org.apache.logging.log4j.message.MapMessage Maven / Gradle / Ivy
/*
* 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.message;
import java.util.AbstractMap;
import java.util.Collections;
import java.util.Map;
import java.util.TreeMap;
import org.apache.logging.log4j.util.BiConsumer;
import org.apache.logging.log4j.util.Chars;
import org.apache.logging.log4j.util.EnglishEnums;
import org.apache.logging.log4j.util.IndexedReadOnlyStringMap;
import org.apache.logging.log4j.util.IndexedStringMap;
import org.apache.logging.log4j.util.MultiFormatStringBuilderFormattable;
import org.apache.logging.log4j.util.PerformanceSensitive;
import org.apache.logging.log4j.util.ReadOnlyStringMap;
import org.apache.logging.log4j.util.SortedArrayStringMap;
import org.apache.logging.log4j.util.StringBuilders;
import org.apache.logging.log4j.util.Strings;
import org.apache.logging.log4j.util.TriConsumer;
/**
* Represents a Message that consists of a Map.
*
* Thread-safety note: the contents of this message can be modified after construction.
* When using asynchronous loggers and appenders it is not recommended to modify this message after the message is
* logged, because it is undefined whether the logged message string will contain the old values or the modified
* values.
*
*
* This class was pulled up from {@link StringMapMessage} to allow for Objects as values.
*
* @param Allow subclasses to use fluent APIs and override methods that return instances of subclasses.
* @param The value type
*/
@PerformanceSensitive("allocation")
@AsynchronouslyFormattable
public class MapMessage, V> implements MultiFormatStringBuilderFormattable {
private static final long serialVersionUID = -5031471831131487120L;
/**
* When set as the format specifier causes the Map to be formatted as XML.
*/
public enum MapFormat {
/** The map should be formatted as XML. */
XML,
/** The map should be formatted as JSON. */
JSON,
/** The map should be formatted the same as documented by {@link AbstractMap#toString()}. */
JAVA,
/**
* The map should be formatted the same as documented by {@link AbstractMap#toString()} but without quotes.
*
* @since 2.11.2
*/
JAVA_UNQUOTED;
/**
* Maps a format name to an {@link MapFormat} while ignoring case.
*
* @param format a MapFormat name
* @return a MapFormat
*/
public static MapFormat lookupIgnoreCase(final String format) {
return XML.name().equalsIgnoreCase(format) ? XML //
: JSON.name().equalsIgnoreCase(format) ? JSON //
: JAVA.name().equalsIgnoreCase(format) ? JAVA //
: JAVA_UNQUOTED.name().equalsIgnoreCase(format) ? JAVA_UNQUOTED //
: null;
}
/**
* All {@code MapFormat} names.
*
* @return All {@code MapFormat} names.
*/
public static String[] names() {
return new String[] {XML.name(), JSON.name(), JAVA.name(), JAVA_UNQUOTED.name()};
}
}
private final IndexedStringMap data;
/**
* Constructs a new instance.
*/
public MapMessage() {
this.data = new SortedArrayStringMap();
}
/**
* Constructs a new instance.
*
* @param initialCapacity the initial capacity.
*/
public MapMessage(final int initialCapacity) {
this.data = new SortedArrayStringMap(initialCapacity);
}
/**
* Constructs a new instance based on an existing {@link Map}.
* @param map The Map.
*/
public MapMessage(final Map map) {
this.data = new SortedArrayStringMap(map);
}
@Override
public String[] getFormats() {
return MapFormat.names();
}
/**
* Returns the data elements as if they were parameters on the logging event.
* @return the data elements.
*/
@Override
public Object[] getParameters() {
final Object[] result = new Object[data.size()];
for (int i = 0; i < data.size(); i++) {
result[i] = data.getValueAt(i);
}
return result;
}
/**
* Returns the message.
* @return the message.
*/
@Override
public String getFormat() {
return Strings.EMPTY;
}
/**
* Returns the message data as an unmodifiable Map.
* @return the message data as an unmodifiable map.
*/
@SuppressWarnings("unchecked")
public Map getData() {
final TreeMap result = new TreeMap<>(); // returned map must be sorted
for (int i = 0; i < data.size(); i++) {
// The Eclipse compiler does not need the typecast to V, but the Oracle compiler sure does.
result.put(data.getKeyAt(i), (V) data.getValueAt(i));
}
return Collections.unmodifiableMap(result);
}
/**
* Returns a read-only view of the message data.
