如何解决org.apache.camel.FailedToCreateProducerException CaughtExceptionMessage: Failed to create Producer for endpoint?
How to solve org.apache.camel.FailedToCreateProducerException CaughtExceptionMessage: Failed to create Producer for endpoint?
我将 Camel 组件和代码从 2.X.X 升级到 3.7.3
此外,我在 Java 11 中重新编译了源代码,然后才在 Java 8 中工作。
路线示例:
from(direct:xyz)
.to(URL_A)
.transform()
...
问题出现是因为在 to
之后,我得到 null
。
我从 camel-http4
移动到 camel-http
,检查了库的属性,但仍然无法找出问题所在?
我得到的错误:
CaughtExceptionType: org.apache.camel.FailedToCreateProducerException CaughtExceptionMessage: Failed to create Producer for endpoint: direct:xyz1616073923650. Reason: java.lang.NullPointerException StackTrace: org.apache.camel.FailedToCreateProducerException: Failed to create Producer for endpoint: direct:xyz1616073923650. Reason: java.lang.NullPointerException
at org.apache.camel.support.cache.DefaultProducerCache.acquireProducer(DefaultProducerCache.java:154)
at org.apache.camel.processor.RecipientListProcessor.createProcessorExchangePairs(RecipientListProcessor.java:219)
at org.apache.camel.processor.MulticastProcessor.process(MulticastProcessor.java:276)
at org.apache.camel.processor.RecipientList.sendToRecipientList(RecipientList.java:222)
at org.apache.camel.processor.RecipientList.process(RecipientList.java:185)
at org.apache.camel.processor.Pipeline$PipelineTask.run(Pipeline.java:90)
at org.apache.camel.impl.engine.DefaultReactiveExecutor$Worker.schedule(DefaultReactiveExecutor.java:148)
at org.apache.camel.impl.engine.DefaultReactiveExecutor.scheduleMain(DefaultReactiveExecutor.java:60)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:147)
at org.apache.camel.impl.engine.CamelInternalProcessor.process(CamelInternalProcessor.java:312)
at org.apache.camel.component.direct.DirectProducer.process(DirectProducer.java:84)
at org.apache.camel.impl.engine.SharedCamelInternalProcessor.process(SharedCamelInternalProcessor.java:218)
at org.apache.camel.impl.engine.SharedCamelInternalProcessor.process(SharedCamelInternalProcessor.java:112)
at org.apache.camel.impl.engine.DefaultAsyncProcessorAwaitManager.process(DefaultAsyncProcessorAwaitManager.java:83)
at org.apache.camel.impl.engine.SharedCamelInternalProcessor.process(SharedCamelInternalProcessor.java:109)
at org.apache.camel.support.cache.DefaultProducerCache.send(DefaultProducerCache.java:189)
at org.apache.camel.impl.engine.DefaultProducerTemplate.send(DefaultProducerTemplate.java:176)
at org.apache.camel.impl.engine.DefaultProducerTemplate.send(DefaultProducerTemplate.java:172)
at org.apache.camel.impl.engine.DefaultProducerTemplate.send(DefaultProducerTemplate.java:153)
at org.apache.camel.impl.engine.DefaultProducerTemplate.sendBody(DefaultProducerTemplate.java:187)
at org.apache.camel.impl.engine.DefaultProducerTemplate.sendBody(DefaultProducerTemplate.java:457)
评论:我什至找不到更远的出路,所以欢迎任何建议。
更新:
进一步调试后,我了解到错误在路由中。
from(direct:xyz)
.to(URL_A)
.transform()
...
