INT-4203: Expression RH Advice Improvements
JIRA: https://jira.spring.io/browse/INT-4203 Add channel names for easier use in DSL. Add documentation (boot) example. Normalize Expression Setters; add Javadocs Polishing - SPR-15091 Tiny code style polishing
This commit is contained in:
Gary Russell
committed by
Artem Bilan
Artem Bilan
parent
e2dd2c52d2
commit
77fd8a4684
@@ -171,18 +171,18 @@ It also adds an `ExponentialBackoffPolicy` where the first retry waits 1 second,
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</int:service-activator>
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<bean id="retryTemplate" class="org.springframework.retry.support.RetryTemplate">
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<property name="retryPolicy">
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<bean class="org.springframework.retry.policy.SimpleRetryPolicy">
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<property name="maxAttempts" value="4" />
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</bean>
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</property>
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<property name="backOffPolicy">
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<bean class="org.springframework.retry.backoff.ExponentialBackOffPolicy">
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<property name="initialInterval" value="1000" />
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<property name="multiplier" value="5.0" />
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<property name="maxInterval" value="60000" />
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</bean>
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</property>
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<property name="retryPolicy">
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<bean class="org.springframework.retry.policy.SimpleRetryPolicy">
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<property name="maxAttempts" value="4" />
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</bean>
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</property>
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<property name="backOffPolicy">
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<bean class="org.springframework.retry.backoff.ExponentialBackOffPolicy">
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<property name="initialInterval" value="1000" />
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<property name="multiplier" value="5.0" />
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<property name="maxInterval" value="60000" />
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</bean>
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</property>
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</bean>
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27.058 DEBUG [task-scheduler-1]preSend on channel 'input', message: [Payload=...]
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@@ -214,7 +214,7 @@ Starting with _version 4.0_, the above configuration can be greatly simplified w
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</int:service-activator>
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<int:handler-retry-advice id="retrier" max-attempts="4" recovery-channel="myErrorChannel">
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<int:exponential-back-off initial="1000" multiplier="5.0" maximum="60000" />
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<int:exponential-back-off initial="1000" multiplier="5.0" maximum="60000" />
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</int:handler-retry-advice>
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----
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@@ -225,9 +225,9 @@ You can also define the advice directly within the chain:
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----
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<int:service-activator input-channel="input" ref="failer" method="service">
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<int:request-handler-advice-chain>
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<int:retry-advice id="retrier" max-attempts="4" recovery-channel="myErrorChannel">
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<int:exponential-back-off initial="1000" multiplier="5.0" maximum="60000" />
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</int:retry-advice>
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<int:retry-advice id="retrier" max-attempts="4" recovery-channel="myErrorChannel">
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<int:exponential-back-off initial="1000" multiplier="5.0" maximum="60000" />
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</int:retry-advice>
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</request-handler-advice-chain>
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</int:service-activator>
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----
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@@ -391,6 +391,57 @@ When an exception is thrown in the scope of the advice, by default, that excepti
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`failureExpression` is evaluated.
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If you wish to suppress throwing the exception, set the `trapException` property to `true`.
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.Example - Configuring the Advice with Java DSL
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[source, java]
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----
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@SpringBootApplication
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public class EerhaApplication {
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public static void main(String[] args) {
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ConfigurableApplicationContext context = SpringApplication.run(EerhaApplication.class, args);
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MessageChannel in = context.getBean("advised.input", MessageChannel.class);
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in.send(new GenericMessage<>("good"));
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in.send(new GenericMessage<>("bad"));
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context.close();
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}
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@Bean
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public IntegrationFlow advised() {
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return f -> f.handle((GenericHandler<String>) (payload, headers) -> {
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if (payload.equals("good")) {
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return null;
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}
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else {
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throw new RuntimeException("some failure");
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}
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}, c -> c.advice(expressionAdvice()));
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}
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@Bean
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public Advice expressionAdvice() {
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ExpressionEvaluatingRequestHandlerAdvice advice = new ExpressionEvaluatingRequestHandlerAdvice();
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advice.setSuccessChannelName("success.input");
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advice.setOnSuccessExpression("payload + ' was successful'");
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advice.setFailureChannelName("failure.input");
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advice.setOnFailureExpression(
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"payload + ' was bad, with reason: ' + #exception.cause.message");
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advice.setTrapException(true);
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return advice;
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}
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@Bean
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public IntegrationFlow success() {
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return f -> f.handle(System.out::println);
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}
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@Bean
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public IntegrationFlow failure() {
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return f -> f.handle(System.out::println);
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}
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}
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----
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[[custom-advice]]
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==== Custom Advice Classes
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@@ -586,7 +637,7 @@ public class MyAdvisedFilter {
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@Filter(inputChannel="input", outputChannel="output",
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adviceChain="adviceChain", discardWithinAdvice="false")
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public boolean filter(String s) {
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return s.contains("good");
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return s.contains("good");
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}
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}
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----
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@@ -665,16 +716,16 @@ For convenience, the `MetadataStoreSelector` options are configurable directly o
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[source,xml]
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----
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<idempotent-receiver
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id="" <1>
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endpoint="" <2>
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selector="" <3>
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discard-channel="" <4>
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metadata-store="" <5>
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key-strategy="" <6>
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key-expression="" <7>
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value-strategy="" <8>
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value-expression="" <9>
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throw-exception-on-rejection="" /> <10>
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id="" <1>
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endpoint="" <2>
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selector="" <3>
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discard-channel="" <4>
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metadata-store="" <5>
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key-strategy="" <6>
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key-expression="" <7>
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value-strategy="" <8>
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value-expression="" <9>
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throw-exception-on-rejection="" /> <10>
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----
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<1> The id of the `IdempotentReceiverInterceptor` bean.
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