You already declare and throw ParseException, so I would use ParseException.

Gary



On Sun, Jul 23, 2017 at 11:25 AM, Mikael Ståldal <[email protected]> wrote:

> Do you have another suggestion?
>
>
> On 2017-07-23 05:01, Gary Gregory wrote:
>
>> -1 to throw new RuntimeException(e)
>>
>> Gary
>>
>> On Jul 22, 2017 13:48, <[email protected]> wrote:
>>
>> Repository: logging-log4j2
>> Updated Branches:
>>    refs/heads/LOG4J2-1986 [created] c4814a873
>>
>>
>> LOG4J2-1986 Public API for parsing the output from
>> JsonLayout/XmlLayout/YamlLayout
>> into a LogEvent
>>
>>
>> Project: http://git-wip-us.apache.org/repos/asf/logging-log4j2/repo
>> Commit: http://git-wip-us.apache.org/repos/asf/logging-log4j2/
>> commit/c4814a87
>> Tree: http://git-wip-us.apache.org/repos/asf/logging-log4j2/tree/c4814a87
>> Diff: http://git-wip-us.apache.org/repos/asf/logging-log4j2/diff/c4814a87
>>
>> Branch: refs/heads/LOG4J2-1986
>> Commit: c4814a8730eb24bdf89cf23c89b4a957b8418ba5
>> Parents: eea873e
>> Author: Mikael Ståldal <[email protected]>
>> Authored: Sat Jul 22 22:48:24 2017 +0200
>> Committer: Mikael Ståldal <[email protected]>
>> Committed: Sat Jul 22 22:48:24 2017 +0200
>>
>> ----------------------------------------------------------------------
>>   .../parser/AbstractJacksonLogEventParser.java   |  85 +++++++++++++++
>>   .../log4j/core/parser/JsonLogEventParser.java   |  32 ++++++
>>   .../log4j/core/parser/LogEventParser.java       |  64 ++++++++++++
>>   .../log4j/core/parser/ParseException.java       |  34 ++++++
>>   .../log4j/core/parser/TextLogEventParser.java   |  50 +++++++++
>>   .../log4j/core/parser/XmlLogEventParser.java    |  32 ++++++
>>   .../log4j/core/parser/YamlLogEventParser.java   |  33 ++++++
>>   .../logging/log4j/core/parser/package-info.java |  20 ++++
>>   .../core/parser/JsonLogEventParserTest.java     | 103
>> +++++++++++++++++++
>>   src/changes/changes.xml                         |   3 +
>>   10 files changed, 456 insertions(+)
>> ----------------------------------------------------------------------
>>
>>
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> c4814a87/log4j-core/src/main/java/org/apache/logging/log4j/core/parser/
>> AbstractJacksonLogEventParser.java
>> ----------------------------------------------------------------------
>> diff --git a/log4j-core/src/main/java/org/apache/logging/log4j/core/par
>> ser/
>> AbstractJacksonLogEventParser.java b/log4j-core/src/main/java/
>> org/apache/logging/log4j/core/parser/AbstractJacksonLogEventParser.java
>> new file mode 100644
>> index 0000000..8b00e57
>> --- /dev/null
>> +++ b/log4j-core/src/main/java/org/apache/logging/log4j/core/parser/
>> AbstractJacksonLogEventParser.java
>> @@ -0,0 +1,85 @@
>> +/*
>> + * 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.parser;
>> +
>> +import com.fasterxml.jackson.core.JsonProcessingException;
>> +import com.fasterxml.jackson.databind.ObjectReader;
>> +import org.apache.logging.log4j.core.LogEvent;
>> +import org.apache.logging.log4j.core.impl.Log4jLogEvent;
>> +import org.apache.logging.log4j.core.jackson.Log4jJsonObjectMapper;
>> +
>> +import java.io.IOException;
>> +import java.io.InputStream;
>> +import java.io.Reader;
>> +
>> +class AbstractJacksonLogEventParser implements TextLogEventParser {
>> +    final ObjectReader objectReader;
>> +
>> +    AbstractJacksonLogEventParser(ObjectReader objectReader) {
>> +        this.objectReader = objectReader;
>> +    }
>> +
>> +    @Override
>> +    public LogEvent parseFrom(InputStream input) throws IOException,
>> ParseException {
>> +        try {
>> +            return objectReader.readValue(input);
>> +        } catch (JsonProcessingException e) {
>> +            throw new ParseException(e);
>> +        }
>> +    }
>> +
>> +    @Override
>> +    public LogEvent parseFrom(Reader input) throws IOException,
>> ParseException {
>> +        try {
>> +            return objectReader.readValue(input);
>> +        } catch (JsonProcessingException e) {
>> +            throw new ParseException(e);
>> +        }
>> +    }
>> +
