How to Register a Spring Bean Only When Multiple Properties Are True

Environment: Spring Boot 2.3.10

Requirement: a bean should be registered only when multiple conditions are satisfied.

Method 1: @ConditionalOnExpression

Annotation description:

<code>@Retention(RetentionPolicy.RUNTIME)
@Target({ ElementType.TYPE, ElementType.METHOD })
@Documented
@Conditional(OnExpressionCondition.class)
public @interface ConditionalOnExpression {
    /**
     * The SpEL expression to evaluate. Expression should return {@code true} if the
     * condition passes or {@code false} if it fails.
     * @return the SpEL expression
     */
    String value() default "true";
}
</code>

The SpEL expression must return true or false. Use the built‑in @ConditionalOnExpression to control bean registration.

<code>@Bean
@ConditionalOnExpression("${pack.datasource.enabled:true} and ${pack.cache.enabled:true}")
public Animal animal() {
    return new Animal();
}
</code>

Only when both

pack.datasource.enabled

and

pack.cache.enabled

are true will the Animal bean be created.

Method 2: AllNestedConditions & AnyNestedCondition

AllNestedConditions registers the bean only when all nested conditions are met.

<code>public class DataSourceAllCondition extends AllNestedConditions {
    public DataSourceAllCondition() {
        super(ConfigurationPhase.REGISTER_BEAN);
    }
    public DataSourceAllCondition(ConfigurationPhase configurationPhase) {
        super(configurationPhase);
    }
    @ConditionalOnBean(UsersController.class)
    static class ExistClass { }

    @ConditionalOnProperty(prefix = "pack.datasource", name = "enabled", havingValue = "true", matchIfMissing = false)
    static class PropertyEnabled { }

    @ConditionalOnProperty(prefix = "pack.cache", name = "enabled", havingValue = "true", matchIfMissing = false)
    static class PropertyEnabled { }
}
</code>

<code>@Bean
@Conditional(DataSourceAnyCondition.class)
public Animal animal() {
    return new Animal();
}
</code>

In this example three conditions must be satisfied (UsersController bean present,

pack.datasource.enabled=true

,

pack.cache.enabled=true

) for the bean to be registered.

AnyNestedCondition registers the bean when any one of the nested conditions is true.

<code>public class DataSourceAnyCondition extends AnyNestedCondition {
    public DataSourceAnyCondition() {
        super(ConfigurationPhase.REGISTER_BEAN);
    }
    public DataSourceAnyCondition(ConfigurationPhase configurationPhase) {
        super(configurationPhase);
    }
    @ConditionalOnProperty(prefix = "pack.datasource", name = "enabled", havingValue = "true", matchIfMissing = false)
    static class PropertyEnabled { }

    @ConditionalOnProperty(prefix = "pack.cache", name = "enabled", havingValue = "true", matchIfMissing = false)
    static class PropertyEnabled { }
}
</code>

Only one of the two property conditions needs to be true for the bean to be created.