* @return the read-only message data.
*/
public IndexedReadOnlyStringMap getIndexedReadOnlyStringMap() {
return data;
}
/**
* Clear the data.
*/
public void clear() {
data.clear();
}
/**
* Returns {@code true} if this data structure contains the specified key, {@code false} otherwise.
*
* @param key the key whose presence to check. May be {@code null}.
* @return {@code true} if this data structure contains the specified key, {@code false} otherwise
* @since 2.9
*/
public boolean containsKey(final String key) {
return data.containsKey(key);
}
/**
* Adds an item to the data Map.
* @param candidateKey The name of the data item.
* @param value The value of the data item.
*/
public void put(final String candidateKey, final String value) {
if (value == null) {
throw new IllegalArgumentException("No value provided for key " + candidateKey);
}
final String key = toKey(candidateKey);
validate(key, value);
data.putValue(key, value);
}
/**
* Adds all the elements from the specified Map.
* @param map The Map to add.
*/
public void putAll(final Map map) {
for (final Map.Entry entry : map.entrySet()) {
data.putValue(entry.getKey(), entry.getValue());
}
}
/**
* Retrieves the value of the element with the specified key or null if the key is not present.
* @param key The name of the element.
* @return The value of the element or null if the key is not present.
*/
public String get(final String key) {
final Object result = data.getValue(key);
return ParameterFormatter.deepToString(result);
}
/**
* Removes the element with the specified name.
* @param key The name of the element.
* @return The previous value of the element.
*/
public String remove(final String key) {
final String result = get(key);
data.remove(key);
return result;
}
/**
* Formats the Structured data as described in RFC 5424.
*
* @return The formatted String.
*/
public String asString() {
return format((MapFormat) null, new StringBuilder()).toString();
}
/**
* Formats the Structured data as described in RFC 5424.
*
* @param format The format identifier.
* @return The formatted String.
*/
public String asString(final String format) {
try {
return format(EnglishEnums.valueOf(MapFormat.class, format), new StringBuilder()).toString();
} catch (final IllegalArgumentException ex) {
return asString();
}
}
/**
* Performs the given action for each key-value pair in this data structure
* until all entries have been processed or the action throws an exception.
*
* Some implementations may not support structural modifications (adding new elements or removing elements) while
* iterating over the contents. In such implementations, attempts to add or remove elements from the
* {@code BiConsumer}'s {@link BiConsumer#accept(Object, Object)} accept} method may cause a
* {@code ConcurrentModificationException} to be thrown.
*
*
* @param action The action to be performed for each key-value pair in this collection
* @param type of the consumer value
* @throws java.util.ConcurrentModificationException some implementations may not support structural modifications
* to this data structure while iterating over the contents with {@link #forEach(BiConsumer)} or
* {@link #forEach(TriConsumer, Object)}.
* @see ReadOnlyStringMap#forEach(BiConsumer)
* @since 2.9
*/
public void forEach(final BiConsumer action) {
data.forEach(action);
}
/**
* Performs the given action for each key-value pair in this data structure
* until all entries have been processed or the action throws an exception.
*
* The third parameter lets callers pass in a stateful object to be modified with the key-value pairs,
* so the TriConsumer implementation itself can be stateless and potentially reusable.
*
*
* Some implementations may not support structural modifications (adding new elements or removing elements) while
* iterating over the contents. In such implementations, attempts to add or remove elements from the
* {@code TriConsumer}'s {@link TriConsumer#accept(Object, Object, Object) accept} method may cause a
* {@code ConcurrentModificationException} to be thrown.
*
*
* @param action The action to be performed for each key-value pair in this collection
* @param state the object to be passed as the third parameter to each invocation on the specified
* triconsumer
* @param type of the consumer value
* @param type of the third parameter
* @throws java.util.ConcurrentModificationException some implementations may not support structural modifications
* to this data structure while iterating over the contents with {@link #forEach(BiConsumer)} or
* {@link #forEach(TriConsumer, Object)}.
* @see ReadOnlyStringMap#forEach(TriConsumer, Object)
* @since 2.9
*/
public void forEach(final TriConsumer action, final S state) {
data.forEach(action, state);
}
/**
* Formats the Structured data as described in RFC 5424.