.recipientList(exchangeProperty("event"))
更新 2:
我在 Camel Jira 版块中发布了 question/bug。
更新 3:
我添加一个我测试的例子class是的,测试的路由和上面的一样。
Spring启动路由的启动应用程序,上下文:
@SpringBootApplication
@PropertySource("classpath:application-test.properties")
class TestApp {
public static void main(String[] args) {
SpringApplication.run(TestApp.class, args);
}
}
自测:
@RunWith(SpringRunner.class)
@TestPropertySource(locations = "application-test.properties")
@SpringBootTest(classes = TestApp.class, webEnvironment = DEFINED_PORT)
public class FunctionalTest {
@Autowired
private EventConsumeCreator eventConsumerCreator;
private List<Endpoint> consumers;
private static final MockComponent MOCK_COMPONENT = new MockComponent();
@Before
public void before() {
// Setting Wiremock and LogAsserts
consumers = eventConsumerCreator.getConsumers();
consumers.clear();
consumers.add(new MockEndpoint("direct:xyz", MOCK_COMPONENT));
}
@Test
public checkNumEvents() {
// Make requests to endpoints
// Verify logs
// Check wiremock asserts
assertThat(numEvents(consumers), is(1));
}
}
用于创建消费者的实用程序 class:
@Component
public class EventConsumerCreator {
private List<Endpoint> consumers = new LinkedList<>();
private CamelContext camelContext;
@Autowired
public EventConsumerCreator(CamelContext camelContext) {
this.camelContext = camelContext;
}
public List<Endpoint> getConsumers() {
return consumers;
}
public Endpoint createConsumer(String identifier) {
Endpoint endpoint = createEndpoint(identifier);
consumers.add(endpoint);
return endpoint;
}
private Endpoint createEndpoint(String identifier) {
DirectComponent component = camelContext.getComponent("direct", DirectComponent.class);
try {
return component.createEndpoint("direct://" + identifier);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
感谢@Claus Ibsen 在 Jira 中的回复,我解决了这个问题。
解决方案是:
- 在
FunctionalTest
中添加@Autowired private CamelContext camelContext
- 在
@Before
中遍历所有端点并执行
camelContext.addEndpoint(endpoint.getEndpointUri(), endpoint);
endpoint.start();
- 在
@After
语句中,停止运行个端点
endpoint.stop();
camelContext.removeEndpoint(endpoint);
评论: 如果遇到这种情况,请考虑是否可以依赖 Spring/Camel 自动配置。如果没有,请尝试手动重新创建类似 Camel 的步骤。
我将 Camel 组件和代码从 2.X.X 升级到 3.7.3
此外,我在 Java 11 中重新编译了源代码,然后才在 Java 8 中工作。
路线示例:
from(direct:xyz)
.to(URL_A)
.transform()
...
问题出现是因为在 to
之后,我得到 null
。
我从 camel-http4
移动到 camel-http
,检查了库的属性,但仍然无法找出问题所在?
我得到的错误:
CaughtExceptionType: org.apache.camel.FailedToCreateProducerException CaughtExceptionMessage: Failed to create Producer for endpoint: direct:xyz1616073923650. Reason: java.lang.NullPointerException StackTrace: org.apache.camel.FailedToCreateProducerException: Failed to create Producer for endpoint: direct:xyz1616073923650. Reason: java.lang.NullPointerException
at org.apache.camel.support.cache.DefaultProducerCache.acquireProducer(DefaultProducerCache.java:154)
at org.apache.camel.processor.RecipientListProcessor.createProcessorExchangePairs(RecipientListProcessor.java:219)
at org.apache.camel.processor.MulticastProcessor.process(MulticastProcessor.java:276)
at org.apache.camel.processor.RecipientList.sendToRecipientList(RecipientList.java:222)
at org.apache.camel.processor.RecipientList.process(RecipientList.java:185)
at org.apache.camel.processor.Pipeline$PipelineTask.run(Pipeline.java:90)
at org.apache.camel.impl.engine.DefaultReactiveExecutor$Worker.schedule(DefaultReactiveExecutor.java:148)
at org.apache.camel.impl.engine.DefaultReactiveExecutor.scheduleMain(DefaultReactiveExecutor.java:60)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:147)
