org.apache.logging.log4j.core.layout
Class JsonLayout

java.lang.Object
  extended by org.apache.logging.log4j.core.layout.AbstractLayout<String>
      extended by org.apache.logging.log4j.core.layout.AbstractStringLayout
          extended by org.apache.logging.log4j.core.layout.JsonLayout
All Implemented Interfaces:
Layout<String>

@Plugin(name="JsonLayout",
        category="Core",
        elementType="layout",
        printObject=true)
public final class JsonLayout
extends AbstractStringLayout

Appends a series of JSON events as strings serialized as bytes.

Complete well-formed JSON vs. fragment JSON

If you configure complete="true", the appender outputs a well-formed JSON document. By default, with complete="false", you should include the output as an external file in a separate file to form a well-formed JSON document.

A well-formed JSON event follows this pattern:

 {
  "timeMillis": 1,
  "thread": "MyThreadName",
  "level": "DEBUG",
  "loggerName": "a.B",
  "marker": {
    "name": "Marker1",
    "parents": [{
      "name": "ParentMarker1",
      "parents": [{
        "name": "GrandMotherMarker"
      }, {
        "name": "GrandFatherMarker"
      }]
    }, {
      "name": "GrandFatherMarker"
    }]
  },
  "message": "Msg",
  "thrown": {
    "cause": {
      "commonElementCount": 27,
      "extendedStackTrace": [{
        "class": "org.apache.logging.log4j.core.layout.LogEventFixtures",
        "method": "createLogEvent",
        "file": "LogEventFixtures.java",
        "line": 53,
        "exact": false,
        "location": "test-classes/",
        "version": "?"
      }],
      "localizedMessage": "testNPEx",
      "message": "testNPEx",
      "name": "java.lang.NullPointerException"
    },
    "commonElementCount": 0,
    "extendedStackTrace": [{
      "class": "org.apache.logging.log4j.core.layout.LogEventFixtures",
      "method": "createLogEvent",
      "file": "LogEventFixtures.java",
      "line": 56,
      "exact": true,
      "location": "test-classes/",
      "version": "?"
    }, {
      "class": "org.apache.logging.log4j.core.layout.JsonLayoutTest",
      "method": "testAllFeatures",
      "file": "JsonLayoutTest.java",
      "line": 105,
      "exact": true,
      "location": "test-classes/",
      "version": "?"
    }, {
      "class": "org.apache.logging.log4j.core.layout.JsonLayoutTest",
      "method": "testLocationOnCompactOnMdcOn",
      "file": "JsonLayoutTest.java",
      "line": 268,
      "exact": true,
      "location": "test-classes/",
      "version": "?"
    }, {
      "class": "sun.reflect.NativeMethodAccessorImpl",
      "method": "invoke",
      "line": -1,
      "exact": false,
      "location": "?",
      "version": "1.7.0_55"
    }, {
      "class": "sun.reflect.NativeMethodAccessorImpl",
      "method": "invoke",
      "line": -1,
      "exact": false,
      "location": "?",
      "version": "1.7.0_55"
    }, {
      "class": "sun.reflect.DelegatingMethodAccessorImpl",
      "method": "invoke",
      "line": -1,
      "exact": false,
      "location": "?",
      "version": "1.7.0_55"
    }, {
      "class": "java.lang.reflect.Method",
      "method": "invoke",
      "line": -1,
      "exact": false,
      "location": "?",
      "version": "1.7.0_55"
    }, {
      "class": "org.junit.runners.model.FrameworkMethod$1",
      "method": "runReflectiveCall",
      "file": "FrameworkMethod.java",
      "line": 47,
      "exact": true,
      "location": "junit-4.11.jar",
      "version": "?"
    }, {
      "class": "org.junit.internal.runners.model.ReflectiveCallable",
      "method": "run",
      "file": "ReflectiveCallable.java",
      "line": 12,
      "exact": true,
      "location": "junit-4.11.jar",
      "version": "?"
    }, {
      "class": "org.junit.runners.model.FrameworkMethod",
      "method": "invokeExplosively",
      "file": "FrameworkMethod.java",
      "line": 44,
      "exact": true,
      "location": "junit-4.11.jar",
      "version": "?"
    }, {
      "class": "org.junit.internal.runners.statements.InvokeMethod",
      "method": "evaluate",
