spring OnCloudPlatformCondition 源码
springboot OnCloudPlatformCondition 代码
文件路径：/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/condition/OnCloudPlatformCondition.java
/*
* Copyright 2012-2019 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.boot.autoconfigure.condition;
import java.util.Map;
import org.springframework.boot.cloud.CloudPlatform;
import org.springframework.context.annotation.Condition;
import org.springframework.context.annotation.ConditionContext;
import org.springframework.core.env.Environment;
import org.springframework.core.type.AnnotatedTypeMetadata;
/**
* {@link Condition} that checks for a required {@link CloudPlatform}.
*
* @author Madhura Bhave
* @see ConditionalOnCloudPlatform
*/
class OnCloudPlatformCondition extends SpringBootCondition {
@Override
public ConditionOutcome getMatchOutcome(ConditionContext context, AnnotatedTypeMetadata metadata) {
Map<String, Object> attributes = metadata.getAnnotationAttributes(ConditionalOnCloudPlatform.class.getName());
CloudPlatform cloudPlatform = (CloudPlatform) attributes.get("value");
return getMatchOutcome(context.getEnvironment(), cloudPlatform);
}
private ConditionOutcome getMatchOutcome(Environment environment, CloudPlatform cloudPlatform) {
String name = cloudPlatform.name();
ConditionMessage.Builder message = ConditionMessage.forCondition(ConditionalOnCloudPlatform.class);
if (cloudPlatform.isActive(environment)) {
return ConditionOutcome.match(message.foundExactly(name));
}
return ConditionOutcome.noMatch(message.didNotFind(name).atAll());
}
}
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- 本文标签： Java Spring Spring Boot
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