org.apache.hadoop.fs.s3a.s3guard.MetastoreInstrumentation Maven / Gradle / Ivy
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This module contains code to support integration with Amazon Web Services.
It also declares the dependencies needed to work with AWS services.
/*
* 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.s3guard;
/**
* Instrumentation exported to S3Guard.
*/
public interface MetastoreInstrumentation {
/** Initialized event. */
void initialized();
/** Store has been closed. */
void storeClosed();
/**
* Throttled request.
*/
void throttled();
/**
* S3Guard is retrying after a (retryable) failure.
*/
void retrying();
/**
* Records have been deleted.
* @param count the number of records deleted.
*/
void recordsDeleted(int count);
/**
* Records have been read.
* @param count the number of records read
*/
void recordsRead(int count);
/**
* records have been written (including tombstones).
* @param count number of records written.
*/
void recordsWritten(int count);
/**
* A directory has been tagged as authoritative.
*/
void directoryMarkedAuthoritative();
/**
* An entry was added.
* @param durationNanos time to add
*/
void entryAdded(long durationNanos);
}