Java Binder类代码示例

import org.springframework.cloud.stream.binder.Binder; //导入依赖的package包/类
@Test
public void testParentConnectionFactoryInheritedByDefault() {
	context = SpringApplication.run(SimpleProcessor.class, "--server.port=0");
	BinderFactory<?> binderFactory = context.getBean(BinderFactory.class);
	Binder binder = binderFactory.getBinder(null);
	assertThat(binder, instanceOf(RedisMessageChannelBinder.class));
	DirectFieldAccessor binderFieldAccessor = new DirectFieldAccessor(binder);
	RedisConnectionFactory binderConnectionFactory =
			(RedisConnectionFactory) binderFieldAccessor.getPropertyValue("connectionFactory");
	assertThat(binderConnectionFactory, instanceOf(RedisConnectionFactory.class));
	RedisConnectionFactory connectionFactory = context.getBean(RedisConnectionFactory.class);
	assertThat(binderConnectionFactory, is(connectionFactory));
	CompositeHealthIndicator bindersHealthIndicator =
			context.getBean("bindersHealthIndicator", CompositeHealthIndicator.class);
	assertNotNull(bindersHealthIndicator);
	DirectFieldAccessor directFieldAccessor = new DirectFieldAccessor(bindersHealthIndicator);
	@SuppressWarnings("unchecked")
	Map<String,HealthIndicator> healthIndicators =
			(Map<String, HealthIndicator>) directFieldAccessor.getPropertyValue("indicators");
	assertThat(healthIndicators, hasKey("redis"));
	assertThat(healthIndicators.get("redis").health().getStatus(), equalTo(Status.UP));
}
 

import org.springframework.cloud.stream.binder.Binder; //导入依赖的package包/类
@Test
public void testParentConnectionFactoryInheritedIfOverridden() {
	context = new SpringApplication(SimpleProcessor.class, ConnectionFactoryConfiguration.class).run("--server.port=0");
	BinderFactory<?> binderFactory = context.getBean(BinderFactory.class);
	Binder binder = binderFactory.getBinder(null);
	assertThat(binder, instanceOf(RedisMessageChannelBinder.class));
	DirectFieldAccessor binderFieldAccessor = new DirectFieldAccessor(binder);
	RedisConnectionFactory binderConnectionFactory =
			(RedisConnectionFactory) binderFieldAccessor.getPropertyValue("connectionFactory");
	assertThat(binderConnectionFactory, is(MOCK_CONNECTION_FACTORY));
	RedisConnectionFactory connectionFactory = context.getBean(RedisConnectionFactory.class);
	assertThat(binderConnectionFactory, is(connectionFactory));
	CompositeHealthIndicator bindersHealthIndicator =
			context.getBean("bindersHealthIndicator", CompositeHealthIndicator.class);
	assertNotNull(bindersHealthIndicator);
	DirectFieldAccessor directFieldAccessor = new DirectFieldAccessor(bindersHealthIndicator);
	@SuppressWarnings("unchecked")
	Map<String,HealthIndicator> healthIndicators =
			(Map<String, HealthIndicator>) directFieldAccessor.getPropertyValue("indicators");
	assertThat(healthIndicators, hasKey("redis"));
	assertThat(healthIndicators.get("redis").health().getStatus(), equalTo(Status.UP));
}
 

import org.springframework.cloud.stream.binder.Binder; //导入依赖的package包/类
@Test
@SuppressWarnings("unchecked")
public void testAutoConfigureTopicsDisabledSucceedsIfTopicExisting() throws Throwable {
	KafkaBinderConfigurationProperties configurationProperties = createConfigurationProperties();

	String testTopicName = "existing" + System.currentTimeMillis();
	invokeCreateTopic(testTopicName, 5, 1);
	configurationProperties.setAutoCreateTopics(false);
	Binder binder = getBinder(configurationProperties);

	ExtendedConsumerProperties<KafkaConsumerProperties> consumerProperties = createConsumerProperties();

	DirectChannel input = createBindableChannel("input", createConsumerBindingProperties(consumerProperties));
	Binding<MessageChannel> binding = binder.bindConsumer(testTopicName, "test", input, consumerProperties);
	binding.unbind();
}
 

import org.springframework.cloud.stream.binder.Binder; //导入依赖的package包/类
@Test
@SuppressWarnings("unchecked")
public void testPartitionCountIncreasedIfAutoAddPartitionsSet() throws Throwable {
	KafkaBinderConfigurationProperties configurationProperties = createConfigurationProperties();