>> +    @Override
>> +    public LogEvent parseFrom(String input) throws ParseException {
>> +        try {
>> +            return objectReader.readValue(input);
>> +        } catch (JsonProcessingException e) {
>> +            throw new ParseException(e);
>> +        } catch (IOException e) {
>> +            throw new RuntimeException(e);
>> +        }
>> +    }
>> +
>> +    @Override
>> +    public LogEvent parseFrom(byte[] input) throws ParseException {
>> +        try {
>> +            return objectReader.readValue(input);
>> +        } catch (JsonProcessingException e) {
>> +            throw new ParseException(e);
>> +        } catch (IOException e) {
>> +            throw new RuntimeException(e);
>> +        }
>> +    }
>> +
>> +    @Override
>> +    public LogEvent parseFrom(byte[] input, int offset, int length)
>> throws
>> ParseException {
>> +        try {
>> +            return objectReader.readValue(input, offset, length);
>> +        } catch (JsonProcessingException e) {
>> +            throw new ParseException(e);
>> +        } catch (IOException e) {
>> +            throw new RuntimeException(e);
>> +        }
>> +    }
>> +}
>>
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> c4814a87/log4j-core/src/main/java/org/apache/logging/log4j/core/parser/
>> JsonLogEventParser.java
>> ----------------------------------------------------------------------
>> diff --git a/log4j-core/src/main/java/org/apache/logging/log4j/core/par
>> ser/JsonLogEventParser.java
>> b/log4j-core/src/main/java/org/apache/logging/log4j/core/
>> parser/JsonLogEventParser.java
>> new file mode 100644
>> index 0000000..218de0b
>> --- /dev/null
>> +++ b/log4j-core/src/main/java/org/apache/logging/log4j/core/
>> parser/JsonLogEventParser.java
>> @@ -0,0 +1,32 @@
>> +/*
>> + * 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.parser;
>> +
>> +import org.apache.logging.log4j.core.LogEvent;
>> +import org.apache.logging.log4j.core.impl.Log4jLogEvent;
>> +import org.apache.logging.log4j.core.jackson.Log4jJsonObjectMapper;
>> +
>> +/**
>> + * Parse the output from JsonLayout layout into instances of {@link
>> LogEvent}.
>> + */
>> +public class JsonLogEventParser extends AbstractJacksonLogEventParser {
>> +
>> +    public JsonLogEventParser() {
>> +        super(new Log4jJsonObjectMapper().reader
>> For(Log4jLogEvent.class));
>> +    }
>> +
>> +}
>>
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> c4814a87/log4j-core/src/main/java/org/apache/logging/log4j/
>> core/parser/LogEventParser.java
>> ----------------------------------------------------------------------
>> diff --git a/log4j-core/src/main/java/org/apache/logging/log4j/core/par
>> ser/LogEventParser.java
>> b/log4j-core/src/main/java/org/apache/logging/log4j/core/
>> parser/LogEventParser.java
>> new file mode 100644
>> index 0000000..88e84fb
>> --- /dev/null
>> +++ b/log4j-core/src/main/java/org/apache/logging/log4j/core/
>> parser/LogEventParser.java
>> @@ -0,0 +1,64 @@
>> +/*
>> + * 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.parser;
>> +
>> +import org.apache.logging.log4j.core.LogEvent;
>> +
>> +import java.io.IOException;
>> +import java.io.InputStream;
>> +
>> +/**
>> + * Parse the output from a layout into instances of {@link LogEvent}.
>> + */
>> +public interface LogEventParser {
>> +
>> +    /**
>> +     * Parse from an InputStream. The input stream may contain multiple
>> log events.
>> +     * This method will read one log event and leave the stream open and
>> positioned to read the
>> +     * next log event.
>> +     *
>> +     * @param input  the input stream
>> +     *
>> +     * @return the parsed LogEvent, or {@literal null} of end of input is
>> reached.
>> +     * @throws IOException if unable to read from the input
>> +     * @throws ParseException if the input is malformed and cannot be
>> parsed as a LogEvent
>> +     */
>> +    LogEvent parseFrom(InputStream input) throws IOException,
>> ParseException;
>> +
>> +    /**
>> +     * Parse from a byte array, which is expected to contain exactly one
>> log event.
