https://logging.apache.org/log4j/2.x/log4j-core/: The Apache Log4j Implementation (The Apache Software Foundation)
  • Ralph Goers (Nextiva)
  • Gary Gregory (Rocket Software)
  • Scott Deboy
  • Remko Popma
  • Nick Williams
  • Matt Sicker (Independent Consultant)
  • Bruce Brouwer
  • Mikael Ståldal (Spotify) 
public abstract class org.apache.logging.log4j.core.appender.AbstractWriterAppender<M extends org.apache.logging.log4j.core.appender.WriterManager> extends org.apache.logging.log4j.core.appender.AbstractAppender
  minor version: 0
  major version: 59
  flags: flags: (0x0421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT
  this_class: org.apache.logging.log4j.core.appender.AbstractWriterAppender
  super_class: org.apache.logging.log4j.core.appender.AbstractAppender
{
  protected final boolean immediateFlush;
    descriptor: Z
    flags: (0x0014) ACC_PROTECTED, ACC_FINAL

  private final M manager;
    descriptor: Lorg/apache/logging/log4j/core/appender/WriterManager;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: TM;

  private final java.util.concurrent.locks.ReadWriteLock readWriteLock;
    descriptor: Ljava/util/concurrent/locks/ReadWriteLock;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final java.util.concurrent.locks.Lock readLock;
    descriptor: Ljava/util/concurrent/locks/Lock;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  protected void <init>(java.lang.String, org.apache.logging.log4j.core.StringLayout, org.apache.logging.log4j.core.Filter, boolean, boolean, );
    descriptor: (Ljava/lang/String;Lorg/apache/logging/log4j/core/StringLayout;Lorg/apache/logging/log4j/core/Filter;ZZLorg/apache/logging/log4j/core/appender/WriterManager;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=5, locals=7, args_size=7
        start local 0 // org.apache.logging.log4j.core.appender.AbstractWriterAppender this
        start local 1 // java.lang.String name
        start local 2 // org.apache.logging.log4j.core.StringLayout layout
        start local 3 // org.apache.logging.log4j.core.Filter filter
        start local 4 // boolean ignoreExceptions
        start local 5 // boolean immediateFlush
        start local 6 // org.apache.logging.log4j.core.appender.WriterManager manager
         0: .line 61
            aload 0 /* this */
            aload 1 /* name */
            aload 3 /* filter */
            aload 2 /* layout */
            iload 4 /* ignoreExceptions */
            invokespecial org.apache.logging.log4j.core.appender.AbstractAppender.<init>:(Ljava/lang/String;Lorg/apache/logging/log4j/core/Filter;Lorg/apache/logging/log4j/core/Layout;Z)V
         1: .line 46
            aload 0 /* this */
            new java.util.concurrent.locks.ReentrantReadWriteLock
            dup
            invokespecial java.util.concurrent.locks.ReentrantReadWriteLock.<init>:()V
            putfield org.apache.logging.log4j.core.appender.AbstractWriterAppender.readWriteLock:Ljava/util/concurrent/locks/ReadWriteLock;
         2: .line 47
            aload 0 /* this */
            aload 0 /* this */
            getfield org.apache.logging.log4j.core.appender.AbstractWriterAppender.readWriteLock:Ljava/util/concurrent/locks/ReadWriteLock;
            invokeinterface java.util.concurrent.locks.ReadWriteLock.readLock:()Ljava/util/concurrent/locks/Lock;
            putfield org.apache.logging.log4j.core.appender.AbstractWriterAppender.readLock:Ljava/util/concurrent/locks/Lock;
         3: .line 62
            aload 0 /* this */
            aload 6 /* manager */
            putfield org.apache.logging.log4j.core.appender.AbstractWriterAppender.manager:Lorg/apache/logging/log4j/core/appender/WriterManager;
         4: .line 63
            aload 0 /* this */
            iload 5 /* immediateFlush */
            putfield org.apache.logging.log4j.core.appender.AbstractWriterAppender.immediateFlush:Z
         5: .line 64
            return
        end local 6 // org.apache.logging.log4j.core.appender.WriterManager manager
        end local 5 // boolean immediateFlush
        end local 4 // boolean ignoreExceptions
        end local 3 // org.apache.logging.log4j.core.Filter filter
        end local 2 // org.apache.logging.log4j.core.StringLayout layout
        end local 1 // java.lang.String name
        end local 0 // org.apache.logging.log4j.core.appender.AbstractWriterAppender this
      LocalVariableTable:
        Start  End  Slot              Name  Signature
            0    6     0              this  Lorg/apache/logging/log4j/core/appender/AbstractWriterAppender<TM;>;
            0    6     1              name  Ljava/lang/String;
            0    6     2            layout  Lorg/apache/logging/log4j/core/StringLayout;
            0    6     3            filter  Lorg/apache/logging/log4j/core/Filter;
            0    6     4  ignoreExceptions  Z
            0    6     5    immediateFlush  Z
            0    6     6           manager  TM;
    Signature: (Ljava/lang/String;Lorg/apache/logging/log4j/core/StringLayout;Lorg/apache/logging/log4j/core/Filter;ZZTM;)V
    MethodParameters:
                  Name  Flags
      name              final
      layout            final
      filter            final
      ignoreExceptions  final
      immediateFlush    final
      manager           final

