    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one or more
    003 * contributor license agreements.  See the NOTICE file distributed with
    004 * this work for additional information regarding copyright ownership.
    005 * The ASF licenses this file to You under the Apache License, Version 2.0
    006 * (the "License"); you may not use this file except in compliance with
    007 * the License.  You may obtain a copy of the License at
    008 *
    009 *      http://www.apache.org/licenses/LICENSE-2.0
    010 *
    011 * Unless required by applicable law or agreed to in writing, software
    012 * distributed under the License is distributed on an "AS IS" BASIS,
    013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014 * See the License for the specific language governing permissions and
    015 * limitations under the License.
    016 */
    017package org.apache.commons.pool2.impl;
    018
    019import java.time.Duration;
    020
    021/**
    022 * This class is used by pool implementations to pass configuration information
    023 * to {@link EvictionPolicy} instances. The {@link EvictionPolicy} may also have
    024 * its own specific configuration attributes.
    025 * <p>
    026 * This class is immutable and thread-safe.
    027 * </p>
    028 *
    029 * @since 2.0
    030 */
    031public class EvictionConfig {
    032
    033    private static final Duration MAX_DURATION = Duration.ofMillis(Long.MAX_VALUE);
    034    private final Duration idleEvictDuration;
    035    private final Duration idleSoftEvictDuration;
    036    private final int minIdle;
    037
    038    /**
    039     * Creates a new eviction configuration with the specified parameters.
    040     * Instances are immutable.
    041     *
    042     * @param idleEvictDuration Expected to be provided by
    043     *        {@link BaseGenericObjectPool#getMinEvictableIdleDuration()}
    044     * @param idleSoftEvictDuration Expected to be provided by
    045     *        {@link BaseGenericObjectPool#getSoftMinEvictableIdleDuration()}
    046     * @param minIdle Expected to be provided by
    047     *        {@link GenericObjectPool#getMinIdle()} or
    048     *        {@link GenericKeyedObjectPool#getMinIdlePerKey()}
    049     * @since 2.10.0
    050     */
    051    public EvictionConfig(final Duration idleEvictDuration, final Duration idleSoftEvictDuration, final int minIdle) {
    052        this.idleEvictDuration = PoolImplUtils.isPositive(idleEvictDuration) ? idleEvictDuration : MAX_DURATION;
    053        this.idleSoftEvictDuration = PoolImplUtils.isPositive(idleSoftEvictDuration) ? idleSoftEvictDuration : MAX_DURATION;
    054        this.minIdle = minIdle;
    055    }
    056
    057    /**
    058     * Creates a new eviction configuration with the specified parameters.
    059     * Instances are immutable.
    060     *
    061     * @param poolIdleEvictMillis Expected to be provided by
    062     *        {@link BaseGenericObjectPool#getMinEvictableIdleDuration()}
    063     * @param poolIdleSoftEvictMillis Expected to be provided by
    064     *        {@link BaseGenericObjectPool#getSoftMinEvictableIdleDuration()}
    065     * @param minIdle Expected to be provided by
    066     *        {@link GenericObjectPool#getMinIdle()} or
    067     *        {@link GenericKeyedObjectPool#getMinIdlePerKey()}
    068     * @deprecated Use {@link #EvictionConfig(Duration, Duration, int)}.
    069     */
    070    @Deprecated
    071    public EvictionConfig(final long poolIdleEvictMillis, final long poolIdleSoftEvictMillis, final int minIdle) {
    072        this(Duration.ofMillis(poolIdleEvictMillis), Duration.ofMillis(poolIdleSoftEvictMillis), minIdle);
    073    }
    074
    075    /**
    076     * Gets the {@code idleEvictTime} for this eviction configuration
    077     * instance.
    078     * <p>
    079     * How the evictor behaves based on this value will be determined by the
    080     * configured {@link EvictionPolicy}.
    081     * </p>
    082     *
    083     * @return The {@code idleEvictTime}.
