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- /*
- * Copyright (c) 2006-2017 DMDirc Developers
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
- * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
- * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
- * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
- * OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
- * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
- package com.dmdirc.logger;
-
- import com.dmdirc.events.ErrorEvent;
- import com.dmdirc.events.FatalProgramErrorEvent;
- import com.dmdirc.events.NonFatalProgramErrorEvent;
- import com.dmdirc.events.ProgramErrorDeletedEvent;
- import com.dmdirc.events.ProgramErrorEvent;
- import com.dmdirc.interfaces.EventBus;
- import com.dmdirc.util.EventUtils;
- import com.dmdirc.util.LogUtils;
-
- import ch.qos.logback.classic.spi.ILoggingEvent;
-
- import java.time.LocalDateTime;
- import java.util.Collection;
- import java.util.Collections;
- import java.util.HashSet;
- import java.util.Set;
- import java.util.concurrent.CopyOnWriteArraySet;
-
- import javax.annotation.Nullable;
- import javax.inject.Inject;
- import javax.inject.Singleton;
-
- import org.slf4j.Marker;
-
- import net.engio.mbassy.listener.Handler;
-
- /**
- * Listens for {@link ErrorEvent}s, creates {@link ProgramError}s and raises {@link
- * ProgramErrorEvent}s.
- */
- @Singleton
- public class ProgramErrorManager {
-
- /** The event bus to listen for errors on. */
- private final EventBus eventBus;
- /** The current list of errors. */
- private final Set<ProgramError> errors;
- /** Factory to create {@link ProgramError}s. */
- private final ProgramErrorFactory programErrorFactory;
-
- @Inject
- public ProgramErrorManager(final EventBus eventBus,
- final ProgramErrorFactory programErrorFactory) {
- this.eventBus = eventBus;
- this.programErrorFactory = programErrorFactory;
- errors = new CopyOnWriteArraySet<>();
- }
-
- /**
- * Initialises the error manager. Must be called before logging will start.
- */
- public void initialise() {
- eventBus.subscribe(this);
- }
-
- void handle(final ILoggingEvent event) {
- final ProgramError error = addError(LogUtils.getErrorLevel(event.getLevel()),
- event.getFormattedMessage(), LogUtils.getThrowable(event),
- isAppError(event.getMarker()));
- handleErrorEvent(error);
- }
-
- private boolean isAppError(@Nullable final Marker marker) {
- return marker != null
- && (marker == LogUtils.APP_ERROR || marker == LogUtils.FATAL_APP_ERROR);
- }
-
- void handleErrorEvent(final ProgramError error) {
- if (error.getLevel() == ErrorLevel.FATAL) {
- eventBus.publish(new FatalProgramErrorEvent(error));
- } else {
- eventBus.publish(new NonFatalProgramErrorEvent(error));
- }
- }
-
- @Handler(priority = EventUtils.PRIORITY_LOWEST)
- @SuppressWarnings({"UseOfSystemOutOrSystemErr", "ThrowableResultOfMethodCallIgnored"})
- void handleProgramError(final NonFatalProgramErrorEvent event) {
- if (!event.isHandled()) {
- System.err.println(event.getError().getMessage());
- event.getError().getThrowableAsString().ifPresent(System.err::println);
- }
- }
-
- /**
- * Adds a new error to the manager with the specified details.
- *
- * @param level The severity of the error
- * @param message The error message
- * @param throwable The exception that caused the error, if any.
- * @param appError Whether or not this is an application error
- *
- * @since 0.6.3m1
- */
- private ProgramError addError(final ErrorLevel level, final String message,
- final Throwable throwable, final boolean appError) {
-
- final ProgramError error = programErrorFactory.create(level, message, throwable,
- LocalDateTime.now(), appError);
- errors.add(error);
- return error;
- }
-
- /**
- * Called when an error needs to be deleted from the list.
- *
- * @param error ProgramError that changed
- */
- public void deleteError(final ProgramError error) {
- errors.remove(error);
- eventBus.publishAsync(new ProgramErrorDeletedEvent(error));
- }
-
- /**
- * Deletes all errors from the manager.
- *
- * @since 0.6.3m1
- */
- public void deleteAll() {
- final Collection<ProgramError> errorsCopy = new HashSet<>(errors);
- errors.clear();
- errorsCopy.stream().map(ProgramErrorDeletedEvent::new).forEach(eventBus::publish);
- }
-
- /**
- * Returns the list of program errors.
- *
- * @return Program error list
- */
- public Set<ProgramError> getErrors() {
- return Collections.unmodifiableSet(errors);
- }
- }
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