      "file": "InvokeMethod.java",
      "line": 17,
      "exact": true,
      "location": "junit-4.11.jar",
      "version": "?"
    }, {
      "class": "org.junit.runners.ParentRunner",
      "method": "runLeaf",
      "file": "ParentRunner.java",
      "line": 271,
      "exact": true,
      "location": "junit-4.11.jar",
      "version": "?"
    }, {
      "class": "org.junit.runners.BlockJUnit4ClassRunner",
      "method": "runChild",
      "file": "BlockJUnit4ClassRunner.java",
      "line": 70,
      "exact": true,
      "location": "junit-4.11.jar",
      "version": "?"
    }, {
      "class": "org.junit.runners.BlockJUnit4ClassRunner",
      "method": "runChild",
      "file": "BlockJUnit4ClassRunner.java",
      "line": 50,
      "exact": true,
      "location": "junit-4.11.jar",
      "version": "?"
    }, {
      "class": "org.junit.runners.ParentRunner$3",
      "method": "run",
      "file": "ParentRunner.java",
      "line": 238,
      "exact": true,
      "location": "junit-4.11.jar",
      "version": "?"
    }, {
      "class": "org.junit.runners.ParentRunner$1",
      "method": "schedule",
      "file": "ParentRunner.java",
      "line": 63,
      "exact": true,
      "location": "junit-4.11.jar",
      "version": "?"
    }, {
      "class": "org.junit.runners.ParentRunner",
      "method": "runChildren",
      "file": "ParentRunner.java",
      "line": 236,
      "exact": true,
      "location": "junit-4.11.jar",
      "version": "?"
    }, {
      "class": "org.junit.runners.ParentRunner",
      "method": "access$000",
      "file": "ParentRunner.java",
      "line": 53,
      "exact": true,
      "location": "junit-4.11.jar",
      "version": "?"
    }, {
      "class": "org.junit.runners.ParentRunner$2",
      "method": "evaluate",
      "file": "ParentRunner.java",
      "line": 229,
      "exact": true,
      "location": "junit-4.11.jar",
      "version": "?"
    }, {
      "class": "org.junit.internal.runners.statements.RunBefores",
      "method": "evaluate",
      "file": "RunBefores.java",
      "line": 26,
      "exact": true,
      "location": "junit-4.11.jar",
      "version": "?"
    }, {
      "class": "org.junit.internal.runners.statements.RunAfters",
      "method": "evaluate",
      "file": "RunAfters.java",
      "line": 27,
      "exact": true,
      "location": "junit-4.11.jar",
      "version": "?"
    }, {
      "class": "org.junit.runners.ParentRunner",
      "method": "run",
      "file": "ParentRunner.java",
      "line": 309,
      "exact": true,
      "location": "junit-4.11.jar",
      "version": "?"
    }, {
      "class": "org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference",
      "method": "run",
      "file": "JUnit4TestReference.java",
      "line": 50,
      "exact": true,
      "location": ".cp/",
      "version": "?"
    }, {
      "class": "org.eclipse.jdt.internal.junit.runner.TestExecution",
      "method": "run",
      "file": "TestExecution.java",
      "line": 38,
      "exact": true,
      "location": ".cp/",
      "version": "?"
    }, {
      "class": "org.eclipse.jdt.internal.junit.runner.RemoteTestRunner",
      "method": "runTests",
      "file": "RemoteTestRunner.java",
      "line": 467,
      "exact": true,
      "location": ".cp/",
      "version": "?"
    }, {
      "class": "org.eclipse.jdt.internal.junit.runner.RemoteTestRunner",
      "method": "runTests",
      "file": "RemoteTestRunner.java",
      "line": 683,
      "exact": true,
      "location": ".cp/",
      "version": "?"
    }, {
      "class": "org.eclipse.jdt.internal.junit.runner.RemoteTestRunner",
      "method": "run",
      "file": "RemoteTestRunner.java",
      "line": 390,
      "exact": true,
      "location": ".cp/",
      "version": "?"
    }, {
      "class": "org.eclipse.jdt.internal.junit.runner.RemoteTestRunner",
      "method": "main",
      "file": "RemoteTestRunner.java",
      "line": 197,
      "exact": true,
      "location": ".cp/",
      "version": "?"
    }],
    "localizedMessage": "testIOEx",
    "message": "testIOEx",
    "name": "java.io.IOException",