at org.apache.camel.impl.engine.CamelInternalProcessor.process(CamelInternalProcessor.java:312)
at org.apache.camel.component.direct.DirectProducer.process(DirectProducer.java:84)
at org.apache.camel.impl.engine.SharedCamelInternalProcessor.process(SharedCamelInternalProcessor.java:218)
at org.apache.camel.impl.engine.SharedCamelInternalProcessor.process(SharedCamelInternalProcessor.java:112)
at org.apache.camel.impl.engine.DefaultAsyncProcessorAwaitManager.process(DefaultAsyncProcessorAwaitManager.java:83)
at org.apache.camel.impl.engine.SharedCamelInternalProcessor.process(SharedCamelInternalProcessor.java:109)
at org.apache.camel.support.cache.DefaultProducerCache.send(DefaultProducerCache.java:189)
at org.apache.camel.impl.engine.DefaultProducerTemplate.send(DefaultProducerTemplate.java:176)
at org.apache.camel.impl.engine.DefaultProducerTemplate.send(DefaultProducerTemplate.java:172)
at org.apache.camel.impl.engine.DefaultProducerTemplate.send(DefaultProducerTemplate.java:153)
at org.apache.camel.impl.engine.DefaultProducerTemplate.sendBody(DefaultProducerTemplate.java:187)
at org.apache.camel.impl.engine.DefaultProducerTemplate.sendBody(DefaultProducerTemplate.java:457)
评论:我什至找不到更远的出路,所以欢迎任何建议。
更新:
进一步调试后,我了解到错误在路由中。
from(direct:xyz)
.to(URL_A)
.transform()
...
.recipientList(exchangeProperty("event"))
更新 2:
我在 Camel Jira 版块中发布了 question/bug。
更新 3:
我添加一个我测试的例子class是的,测试的路由和上面的一样。
Spring启动路由的启动应用程序,上下文:
@SpringBootApplication
@PropertySource("classpath:application-test.properties")
class TestApp {
public static void main(String[] args) {
SpringApplication.run(TestApp.class, args);
}
}
自测:
@RunWith(SpringRunner.class)
@TestPropertySource(locations = "application-test.properties")
@SpringBootTest(classes = TestApp.class, webEnvironment = DEFINED_PORT)
public class FunctionalTest {
@Autowired
private EventConsumeCreator eventConsumerCreator;
private List<Endpoint> consumers;
private static final MockComponent MOCK_COMPONENT = new MockComponent();
@Before
public void before() {
// Setting Wiremock and LogAsserts
consumers = eventConsumerCreator.getConsumers();
consumers.clear();
consumers.add(new MockEndpoint("direct:xyz", MOCK_COMPONENT));
}
@Test
public checkNumEvents() {
// Make requests to endpoints
// Verify logs
// Check wiremock asserts
assertThat(numEvents(consumers), is(1));
}
}
用于创建消费者的实用程序 class:
@Component
public class EventConsumerCreator {
private List<Endpoint> consumers = new LinkedList<>();
private CamelContext camelContext;
@Autowired
public EventConsumerCreator(CamelContext camelContext) {
this.camelContext = camelContext;
}
public List<Endpoint> getConsumers() {
return consumers;
}
public Endpoint createConsumer(String identifier) {
Endpoint endpoint = createEndpoint(identifier);
consumers.add(endpoint);
return endpoint;
}
private Endpoint createEndpoint(String identifier) {
DirectComponent component = camelContext.getComponent("direct", DirectComponent.class);
try {
return component.createEndpoint("direct://" + identifier);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
感谢@Claus Ibsen 在 Jira 中的回复,我解决了这个问题。
解决方案是:
- 在
FunctionalTest
中添加 - 在
@Before
中遍历所有端点并执行
@Autowired private CamelContext camelContext
camelContext.addEndpoint(endpoint.getEndpointUri(), endpoint);
endpoint.start();
- 在
@After
语句中,停止运行个端点
endpoint.stop();
camelContext.removeEndpoint(endpoint);
评论: 如果遇到这种情况,请考虑是否可以依赖 Spring/Camel 自动配置。如果没有,请尝试手动重新创建类似 Camel 的步骤。