	String testTopicName = "existing" + System.currentTimeMillis();
	configurationProperties.setMinPartitionCount(6);
	configurationProperties.setAutoAddPartitions(true);
	Binder binder = getBinder(configurationProperties);
	ExtendedConsumerProperties<KafkaConsumerProperties> consumerProperties = createConsumerProperties();
	DirectChannel input = createBindableChannel("input", createConsumerBindingProperties(consumerProperties));

	Binding<?> binding = binder.bindConsumer(testTopicName, "test", input, consumerProperties);
	binding.unbind();
	assertThat(invokePartitionSize(testTopicName)).isEqualTo(6);
}
 

import org.springframework.cloud.stream.binder.Binder; //导入依赖的package包/类
@Test
@SuppressWarnings("unchecked")
public void testAutoAddPartitionsDisabledSucceedsIfTopicUnderPartitionedAndAutoRebalanceEnabled() throws Throwable {
	KafkaBinderConfigurationProperties configurationProperties = createConfigurationProperties();

	String testTopicName = "existing" + System.currentTimeMillis();
	invokeCreateTopic(testTopicName, 1, 1);
	configurationProperties.setAutoAddPartitions(false);
	Binder binder = getBinder(configurationProperties);
	GenericApplicationContext context = new GenericApplicationContext();
	context.refresh();

	ExtendedConsumerProperties<KafkaConsumerProperties> consumerProperties = createConsumerProperties();

	DirectChannel input = createBindableChannel("input", createConsumerBindingProperties(consumerProperties));

	// this consumer must consume from partition 2
	consumerProperties.setInstanceCount(3);
	consumerProperties.setInstanceIndex(2);
	Binding binding = binder.bindConsumer(testTopicName, "test", input, consumerProperties);
	binding.unbind();
	assertThat(invokePartitionSize(testTopicName)).isEqualTo(1);
}
 

import org.springframework.cloud.stream.binder.Binder; //导入依赖的package包/类
@Test
@SuppressWarnings("unchecked")
public void testAutoAddPartitionsDisabledFailsIfTopicUnderPartitionedAndAutoRebalanceDisabled() throws Throwable {
	KafkaBinderConfigurationProperties configurationProperties = createConfigurationProperties();

	String testTopicName = "existing" + System.currentTimeMillis();
	invokeCreateTopic(testTopicName, 1, 1);
	configurationProperties.setAutoAddPartitions(false);
	Binder binder = getBinder(configurationProperties);
	GenericApplicationContext context = new GenericApplicationContext();
	context.refresh();

	ExtendedConsumerProperties<KafkaConsumerProperties> consumerProperties = createConsumerProperties();
	DirectChannel output = createBindableChannel("output", createConsumerBindingProperties(consumerProperties));
	// this consumer must consume from partition 2
	consumerProperties.setInstanceCount(3);
	consumerProperties.setInstanceIndex(2);
	consumerProperties.getExtension().setAutoRebalanceEnabled(false);
	expectedProvisioningException.expect(ProvisioningException.class);
	expectedProvisioningException
			.expectMessage("The number of expected partitions was: 3, but 1 has been found instead");
	Binding binding = binder.bindConsumer(testTopicName, "test", output, consumerProperties);
	if (binding != null) {
		binding.unbind();
	}
}
 

import org.springframework.cloud.stream.binder.Binder; //导入依赖的package包/类
@Test
@SuppressWarnings("unchecked")
public void testPartitionCountNotReduced() throws Throwable {
	String testTopicName = "existing" + System.currentTimeMillis();

	KafkaBinderConfigurationProperties configurationProperties = createConfigurationProperties();

	invokeCreateTopic(testTopicName, 6, 1);
	configurationProperties.setAutoAddPartitions(true);
	Binder binder = getBinder(configurationProperties);
	GenericApplicationContext context = new GenericApplicationContext();
	context.refresh();

	ExtendedConsumerProperties<KafkaConsumerProperties> consumerProperties = createConsumerProperties();
	DirectChannel input = createBindableChannel("input", createConsumerBindingProperties(consumerProperties));

	Binding<?> binding = binder.bindConsumer(testTopicName, "test", input, consumerProperties);
	binding.unbind();

	assertThat(partitionSize(testTopicName)).isEqualTo(6);
}
 

import org.springframework.cloud.stream.binder.Binder; //导入依赖的package包/类
@Test
@SuppressWarnings("unchecked")
public void testConsumerDefaultDeserializer() throws Throwable {
	Binding<?> binding = null;
	try {
		KafkaBinderConfigurationProperties configurationProperties = createConfigurationProperties();
		String testTopicName = "existing" + System.currentTimeMillis();
		invokeCreateTopic(testTopicName, 5, 1);
		configurationProperties.setAutoCreateTopics(false);
		Binder binder = getBinder(configurationProperties);

