In spring boot application, I define some config properties in yaml file as below.
my.app.maxAttempts = 10
my.app.backOffDelay = 500L
And an example bean
@ConfigurationProperties(prefix = "my.app")
public class ConfigProperties {
private int maxAttempts;
private long backOffDelay;
public int getMaxAttempts() {
return maxAttempts;
}
public void setMaxAttempts(int maxAttempts) {
this.maxAttempts = maxAttempts;
}
public void setBackOffDelay(long backOffDelay) {
this.backOffDelay = backOffDelay;
}
public long getBackOffDelay() {
return backOffDelay;
}
How can I inject the values of my.app.maxAttempts and my.app.backOffdelay to Spring Retry annotation? In the example below, I want to replace the value 10 of maxAttempts and 500Lof backoff value with the corresponding references of config properties.
@Retryable(maxAttempts=10, include=TimeoutException.class, backoff=@Backoff(value = 500L))
Staring from spring-retry-1.2.0 we can use configurable properties in @Retryable annotation.
Use "maxAttemptsExpression", Refer the below code for usage,
@Retryable(maxAttemptsExpression = "#{${my.app.maxAttempts}}",
backoff = @Backoff(delayExpression = "#{${my.app. backOffDelay}}"))
It will not work if you use any version less than 1.2.0.Also you don't require any configurable property classes.
You can also use existing beans in expression attributes.
@Retryable(include = RuntimeException.class,
maxAttemptsExpression = "#{@retryProperties.getMaxAttempts()}",
backoff = @Backoff(delayExpression = "#{@retryProperties.getBackOffInitialInterval()}",
maxDelayExpression = "#{@retryProperties.getBackOffMaxInterval" + "()}",
multiplierExpression = "#{@retryProperties.getBackOffIntervalMultiplier()}"))
String perform();
@Recover
String recover(RuntimeException exception);
where
retryProperties
is your bean which holds retry related properties as in your case.
You can use Spring EL as shown below to load the properties:
@Retryable(maxAttempts="${my.app.maxAttempts}",
include=TimeoutException.class,
backoff=@Backoff(value ="${my.app.backOffDelay}"))