hadoop AbstractStoreOperation 源码
haddop AbstractStoreOperation 代码
文件路径：/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/impl/AbstractStoreOperation.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.impl;
import javax.annotation.Nullable;
import org.apache.hadoop.fs.store.audit.AuditSpan;
/**
* Base class of operations in the store.
* An operation is something which executes against the context to
* perform a single function.
*/
public abstract class AbstractStoreOperation {
/**
* Store context.
*/
private final StoreContext storeContext;
/**
* Audit Span.
*/
private final AuditSpan auditSpan;
/**
* Constructor.
* Picks up the active audit span from the store context and
* stores it for later.
* @param storeContext store context.
*/
protected AbstractStoreOperation(final @Nullable StoreContext storeContext) {
this(storeContext,
storeContext != null
? storeContext.getActiveAuditSpan()
: null);
}
/**
* Constructor.
* @param storeContext store context.
* @param auditSpan active span
*/
protected AbstractStoreOperation(
final @Nullable StoreContext storeContext,
final AuditSpan auditSpan) {
this.storeContext = storeContext;
this.auditSpan = auditSpan;
}
/**
* Get the store context.
* @return the context.
*/
public final StoreContext getStoreContext() {
return storeContext;
}
/**
* Get the audit span this object was created with.
* @return the current span or null
*/
public AuditSpan getAuditSpan() {
return auditSpan;
}
/**
* Activate the audit span.
*/
public void activateAuditSpan() {
if (auditSpan != null) {
auditSpan.activate();
}
}
}
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