		ExtendedConsumerProperties<KafkaConsumerProperties> consumerProperties = createConsumerProperties();
		DirectChannel input = createBindableChannel("input", createConsumerBindingProperties(consumerProperties));

		binding = binder.bindConsumer(testTopicName, "test", input, consumerProperties);
		DirectFieldAccessor consumerAccessor = new DirectFieldAccessor(getKafkaConsumer(binding));
		assertTrue(consumerAccessor.getPropertyValue("keyDeserializer") instanceof ByteArrayDeserializer);
		assertTrue(consumerAccessor.getPropertyValue("valueDeserializer") instanceof ByteArrayDeserializer);
	}
	finally {
		if (binding != null) {
			binding.unbind();
		}
	}
}
 

import org.springframework.cloud.stream.binder.Binder; //导入依赖的package包/类
@Test
public void contextLoads() {
	Binder<MessageChannel, ?, ?> binder1 = binderFactory.getBinder("kafka1", MessageChannel.class);
	KafkaMessageChannelBinder kafka1 = (KafkaMessageChannelBinder) binder1;
	DirectFieldAccessor directFieldAccessor1 = new DirectFieldAccessor(kafka1);
	KafkaBinderConfigurationProperties configuration1 =
			(KafkaBinderConfigurationProperties) directFieldAccessor1.getPropertyValue("configurationProperties");
	Assert.assertThat(configuration1.getBrokers(), arrayWithSize(1));
	Assert.assertThat(configuration1.getBrokers()[0], equalTo(kafkaTestSupport1.getBrokersAsString()));

	Binder<MessageChannel, ?, ?> binder2 = binderFactory.getBinder("kafka2", MessageChannel.class);
	KafkaMessageChannelBinder kafka2 = (KafkaMessageChannelBinder) binder2;
	DirectFieldAccessor directFieldAccessor2 = new DirectFieldAccessor(kafka2);
	KafkaBinderConfigurationProperties configuration2 =
			(KafkaBinderConfigurationProperties) directFieldAccessor2.getPropertyValue("configurationProperties");
	Assert.assertThat(configuration2.getBrokers(), arrayWithSize(1));
	Assert.assertThat(configuration2.getBrokers()[0], equalTo(kafkaTestSupport2.getBrokersAsString()));
}
 

import org.springframework.cloud.stream.binder.Binder; //导入依赖的package包/类
@Test
public void testParentConnectionFactoryInheritedIfOverridden() {
	context = new SpringApplicationBuilder(SimpleProcessor.class, ConnectionFactoryConfiguration.class)
			.web(WebApplicationType.NONE)
			.run("--server.port=0");
	BinderFactory binderFactory = context.getBean(BinderFactory.class);
	Binder<?, ?, ?> binder = binderFactory.getBinder(null, MessageChannel.class);
	assertThat(binder).isInstanceOf(RabbitMessageChannelBinder.class);
	DirectFieldAccessor binderFieldAccessor = new DirectFieldAccessor(binder);
	ConnectionFactory binderConnectionFactory = (ConnectionFactory) binderFieldAccessor
			.getPropertyValue("connectionFactory");
	assertThat(binderConnectionFactory).isSameAs(MOCK_CONNECTION_FACTORY);
	ConnectionFactory connectionFactory = context.getBean(ConnectionFactory.class);
	assertThat(binderConnectionFactory).isSameAs(connectionFactory);
	CompositeHealthIndicator bindersHealthIndicator = context.getBean("bindersHealthIndicator",
			CompositeHealthIndicator.class);
	assertThat(bindersHealthIndicator).isNotNull();
	DirectFieldAccessor directFieldAccessor = new DirectFieldAccessor(bindersHealthIndicator);
	@SuppressWarnings("unchecked")
	Map<String, HealthIndicator> healthIndicators = (Map<String, HealthIndicator>) directFieldAccessor
			.getPropertyValue("indicators");
	assertThat(healthIndicators).containsKey("rabbit");
	// mock connection factory behaves as if down
	assertThat(healthIndicators.get("rabbit").health().getStatus()).isEqualTo(Status.DOWN);
}
 

