org.apache.ignite.internal.processors.cache.distributed.dht.preloader.IgniteDhtPartitionCountersMap Maven / Gradle / Ivy
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Java-based middleware for in-memory processing of big data in a distributed environment.
/*
* 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.ignite.internal.processors.cache.distributed.dht.preloader;
import java.io.Serializable;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import org.apache.ignite.internal.util.typedef.T2;
import org.apache.ignite.internal.util.typedef.internal.S;
/**
* Partition counters map.
*/
public class IgniteDhtPartitionCountersMap implements Serializable {
/** */
private static final long serialVersionUID = 0L;
/** */
private Map>> map;
/**
* @return {@code True} if map is empty.
*/
public synchronized boolean empty() {
return map == null || map.isEmpty();
}
/**
* @param cacheId Cache ID.
* @param cntrMap Counters map.
*/
public synchronized void putIfAbsent(int cacheId, Map> cntrMap) {
if (map == null)
map = new HashMap<>();
if (!map.containsKey(cacheId))
map.put(cacheId, cntrMap);
}
/**
* @param cacheId Cache ID.
* @return Counters map.
*/
public synchronized Map> get(int cacheId) {
if (map == null)
map = new HashMap<>();
Map> cntrMap = map.get(cacheId);
if (cntrMap == null)
return Collections.emptyMap();
return cntrMap;
}
/** {@inheritDoc} */
@Override public String toString() {
return S.toString(IgniteDhtPartitionCountersMap.class, this);
}
}