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Source Code for Apache Log4j Core Implementation
Apache Log4j Core Implementation
provides the functional components of the logging system. Users are free to
create their own plugins and include them in the logging configuration.
Apache Log4j Core is a required module to use Apache Log4j.
Bytecode (Java 8) for Apache Log4j Core Implementation is provided in a separate JAR file like log4j-core-2.14.1.jar.
Source Code files for Apache Log4j API are provided in both binary packge like apache-log4j-2.14.1-bin.zip and source package like apache-log4j-2.14.1-src.zip. You can download them at Apache Log4j Website.
You can also browse Source Code files for Apache Log4j Core Implementation 2.14.1 below.
✍: FYIcenter.com
⏎ org/apache/logging/log4j/core/layout/YamlLayout.java
/* * 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.core.layout; import java.nio.charset.Charset; import java.nio.charset.StandardCharsets; import java.util.HashMap; import java.util.Map; import org.apache.logging.log4j.core.Layout; import org.apache.logging.log4j.core.config.Configuration; import org.apache.logging.log4j.core.config.DefaultConfiguration; import org.apache.logging.log4j.core.config.Node; import org.apache.logging.log4j.core.config.plugins.Plugin; import org.apache.logging.log4j.core.config.plugins.PluginBuilderFactory; import org.apache.logging.log4j.core.util.KeyValuePair; import org.apache.logging.log4j.util.Strings; /** * Appends a series of YAML events as strings serialized as bytes. * * <h3>Encoding</h3> * <p> * Appenders using this layout should have their {@code charset} set to {@code UTF-8} or {@code UTF-16}, otherwise * events containing non ASCII characters could result in corrupted log files. * </p> * <h3>Additional Fields</h3> * <p> * This property allows addition of custom fields into generated JSON. * {@code <YamlLayout><KeyValuePair key="foo" value="bar"/></YamlLayout>} inserts {@code foo: "bar"} directly * into YAML output. Supports Lookup expressions. * </p> */ @Plugin(name = "YamlLayout", category = Node.CATEGORY, elementType = Layout.ELEMENT_TYPE, printObject = true) public final class YamlLayout extends AbstractJacksonLayout { private static final String DEFAULT_FOOTER = Strings.EMPTY; private static final String DEFAULT_HEADER = Strings.EMPTY; static final String CONTENT_TYPE = "application/yaml"; public static class Builder<B extends Builder<B>> extends AbstractJacksonLayout.Builder<B> implements org.apache.logging.log4j.core.util.Builder<YamlLayout> { public Builder() { setCharset(StandardCharsets.UTF_8); } @Override public YamlLayout build() { final String headerPattern = toStringOrNull(getHeader()); final String footerPattern = toStringOrNull(getFooter()); return new YamlLayout(getConfiguration(), isLocationInfo(), isProperties(), isComplete(), isCompact(), getEventEol(), getEndOfLine(), headerPattern, footerPattern, getCharset(), isIncludeStacktrace(), isStacktraceAsString(), isIncludeNullDelimiter(), isIncludeTimeMillis(), getAdditionalFields()); } } /** * @deprecated Use {@link #newBuilder()} instead */ @Deprecated protected YamlLayout(final Configuration config, final boolean locationInfo, final boolean properties, final boolean complete, final boolean compact, final boolean eventEol, final String headerPattern, final String footerPattern, final Charset charset, final boolean includeStacktrace) { super(config, new JacksonFactory.YAML(includeStacktrace, false).newWriter(locationInfo, properties, compact), charset, compact, complete, eventEol, null, PatternLayout.newSerializerBuilder().setConfiguration(config).setPattern(headerPattern).setDefaultPattern(DEFAULT_HEADER).build(), PatternLayout.newSerializerBuilder().setConfiguration(config).setPattern(footerPattern).setDefaultPattern(DEFAULT_FOOTER).build(), false, null); } private YamlLayout(final Configuration config, final boolean locationInfo, final boolean properties, final boolean complete, final boolean compact, final boolean eventEol, final String endOfLine, final String headerPattern, final String footerPattern, final Charset charset, final boolean includeStacktrace, final boolean stacktraceAsString, final boolean includeNullDelimiter, final boolean includeTimeMillis, final KeyValuePair[] additionalFields) { super(config, new JacksonFactory.YAML(includeStacktrace, stacktraceAsString) .newWriter(locationInfo, properties, compact, includeTimeMillis), charset, compact, complete, eventEol, endOfLine, PatternLayout.newSerializerBuilder().setConfiguration(config).setPattern(headerPattern).setDefaultPattern(DEFAULT_HEADER).build(), PatternLayout.newSerializerBuilder().setConfiguration(config).setPattern(footerPattern).setDefaultPattern(DEFAULT_FOOTER).build(), includeNullDelimiter, additionalFields); } /** * Returns appropriate YAML header. * * @return a byte array containing the header, opening the YAML array. */ @Override public byte[] getHeader() { if (!this.complete) { return null; } final StringBuilder buf = new StringBuilder(); final String str = serializeToString(getHeaderSerializer()); if (str != null) { buf.append(str); } buf.append(this.eol); return getBytes(buf.toString()); } /** * Returns appropriate YAML footer. * * @return a byte array containing the footer, closing the YAML array. */ @Override public byte[] getFooter() { if (!this.complete) { return null; } final StringBuilder buf = new StringBuilder(); buf.append(this.eol); final String str = serializeToString(getFooterSerializer()); if (str != null) { buf.append(str); } buf.append(this.eol); return getBytes(buf.toString()); } @Override public Map<String, String> getContentFormat() { final Map<String, String> result = new HashMap<>(); result.put("version", "2.0"); return result; } /** * @return The content type. */ @Override public String getContentType() { return CONTENT_TYPE + "; charset=" + this.getCharset(); } /** * Creates a YAML Layout. * * @param config * The plugin configuration. * @param locationInfo * If "true", includes the location information in the generated YAML. * @param properties * If "true", includes the thread context map in the generated YAML. * @param headerPattern * The header pattern, defaults to {@code ""} if null. * @param footerPattern * The header pattern, defaults to {@code ""} if null. * @param charset * The character set to use, if {@code null}, uses "UTF-8". * @param includeStacktrace * If "true", includes the stacktrace of any Throwable in the generated YAML, defaults to "true". * @return A YAML Layout. * * @deprecated Use {@link #newBuilder()} instead */ @Deprecated public static AbstractJacksonLayout createLayout( final Configuration config, final boolean locationInfo, final boolean properties, final String headerPattern, final String footerPattern, final Charset charset, final boolean includeStacktrace) { return new YamlLayout(config, locationInfo, properties, false, false, true, null, headerPattern, footerPattern, charset, includeStacktrace, false, false, false, null); } @PluginBuilderFactory public static <B extends Builder<B>> B newBuilder() { return new Builder<B>().asBuilder(); } /** * Creates a YAML Layout using the default settings. Useful for testing. * * @return A YAML Layout. */ public static AbstractJacksonLayout createDefaultLayout() { return new YamlLayout(new DefaultConfiguration(), false, false, false, false, false, null, DEFAULT_HEADER, DEFAULT_FOOTER, StandardCharsets.UTF_8, true, false, false, false, null); } }
⏎ org/apache/logging/log4j/core/layout/YamlLayout.java
Or download all of them as a single archive file:
File name: log4j-core-2.14.1-sources.jar File size: 1281358 bytes Release date: 2021-03-06 Download
⇒ Source Code for Apache Log4j JDK Logging Adapter
⇐ Source Code for Apache Log4j API
2015-11-03, 117192👍, 0💬
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