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- /*
- * SonarQube
- * Copyright (C) 2009-2024 SonarSource SA
- * mailto:info AT sonarsource DOT com
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 3 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
- package org.sonar.process.logging;
-
- import ch.qos.logback.classic.spi.ILoggingEvent;
- import ch.qos.logback.classic.spi.IThrowableProxy;
- import ch.qos.logback.classic.spi.StackTraceElementProxy;
- import ch.qos.logback.core.CoreConstants;
- import ch.qos.logback.core.LayoutBase;
- import com.google.gson.stream.JsonWriter;
- import java.io.IOException;
- import java.io.StringWriter;
- import java.time.Instant;
- import java.time.ZoneId;
- import java.time.format.DateTimeFormatter;
- import java.util.List;
- import java.util.Locale;
- import java.util.Map;
- import java.util.regex.Pattern;
- import org.apache.commons.lang3.StringUtils;
-
- import static java.lang.String.format;
- import static java.util.Objects.requireNonNull;
-
- /**
- * Formats logs in JSON.
- * <p>
- * Strongly inspired by https://github.com/qos-ch/logback/blob/master/logback-classic/src/main/java/ch/qos/logback/classic/html/DefaultThrowableRenderer.java
- */
- public class LogbackJsonLayout extends LayoutBase<ILoggingEvent> {
-
- static final DateTimeFormatter DATE_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSSXXX")
- .withLocale(Locale.US)
- .withZone(ZoneId.systemDefault());
- private static final Pattern NEWLINE_REGEXP = Pattern.compile("\n");
-
- private final String processKey;
- private final String nodeName;
- private final List<String> exclusions;
-
- public LogbackJsonLayout(String processKey, String nodeName) {
- this(processKey, nodeName, List.of());
- }
-
- public LogbackJsonLayout(String processKey, String nodeName, List<String> exclusions) {
- this.processKey = requireNonNull(processKey);
- this.nodeName = nodeName;
- this.exclusions = exclusions;
- }
-
- String getProcessKey() {
- return processKey;
- }
-
- @Override
- public String doLayout(ILoggingEvent event) {
- StringWriter output = new StringWriter();
- try (JsonWriter json = new JsonWriter(output)) {
- json.beginObject();
- if (!"".equals(nodeName)) {
- json.name("nodename").value(nodeName);
- }
- json.name("process").value(processKey);
- for (Map.Entry<String, String> entry : event.getMDCPropertyMap().entrySet()) {
- if (entry.getValue() != null && !exclusions.contains(entry.getKey())) {
- json.name(entry.getKey()).value(entry.getValue());
- }
- }
- json
- .name("timestamp").value(DATE_FORMATTER.format(Instant.ofEpochMilli(event.getTimeStamp())))
- .name("severity").value(event.getLevel().toString())
- .name("logger").value(event.getLoggerName())
- .name("message").value(NEWLINE_REGEXP.matcher(event.getFormattedMessage()).replaceAll("\r"));
- IThrowableProxy tp = event.getThrowableProxy();
- if (tp != null) {
- json.name("stacktrace").beginArray();
- int nbOfTabs = 0;
- while (tp != null) {
- printFirstLine(json, tp, nbOfTabs);
- render(json, tp, nbOfTabs);
- tp = tp.getCause();
- nbOfTabs++;
- }
- json.endArray();
-
- }
- json.endObject();
- } catch (Exception e) {
- e.printStackTrace();
- throw new IllegalStateException("BUG - fail to create JSON", e);
- }
- output.write(System.lineSeparator());
- return output.toString();
- }
-
- private static void render(JsonWriter output, IThrowableProxy tp, int nbOfTabs) throws IOException {
- String tabs = StringUtils.repeat("\t", nbOfTabs);
- int commonFrames = tp.getCommonFrames();
- StackTraceElementProxy[] stepArray = tp.getStackTraceElementProxyArray();
-
- for (int i = 0; i < stepArray.length - commonFrames; i++) {
- StackTraceElementProxy step = stepArray[i];
- output.value(tabs + step.toString());
- }
-
- if (commonFrames > 0) {
- output.value(tabs + "... " + commonFrames + " common frames omitted");
- }
-
- for (IThrowableProxy suppressed : tp.getSuppressed()) {
- output.value(format("%sSuppressed: %s: %s", tabs, suppressed.getClassName(), suppressed.getMessage()));
- render(output, suppressed, nbOfTabs + 1);
- }
- }
-
- private static void printFirstLine(JsonWriter output, IThrowableProxy tp, int nbOfTabs) throws IOException {
- String tabs = StringUtils.repeat("\t", nbOfTabs);
- int commonFrames = tp.getCommonFrames();
- if (commonFrames > 0) {
- output.value(tabs + CoreConstants.CAUSED_BY);
- }
- output.value(tabs + tp.getClassName() + ": " + tp.getMessage());
- }
- }
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