| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache license, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the license for the specific language governing permissions and |
| * limitations under the license. |
| */ |
| package org.apache.logging.log4j.layout.json.template.resolver; |
| |
| import org.apache.logging.log4j.core.LogEvent; |
| import org.apache.logging.log4j.core.util.Throwables; |
| import org.apache.logging.log4j.layout.json.template.util.JsonWriter; |
| |
| /** |
| * Exception root cause resolver. |
| * |
| * Note that this resolver is toggled by {@link |
| * org.apache.logging.log4j.layout.json.template.JsonTemplateLayout.Builder#setStackTraceEnabled(boolean)}. |
| * |
| * @see ExceptionInternalResolverFactory |
| */ |
| final class ExceptionRootCauseResolver implements EventResolver { |
| |
| private static final ExceptionInternalResolverFactory INTERNAL_RESOLVER_FACTORY = |
| new ExceptionInternalResolverFactory() { |
| |
| @Override |
| EventResolver createClassNameResolver() { |
| return (final LogEvent logEvent, final JsonWriter jsonWriter) -> { |
| final Throwable exception = logEvent.getThrown(); |
| if (exception == null) { |
| jsonWriter.writeNull(); |
| } else { |
| final Throwable rootCause = Throwables.getRootCause(exception); |
| final String rootCauseClassName = rootCause.getClass().getCanonicalName(); |
| jsonWriter.writeString(rootCauseClassName); |
| } |
| }; |
| } |
| |
| @Override |
| EventResolver createMessageResolver(final EventResolverContext context) { |
| return (final LogEvent logEvent, final JsonWriter jsonWriter) -> { |
| final Throwable exception = logEvent.getThrown(); |
| if (exception == null) { |
| jsonWriter.writeNull(); |
| } else { |
| final Throwable rootCause = Throwables.getRootCause(exception); |
| final String rootCauseMessage = rootCause.getMessage(); |
| jsonWriter.writeString(rootCauseMessage); |
| } |
| }; |
| } |
| |
| @Override |
| EventResolver createStackTraceStringResolver(final EventResolverContext context) { |
| final StackTraceStringResolver stackTraceStringResolver = |
| new StackTraceStringResolver(context); |
| return (final LogEvent logEvent, final JsonWriter jsonWriter) -> { |
| final Throwable exception = logEvent.getThrown(); |
| if (exception == null) { |
| jsonWriter.writeNull(); |
| } else { |
| final Throwable rootCause = Throwables.getRootCause(exception); |
| stackTraceStringResolver.resolve(rootCause, jsonWriter); |
| } |
| }; |
| } |
| |
| @Override |
| EventResolver createStackTraceObjectResolver(EventResolverContext context) { |
| return (final LogEvent logEvent, final JsonWriter jsonWriter) -> { |
| final Throwable exception = logEvent.getThrown(); |
| if (exception == null) { |
| jsonWriter.writeNull(); |
| } else { |
| final Throwable rootCause = Throwables.getRootCause(exception); |
| context.getStackTraceObjectResolver().resolve(rootCause, jsonWriter); |
| } |
| }; |
| } |
| |
| }; |
| |
| private final boolean stackTraceEnabled; |
| |
| private final EventResolver internalResolver; |
| |
| ExceptionRootCauseResolver( |
| final EventResolverContext context, |
| final TemplateResolverConfig config) { |
| this.stackTraceEnabled = context.isStackTraceEnabled(); |
| this.internalResolver = INTERNAL_RESOLVER_FACTORY |
| .createInternalResolver(context, config); |
| } |
| |
| static String getName() { |
| return "exceptionRootCause"; |
| } |
| |
| @Override |
| public boolean isResolvable() { |
| return stackTraceEnabled; |
| } |
| |
| @Override |
| public boolean isResolvable(final LogEvent logEvent) { |
| return stackTraceEnabled && logEvent.getThrown() != null; |
| } |
| |
| @Override |
| public void resolve( |
| final LogEvent logEvent, |
| final JsonWriter jsonWriter) { |
| internalResolver.resolve(logEvent, jsonWriter); |
| } |
| |
| } |