    "suppressed": [{
      "commonElementCount": 0,
      "extendedStackTrace": [{
        "class": "org.apache.logging.log4j.core.layout.LogEventFixtures",
        "method": "createLogEvent",
        "file": "LogEventFixtures.java",
        "line": 57,
        "exact": true,
        "location": "test-classes/",
        "version": "?"
      }, {
        "class": "org.apache.logging.log4j.core.layout.JsonLayoutTest",
        "method": "testAllFeatures",
        "file": "JsonLayoutTest.java",
        "line": 105,
        "exact": true,
        "location": "test-classes/",
        "version": "?"
      }, {
        "class": "org.apache.logging.log4j.core.layout.JsonLayoutTest",
        "method": "testLocationOnCompactOnMdcOn",
        "file": "JsonLayoutTest.java",
        "line": 268,
        "exact": true,
        "location": "test-classes/",
        "version": "?"
      }, {
        "class": "sun.reflect.NativeMethodAccessorImpl",
        "method": "invoke",
        "line": -1,
        "exact": false,
        "location": "?",
        "version": "1.7.0_55"
      }, {
        "class": "sun.reflect.NativeMethodAccessorImpl",
        "method": "invoke",
        "line": -1,
        "exact": false,
        "location": "?",
        "version": "1.7.0_55"
      }, {
        "class": "sun.reflect.DelegatingMethodAccessorImpl",
        "method": "invoke",
        "line": -1,
        "exact": false,
        "location": "?",
        "version": "1.7.0_55"
      }, {
        "class": "java.lang.reflect.Method",
        "method": "invoke",
        "line": -1,
        "exact": false,
        "location": "?",
        "version": "1.7.0_55"
      }, {
        "class": "org.junit.runners.model.FrameworkMethod$1",
        "method": "runReflectiveCall",
        "file": "FrameworkMethod.java",
        "line": 47,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.internal.runners.model.ReflectiveCallable",
        "method": "run",
        "file": "ReflectiveCallable.java",
        "line": 12,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.runners.model.FrameworkMethod",
        "method": "invokeExplosively",
        "file": "FrameworkMethod.java",
        "line": 44,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.internal.runners.statements.InvokeMethod",
        "method": "evaluate",
        "file": "InvokeMethod.java",
        "line": 17,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.runners.ParentRunner",
        "method": "runLeaf",
        "file": "ParentRunner.java",
        "line": 271,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.runners.BlockJUnit4ClassRunner",
        "method": "runChild",
        "file": "BlockJUnit4ClassRunner.java",
        "line": 70,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.runners.BlockJUnit4ClassRunner",
        "method": "runChild",
        "file": "BlockJUnit4ClassRunner.java",
        "line": 50,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.runners.ParentRunner$3",
        "method": "run",
        "file": "ParentRunner.java",
        "line": 238,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.runners.ParentRunner$1",
        "method": "schedule",
        "file": "ParentRunner.java",
        "line": 63,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.runners.ParentRunner",
        "method": "runChildren",
        "file": "ParentRunner.java",
        "line": 236,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.runners.ParentRunner",
        "method": "access$000",
        "file": "ParentRunner.java",
        "line": 53,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.runners.ParentRunner$2",
        "method": "evaluate",
        "file": "ParentRunner.java",
        "line": 229,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.internal.runners.statements.RunBefores",
        "method": "evaluate",
        "file": "RunBefores.java",
        "line": 26,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.internal.runners.statements.RunAfters",
        "method": "evaluate",
        "file": "RunAfters.java",
