hadoop AbstractAuditSpanImpl 源码
haddop AbstractAuditSpanImpl 代码
文件路径：/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/audit/impl/AbstractAuditSpanImpl.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.s3a.audit.impl;
import org.apache.hadoop.fs.s3a.audit.AuditSpanS3A;
import org.apache.hadoop.fs.store.audit.AuditSpan;
import org.apache.hadoop.util.Time;
import static java.util.Objects.requireNonNull;
/**
* Base class for the audit spans implementations..
*/
public abstract class AbstractAuditSpanImpl implements AuditSpanS3A {
/**
* Span ID.
*/
private final String spanId;
/**
* Timestamp in UTC of span creation.
*/
private final long timestamp;
private final String operationName;
/**
* Constructor.
* @param spanId span ID.
* @param operationName operation name
*/
protected AbstractAuditSpanImpl(
final String spanId,
final String operationName) {
this(spanId, Time.now(), operationName);
}
/**
* Constructor.
* @param spanId span ID.
* @param timestamp timestamp in millis
* @param operationName operation name
*/
protected AbstractAuditSpanImpl(
final String spanId,
final long timestamp,
final String operationName) {
this.spanId = requireNonNull(spanId);
this.timestamp = timestamp;
this.operationName = operationName;
}
@Override
public final String getSpanId() {
return spanId;
}
@Override
public String getOperationName() {
return operationName;
}
@Override
public final long getTimestamp() {
return timestamp;
}
@Override
public AuditSpanS3A activate() {
return this;
}
/**
* Invoke {@link AuditSpan#deactivate()}.
* This is final: subclasses MUST override the
* {@code deactivate()} method.
*/
@Override
public final void close() {
deactivate();
}
}
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