org.apache.log4j.helpers: public class: QuietWriter

org.apache.log4j.helpers
public class: QuietWriter [javadoc | source]

java.lang.Object
   java.io.Writer
      java.io.FilterWriter
         org.apache.log4j.helpers.QuietWriter

All Implemented Interfaces:
Closeable, Flushable, Appendable

Direct Known Subclasses:
CountingQuietWriter, SyslogQuietWriter

QuietWriter does not throw exceptions when things go wrong. Instead, it delegates error handling to its ErrorHandler .

author: Ceki - Gülcü

since: 0.7.3 -

Field Summary
protected ErrorHandler	errorHandler

Constructor:
public QuietWriter(Writer writer, ErrorHandler errorHandler) { super(writer); setErrorHandler(errorHandler); }

Method from org.apache.log4j.helpers.QuietWriter Summary:
flush, setErrorHandler, write

Methods from java.io.FilterWriter:
close, flush, write, write, write

Methods from java.io.Writer:
append, append, append, append, append, append, close, flush, write, write, write, write, write

Methods from java.lang.Object:
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from org.apache.log4j.helpers.QuietWriter Detail:
public void flush() { try { out.flush(); } catch(IOException e) { errorHandler.error("Failed to flush writer,", e, ErrorCode.FLUSH_FAILURE); } }
public void setErrorHandler(ErrorHandler eh) { if(eh == null) { // This is a programming error on the part of the enclosing appender. throw new IllegalArgumentException("Attempted to set null ErrorHandler."); } else { this.errorHandler = eh; } }
public void write(String string) { try { out.write(string); } catch(IOException e) { errorHandler.error("Failed to write ["+string+"].", e, ErrorCode.WRITE_FAILURE); } }

Method from org.apache.log4j.helpers.QuietWriter Detail:

 public  void flush() {
    try {
      out.flush();
    } catch(IOException e) {
      errorHandler.error("Failed to flush writer,", e, 
			 ErrorCode.FLUSH_FAILURE);
    }
}

 public  void setErrorHandler(ErrorHandler eh) {
    if(eh == null) {
      // This is a programming error on the part of the enclosing appender.
      throw new IllegalArgumentException("Attempted to set null ErrorHandler.");
    } else { 
      this.errorHandler = eh;
    }
}

 public  void write(String string) {
    try {
      out.write(string);
    } catch(IOException e) {
      errorHandler.error("Failed to write ["+string+"].", e, 
			 ErrorCode.WRITE_FAILURE);
    }
}