>> +     *
>> +     * @param input  the byte array
>> +     *
>> +     * @return the parsed LogEvent, never {@literal null}.
>> +     * @throws ParseException if the input is malformed and cannot be
>> parsed as a LogEvent
>> +     */
>> +    LogEvent parseFrom(byte[] input) throws ParseException;
>> +
>> +    /**
>> +     * Parse from a specified range of a byte array. The specified range
>> is expected to contain
>> +     * exactly one log event.
>> +     *
>> +     * @param input  the byte array
>> +     * @param offset  the initial offset
>> +     * @param length  the length
>> +     *
>> +     * @return the parsed LogEvent, never {@literal null}.
>> +     * @throws ParseException if the input is malformed and cannot be
>> parsed as a LogEvent
>> +     */
>> +    LogEvent parseFrom(byte[] input, int offset, int length) throws
>> ParseException;
>> +}
>>
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> c4814a87/log4j-core/src/main/java/org/apache/logging/log4j/
>> core/parser/ParseException.java
>> ----------------------------------------------------------------------
>> diff --git a/log4j-core/src/main/java/org/apache/logging/log4j/core/par
>> ser/ParseException.java
>> b/log4j-core/src/main/java/org/apache/logging/log4j/core/
>> parser/ParseException.java
>> new file mode 100644
>> index 0000000..8f5fa54
>> --- /dev/null
>> +++ b/log4j-core/src/main/java/org/apache/logging/log4j/core/
>> parser/ParseException.java
>> @@ -0,0 +1,34 @@
>> +/*
>> + * 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.parser;
>> +
>> +/**
>> + * Thrown when the input cannot be parsed.
>> + */
>> +public class ParseException extends Exception {
>> +    public ParseException(String message) {
>> +        super(message);
>> +    }
>> +
>> +    public ParseException(String message, Throwable cause) {
>> +        super(message, cause);
>> +    }
>> +
>> +    public ParseException(Throwable cause) {
>> +        super(cause);
>> +    }
>> +}
>>
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> c4814a87/log4j-core/src/main/java/org/apache/logging/log4j/core/parser/
>> TextLogEventParser.java
>> ----------------------------------------------------------------------
>> diff --git a/log4j-core/src/main/java/org/apache/logging/log4j/core/par
>> ser/TextLogEventParser.java
>> b/log4j-core/src/main/java/org/apache/logging/log4j/core/
>> parser/TextLogEventParser.java
>> new file mode 100644
>> index 0000000..3428024
>> --- /dev/null
>> +++ b/log4j-core/src/main/java/org/apache/logging/log4j/core/
>> parser/TextLogEventParser.java
>> @@ -0,0 +1,50 @@
>> +/*
>> + * 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.parser;
>> +
>> +import org.apache.logging.log4j.core.LogEvent;
>> +
>> +import java.io.IOException;
>> +import java.io.Reader;
>> +
>> +/**
>> + * Parse the output from a text based layout into instances of {@link
>> LogEvent}.
>> + */
>> +public interface TextLogEventParser extends LogEventParser {
>> +    /**
>> +     * Parse from a Reader. The reader may contain multiple log events.
>> +     * This method will read one log event and leave the reader open and
>> positioned to read the
>> +     * next log event.
>> +     *
>> +     * @param input  the reader
>> +     *
>> +     * @return the parsed LogEvent, or {@literal null} of end of input is
>> reached.
>> +     * @throws IOException if unable to read from the input
>> +     * @throws ParseException if the input is malformed and cannot be
>> parsed as a LogEvent
>> +     */
>> +    LogEvent parseFrom(Reader input) throws IOException, ParseException;
>> +
>> +    /**
>> +     * Parse from a String, which is expected to contain exactly one log
>> event.