*
* @param format The format identifier.
* @return The formatted String.
*/
private StringBuilder format(final MapFormat format, final StringBuilder sb) {
if (format == null) {
appendMap(sb);
} else {
switch (format) {
case XML : {
asXml(sb);
break;
}
case JSON : {
asJson(sb);
break;
}
case JAVA : {
asJava(sb);
break;
}
case JAVA_UNQUOTED:
asJavaUnquoted(sb);
break;
default : {
appendMap(sb);
}
}
}
return sb;
}
/**
* Formats this message as an XML fragment String into the given builder.
*
* @param sb format into this builder.
*/
public void asXml(final StringBuilder sb) {
sb.append("");
}
/**
* Formats the message and return it.
* @return the formatted message.
*/
@Override
public String getFormattedMessage() {
return asString();
}
/**
*
* @param formats
* An array of Strings that provide extra information about how to format the message. MapMessage uses
* the first format specifier it recognizes. The supported formats are XML, JSON, and JAVA. The default
* format is key1="value1" key2="value2" as required by RFC
* 5424 messages.
*
* @return The formatted message.
*/
@Override
public String getFormattedMessage(final String[] formats) {
return format(getFormat(formats), new StringBuilder()).toString();
}
private MapFormat getFormat(final String[] formats) {
if (formats == null || formats.length == 0) {
return null;
}
for (int i = 0; i < formats.length; i++) {
final MapFormat mapFormat = MapFormat.lookupIgnoreCase(formats[i]);
if (mapFormat != null) {
return mapFormat;
}
}
return null;
}
protected void appendMap(final StringBuilder sb) {
for (int i = 0; i < data.size(); i++) {
if (i > 0) {
sb.append(' ');
}
sb.append(data.getKeyAt(i)).append(Chars.EQ).append(Chars.DQUOTE);
ParameterFormatter.recursiveDeepToString(data.getValueAt(i), sb);
sb.append(Chars.DQUOTE);
}
}
protected void asJson(final StringBuilder sb) {
MapMessageJsonFormatter.format(sb, data);
}
protected void asJavaUnquoted(final StringBuilder sb) {
asJava(sb, false);
}
protected void asJava(final StringBuilder sb) {
asJava(sb, true);
}
private void asJava(final StringBuilder sb, final boolean quoted) {
sb.append('{');
for (int i = 0; i < data.size(); i++) {
if (i > 0) {
sb.append(", ");
}
sb.append(data.getKeyAt(i)).append(Chars.EQ);
if (quoted) {
sb.append(Chars.DQUOTE);
}
ParameterFormatter.recursiveDeepToString(data.getValueAt(i), sb);
if (quoted) {
sb.append(Chars.DQUOTE);
}
}
sb.append('}');
}
/**
* Constructs a new instance based on an existing Map.
* @param map The Map.
* @return A new MapMessage
*/
@SuppressWarnings("unchecked")
public M newInstance(final Map map) {
return (M) new MapMessage<>(map);
}
@Override
public String toString() {
return asString();
}
@Override
public void formatTo(final StringBuilder buffer) {
format((MapFormat) null, buffer);
}
@Override
public void formatTo(final String[] formats, final StringBuilder buffer) {
format(getFormat(formats), buffer);
}
@Override
public boolean equals(final Object o) {
if (this == o) {
return true;
}
if (o == null || this.getClass() != o.getClass()) {
return false;
}
final MapMessage that = (MapMessage) o;
return this.data.equals(that.data);
}
@Override
public int hashCode() {
return data.hashCode();
}
/**
* Always returns null.
*
* @return null
*/
@Override
public Throwable getThrowable() {
return null;
}
/**
* Default implementation does nothing.
*
* @since 2.9
*/
protected void validate(final String key, final boolean value) {
// do nothing
}
/**
* Default implementation does nothing.
*
* @since 2.9
*/
protected void validate(final String key, final byte value) {
// do nothing
}
/**
* Default implementation does nothing.
*
* @since 2.9
*/
protected void validate(final String key, final char value) {
// do nothing
}
/**
* Default implementation does nothing.
*
* @since 2.9
*/
protected void validate(final String key, final double value) {
// do nothing
}
/**
* Default implementation does nothing.
*
* @since 2.9
*/
protected void validate(final String key, final float value) {
// do nothing
}
/**
* Default implementation does nothing.
