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Fix priority semantic 

Commit 5fe8f52 introduced a support for @Priority as an alternative to
@Primary but it broke the semantic of the priority value. This commit
fixes this inconsistency.

As for @Order, the lowest value means the highest priority so if
several beans are candidates for injection, the one having the lowest
value will be used.

Issue: SPR-10548
This commit is contained in:
Stephane Nicoll 2014-07-08 10:26:03 +02:00
parent ea16ce0aa0
commit b78b2e9a03
2 changed files with 8 additions and 6 deletions
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6
spring-beans/src/main/java/org/springframework/beans/factory/support/DefaultListableBeanFactory.java
View File

@ -1136,7 +1136,9 @@ public class DefaultListableBeanFactory extends AbstractAutowireCapableBeanFacto
} }
/** /**
* Determine the candidate with the highest priority in the given set of beans. * Determine the candidate with the highest priority in the given set of beans. As
* defined by the {@link org.springframework.core.Ordered} interface, the lowest
* value has the highest priority.
* @param candidateBeans a Map of candidate names and candidate instances * @param candidateBeans a Map of candidate names and candidate instances
* that match the required type * that match the required type
* @param requiredType the target dependency type to match against * @param requiredType the target dependency type to match against
@ -1158,7 +1160,7 @@ public class DefaultListableBeanFactory extends AbstractAutowireCapableBeanFacto
"Multiple beans found with the same priority ('" + highestPriority + "') " + "Multiple beans found with the same priority ('" + highestPriority + "') " +
"among candidates: " + candidateBeans.keySet()); "among candidates: " + candidateBeans.keySet());
} }
else if (candidatePriority > highestPriority) { else if (candidatePriority < highestPriority) {
highestPriorityBeanName = candidateBeanName; highestPriorityBeanName = candidateBeanName;
highestPriority = candidatePriority; highestPriority = candidatePriority;
} }

8
spring-beans/src/test/java/org/springframework/beans/factory/DefaultListableBeanFactoryTests.java
View File

@ -1399,7 +1399,7 @@ public class DefaultListableBeanFactoryTests {
lbf.registerBeanDefinition("bd2", bd2); lbf.registerBeanDefinition("bd2", bd2);
thrown.expect(NoUniqueBeanDefinitionException.class); thrown.expect(NoUniqueBeanDefinitionException.class);
thrown.expectMessage(containsString("Multiple beans found with the same priority")); thrown.expectMessage(containsString("Multiple beans found with the same priority"));
thrown.expectMessage(containsString("500")); // conflicting priority thrown.expectMessage(containsString("5")); // conflicting priority
lbf.getBean(TestBean.class); lbf.getBean(TestBean.class);
} }
@ -1613,7 +1613,7 @@ public class DefaultListableBeanFactoryTests {
// expected // expected
assertNotNull("Exception should have cause", ex.getCause()); assertNotNull("Exception should have cause", ex.getCause());
assertEquals("Wrong cause type", NoUniqueBeanDefinitionException.class, ex.getCause().getClass()); assertEquals("Wrong cause type", NoUniqueBeanDefinitionException.class, ex.getCause().getClass());
assertTrue(ex.getMessage().contains("500")); // conflicting priority assertTrue(ex.getMessage().contains("5")); // conflicting priority
} }
} }
@ -2887,10 +2887,10 @@ public class DefaultListableBeanFactoryTests {
} }
@Priority(500) @Priority(5)
private static class HighPriorityTestBean extends TestBean {} private static class HighPriorityTestBean extends TestBean {}
@Priority(5) @Priority(500)
private static class LowPriorityTestBean extends TestBean {} private static class LowPriorityTestBean extends TestBean {}