  public void append(org.apache.logging.log4j.core.LogEvent);
    descriptor: (Lorg/apache/logging/log4j/core/LogEvent;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=4, args_size=2
        start local 0 // org.apache.logging.log4j.core.appender.AbstractWriterAppender this
        start local 1 // org.apache.logging.log4j.core.LogEvent event
         0: .line 77
            aload 0 /* this */
            getfield org.apache.logging.log4j.core.appender.AbstractWriterAppender.readLock:Ljava/util/concurrent/locks/Lock;
            invokeinterface java.util.concurrent.locks.Lock.lock:()V
         1: .line 79
            aload 0 /* this */
            invokevirtual org.apache.logging.log4j.core.appender.AbstractWriterAppender.getStringLayout:()Lorg/apache/logging/log4j/core/StringLayout;
            aload 1 /* event */
            invokeinterface org.apache.logging.log4j.core.StringLayout.toSerializable:(Lorg/apache/logging/log4j/core/LogEvent;)Ljava/io/Serializable;
            checkcast java.lang.String
            astore 2 /* str */
        start local 2 // java.lang.String str
         2: .line 80
            aload 2 /* str */
            invokevirtual java.lang.String.length:()I
            ifle 13
         3: .line 81
            aload 0 /* this */
            getfield org.apache.logging.log4j.core.appender.AbstractWriterAppender.manager:Lorg/apache/logging/log4j/core/appender/WriterManager;
            aload 2 /* str */
            invokevirtual org.apache.logging.log4j.core.appender.WriterManager.write:(Ljava/lang/String;)V
         4: .line 82
            aload 0 /* this */
            getfield org.apache.logging.log4j.core.appender.AbstractWriterAppender.immediateFlush:Z
            ifne 5
            aload 1 /* event */
            invokeinterface org.apache.logging.log4j.core.LogEvent.isEndOfBatch:()Z
            ifeq 13
         5: .line 83
      StackMap locals: java.lang.String
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.logging.log4j.core.appender.AbstractWriterAppender.manager:Lorg/apache/logging/log4j/core/appender/WriterManager;
            invokevirtual org.apache.logging.log4j.core.appender.WriterManager.flush:()V
        end local 2 // java.lang.String str
         6: .line 86
            goto 13
      StackMap locals: org.apache.logging.log4j.core.appender.AbstractWriterAppender org.apache.logging.log4j.core.LogEvent
      StackMap stack: org.apache.logging.log4j.core.appender.AppenderLoggingException
         7: astore 2 /* ex */
        start local 2 // org.apache.logging.log4j.core.appender.AppenderLoggingException ex
         8: .line 87
            aload 0 /* this */
            new java.lang.StringBuilder
            dup
            ldc "Unable to write "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* this */
            getfield org.apache.logging.log4j.core.appender.AbstractWriterAppender.manager:Lorg/apache/logging/log4j/core/appender/WriterManager;
            invokevirtual org.apache.logging.log4j.core.appender.WriterManager.getName:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            ldc " for appender "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            aload 0 /* this */
            invokevirtual org.apache.logging.log4j.core.appender.AbstractWriterAppender.getName:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            ldc ": "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            aload 2 /* ex */
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokevirtual org.apache.logging.log4j.core.appender.AbstractWriterAppender.error:(Ljava/lang/String;)V
         9: .line 88
            aload 2 /* ex */
            athrow
        end local 2 // org.apache.logging.log4j.core.appender.AppenderLoggingException ex
        10: .line 89
      StackMap locals:
      StackMap stack: java.lang.Throwable
            astore 3
        11: .line 90
            aload 0 /* this */
            getfield org.apache.logging.log4j.core.appender.AbstractWriterAppender.readLock:Ljava/util/concurrent/locks/Lock;
            invokeinterface java.util.concurrent.locks.Lock.unlock:()V
        12: .line 91
            aload 3
            athrow
        13: .line 90
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.logging.log4j.core.appender.AbstractWriterAppender.readLock:Ljava/util/concurrent/locks/Lock;
            invokeinterface java.util.concurrent.locks.Lock.unlock:()V
        14: .line 92
            return
        end local 1 // org.apache.logging.log4j.core.LogEvent event
        end local 0 // org.apache.logging.log4j.core.appender.AbstractWriterAppender this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0   15     0   this  Lorg/apache/logging/log4j/core/appender/AbstractWriterAppender<TM;>;
            0   15     1  event  Lorg/apache/logging/log4j/core/LogEvent;
            2    6     2    str  Ljava/lang/String;
            8   10     2     ex  Lorg/apache/logging/log4j/core/appender/AppenderLoggingException;
      Exception table:
        from    to  target  type
           1     6       7  Class org.apache.logging.log4j.core.appender.AppenderLoggingException
           1    10      10  any
    MethodParameters:
       Name  Flags
      event  final

