/*
* Copyright (C) 2016, 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
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package org.eclipse.jgit.internal.ketch;
import static java.util.concurrent.TimeUnit.DAYS;
import static java.util.concurrent.TimeUnit.HOURS;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import static java.util.concurrent.TimeUnit.MINUTES;
import static java.util.concurrent.TimeUnit.SECONDS;
import static org.eclipse.jgit.internal.ketch.KetchConstants.CONFIG_KEY_COMMIT;
import static org.eclipse.jgit.internal.ketch.KetchConstants.CONFIG_KEY_SPEED;
import static org.eclipse.jgit.internal.ketch.KetchConstants.CONFIG_KEY_TYPE;
import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_REMOTE;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.eclipse.jgit.internal.ketch.KetchReplica.CommitMethod;
import org.eclipse.jgit.internal.ketch.KetchReplica.CommitSpeed;
import org.eclipse.jgit.internal.ketch.KetchReplica.Participation;
import org.eclipse.jgit.lib.Config;
/** Configures a {@link KetchReplica}. */
public class ReplicaConfig {
/**
* Read a configuration from a config block.
*
* @param cfg
* configuration to read.
* @param name
* of the replica being configured.
* @return replica configuration for {@code name}.
*/
public static ReplicaConfig newFromConfig(Config cfg, String name) {
return new ReplicaConfig().fromConfig(cfg, name);
}
private Participation participation = Participation.FULL;
private CommitMethod commitMethod = CommitMethod.ALL_REFS;
private CommitSpeed commitSpeed = CommitSpeed.BATCHED;
private long minRetry = SECONDS.toMillis(5);
private long maxRetry = MINUTES.toMillis(1);
/** @return participation of the replica in the system. */
public Participation getParticipation() {
return participation;
}
/** @return how Ketch should apply committed changes. */
public CommitMethod getCommitMethod() {
return commitMethod;
}
/** @return how quickly should Ketch commit. */
public CommitSpeed getCommitSpeed() {
return commitSpeed;
}
/**
* Returns the minimum wait delay before retrying a failure.
*
* @param unit
* to get retry delay in.
* @return minimum delay before retrying a failure.
*/
public long getMinRetry(TimeUnit unit) {
return unit.convert(minRetry, MILLISECONDS);
}
/**
* Returns the maximum wait delay before retrying a failure.
*
* @param unit
* to get retry delay in.
* @return maximum delay before retrying a failure.
*/
public long getMaxRetry(TimeUnit unit) {
return unit.convert(maxRetry, MILLISECONDS);
}
/**
* Update the configuration from a config block.
*
* @param cfg
* configuration to read.
* @param name
* of the replica being configured.
* @return {@code this}
*/
public ReplicaConfig fromConfig(Config cfg, String name) {
participation = cfg.getEnum(
CONFIG_KEY_REMOTE, name, CONFIG_KEY_TYPE,
participation);
commitMethod = cfg.getEnum(
CONFIG_KEY_REMOTE, name, CONFIG_KEY_COMMIT,
commitMethod);
commitSpeed = cfg.getEnum(
CONFIG_KEY_REMOTE, name, CONFIG_KEY_SPEED,
commitSpeed);
minRetry = getMillis(cfg, name, "ketch-minRetry", minRetry); //$NON-NLS-1$
maxRetry = getMillis(cfg, name, "ketch-maxRetry", maxRetry); //$NON-NLS-1$
return this;
}
private static long getMillis(Config cfg, String name, String key,
long defaultValue) {
String valStr = cfg.getString(CONFIG_KEY_REMOTE, name, key);
if (valStr == null) {
return defaultValue;
}
valStr = valStr.trim();
if (valStr.isEmpty()) {
return defaultValue;
}
Matcher m = UnitMap.PATTERN.matcher(valStr);
if (!m.matches()) {
return defaultValue;
}
String digits = m.group(1);
String unitName = m.group(2).trim();
TimeUnit unit = UnitMap.UNITS.get(unitName);
if (unit == null) {
return defaultValue;
}
try {
if (digits.indexOf('.') == -1) {
return unit.toMillis(Long.parseLong(digits));
}
double val = Double.parseDouble(digits);
return (long) (val * unit.toMillis(1));
} catch (NumberFormatException nfe) {
return defaultValue;
}
}
static class UnitMap {
static final Pattern PATTERN = Pattern
.compile("^([1-9][0-9]*(?:\\.[0-9]*)?)\\s*(.*)$"); //$NON-NLS-1$
static final Map<String, TimeUnit> UNITS;
static {
Map<String, TimeUnit> m = new HashMap<>();
TimeUnit u = MILLISECONDS;
m.put("", u); //$NON-NLS-1$
m.put("ms", u); //$NON-NLS-1$
m.put("millis", u); //$NON-NLS-1$
m.put("millisecond", u); //$NON-NLS-1$
m.put("milliseconds", u); //$NON-NLS-1$
u = SECONDS;
m.put("s", u); //$NON-NLS-1$
m.put("sec", u); //$NON-NLS-1$
m.put("secs", u); //$NON-NLS-1$
m.put("second", u); //$NON-NLS-1$
m.put("seconds", u); //$NON-NLS-1$
u = MINUTES;
m.put("m", u); //$NON-NLS-1$
m.put("min", u); //$NON-NLS-1$
m.put("mins", u); //$NON-NLS-1$
m.put("minute", u); //$NON-NLS-1$
m.put("minutes", u); //$NON-NLS-1$
u = HOURS;
m.put("h", u); //$NON-NLS-1$
m.put("hr", u); //$NON-NLS-1$
m.put("hrs", u); //$NON-NLS-1$
m.put("hour", u); //$NON-NLS-1$
m.put("hours", u); //$NON-NLS-1$
u = DAYS;
m.put("d", u); //$NON-NLS-1$
m.put("day", u); //$NON-NLS-1$
m.put("days", u); //$NON-NLS-1$
UNITS = Collections.unmodifiableMap(m);
}
private UnitMap() {
}
}
}