/*
* Copyright 2016 the original author or authors.
*
* Licensed 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.gradle.api.internal.changedetection.state;
import com.google.common.cache.Cache;
import com.google.common.cache.RemovalCause;
import com.google.common.cache.RemovalListener;
import com.google.common.cache.RemovalNotification;
import org.gradle.api.logging.LogLevel;
import org.gradle.api.logging.Logger;
import org.gradle.api.logging.Logging;
class LoggingEvictionListener implements RemovalListener<Object, Object> {
private static Logger logger = Logging.getLogger(LoggingEvictionListener.class);
private static final String EVICTION_MITIGATION_MESSAGE = "\nPerformance may suffer from in-memory cache misses. Increase max heap size of Gradle build process to reduce cache misses.";
volatile int evictionCounter;
private final String cacheId;
private Cache<Object, Object> cache;
private final int maxSize;
private final int logInterval;
LoggingEvictionListener(String cacheId, int maxSize) {
this.cacheId = cacheId;
this.maxSize = maxSize;
this.logInterval = maxSize / 10;
}
public void setCache(Cache<Object, Object> cache) {
this.cache = cache;
}
@Override
public void onRemoval(RemovalNotification<Object, Object> notification) {
if (notification.getCause() == RemovalCause.SIZE) {
if (evictionCounter % logInterval == 0) {
logger.log(LogLevel.INFO, "Cache entries evicted. In-memory cache of {}: Size{{}} MaxSize{{}}, {} {}", cacheId, cache.size(), maxSize, cache.stats(), EVICTION_MITIGATION_MESSAGE);
}
evictionCounter++;
}
}
}