org.apache.commons.pool2.impl.EvictionConfig Maven / Gradle / Ivy
/*
* 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.commons.pool2.impl;
/**
* This class is used by pool implementations to pass configuration information
* to {@link EvictionPolicy} instances. The {@link EvictionPolicy} may also have
* its own specific configuration attributes.
*
* This class is immutable and thread-safe.
*
* @since 2.0
*/
public class EvictionConfig {
private final long idleEvictTime;
private final long idleSoftEvictTime;
private final int minIdle;
/**
* Create a new eviction configuration with the specified parameters.
* Instances are immutable.
*
* @param poolIdleEvictTime Expected to be provided by
* {@link BaseGenericObjectPool#getMinEvictableIdleTimeMillis()}
* @param poolIdleSoftEvictTime Expected to be provided by
* {@link BaseGenericObjectPool#getSoftMinEvictableIdleTimeMillis()}
* @param minIdle Expected to be provided by
* {@link GenericObjectPool#getMinIdle()} or
* {@link GenericKeyedObjectPool#getMinIdlePerKey()}
*/
public EvictionConfig(final long poolIdleEvictTime, final long poolIdleSoftEvictTime,
final int minIdle) {
if (poolIdleEvictTime > 0) {
idleEvictTime = poolIdleEvictTime;
} else {
idleEvictTime = Long.MAX_VALUE;
}
if (poolIdleSoftEvictTime > 0) {
idleSoftEvictTime = poolIdleSoftEvictTime;
} else {
idleSoftEvictTime = Long.MAX_VALUE;
}
this.minIdle = minIdle;
}
/**
* Obtain the {@code idleEvictTime} for this eviction configuration
* instance.
*
* How the evictor behaves based on this value will be determined by the
* configured {@link EvictionPolicy}.
*
* @return The {@code idleEvictTime} in milliseconds
*/
public long getIdleEvictTime() {
return idleEvictTime;
}
/**
* Obtain the {@code idleSoftEvictTime} for this eviction configuration
* instance.
*
* How the evictor behaves based on this value will be determined by the
* configured {@link EvictionPolicy}.
*
* @return The (@code idleSoftEvictTime} in milliseconds
*/
public long getIdleSoftEvictTime() {
return idleSoftEvictTime;
}
/**
* Obtain the {@code minIdle} for this eviction configuration instance.
*
* How the evictor behaves based on this value will be determined by the
* configured {@link EvictionPolicy}.
*
* @return The {@code minIdle}
*/
public int getMinIdle() {
return minIdle;
}
/**
* @since 2.4
*/
@Override
public String toString() {
final StringBuilder builder = new StringBuilder();
builder.append("EvictionConfig [idleEvictTime=");
builder.append(idleEvictTime);
builder.append(", idleSoftEvictTime=");
builder.append(idleSoftEvictTime);
builder.append(", minIdle=");
builder.append(minIdle);
builder.append("]");
return builder.toString();
}
}