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- /*
- * Copyright (C) 2016 Ericsson
- * and other copyright owners as documented in the project's IP log.
- *
- * This program and the accompanying materials are made available
- * under the terms of the Eclipse Distribution License v1.0 which
- * accompanies this distribution, is reproduced below, and is
- * available at http://www.eclipse.org/org/documents/edl-v10.php
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the following
- * conditions are met:
- *
- * - Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * - Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials provided
- * with the distribution.
- *
- * - Neither the name of the Eclipse Foundation, Inc. nor the
- * names of its contributors may be used to endorse or promote
- * products derived from this software without specific prior
- * written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- package org.eclipse.jgit.lib;
-
- import java.util.concurrent.TimeUnit;
-
- /**
- * Configuration parameters for JVM-wide repository cache used by JGit.
- *
- * @since 4.4
- */
- public class RepositoryCacheConfig {
-
- /**
- * Set cleanupDelayMillis to this value in order to switch off time-based
- * cache eviction. Expired cache entries will only be evicted when
- * RepositoryCache.clearExpired or RepositoryCache.clear are called.
- */
- public static final long NO_CLEANUP = 0;
-
- /**
- * Set cleanupDelayMillis to this value in order to auto-set it to minimum
- * of 1/10 of expireAfterMillis and 10 minutes
- */
- public static final long AUTO_CLEANUP_DELAY = -1;
-
- private long expireAfterMillis;
-
- private long cleanupDelayMillis;
-
- /** Create a default configuration. */
- public RepositoryCacheConfig() {
- expireAfterMillis = TimeUnit.HOURS.toMillis(1);
- cleanupDelayMillis = AUTO_CLEANUP_DELAY;
- }
-
- /**
- * @return the time an unused repository should expired and be evicted from
- * the RepositoryCache in milliseconds. <b>Default is 1 hour.</b>
- */
- public long getExpireAfter() {
- return expireAfterMillis;
- }
-
- /**
- * @param expireAfterMillis
- * the time an unused repository should expired and be evicted
- * from the RepositoryCache in milliseconds.
- */
- public void setExpireAfter(long expireAfterMillis) {
- this.expireAfterMillis = expireAfterMillis;
- }
-
- /**
- * @return the delay between the periodic cleanup of expired repository in
- * milliseconds. <b>Default is minimum of 1/10 of expireAfterMillis
- * and 10 minutes</b>
- */
- public long getCleanupDelay() {
- if (cleanupDelayMillis < 0) {
- return Math.min(expireAfterMillis / 10,
- TimeUnit.MINUTES.toMillis(10));
- }
- return cleanupDelayMillis;
- }
-
- /**
- * @param cleanupDelayMillis
- * the delay between the periodic cleanup of expired repository
- * in milliseconds. Set it to {@link #AUTO_CLEANUP_DELAY} to
- * automatically derive cleanup delay from expireAfterMillis.
- * <p>
- * Set it to {@link #NO_CLEANUP} in order to switch off cache
- * expiration.
- * <p>
- * If cache expiration is switched off the JVM still can evict
- * cache entries when the JVM is running low on available heap
- * memory.
- */
- public void setCleanupDelay(long cleanupDelayMillis) {
- this.cleanupDelayMillis = cleanupDelayMillis;
- }
-
- /**
- * Update properties by setting fields from the configuration.
- * <p>
- * If a property is not defined in the configuration, then it is left
- * unmodified.
- *
- * @param config
- * configuration to read properties from.
- * @return {@code this}.
- */
- public RepositoryCacheConfig fromConfig(Config config) {
- setExpireAfter(
- config.getTimeUnit("core", null, "repositoryCacheExpireAfter", //$NON-NLS-1$//$NON-NLS-2$
- getExpireAfter(), TimeUnit.MILLISECONDS));
- setCleanupDelay(
- config.getTimeUnit("core", null, "repositoryCacheCleanupDelay", //$NON-NLS-1$ //$NON-NLS-2$
- AUTO_CLEANUP_DELAY, TimeUnit.MILLISECONDS));
- return this;
- }
-
- /**
- * Install this configuration as the live settings.
- * <p>
- * The new configuration is applied immediately.
- */
- public void install() {
- RepositoryCache.reconfigure(this);
- }
- }
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