import org.springframework.cloud.stream.binder.Binder; //导入依赖的package包/类
/**
 * Return the generic type of PollableSource to determine if it is appropriate
 * for the binder.
 * e.g., with PollableMessageSource extends PollableSource<MessageHandler>
 * and  AbstractMessageChannelBinder
 *             implements PollableConsumerBinder<MessageHandler, C>
 * We're checking that the the generic type (MessageHandler) matches.
 *
 * @param binderInstance the binder.
 * @param bindingTargetType the binding target type.
 * @return
 */
@SuppressWarnings("rawtypes")
public static boolean checkCompatiblePollableBinder(Binder binderInstance, Class<?> bindingTargetType) {
	Class<?>[] binderInterfaces = ClassUtils.getAllInterfaces(binderInstance);
	for (Class<?> intf : binderInterfaces) {
		if (PollableConsumerBinder.class.isAssignableFrom(intf)) {
			Class<?>[] targetInterfaces = ClassUtils.getAllInterfacesForClass(bindingTargetType);
			Class<?> psType = findPollableSourceType(targetInterfaces);
			if (psType != null) {
				return getParameterType(binderInstance.getClass(), intf, 0)
						.isAssignableFrom(psType);
			}
		}
	}
	return false;
}
 

import org.springframework.cloud.stream.binder.Binder; //导入依赖的package包/类
public <T> Binding<T> doBindConsumer(T input, String inputName, Binder<T, ConsumerProperties, ?> binder,
		ConsumerProperties consumerProperties, String target) {
	if (this.taskScheduler == null || this.bindingServiceProperties.getBindingRetryInterval() <= 0) {
		return binder.bindConsumer(target,
				this.bindingServiceProperties.getGroup(inputName), input,
				consumerProperties);
	}
	else {
		try {
			return binder.bindConsumer(target,
					this.bindingServiceProperties.getGroup(inputName), input,
					consumerProperties);
		}
		catch (RuntimeException e) {
			LateBinding<T> late = new LateBinding<T>();
			rescheduleConsumerBinding(input, inputName, binder, consumerProperties, target, late, e);
			return late;
		}
	}
}
 

import org.springframework.cloud.stream.binder.Binder; //导入依赖的package包/类
public <T> void rescheduleConsumerBinding(final T input, final String inputName,
		final Binder<T, ConsumerProperties, ?> binder, final ConsumerProperties consumerProperties,
		final String target, final LateBinding<T> late, RuntimeException exception) {
	assertNotIllegalException(exception);
	this.log.error("Failed to create consumer binding; retrying in " +
		this.bindingServiceProperties.getBindingRetryInterval() + " seconds", exception);
	this.scheduleTask(() -> {
		try {
			late.setDelegate(binder.bindConsumer(target,
					this.bindingServiceProperties.getGroup(inputName), input, consumerProperties));
		}
		catch (RuntimeException e) {
			rescheduleConsumerBinding(input, inputName, binder, consumerProperties, target, late, e);
		}
	});
}
 

import org.springframework.cloud.stream.binder.Binder; //导入依赖的package包/类
@SuppressWarnings({ "rawtypes", "unchecked" })
public <T> Binding<T> doBindPollableConsumer(T input, String inputName, Binder<T, ConsumerProperties, ?> binder,
		ConsumerProperties consumerProperties, String target) {
	if (this.taskScheduler == null || this.bindingServiceProperties.getBindingRetryInterval() <= 0) {
		return ((PollableConsumerBinder) binder).bindPollableConsumer(target,
				this.bindingServiceProperties.getGroup(inputName), (PollableSource) input,
				consumerProperties);
	}
	else {
		try {
			return ((PollableConsumerBinder) binder).bindPollableConsumer(target,
					this.bindingServiceProperties.getGroup(inputName), (PollableSource) input,
					consumerProperties);
		}
		catch (RuntimeException e) {
			LateBinding<T> late = new LateBinding<T>();
			reschedulePollableConsumerBinding(input, inputName, binder, consumerProperties, target, late, e);
			return late;
		}
	}
}
 

import org.springframework.cloud.stream.binder.Binder; //导入依赖的package包/类
@SuppressWarnings({ "rawtypes", "unchecked" })
public <T> void reschedulePollableConsumerBinding(final T input, final String inputName,
		final Binder<T, ConsumerProperties, ?> binder, final ConsumerProperties consumerProperties,
		final String target, final LateBinding<T> late, RuntimeException exception) {
	assertNotIllegalException(exception);
	this.log.error("Failed to create consumer binding; retrying in " +
		this.bindingServiceProperties.getBindingRetryInterval() + " seconds", exception);
	this.scheduleTask(() -> {
		try {
			late.setDelegate(((PollableConsumerBinder) binder).bindPollableConsumer(target,
					this.bindingServiceProperties.getGroup(inputName), (PollableSource) input,
					consumerProperties));
		}
		catch (RuntimeException e) {
			reschedulePollableConsumerBinding(input, inputName, binder, consumerProperties, target, late, e);
		}
	});
}