        "line": 27,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.runners.ParentRunner",
        "method": "run",
        "file": "ParentRunner.java",
        "line": 309,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference",
        "method": "run",
        "file": "JUnit4TestReference.java",
        "line": 50,
        "exact": true,
        "location": ".cp/",
        "version": "?"
      }, {
        "class": "org.eclipse.jdt.internal.junit.runner.TestExecution",
        "method": "run",
        "file": "TestExecution.java",
        "line": 38,
        "exact": true,
        "location": ".cp/",
        "version": "?"
      }, {
        "class": "org.eclipse.jdt.internal.junit.runner.RemoteTestRunner",
        "method": "runTests",
        "file": "RemoteTestRunner.java",
        "line": 467,
        "exact": true,
        "location": ".cp/",
        "version": "?"
      }, {
        "class": "org.eclipse.jdt.internal.junit.runner.RemoteTestRunner",
        "method": "runTests",
        "file": "RemoteTestRunner.java",
        "line": 683,
        "exact": true,
        "location": ".cp/",
        "version": "?"
      }, {
        "class": "org.eclipse.jdt.internal.junit.runner.RemoteTestRunner",
        "method": "run",
        "file": "RemoteTestRunner.java",
        "line": 390,
        "exact": true,
        "location": ".cp/",
        "version": "?"
      }, {
        "class": "org.eclipse.jdt.internal.junit.runner.RemoteTestRunner",
        "method": "main",
        "file": "RemoteTestRunner.java",
        "line": 197,
        "exact": true,
        "location": ".cp/",
        "version": "?"
      }],
      "localizedMessage": "I am suppressed exception 1",
      "message": "I am suppressed exception 1",
      "name": "java.lang.IndexOutOfBoundsException"
    }, {
      "commonElementCount": 0,
      "extendedStackTrace": [{
        "class": "org.apache.logging.log4j.core.layout.LogEventFixtures",
        "method": "createLogEvent",
        "file": "LogEventFixtures.java",
        "line": 58,
        "exact": true,
        "location": "test-classes/",
        "version": "?"
      }, {
        "class": "org.apache.logging.log4j.core.layout.JsonLayoutTest",
        "method": "testAllFeatures",
        "file": "JsonLayoutTest.java",
        "line": 105,
        "exact": true,
        "location": "test-classes/",
        "version": "?"
      }, {
        "class": "org.apache.logging.log4j.core.layout.JsonLayoutTest",
        "method": "testLocationOnCompactOnMdcOn",
        "file": "JsonLayoutTest.java",
        "line": 268,
        "exact": true,
        "location": "test-classes/",
        "version": "?"
      }, {
        "class": "sun.reflect.NativeMethodAccessorImpl",
        "method": "invoke",
        "line": -1,
        "exact": false,
        "location": "?",
        "version": "1.7.0_55"
      }, {
        "class": "sun.reflect.NativeMethodAccessorImpl",
        "method": "invoke",
        "line": -1,
        "exact": false,
        "location": "?",
        "version": "1.7.0_55"
      }, {
        "class": "sun.reflect.DelegatingMethodAccessorImpl",
        "method": "invoke",
        "line": -1,
        "exact": false,
        "location": "?",
        "version": "1.7.0_55"
      }, {
        "class": "java.lang.reflect.Method",
        "method": "invoke",
        "line": -1,
        "exact": false,
        "location": "?",
        "version": "1.7.0_55"
      }, {
        "class": "org.junit.runners.model.FrameworkMethod$1",
        "method": "runReflectiveCall",
        "file": "FrameworkMethod.java",
        "line": 47,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.internal.runners.model.ReflectiveCallable",
        "method": "run",
        "file": "ReflectiveCallable.java",
        "line": 12,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.runners.model.FrameworkMethod",
        "method": "invokeExplosively",
        "file": "FrameworkMethod.java",
        "line": 44,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.internal.runners.statements.InvokeMethod",
        "method": "evaluate",