>> +     *
>> +     * @param input  the string
>> +     *
>> +     * @return the parsed LogEvent
>> +     * @throws ParseException if the input is malformed and cannot be
>> parsed as a LogEvent
>> +     */
>> +    LogEvent parseFrom(String input) throws ParseException;
>> +}
>>
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> c4814a87/log4j-core/src/main/java/org/apache/logging/log4j/
>> core/parser/XmlLogEventParser.java
>> ----------------------------------------------------------------------
>> diff --git a/log4j-core/src/main/java/org/apache/logging/log4j/core/par
>> ser/XmlLogEventParser.java
>> b/log4j-core/src/main/java/org/apache/logging/log4j/core/
>> parser/XmlLogEventParser.java
>> new file mode 100644
>> index 0000000..597e70b
>> --- /dev/null
>> +++ b/log4j-core/src/main/java/org/apache/logging/log4j/core/
>> parser/XmlLogEventParser.java
>> @@ -0,0 +1,32 @@
>> +/*
>> + * 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.parser;
>> +
>> +import org.apache.logging.log4j.core.LogEvent;
>> +import org.apache.logging.log4j.core.impl.Log4jLogEvent;
>> +import org.apache.logging.log4j.core.jackson.Log4jXmlObjectMapper;
>> +
>> +/**
>> + * Parse the output from XmlLayout layout into instances of {@link
>> LogEvent}.
>> + */
>> +public class XmlLogEventParser extends AbstractJacksonLogEventParser {
>> +
>> +    public XmlLogEventParser() {
>> +        super(new Log4jXmlObjectMapper().readerF
>> or(Log4jLogEvent.class));
>> +    }
>> +
>> +}
>>
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> c4814a87/log4j-core/src/main/java/org/apache/logging/log4j/core/parser/
>> YamlLogEventParser.java
>> ----------------------------------------------------------------------
>> diff --git a/log4j-core/src/main/java/org/apache/logging/log4j/core/par
>> ser/YamlLogEventParser.java
>> b/log4j-core/src/main/java/org/apache/logging/log4j/core/
>> parser/YamlLogEventParser.java
>> new file mode 100644
>> index 0000000..59b3463
>> --- /dev/null
>> +++ b/log4j-core/src/main/java/org/apache/logging/log4j/core/
>> parser/YamlLogEventParser.java
>> @@ -0,0 +1,33 @@
>> +/*
>> + * 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.parser;
>> +
>> +import org.apache.logging.log4j.core.LogEvent;
>> +import org.apache.logging.log4j.core.impl.Log4jLogEvent;
>> +import org.apache.logging.log4j.core.jackson.Log4jXmlObjectMapper;
>> +import org.apache.logging.log4j.core.jackson.Log4jYamlObjectMapper;
>> +
>> +/**
>> + * Parse the output from YamlLayout layout into instances of {@link
>> LogEvent}.
>> + */
>> +public class YamlLogEventParser extends AbstractJacksonLogEventParser {
>> +
>> +    public YamlLogEventParser() {
>> +        super(new Log4jYamlObjectMapper().reader
>> For(Log4jLogEvent.class));
>> +    }
>> +
>> +}
>>
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> c4814a87/log4j-core/src/main/java/org/apache/logging/log4j/
>> core/parser/package-info.java
>> ----------------------------------------------------------------------
>> diff --git a/log4j-core/src/main/java/org/apache/logging/log4j/core/par
>> ser/package-info.java
>> b/log4j-core/src/main/java/org/apache/logging/log4j/core/
>> parser/package-info.java
>> new file mode 100644
>> index 0000000..3506570
>> --- /dev/null
>> +++ b/log4j-core/src/main/java/org/apache/logging/log4j/core/
>> parser/package-info.java
>> @@ -0,0 +1,20 @@
>> +/*
>> + * 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.
>> + */
>> +/**
>> + * Parsers for the output of various layouts.
