spring DiscoveredOperationsFactory 源码

  • 2022-08-12
  • 浏览 (542)

springboot DiscoveredOperationsFactory 代码

文件路径:/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/annotation/DiscoveredOperationsFactory.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.actuate.endpoint.annotation;

import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.Collection;
import java.util.Collections;
import java.util.EnumMap;
import java.util.Map;
import java.util.Objects;

import org.springframework.boot.actuate.endpoint.EndpointId;
import org.springframework.boot.actuate.endpoint.Operation;
import org.springframework.boot.actuate.endpoint.OperationType;
import org.springframework.boot.actuate.endpoint.invoke.OperationInvoker;
import org.springframework.boot.actuate.endpoint.invoke.OperationInvokerAdvisor;
import org.springframework.boot.actuate.endpoint.invoke.ParameterValueMapper;
import org.springframework.boot.actuate.endpoint.invoke.reflect.OperationMethod;
import org.springframework.boot.actuate.endpoint.invoke.reflect.ReflectiveOperationInvoker;
import org.springframework.core.MethodIntrospector;
import org.springframework.core.MethodIntrospector.MetadataLookup;
import org.springframework.core.annotation.MergedAnnotation;
import org.springframework.core.annotation.MergedAnnotations;

/**
 * Factory to create an {@link Operation} for annotated methods on an
 * {@link Endpoint @Endpoint} or {@link EndpointExtension @EndpointExtension}.
 *
 * @param <O> the operation type
 * @author Andy Wilkinson
 * @author Stephane Nicoll
 * @author Phillip Webb
 */
abstract class DiscoveredOperationsFactory<O extends Operation> {

	private static final Map<OperationType, Class<? extends Annotation>> OPERATION_TYPES;

	static {
		Map<OperationType, Class<? extends Annotation>> operationTypes = new EnumMap<>(OperationType.class);
		operationTypes.put(OperationType.READ, ReadOperation.class);
		operationTypes.put(OperationType.WRITE, WriteOperation.class);
		operationTypes.put(OperationType.DELETE, DeleteOperation.class);
		OPERATION_TYPES = Collections.unmodifiableMap(operationTypes);
	}

	private final ParameterValueMapper parameterValueMapper;

	private final Collection<OperationInvokerAdvisor> invokerAdvisors;

	DiscoveredOperationsFactory(ParameterValueMapper parameterValueMapper,
			Collection<OperationInvokerAdvisor> invokerAdvisors) {
		this.parameterValueMapper = parameterValueMapper;
		this.invokerAdvisors = invokerAdvisors;
	}

	Collection<O> createOperations(EndpointId id, Object target) {
		return MethodIntrospector
				.selectMethods(target.getClass(), (MetadataLookup<O>) (method) -> createOperation(id, target, method))
				.values();
	}

	private O createOperation(EndpointId endpointId, Object target, Method method) {
		return OPERATION_TYPES.entrySet().stream()
				.map((entry) -> createOperation(endpointId, target, method, entry.getKey(), entry.getValue()))
				.filter(Objects::nonNull).findFirst().orElse(null);
	}

	private O createOperation(EndpointId endpointId, Object target, Method method, OperationType operationType,
			Class<? extends Annotation> annotationType) {
		MergedAnnotation<?> annotation = MergedAnnotations.from(method).get(annotationType);
		if (!annotation.isPresent()) {
			return null;
		}
		DiscoveredOperationMethod operationMethod = new DiscoveredOperationMethod(method, operationType,
				annotation.asAnnotationAttributes());
		OperationInvoker invoker = new ReflectiveOperationInvoker(target, operationMethod, this.parameterValueMapper);
		invoker = applyAdvisors(endpointId, operationMethod, invoker);
		return createOperation(endpointId, operationMethod, invoker);
	}

	private OperationInvoker applyAdvisors(EndpointId endpointId, OperationMethod operationMethod,
			OperationInvoker invoker) {
		if (this.invokerAdvisors != null) {
			for (OperationInvokerAdvisor advisor : this.invokerAdvisors) {
				invoker = advisor.apply(endpointId, operationMethod.getOperationType(), operationMethod.getParameters(),
						invoker);
			}
		}
		return invoker;
	}

	protected abstract O createOperation(EndpointId endpointId, DiscoveredOperationMethod operationMethod,
			OperationInvoker invoker);

}

相关信息

spring 源码目录

相关文章

spring AbstractDiscoveredEndpoint 源码

spring AbstractDiscoveredOperation 源码

spring DeleteOperation 源码

spring DiscoveredEndpoint 源码

spring DiscoveredOperationMethod 源码

spring DiscovererEndpointFilter 源码

spring Endpoint 源码

spring EndpointConverter 源码

spring EndpointDiscoverer 源码

spring EndpointExtension 源码

0  赞