        "file": "InvokeMethod.java",
        "line": 17,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.runners.ParentRunner",
        "method": "runLeaf",
        "file": "ParentRunner.java",
        "line": 271,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.runners.BlockJUnit4ClassRunner",
        "method": "runChild",
        "file": "BlockJUnit4ClassRunner.java",
        "line": 70,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.runners.BlockJUnit4ClassRunner",
        "method": "runChild",
        "file": "BlockJUnit4ClassRunner.java",
        "line": 50,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.runners.ParentRunner$3",
        "method": "run",
        "file": "ParentRunner.java",
        "line": 238,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.runners.ParentRunner$1",
        "method": "schedule",
        "file": "ParentRunner.java",
        "line": 63,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.runners.ParentRunner",
        "method": "runChildren",
        "file": "ParentRunner.java",
        "line": 236,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.runners.ParentRunner",
        "method": "access$000",
        "file": "ParentRunner.java",
        "line": 53,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.runners.ParentRunner$2",
        "method": "evaluate",
        "file": "ParentRunner.java",
        "line": 229,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.internal.runners.statements.RunBefores",
        "method": "evaluate",
        "file": "RunBefores.java",
        "line": 26,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.internal.runners.statements.RunAfters",
        "method": "evaluate",
        "file": "RunAfters.java",
        "line": 27,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.junit.runners.ParentRunner",
        "method": "run",
        "file": "ParentRunner.java",
        "line": 309,
        "exact": true,
        "location": "junit-4.11.jar",
        "version": "?"
      }, {
        "class": "org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference",
        "method": "run",
        "file": "JUnit4TestReference.java",
        "line": 50,
        "exact": true,
        "location": ".cp/",
        "version": "?"
      }, {
        "class": "org.eclipse.jdt.internal.junit.runner.TestExecution",
        "method": "run",
        "file": "TestExecution.java",
        "line": 38,
        "exact": true,
        "location": ".cp/",
        "version": "?"
      }, {
        "class": "org.eclipse.jdt.internal.junit.runner.RemoteTestRunner",
        "method": "runTests",
        "file": "RemoteTestRunner.java",
        "line": 467,
        "exact": true,
        "location": ".cp/",
        "version": "?"
      }, {
        "class": "org.eclipse.jdt.internal.junit.runner.RemoteTestRunner",
        "method": "runTests",
        "file": "RemoteTestRunner.java",
        "line": 683,
        "exact": true,
        "location": ".cp/",
        "version": "?"
      }, {
        "class": "org.eclipse.jdt.internal.junit.runner.RemoteTestRunner",
        "method": "run",
        "file": "RemoteTestRunner.java",
        "line": 390,
        "exact": true,
        "location": ".cp/",
        "version": "?"
      }, {
        "class": "org.eclipse.jdt.internal.junit.runner.RemoteTestRunner",
        "method": "main",
        "file": "RemoteTestRunner.java",
        "line": 197,
        "exact": true,
        "location": ".cp/",
        "version": "?"
      }],
      "localizedMessage": "I am suppressed exception 2",
      "message": "I am suppressed exception 2",
      "name": "java.lang.IndexOutOfBoundsException"
    }]
  },
  "loggerFQCN": "f.q.c.n",
  "endOfBatch": false,
  "contextMap": [{
    "key": "MDC.B",
    "value": "B_Value"
  }, {
    "key": "MDC.A",
    "value": "A_Value"
  }],
  "contextStack": ["stack_msg1", "stack_msg2"],
  "source": {
    "class": "org.apache.logging.log4j.core.layout.LogEventFixtures",
    "method": "createLogEvent",
    "file": "LogEventFixtures.java",
    "line": 54
  }
}
 