>> + */
>> +package org.apache.logging.log4j.core.parser;
>>
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> c4814a87/log4j-core/src/test/java/org/apache/logging/log4j/core/parser/
>> JsonLogEventParserTest.java
>> ----------------------------------------------------------------------
>> diff --git a/log4j-core/src/test/java/org/apache/logging/log4j/core/
>> parser/JsonLogEventParserTest.java b/log4j-core/src/test/java/
>> org/apache/logging/log4j/core/parser/JsonLogEventParserTest.java
>> new file mode 100644
>> index 0000000..5684602
>> --- /dev/null
>> +++ b/log4j-core/src/test/java/org/apache/logging/log4j/core/
>> parser/JsonLogEventParserTest.java
>> @@ -0,0 +1,103 @@
>> +/*
>> + * 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.parser;
>> +
>> +import org.apache.logging.log4j.core.LogEvent;
>> +import org.junit.Before;
>> +import org.junit.Test;
>> +
>> +import static org.junit.Assert.assertEquals;
>> +import static org.junit.Assert.assertNotNull;
>> +
>> +public class JsonLogEventParserTest {
>> +
>> +    private JsonLogEventParser parser;
>> +
>> +    private static final String JSON = "{\n" +
>> +            "  \"timeMillis\" : 1493121664118,\n" +
>> +            "  \"thread\" : \"main\",\n" +
>> +            "  \"level\" : \"INFO\",\n" +
>> +            "  \"loggerName\" : \"HelloWorld\",\n" +
>> +            "  \"marker\" : {\n" +
>> +            "    \"name\" : \"child\",\n" +
>> +            "    \"parents\" : [ {\n" +
>> +            "      \"name\" : \"parent\",\n" +
>> +            "      \"parents\" : [ {\n" +
>> +            "        \"name\" : \"grandparent\"\n" +
>> +            "      } ]\n" +
>> +            "    } ]\n" +
>> +            "  },\n" +
>> +            "  \"message\" : \"Hello, world!\",\n" +
>> +            "  \"thrown\" : {\n" +
>> +            "    \"commonElementCount\" : 0,\n" +
>> +            "    \"name\" : \"java.lang.RuntimeException\",\n" +
>> +            "    \"extendedStackTrace\" : [ {\n" +
>> +            "      \"class\" : \"logtest.Main\",\n" +
>> +            "      \"method\" : \"main\",\n" +
>> +            "      \"file\" : \"Main.java\",\n" +
>> +            "      \"line\" : 29,\n" +
>> +            "      \"exact\" : true,\n" +
>> +            "      \"location\" : \"classes/\",\n" +
>> +            "      \"version\" : \"?\"\n" +
>> +            "    } ]\n" +
>> +            "  },\n" +
>> +            "  \"contextStack\" : [ \"one\", \"two\" ],\n" +
>> +            "  \"endOfBatch\" : false,\n" +
>> +            "  \"loggerFqcn\" :
>> \"org.apache.logging.log4j.spi.AbstractLogger\",\n"
>> +
>> +            "  \"contextMap\" : {\n" +
>> +            "    \"bar\" : \"BAR\",\n" +
>> +            "    \"foo\" : \"FOO\"\n" +
>> +            "  },\n" +
>> +            "  \"threadId\" : 1,\n" +
>> +            "  \"threadPriority\" : 5,\n" +
>> +            "  \"source\" : {\n" +
>> +            "    \"class\" : \"logtest.Main\",\n" +
>> +            "    \"method\" : \"main\",\n" +
>> +            "    \"file\" : \"Main.java\",\n" +
>> +            "    \"line\" : 29\n" +
>> +            "  }\n" +
>> +            "}";
>> +
>> +    @Before
>> +    public void setup() {
>> +        parser = new JsonLogEventParser();
>> +    }
>> +
>> +    @Test
>> +    public void testString() throws ParseException {
>> +        LogEvent logEvent = parser.parseFrom(JSON);
>> +        assertNotNull(logEvent);
>> +        assertEquals("HelloWorld", logEvent.getLoggerName());
>> +        // TODO assert more here
>> +    }
>> +
>> +    @Test(expected = ParseException.class)
>> +    public void testStringEmpty() throws ParseException {
>> +        parser.parseFrom("");
>> +    }
>> +
>> +    @Test(expected = ParseException.class)
>> +    public void testStringInvalidJson() throws ParseException {
>> +        parser.parseFrom("foobar");
>> +    }
>> +
>> +    @Test(expected = ParseException.class)
>> +    public void testStringInvalidProperty() throws ParseException {
>> +        parser.parseFrom("{\"foo\":\"bar\"}");
>> +    }
>> +
>> +}
>>
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> c4814a87/src/changes/changes.xml
>> ----------------------------------------------------------------------
>> diff --git a/src/changes/changes.xml b/src/changes/changes.xml
>> index 074e31c..522f49b 100644
>> --- a/src/changes/changes.xml
>> +++ b/src/changes/changes.xml
>> @@ -31,6 +31,9 @@
>>            - "remove" - Removed
>>       -->
>>       <release version="2.9.0" date="2017-MM-DD" description="GA Release
>> 2.9.0">
>> +      <action issue="LOG4J2-1986" dev="mikes" type="add">
>> +        Public API for parsing the output from
>> JsonLayout/XmlLayout/YamlLayout
>> into a LogEvent.
>> +      </action>
>>         <action issue="LOG4J2-1984" dev="rgoers" type="update">
>>           Allow maxLength of StructuredData to be specified by the user.
>>         </action>
>>
>>
>

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