Spring integration Spring集成:拆分器聚合器流中错误处理的意外行为
我考试不及格。问题是,为什么在拆分的“子消息”之一出现错误的情况下,回答仅为错误,而对另一个成功处理的子消息没有结果(如测试中所预期的)?是否对该代码进行了修改以达到测试中预期的结果Spring integration Spring集成:拆分器聚合器流中错误处理的意外行为,spring-integration,spring-integration-dsl,Spring Integration,Spring Integration Dsl,我考试不及格。问题是,为什么在拆分的“子消息”之一出现错误的情况下,回答仅为错误,而对另一个成功处理的子消息没有结果(如测试中所预期的)?是否对该代码进行了修改以达到测试中预期的结果 @RunWith(SpringRunner.class) public class ErrorHandlingTests { @Autowired StringsService stringsService; interface StringsService { @Non
@RunWith(SpringRunner.class)
public class ErrorHandlingTests {
@Autowired
StringsService stringsService;
interface StringsService {
@Nonnull
List<String> process(@Nonnull List<String> data);
}
@EnableIntegration
@Configuration
static class Config {
@Bean
IntegrationFlow errorHandler() {
return IntegrationFlows.from("errorChannel")
.<MessagingException>handle((ex, h) -> "Failure for " + ex.getFailedMessage().getPayload())
.get();
}
@Bean
IntegrationFlow errorsHandlingFlow2() {
AtomicInteger incomingCorrelationId = new AtomicInteger();
return IntegrationFlows.from(StringsService.class, gws -> gws.errorChannel("errorChannel"))
.split(new AbstractMessageSplitter() {
@Override
protected Object splitMessage(Message<?> message) {
List<String> strings = (List<String>) message.getPayload();
int id = incomingCorrelationId.get();
return strings
.stream()
.map(r -> MessageBuilder
.withPayload(r)
.setHeader(IntegrationMessageHeaderAccessor.CORRELATION_ID, id)
.setHeader(IntegrationMessageHeaderAccessor.SEQUENCE_SIZE, strings.size())
.build())
.collect(Collectors.toList());
}
})
.transform(new AbstractPayloadTransformer<String, String>() {
@Override
protected String transformPayload(String s) {
if (s.contains("oops"))
throw new IllegalArgumentException("Bad value");
return "R: " + s;
}
})
.aggregate(a -> a.outputProcessor(new AbstractAggregatingMessageGroupProcessor() {
@Override
protected Object aggregatePayloads(MessageGroup group, Map<String, Object> defaultHeaders) {
return group.getMessages()
.stream()
.map(m -> (String) m.getPayload())
.collect(Collectors.toList());
}
}))
.get();
}
}
@Test
public void testErrorHandlingInFlow2() {
assertEquals(Arrays.asList("R: a", "R: b"), stringsService.process(Arrays.asList("a", "b")));
assertEquals(Arrays.asList("R: a", "Failure for oops"), stringsService.process(Arrays.asList("a", "oops")));
}
}
@RunWith(SpringRunner.class)
公共类错误处理测试{
@自动连线
Strings服务Strings服务;
接口StringsService{
@非空
列表进程(@非空列表数据);
}
@使能集成
@配置
静态类配置{
@豆子
IntegrationFlow errorHandler(){
返回IntegrationFlows.from(“errorChannel”)
.handle((ex,h)->“+ex.getFailedMessage().getPayload()的失败)
.get();
}
@豆子
集成流错误ShandlingFlow2(){
AtomicInteger incomingCorrelationId=新的AtomicInteger();
返回IntegrationFlows.from(StringsService.class,gws->gws.errorChannel(“errorChannel”))
.split(新的AbstractMessageSplitter(){
@凌驾
受保护对象拆分消息(消息消息){
List strings=(List)message.getPayload();
int id=incomingCorrelationId.get();
返回字符串
.stream()
.map(r->MessageBuilder
.有效载荷(r)
.setHeader(IntegrationMessageHeaderAccessor.CORRELATION_ID,ID)
.setHeader(IntegrationMessageHeaderAccessor.SEQUENCE_SIZE,strings.SIZE())
.build())
.collect(Collectors.toList());
}
})
.transform(新的AbstractPayloadTransformer(){
@凌驾
受保护的字符串有效负载(字符串s){
如果(s.contains(“oops”))
抛出新的IllegalArgumentException(“坏值”);
返回“R:+s;
}
})
.aggregate(a->a.outputProcessor(新的AbstractAggregatingMessageGroupProcessor()){
@凌驾
受保护对象aggregatePayloads(MessageGroup、Map defaultHeaders){
返回组。getMessages()
.stream()
.map(m->(字符串)m.getPayload())
.collect(Collectors.toList());
}
