org.apache.flink.runtime.state.gemini.engine.fs.PersistenceProxy Maven / Gradle / Ivy
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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.flink.runtime.state.gemini.engine.fs;
import org.apache.flink.runtime.state.gemini.engine.GRegion;
import org.apache.flink.runtime.state.gemini.engine.page.PageAddress;
import org.apache.flink.shaded.guava18.com.google.common.base.MoreObjects;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
/**
* PersistenceProxy dynamic to persist DFS or Local based on page size.
* For example, if page is very huge, then avoiding to evict more space, flush the page to local directly.
*/
public class PersistenceProxy implements PersistenceStrategy {
private final List persistenceModule;
public PersistenceProxy() {
persistenceModule = new ArrayList<>();
}
void add(PersistenceStrategy persistenceStrategy) {
persistenceModule.add(persistenceStrategy);
}
@Override
public void persistPage(GRegion gRegion, PageAddress pageAddress, int compactedMemSize) {
for (PersistenceStrategy persistenceStrategy : persistenceModule) {
persistenceStrategy.persistPage(gRegion, pageAddress, compactedMemSize);
}
}
@Override
public void close() throws IOException {
}
@Override
public String toString() {
return MoreObjects.toStringHelper(this).
add("persistenceModule", persistenceModule).toString();
}
}