123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211 |
- /*
- * Copyright (C) 2011, Google Inc.
- * 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.internal.storage.dfs;
-
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_CORE_SECTION;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_DFS_SECTION;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_BLOCK_LIMIT;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_BLOCK_SIZE;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_CONCURRENCY_LEVEL;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_STREAM_RATIO;
-
- import java.text.MessageFormat;
-
- import org.eclipse.jgit.internal.JGitText;
- import org.eclipse.jgit.lib.Config;
-
- /** Configuration parameters for {@link DfsBlockCache}. */
- public class DfsBlockCacheConfig {
- /** 1024 (number of bytes in one kibibyte/kilobyte) */
- public static final int KB = 1024;
-
- /** 1024 {@link #KB} (number of bytes in one mebibyte/megabyte) */
- public static final int MB = 1024 * KB;
-
- private long blockLimit;
- private int blockSize;
- private double streamRatio;
- private int concurrencyLevel;
-
- /** Create a default configuration. */
- public DfsBlockCacheConfig() {
- setBlockLimit(32 * MB);
- setBlockSize(64 * KB);
- setStreamRatio(0.30);
- setConcurrencyLevel(32);
- }
-
- /**
- * @return maximum number bytes of heap memory to dedicate to caching pack
- * file data. <b>Default is 32 MB.</b>
- */
- public long getBlockLimit() {
- return blockLimit;
- }
-
- /**
- * @param newLimit
- * maximum number bytes of heap memory to dedicate to caching
- * pack file data.
- * @return {@code this}
- */
- public DfsBlockCacheConfig setBlockLimit(final long newLimit) {
- blockLimit = newLimit;
- return this;
- }
-
- /**
- * @return size in bytes of a single window mapped or read in from the pack
- * file. <b>Default is 64 KB.</b>
- */
- public int getBlockSize() {
- return blockSize;
- }
-
- /**
- * @param newSize
- * size in bytes of a single window read in from the pack file.
- * The value must be a power of 2.
- * @return {@code this}
- */
- public DfsBlockCacheConfig setBlockSize(final int newSize) {
- int size = Math.max(512, newSize);
- if ((size & (size - 1)) != 0) {
- throw new IllegalArgumentException(
- JGitText.get().blockSizeNotPowerOf2);
- }
- blockSize = size;
- return this;
- }
-
- /**
- * @return the estimated number of threads concurrently accessing the cache.
- * <b>Default is 32.</b>
- * @since 4.6
- */
- public int getConcurrencyLevel() {
- return concurrencyLevel;
- }
-
- /**
- * @param newConcurrencyLevel
- * the estimated number of threads concurrently accessing the
- * cache.
- * @return {@code this}
- * @since 4.6
- */
- public DfsBlockCacheConfig setConcurrencyLevel(
- final int newConcurrencyLevel) {
- concurrencyLevel = newConcurrencyLevel;
- return this;
- }
-
- /**
- * @return highest percentage of {@link #getBlockLimit()} a single pack can
- * occupy while being copied by the pack reuse strategy. <b>Default
- * is 0.30, or 30%</b>.
- * @since 4.0
- */
- public double getStreamRatio() {
- return streamRatio;
- }
-
- /**
- * @param ratio
- * percentage of cache to occupy with a copied pack.
- * @return {@code this}
- * @since 4.0
- */
- public DfsBlockCacheConfig setStreamRatio(double ratio) {
- streamRatio = Math.max(0, Math.min(ratio, 1.0));
- return this;
- }
-
- /**
- * Update properties by setting fields from the configuration.
- * <p>
- * If a property is not defined in the configuration, then it is left
- * unmodified.
- *
- * @param rc
- * configuration to read properties from.
- * @return {@code this}
- */
- public DfsBlockCacheConfig fromConfig(final Config rc) {
- setBlockLimit(rc.getLong(
- CONFIG_CORE_SECTION,
- CONFIG_DFS_SECTION,
- CONFIG_KEY_BLOCK_LIMIT,
- getBlockLimit()));
-
- setBlockSize(rc.getInt(
- CONFIG_CORE_SECTION,
- CONFIG_DFS_SECTION,
- CONFIG_KEY_BLOCK_SIZE,
- getBlockSize()));
-
- setConcurrencyLevel(rc.getInt(
- CONFIG_CORE_SECTION,
- CONFIG_DFS_SECTION,
- CONFIG_KEY_CONCURRENCY_LEVEL,
- getConcurrencyLevel()));
-
- String v = rc.getString(
- CONFIG_CORE_SECTION,
- CONFIG_DFS_SECTION,
- CONFIG_KEY_STREAM_RATIO);
- if (v != null) {
- try {
- setStreamRatio(Double.parseDouble(v));
- } catch (NumberFormatException e) {
- throw new IllegalArgumentException(MessageFormat.format(
- JGitText.get().enumValueNotSupported3,
- CONFIG_CORE_SECTION,
- CONFIG_DFS_SECTION,
- CONFIG_KEY_STREAM_RATIO, v));
- }
- }
- return this;
- }
- }
|