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18 package org.apache.log4j.helpers;
19
20 import java.io.Writer;
21 import java.io.FilterWriter;
22 import org.apache.log4j.spi.ErrorHandler;
23 import org.apache.log4j.spi.ErrorCode;
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34 public class QuietWriter extends FilterWriter {
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36 protected ErrorHandler errorHandler;
37
38 public
39 QuietWriter(Writer writer, ErrorHandler errorHandler) {
40 super(writer);
41 setErrorHandler(errorHandler);
42 }
43
44 public
45 void write(String string) {
46 if (string != null) {
47 try {
48 out.write(string);
49 } catch(Exception e) {
50 errorHandler.error("Failed to write ["+string+"].", e,
51 ErrorCode.WRITE_FAILURE);
52 }
53 }
54 }
55
56 public
57 void flush() {
58 try {
59 out.flush();
60 } catch(Exception e) {
61 errorHandler.error("Failed to flush writer,", e,
62 ErrorCode.FLUSH_FAILURE);
63 }
64 }
65
66
67 public
68 void setErrorHandler(ErrorHandler eh) {
69 if(eh == null) {
70
71 throw new IllegalArgumentException("Attempted to set null ErrorHandler.");
72 } else {
73 this.errorHandler = eh;
74 }
75 }
76 }