue.get() print('{} get a val: {}'.format(id, val)) await asyncio.sleep(1) async def producer(queue, id): for i in range(5): val = random.randint(1, 10) await queue.put(val) print('{} put a val: {}'.format(id, val)) await asyncio.sleep(1) async

问题 I would like to create a Spring's bean producer method which is aware who invoked it, so I've started with the following code: @Configuration public class LoggerProvider { @Bean @Scope("prototype") public Logger produceLogger() { // get known WHAT bean/component invoked this producer Class<?> clazz = ... return LoggerFactory.getLogger(clazz); } } How can I get the information who wants to get the bean injected? I'm looking for some equivalent of CDI's InjectionPoint in Spring world. 回答1: As

问题 I have several questions about Kafka. If someone can help me by responding to one of them, i will be very thankful. Thank you in advance :) Q1) I know that partitions are split across Kafka Broker. But the split is based on what ?. For instance, if I have 3 brokers and 6 partitions, how to ensure that each broker will have 2 partitions ? How this split is currently made in Kafka ? Q2) When a producer send a new message, what id the default format of the message ? Avro format ? How can I

问题 I have following classes : package com.akshu.multithreading; public class ThreadResource { static int a; static boolean Value =false; public synchronized int getA() { while(Value == false){ try { wait(); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } Value= false; notify(); return a; } public synchronized void setA(int a) { while(Value == true) { try { wait(); } catch (InterruptedException e) { // TODO Auto-generated catch block e

问题 First off I googled intensively and according to http://jglue.org/cdi-unit-user-guide/ producing stuff to inject in a unit test should work just fine. My setup: @RunWith(CdiRunner.class) public abstract class CdiUnitBaseTest extends DBUnitBaseTest { @Produces public EntityManager em() { return em; //field from base class filled @BeforeClass } @Produces public Logger logger() { return LogManager.getLogger(); } } public class SurveyBeanTest extends CdiUnitBaseTest { @Inject private SurveyBean

问题 I'm really new to JEE CDI but tried half of last night to find a solution to a problem. I have a Controller Class that, when startup is called, should inject a stateful bean using a Producer depending on a parameter. This mentioned stateful bean itself contains an injected bean itself. To be honest, not sure if this works at all, any feedback is highly appreciated=) Here is some dummy code that should help understand what I want to do (based oin https://docs.jboss.org/weld/reference/1.0.0/en

问题 I’m writing a program that implements the Producer Consumer problem in Java using multithreading concepts. Below are few details how I’m supposed to do it: 1) The main thread should create a buffer with capacity specified as a command line argument. The number of producer and consumer threads are also specified as command line arguments. I’m supposed to assign a unique number to each producer and consumer thread. How do I assign a unique number to producer and consumer threads? 2) The

问题 Please copy the program below and try running in your IDE. It's a simple Produce Consumer implementation - it runs fine when I use one Producer and one Consumer thread but fails when using 2 each. Please let me know the reason why this program hangs or is there anything else wrong with it. import java.util.LinkedList; import java.util.Queue; public class PCQueue { private volatile Queue<Product> productQueue = new LinkedList<Product>(); public static void main(String[] args) { PCQueue pc =