  public M getManager();
    descriptor: ()Lorg/apache/logging/log4j/core/appender/WriterManager;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.logging.log4j.core.appender.AbstractWriterAppender this
         0: .line 100
            aload 0 /* this */
            getfield org.apache.logging.log4j.core.appender.AbstractWriterAppender.manager:Lorg/apache/logging/log4j/core/appender/WriterManager;
            areturn
        end local 0 // org.apache.logging.log4j.core.appender.AbstractWriterAppender this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/logging/log4j/core/appender/AbstractWriterAppender<TM;>;
    Signature: ()TM;

  public org.apache.logging.log4j.core.StringLayout getStringLayout();
    descriptor: ()Lorg/apache/logging/log4j/core/StringLayout;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.logging.log4j.core.appender.AbstractWriterAppender this
         0: .line 104
            aload 0 /* this */
            invokevirtual org.apache.logging.log4j.core.appender.AbstractWriterAppender.getLayout:()Lorg/apache/logging/log4j/core/Layout;
            checkcast org.apache.logging.log4j.core.StringLayout
            areturn
        end local 0 // org.apache.logging.log4j.core.appender.AbstractWriterAppender this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/logging/log4j/core/appender/AbstractWriterAppender<TM;>;

  public void start();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // org.apache.logging.log4j.core.appender.AbstractWriterAppender this
         0: .line 109
            aload 0 /* this */
            invokevirtual org.apache.logging.log4j.core.appender.AbstractWriterAppender.getLayout:()Lorg/apache/logging/log4j/core/Layout;
            ifnonnull 2
         1: .line 110
            getstatic org.apache.logging.log4j.core.appender.AbstractWriterAppender.LOGGER:Lorg/apache/logging/log4j/Logger;
            ldc "No layout set for the appender named [{}]."
            aload 0 /* this */
            invokevirtual org.apache.logging.log4j.core.appender.AbstractWriterAppender.getName:()Ljava/lang/String;
            invokeinterface org.apache.logging.log4j.Logger.error:(Ljava/lang/String;Ljava/lang/Object;)V
         2: .line 112
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.logging.log4j.core.appender.AbstractWriterAppender.manager:Lorg/apache/logging/log4j/core/appender/WriterManager;
            ifnonnull 4
         3: .line 113
            getstatic org.apache.logging.log4j.core.appender.AbstractWriterAppender.LOGGER:Lorg/apache/logging/log4j/Logger;
            ldc "No OutputStreamManager set for the appender named [{}]."
            aload 0 /* this */
            invokevirtual org.apache.logging.log4j.core.appender.AbstractWriterAppender.getName:()Ljava/lang/String;
            invokeinterface org.apache.logging.log4j.Logger.error:(Ljava/lang/String;Ljava/lang/Object;)V