If complete="false", the appender does not write the JSON open array character "[" at the start of the document. and "]" and the end.

This approach enforces the independence of the JsonLayout and the appender where you embed it.

Encoding

Appenders using this layout should have their charset set to UTF-8 or UTF-16, otherwise events containing non ASCII characters could result in corrupted log files.

Pretty vs. compact XML

By default, the JSON layout is not compact (a.k.a. not "pretty") with compact="false", which means the appender uses end-of-line characters and indents lines to format the text. If compact="true", then no end-of-line or indentation is used. Message content may contain, of course, escaped end-of-lines.


Field Summary
protected  boolean compact
           
protected static String COMPACT_EOL
           
protected  boolean complete
           
protected static String DEFAULT_EOL
           
protected  String eol
           
protected  com.fasterxml.jackson.databind.ObjectWriter objectWriter
           
 
Fields inherited from class org.apache.logging.log4j.core.layout.AbstractLayout
footer, header, LOGGER
 
Constructor Summary
protected JsonLayout(boolean locationInfo, boolean properties, boolean complete, boolean compact, Charset charset)
           
 
Method Summary
static org.apache.logging.log4j.core.layout.AbstractJacksonLayout createDefaultLayout()
          Creates a JSON Layout using the default settings.
static org.apache.logging.log4j.core.layout.AbstractJacksonLayout createLayout(boolean locationInfo, boolean properties, boolean complete, boolean compact, Charset charset)
          Creates a JSON Layout.
 Map<String,String> getContentFormat()
          Returns a description of the content format.
 String getContentType()
          Returns the content type output by this layout.
 byte[] getFooter()
          Returns appropriate JSON footer.
 byte[] getHeader()
          Returns appropriate JSON headers.
 String toSerializable(LogEvent event)
          Formats a LogEvent.
 
Methods inherited from class org.apache.logging.log4j.core.layout.AbstractStringLayout
getCharset, toByteArray
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

DEFAULT_EOL

protected static final String DEFAULT_EOL
See Also:
Constant Field Values

COMPACT_EOL

protected static final String COMPACT_EOL
See Also:
Constant Field Values

eol

protected final String eol

objectWriter

protected final com.fasterxml.jackson.databind.ObjectWriter objectWriter

compact

protected final boolean compact

complete

protected final boolean complete
Constructor Detail

JsonLayout

protected JsonLayout(boolean locationInfo,
                     boolean properties,
                     boolean complete,
                     boolean compact,
                     Charset charset)
Method Detail

getHeader

public byte[] getHeader()
Returns appropriate JSON headers.

Specified by:
getHeader in interface Layout<String>
Overrides:
getHeader in class AbstractLayout<String>
Returns:
a byte array containing the header, opening the JSON array.

getFooter

public byte[] getFooter()
Returns appropriate JSON footer.

Specified by:
getFooter in interface Layout<String>
Overrides:
getFooter in class AbstractLayout<String>
Returns:
a byte array containing the footer, closing the JSON array.

getContentFormat

public Map<String,String> getContentFormat()
Description copied from interface: Layout
Returns a description of the content format.

Returns:
a Map of key/value pairs describing the Layout-specific content format, or an empty Map if no content format descriptors are specified.

getContentType

public String getContentType()
Description copied from interface: Layout
Returns the content type output by this layout. The base class returns "text/plain".

Specified by:
getContentType in interface Layout<String>
Overrides:
getContentType in class AbstractStringLayout
Returns:
The default content type for Strings.

createLayout

@PluginFactory
public static org.apache.logging.log4j.core.layout.AbstractJacksonLayout createLayout(@PluginAttribute(value="locationInfo",defaultBoolean=false)
                                                                                                    boolean locationInfo,
                                                                                                    @PluginAttribute(value="properties",defaultBoolean=false)
                                                                                                    boolean properties,
                                                                                                    @PluginAttribute(value="complete",defaultBoolean=false)
                                                                                                    boolean complete,
                                                                                                    @PluginAttribute(value="compact",defaultBoolean=false)
                                                                                                    boolean compact,
                                                                                                    @PluginAttribute(value="charset",defaultString="UTF-8")
                                                                                                    Charset charset)
Creates a JSON Layout.

Parameters:
locationInfo - If "true", includes the location information in the generated JSON.
properties - If "true", includes the thread context in the generated JSON.
complete - If "true", includes the JSON header and footer, defaults to "false".
compact - If "true", does not use end-of-lines and indentation, defaults to "false".
charset - The character set to use, if null, uses "UTF-8".
Returns:
A JSON Layout.

createDefaultLayout

public static org.apache.logging.log4j.core.layout.AbstractJacksonLayout createDefaultLayout()
Creates a JSON Layout using the default settings.

Returns:
A JSON Layout.

toSerializable

public String toSerializable(LogEvent event)
Formats a LogEvent.

Parameters:
event - The LogEvent.
Returns:
The XML representation of the LogEvent.


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