88 lines
2.8 KiB
Java
88 lines
2.8 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.cassandra.db.commitlog;
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import java.io.IOException;
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import java.util.List;
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import java.util.Map;
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public interface CommitLogMBean {
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/**
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* Command to execute to archive a commitlog segment. Blank to disabled.
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*/
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public String getArchiveCommand();
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/**
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* Command to execute to make an archived commitlog live again
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*/
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public String getRestoreCommand();
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/**
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* Directory to scan the recovery files in
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*/
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public String getRestoreDirectories();
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/**
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* Restore mutations created up to and including this timestamp in GMT
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* Format: yyyy:MM:dd HH:mm:ss (2012:04:31 20:43:12)
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*
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* Recovery will continue through the segment when the first client-supplied
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* timestamp greater than this time is encountered, but only mutations less
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* than or equal to this timestamp will be applied.
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*/
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public long getRestorePointInTime();
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/**
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* get precision of the timestamp used in the restore (MILLISECONDS,
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* MICROSECONDS, ...) to determine if passed the restore point in time.
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*/
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public String getRestorePrecision();
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/**
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* Recover a single file.
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*/
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public void recover(String path) throws IOException;
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/**
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* @return file names (not full paths) of active commit log segments
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* (segments containing unflushed data)
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*/
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public List<String> getActiveSegmentNames();
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/**
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* @return Files which are pending for archival attempt. Does NOT include failed archive attempts.
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*/
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public List<String> getArchivingSegmentNames();
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/**
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* @return The size of the mutations in all active commit log segments (uncompressed).
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*/
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public long getActiveContentSize();
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/**
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* @return The space taken on disk by the commit log (compressed).
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*/
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public long getActiveOnDiskSize();
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/**
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* @return A map between active log segments and the compression ratio achieved for each.
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*/
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public Map<String, Double> getActiveSegmentCompressionRatios();
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}
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