         4: .line 115
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            invokespecial org.apache.logging.log4j.core.appender.AbstractAppender.start:()V
         5: .line 116
            return
        end local 0 // org.apache.logging.log4j.core.appender.AbstractWriterAppender this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    6     0  this  Lorg/apache/logging/log4j/core/appender/AbstractWriterAppender<TM;>;

  public boolean stop(long, java.util.concurrent.TimeUnit);
    descriptor: (JLjava/util/concurrent/TimeUnit;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=5, args_size=3
        start local 0 // org.apache.logging.log4j.core.appender.AbstractWriterAppender this
        start local 1 // long timeout
        start local 3 // java.util.concurrent.TimeUnit timeUnit
         0: .line 120
            aload 0 /* this */
            invokevirtual org.apache.logging.log4j.core.appender.AbstractWriterAppender.setStopping:()V
         1: .line 121
            aload 0 /* this */
            lload 1 /* timeout */
            aload 3 /* timeUnit */
            iconst_0
            invokespecial org.apache.logging.log4j.core.appender.AbstractAppender.stop:(JLjava/util/concurrent/TimeUnit;Z)Z
            istore 4 /* stopped */
        start local 4 // boolean stopped
         2: .line 122
            iload 4 /* stopped */
            aload 0 /* this */
            getfield org.apache.logging.log4j.core.appender.AbstractWriterAppender.manager:Lorg/apache/logging/log4j/core/appender/WriterManager;
            lload 1 /* timeout */
            aload 3 /* timeUnit */
            invokevirtual org.apache.logging.log4j.core.appender.WriterManager.stop:(JLjava/util/concurrent/TimeUnit;)Z
            iand
            istore 4 /* stopped */
         3: .line 123
            aload 0 /* this */
            invokevirtual org.apache.logging.log4j.core.appender.AbstractWriterAppender.setStopped:()V
         4: .line 124
            iload 4 /* stopped */
            ireturn
        end local 4 // boolean stopped
        end local 3 // java.util.concurrent.TimeUnit timeUnit
        end local 1 // long timeout
        end local 0 // org.apache.logging.log4j.core.appender.AbstractWriterAppender this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    5     0      this  Lorg/apache/logging/log4j/core/appender/AbstractWriterAppender<TM;>;
            0    5     1   timeout  J
            0    5     3  timeUnit  Ljava/util/concurrent/TimeUnit;
            2    5     4   stopped  Z
    MethodParameters:
          Name  Flags
      timeout   final
      timeUnit  final
}
Signature: <M:Lorg/apache/logging/log4j/core/appender/WriterManager;>Lorg/apache/logging/log4j/core/appender/AbstractAppender;
SourceFile: "AbstractWriterAppender.java"