}))
.get();
}
}
@试验
public void testerRorrHandlingFlow2(){
assertEquals(Arrays.asList(“R:a”、“R:b”)、stringsService.process(Arrays.asList(“a”、“b”));
assertEquals(Arrays.asList(“R:a”,“oops失败”)、stringsService.process(Arrays.asList(“a”,“oops”));
}
}
更新版本,正在使用,并附有应用建议
@RunWith(SpringRunner.class)
public class ErrorHandlingTests2 {
interface StringsService {
@Nonnull
List<String> process(@Nonnull List<String> data);
}
@Autowired
StringsService stringsService;
@EnableIntegration
@Configuration
static class Config {
@Bean
IntegrationFlow errorHandler() {
return IntegrationFlows.from("errorChannel")
.<MessagingException>handle((ex, h) -> "Failure for " + ex.getFailedMessage().getPayload())
.get();
}
@Bean
IntegrationFlow errorsHandlingFlow2() {
return IntegrationFlows.from(StringsService.class, gws -> gws.errorChannel("errorChannel"))
.split(new AbstractMessageSplitter() {
@Override
protected Object splitMessage(Message<?> message) {
List<String> strings = (List<String>) message.getPayload();
return strings
.stream()
.map(r -> MessageBuilder
.withPayload(r)
.build())
.collect(Collectors.toList());
}
})
.transform(new AbstractPayloadTransformer<String, String>() {
@Override
protected String transformPayload(String s) {
if (s.contains("oops"))
throw new IllegalArgumentException("Bad value");
return "R: " + s;
}
}, c -> c.advice(advice()))
.aggregate(a -> a.outputProcessor(new AbstractAggregatingMessageGroupProcessor() {
@Override
protected Object aggregatePayloads(MessageGroup group, Map<String, Object> defaultHeaders) {
return group.getMessages()
.stream()
.map(m -> (String) m.getPayload())
.collect(Collectors.toList());
}
}))
.get();
}
@Bean
ExpressionEvaluatingRequestHandlerAdvice advice() {
ExpressionEvaluatingRequestHandlerAdvice advice = new ExpressionEvaluatingRequestHandlerAdvice();
advice.setReturnFailureExpressionResult(true);
advice.setOnFailureExpression(
new FunctionExpression<Message<?>>(s ->
MessageBuilder
.withPayload("Failure for " + s.getPayload())
.copyHeaders(s.getHeaders()).build())
);
return advice;
}
}
@Test
public void testErrorHandlingInFlow2() {
assertEquals(Arrays.asList("R: a", "R: b"), stringsService.process(Arrays.asList("a", "b")));
assertEquals(Arrays.asList("R: a", "Failure for oops", "R: b"), stringsService.process(Arrays.asList("a", "oops", "b")));
}
}
@RunWith(SpringRunner.class)
公共类ErrorHandlingTests2{
接口StringsService{
@非空
列表进程(@非空列表数据);
}
@自动连线
Strings服务Strings服务;
@使能集成
@配置
静态类配置{
@豆子
IntegrationFlow errorHandler(){
返回IntegrationFlows.from(“errorChannel”)
.handle((ex,h)->“+ex.getFailedMessage().getPayload()的失败)
.get();
}
@豆子
集成流错误ShandlingFlow2(){
返回IntegrationFlows.from(StringsService.class,gws->gws.errorChannel(“errorChannel”))
.split(新的AbstractMessageSplitter(){
@凌驾
受保护对象拆分消息(消息消息){
List strings=(List)message.getPayload();
返回字符串
.stream()
.map(r->MessageBuilder
.有效载荷(r)
.build())
.collect(Collectors.toList());
}
})
.transform(新的AbstractPayloadTransformer(){
@凌驾
受保护的字符串有效负载(字符串s){
如果(s.contains(“oops”))
抛出新的IllegalArgumentException(“坏值”);
返回“R:+s;
}
},c->c.advice(advice())
.aggregate(a->a.outputProcessor(新的AbstractAggregatingMessageGroupProcessor()){
@凌驾
受保护对象aggregatePayloads(MessageGroup、Map defaultHeaders){
返回组。getMessages()
.stream()
.map(m->(字符串)m.getPayload())
.collect(Collectors.toList());
}
}))
.get();
}
@豆子
ExpressionEvaluationRequestHandlerAdvice通知(){
ExpressionEvaluationRequestHandlerAdvice通知=新的ExpressionEvaluationRequestHandlerAdvice();
advice.setReturnFailureExpressionResult(true);
advice.setOnFailureExpression(
新函数