dubbo ExtensionScope 源码
dubbo ExtensionScope 代码
文件路径：/dubbo-common/src/main/java/org/apache/dubbo/common/extension/ExtensionScope.java
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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
*
* http://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.apache.dubbo.common.extension;
import org.apache.dubbo.rpc.model.ApplicationModel;
import org.apache.dubbo.rpc.model.FrameworkModel;
import org.apache.dubbo.rpc.model.ModuleModel;
/**
* Extension SPI Scope
* @see SPI
* @see ExtensionDirector
*/
public enum ExtensionScope {
/**
* The extension instance is used within framework, shared with all applications and modules.
*
* <p>Framework scope SPI extension can only obtain {@link FrameworkModel},
* cannot get the {@link ApplicationModel} and {@link ModuleModel}.</p>
*
* <p></p>
* Consideration:
* <ol>
* <li>Some SPI need share data between applications inside framework</li>
* <li>Stateless SPI is safe shared inside framework</li>
* </ol>
*/
FRAMEWORK,
/**
* The extension instance is used within one application, shared with all modules of the application,
* and different applications create different extension instances.
*
* <p>Application scope SPI extension can obtain {@link FrameworkModel} and {@link ApplicationModel},
* cannot get the {@link ModuleModel}.</p>
*
* <p></p>
* Consideration:
* <ol>
* <li>Isolate extension data in different applications inside framework</li>
* <li>Share extension data between all modules inside application</li>
* </ol>
*/
APPLICATION,
/**
* The extension instance is used within one module, and different modules create different extension instances.
*
* <p>Module scope SPI extension can obtain {@link FrameworkModel}, {@link ApplicationModel} and {@link ModuleModel}.</p>
*
* <p></p>
* Consideration:
* <ol>
* <li>Isolate extension data in different modules inside application</li>
* </ol>
*/
MODULE,
/**
* self-sufficient, creates an instance for per scope, for special SPI extension, like {@link ExtensionInjector}
*/
SELF
}
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