*
* @since 2.9
*/
protected void validate(final String key, final int value) {
// do nothing
}
/**
* Default implementation does nothing.
*
* @since 2.9
*/
protected void validate(final String key, final long value) {
// do nothing
}
/**
* Default implementation does nothing.
*
* @since 2.9
*/
protected void validate(final String key, final Object value) {
// do nothing
}
/**
* Default implementation does nothing.
*
* @since 2.9
*/
protected void validate(final String key, final short value) {
// do nothing
}
/**
* Default implementation does nothing.
*
* @since 2.9
*/
protected void validate(final String key, final String value) {
// do nothing
}
/**
* Allows subclasses to change a candidate key to an actual key.
*
* @param candidateKey The candidate key.
* @return The candidate key.
* @since 2.12
*/
protected String toKey(final String candidateKey) {
return candidateKey;
}
/**
* Adds an item to the data Map.
* @param candidateKey The name of the data item.
* @param value The value of the data item.
* @return this object
* @since 2.9
*/
@SuppressWarnings("unchecked")
public M with(final String candidateKey, final boolean value) {
final String key = toKey(candidateKey);
validate(key, value);
data.putValue(key, value);
return (M) this;
}
/**
* Adds an item to the data Map.
* @param candidateKey The name of the data item.
* @param value The value of the data item.
* @return this object
* @since 2.9
*/
@SuppressWarnings("unchecked")
public M with(final String candidateKey, final byte value) {
final String key = toKey(candidateKey);
validate(key, value);
data.putValue(key, value);
return (M) this;
}
/**
* Adds an item to the data Map.
* @param candidateKey The name of the data item.
* @param value The value of the data item.
* @return this object
* @since 2.9
*/
@SuppressWarnings("unchecked")
public M with(final String candidateKey, final char value) {
final String key = toKey(candidateKey);
validate(key, value);
data.putValue(key, value);
return (M) this;
}
/**
* Adds an item to the data Map.
* @param candidateKey The name of the data item.
* @param value The value of the data item.
* @return this object
* @since 2.9
*/
@SuppressWarnings("unchecked")
public M with(final String candidateKey, final double value) {
final String key = toKey(candidateKey);
validate(key, value);
data.putValue(key, value);
return (M) this;
}
/**
* Adds an item to the data Map.
* @param candidateKey The name of the data item.
* @param value The value of the data item.
* @return this object
* @since 2.9
*/
@SuppressWarnings("unchecked")
public M with(final String candidateKey, final float value) {
final String key = toKey(candidateKey);
validate(key, value);
data.putValue(key, value);
return (M) this;
}
/**
* Adds an item to the data Map.
* @param candidateKey The name of the data item.
* @param value The value of the data item.
* @return this object
* @since 2.9
*/
@SuppressWarnings("unchecked")
public M with(final String candidateKey, final int value) {
final String key = toKey(candidateKey);
validate(key, value);
data.putValue(key, value);
return (M) this;
}
/**
* Adds an item to the data Map.
* @param candidateKey The name of the data item.
* @param value The value of the data item.
* @return this object
* @since 2.9
*/
@SuppressWarnings("unchecked")
public M with(final String candidateKey, final long value) {
final String key = toKey(candidateKey);
validate(key, value);
data.putValue(key, value);
return (M) this;
}
/**
* Adds an item to the data Map.
* @param candidateKey The name of the data item.
* @param value The value of the data item.
* @return this object
* @since 2.9
*/
@SuppressWarnings("unchecked")
public M with(final String candidateKey, final Object value) {
final String key = toKey(candidateKey);
validate(key, value);
data.putValue(key, value);
return (M) this;
}
/**
* Adds an item to the data Map.
* @param candidateKey The name of the data item.
* @param value The value of the data item.
* @return this object
* @since 2.9
*/
@SuppressWarnings("unchecked")
public M with(final String candidateKey, final short value) {
final String key = toKey(candidateKey);
validate(key, value);
data.putValue(key, value);
return (M) this;
}
/**
* Adds an item to the data Map in fluent style.
* @param candidateKey The name of the data item.
* @param value The value of the data item.
* @return {@code this}
*/
@SuppressWarnings("unchecked")
public M with(final String candidateKey, final String value) {
final String key = toKey(candidateKey);
put(key, value);
return (M) this;
}
}