hadoop AuditEntryPoint 源码
haddop AuditEntryPoint 代码
文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/store/audit/AuditEntryPoint.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.hadoop.fs.store.audit;
import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
/**
* A marker attribute simply to highlight which of the methods
* in a FileSystem why are audit entry points.
* <ol>
* <li>
* A FS method is an AuditEntryPoint if, on invocation it
* creates and activates an Audit Span for that FS.
* </li>
* <li>
* The audit span SHOULD be deactivated before returning,
* </li>
* <li>
* Objects returned by the API call which go on
* to make calls of the filesystem MUST perform
* all IO within the same audit span.
* </li>
* <li>
* Audit Entry points SHOULD NOT invoke other Audit Entry Points.
* This is to ensure the original audit span information
* is not replaced.
* </li>
* </ol>
* FileSystem methods the entry point then invokes
* SHOULD NOT invoke audit entry points internally.
*
* All external methods MUST be audit entry points.
*/
@Documented
@Retention(RetentionPolicy.SOURCE)
public @interface AuditEntryPoint {
}
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