    084     * @since 2.11.0
    085     */
    086    public Duration getIdleEvictDuration() {
    087        return idleEvictDuration;
    088    }
    089
    090    /**
    091     * Gets the {@code idleEvictTime} for this eviction configuration
    092     * instance.
    093     * <p>
    094     * How the evictor behaves based on this value will be determined by the
    095     * configured {@link EvictionPolicy}.
    096     * </p>
    097     *
    098     * @return The {@code idleEvictTime} in milliseconds
    099     * @deprecated Use {@link #getIdleEvictDuration()}.
    100     */
    101    @Deprecated
    102    public long getIdleEvictTime() {
    103        return idleEvictDuration.toMillis();
    104    }
    105
    106    /**
    107     * Gets the {@code idleEvictTime} for this eviction configuration
    108     * instance.
    109     * <p>
    110     * How the evictor behaves based on this value will be determined by the
    111     * configured {@link EvictionPolicy}.
    112     * </p>
    113     *
    114     * @return The {@code idleEvictTime}.
    115     * @since 2.10.0
    116     * @deprecated Use {@link #getIdleEvictDuration()}.
    117     */
    118    @Deprecated
    119    public Duration getIdleEvictTimeDuration() {
    120        return idleEvictDuration;
    121    }
    122
    123    /**
    124     * Gets the {@code idleSoftEvictTime} for this eviction configuration
    125     * instance.
    126     * <p>
    127     * How the evictor behaves based on this value will be determined by the
    128     * configured {@link EvictionPolicy}.
    129     * </p>
    130     *
    131     * @return The (@code idleSoftEvictTime} in milliseconds
    132     * @since 2.11.0
    133     */
    134    public Duration getIdleSoftEvictDuration() {
    135        return idleSoftEvictDuration;
    136    }
    137
    138    /**
    139     * Gets the {@code idleSoftEvictTime} for this eviction configuration
    140     * instance.
    141     * <p>
    142     * How the evictor behaves based on this value will be determined by the
    143     * configured {@link EvictionPolicy}.
    144     * </p>
    145     *
    146     * @return The (@code idleSoftEvictTime} in milliseconds
    147     * @deprecated Use {@link #getIdleSoftEvictDuration()}.
    148     */
    149    @Deprecated
    150    public long getIdleSoftEvictTime() {
    151        return idleSoftEvictDuration.toMillis();
    152    }
    153
    154    /**
    155     * Gets the {@code idleSoftEvictTime} for this eviction configuration
    156     * instance.
    157     * <p>
    158     * How the evictor behaves based on this value will be determined by the
    159     * configured {@link EvictionPolicy}.
    160     * </p>
    161     *
    162     * @return The (@code idleSoftEvictTime} in milliseconds
    163     * @deprecated Use {@link #getIdleSoftEvictDuration()}.
    164     */
    165    @Deprecated
    166    public Duration getIdleSoftEvictTimeDuration() {
    167        return idleSoftEvictDuration;
    168    }
    169
    170    /**
    171     * Gets the {@code minIdle} for this eviction configuration instance.
    172     * <p>
    173     * How the evictor behaves based on this value will be determined by the
    174     * configured {@link EvictionPolicy}.
    175     * </p>
    176     *
    177     * @return The {@code minIdle}
    178     */
    179    public int getMinIdle() {
    180        return minIdle;
    181    }
    182
    183    /**
    184     * @since 2.4
    185     */
    186    @Override
    187    public String toString() {
    188        final StringBuilder builder = new StringBuilder();
    189        builder.append("EvictionConfig [idleEvictDuration=");
    190        builder.append(idleEvictDuration);
    191        builder.append(", idleSoftEvictDuration=");
    192        builder.append(idleSoftEvictDuration);
    193        builder.append(", minIdle=");
    194        builder.append(minIdle);
    195        builder.append("]");
    196        return builder.toString();
    197    }
    198}