Add log rules
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3 changed files with 152 additions and 10 deletions
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/*
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* STAROPENSOURCE ENGINE SOURCE FILE
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* Copyright (c) 2024 The StarOpenSource Engine Contributors
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* Licensed under the GNU Affero General Public License v3
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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package de.staropensource.sosengine.base.classes.logging;
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import de.staropensource.sosengine.base.types.LogIssuer;
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import de.staropensource.sosengine.base.types.LogLevel;
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import lombok.Getter;
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import org.jetbrains.annotations.NotNull;
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/**
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* Defines a rule used during logging to allow or prevent certain log calls.
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*
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* @since 1-alpha1
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*/
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@SuppressWarnings({ "unused", "JavadocDeclaration", "JavadocBlankLines" })
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@Getter
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public class LogRule {
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/**
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* Determines if the log rule should disallow or permit matching log calls.
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*
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* @see LogRuleType
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* @since 1-alpha1
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*
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* -- GETTER --
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* Returns if the log rule should disallow or permit matching log calls.
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*
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* @return rule type
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* @see LogRuleType
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* @since 1-alpha1
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*/
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@NotNull
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private final LogRuleType type;
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/**
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* Constructor.
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*/
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public LogRule(@NotNull LogRuleType type) {
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this.type = type;
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}
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/**
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* Evaluates the rule and returns if the rule matches.
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*
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* @param issuer issuer
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* @param level log level
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* @param message raw message
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*/
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public boolean evaluate(@NotNull LogIssuer issuer, @NotNull LogLevel level, @NotNull String message) {
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return false;
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}
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}
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@ -0,0 +1,43 @@
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/*
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* STAROPENSOURCE ENGINE SOURCE FILE
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* Copyright (c) 2024 The StarOpenSource Engine Contributors
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* Licensed under the GNU Affero General Public License v3
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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package de.staropensource.sosengine.base.classes.logging;
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/**
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* Used for determining if a {@link LogRule} should allow (whitelist) or prevent (blacklist) log call processing.
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*
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* @since 1-alpha1
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*/
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@SuppressWarnings({ "unused" })
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public enum LogRuleType {
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/**
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* Indicates that log calls matching this rule will always be allowed, even if blacklisted.
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*
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* @since 1-alpha1
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*/
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WHITELIST,
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/**
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* Indicates that log calls matching this will always be disallowed except when whitelisted.
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*
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* @see LogRuleType#WHITELIST
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* @since 1-alpha1
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*/
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BLACKLIST
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}
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@ -21,6 +21,8 @@ package de.staropensource.sosengine.base.logging;
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import de.staropensource.sosengine.base.Engine;
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import de.staropensource.sosengine.base.EngineConfiguration;
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import de.staropensource.sosengine.base.classes.logging.LogRule;
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import de.staropensource.sosengine.base.classes.logging.LogRuleType;
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import de.staropensource.sosengine.base.classes.logging.LoggerImpl;
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import de.staropensource.sosengine.base.classes.Placeholder;
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import de.staropensource.sosengine.base.events.LogEvent;
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@ -94,6 +96,20 @@ public final class Logger {
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*/
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private static final LinkedList<QueuedLogMessage> queuedMessages = new LinkedList<>();
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/**
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* Contains all active {@link LogRule}s.
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*
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* @since 1-alpha1
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*
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* -- GETTER --
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* Returns all active {@link LogRule}s.
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*
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* @return active rules
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* @since 1-alpha1
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*/
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@Getter
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private static final List<LogRule> activeRules = new ArrayList<>();
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/**
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* Constructor.
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*
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@ -109,24 +125,25 @@ public final class Logger {
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*/
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public static void startLoggingThread() {
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if (loggingThread == null) {
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// Logging thread not defined, create and start new one
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loggingThread = Thread.ofPlatform().start(() -> {
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while (true) {
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while (true) { // Run in loop
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// Stop thread when engine is shutting down
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if (Engine.getInstance().isShuttingDown())
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return;
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// Process all log messages
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flushLogMessages();
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// Sleep for whatever has been configured
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try {
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//noinspection BusyWait
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Thread.sleep(EngineConfiguration.getInstance().getLoggerPollingSpeed());
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} catch (Exception ignored) {
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}
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if (Engine.getInstance().isShuttingDown())
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return;
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} catch (Exception ignored) {}
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}
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});
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} else {
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// Restart logging thread if dead
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if (!loggingThread.isAlive())
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loggingThread.start();
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}
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@ -138,12 +155,15 @@ public final class Logger {
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* @since 1-alpha1
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*/
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public static synchronized void flushLogMessages() {
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// Only execute code if queued messages list is not empty
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if (!queuedMessages.isEmpty()) {
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// Clone queued messages and clear original to avoid issues
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//noinspection unchecked
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LinkedList<QueuedLogMessage> queuedMessagesCloned = (LinkedList<QueuedLogMessage>) queuedMessages.clone();
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queuedMessages.clear();
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for (QueuedLogMessage queuedLogMessage : queuedMessagesCloned) {// Check if level is allowed
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// Invoke processLogMessage method for every queued message
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for (QueuedLogMessage queuedLogMessage : queuedMessagesCloned) {
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processLogMessage(queuedLogMessage.getIssuer(), queuedLogMessage.getLevel(), queuedLogMessage.getMessage());
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}
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}
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@ -158,13 +178,22 @@ public final class Logger {
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* @since 1-alpha1
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*/
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private static void processLogMessage(@NotNull LogIssuer issuer, @NotNull LogLevel level, @NotNull String message) {
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// Check if level is allowed
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if (level.compareTo(EngineConfiguration.getInstance().getLoggerLevel()) < 0)
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return;
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// Evaluate all active rules
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for (LogRule rule : activeRules) {
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if (rule.evaluate(issuer, level, message)) {
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if (rule.getType() == LogRuleType.WHITELIST) break; // Continue processing
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if (rule.getType() == LogRuleType.BLACKLIST) return; // Cancel processing
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}
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}
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// Template for now, final log message later
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String base = EngineConfiguration.getInstance().getLoggerTemplate();
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// Execute LoggerImpl#prePlaceholder
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// Invoke LoggerImpl#prePlaceholder
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base = loggerImplementation.prePlaceholder(level, issuer, base);
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// Create list of temporary placeholders
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// Replace placeholders
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base = PlaceholderEngine.getInstance().process(base, temporaryPlaceholders);
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// Execute LoggerImpl#postPlaceholder
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// Invoke LoggerImpl#postPlaceholder
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base = loggerImplementation.postPlaceholder(level, issuer, base);
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// Call event
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if (!issuer.getClazz().getName().equals("de.staropensource.sosengine.slf4j_compat.CompatibilityLogger"))
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new LogEvent().callEvent(level, issuer, message);
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// Print log message
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// Print log message by invoking LoggerImpl#print
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loggerImplementation.print(level, issuer, base);
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}
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@ -207,8 +236,10 @@ public final class Logger {
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if (Engine.getInstance() == null) return;
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if (EngineConfiguration.getInstance().isOptimizeLogging())
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// Optimizations enabled, add to message queue
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queuedMessages.add(new QueuedLogMessage(issuer, level, message));
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else
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// Optimizations disabled, print right away
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processLogMessage(issuer, level, message);
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}
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