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TsFileFlushPolicy.java
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TsFileFlushPolicy.java
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/*
* 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.iotdb.db.engine.flush;
import org.apache.iotdb.db.engine.storagegroup.StorageGroupProcessor;
import org.apache.iotdb.db.engine.storagegroup.TsFileProcessor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* TsFileFlushPolicy is applied when a TsFileProcessor is full after insertion. For standalone
* IoTDB, the flush or close is executed without constraint. But in the distributed version, the
* close is controlled by the leader and should not be performed by the follower alone.
*/
public interface TsFileFlushPolicy {
void apply(StorageGroupProcessor storageGroupProcessor, TsFileProcessor processor, boolean isSeq);
class DirectFlushPolicy implements TsFileFlushPolicy{
private static final Logger logger = LoggerFactory.getLogger(DirectFlushPolicy.class);
@Override
public void apply(StorageGroupProcessor storageGroupProcessor, TsFileProcessor tsFileProcessor,
boolean isSeq) {
logger.info("The memtable size {} reaches the threshold, async flush it to tsfile: {}",
tsFileProcessor.getWorkMemTableMemory(),
tsFileProcessor.getTsFileResource().getFile().getAbsolutePath());
if (tsFileProcessor.shouldClose()) {
storageGroupProcessor.moveOneWorkProcessorToClosingList(isSeq);
} else {
tsFileProcessor.asyncFlush();
}
}
}
}