Source Code Cross Referenced for WriterTarget.java in  » Net » openfire » org » jivesoftware » util » log » output » io » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Net » openfire » org.jivesoftware.util.log.output.io 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        /*
02:         * Copyright (C) The Apache Software Foundation. All rights reserved.
03:         *
04:         * This software is published under the terms of the Apache Software License
05:         * version 1.1, a copy of which has been included with this distribution in
06:         * the LICENSE file.
07:         */
08:        package org.jivesoftware.util.log.output.io;
09:
10:        import org.jivesoftware.util.log.format.Formatter;
11:        import org.jivesoftware.util.log.output.AbstractOutputTarget;
12:        import java.io.IOException;
13:        import java.io.Writer;
14:
15:        /**
16:         * This target outputs to a writer.
17:         *
18:         * @author <a href="mailto:peter@apache.org">Peter Donald</a>
19:         */
20:        public class WriterTarget extends AbstractOutputTarget {
21:
22:            private Writer m_output;
23:
24:            /**
25:             * Construct target with a specific writer and formatter.
26:             *
27:             * @param writer    the writer
28:             * @param formatter the formatter
29:             */
30:            public WriterTarget(final Writer writer, final Formatter formatter) {
31:                super (formatter);
32:
33:                if (null != writer) {
34:                    setWriter(writer);
35:                    open();
36:                }
37:            }
38:
39:            /**
40:             * Set the writer.
41:             * Close down writer and send tail if appropriate.
42:             *
43:             * @param writer the new writer
44:             */
45:            protected synchronized void setWriter(final Writer writer) {
46:                if (null == writer) {
47:                    throw new NullPointerException(
48:                            "writer property must not be null");
49:                }
50:
51:                m_output = writer;
52:            }
53:
54:            /**
55:             * Concrete implementation of output that writes out to underlying writer.
56:             *
57:             * @param data the data to output
58:             */
59:            protected void write(final String data) {
60:                try {
61:                    m_output.write(data);
62:                    m_output.flush();
63:                } catch (final IOException ioe) {
64:                    getErrorHandler().error("Caught an IOException", ioe, null);
65:                }
66:            }
67:
68:            /**
69:             * Shutdown target.
70:             * Attempting to send to target after close() will cause errors to be logged.
71:             */
72:            public synchronized void close() {
73:                super .close();
74:                shutdownWriter();
75:            }
76:
77:            /**
78:             * Shutdown Writer.
79:             */
80:            protected synchronized void shutdownWriter() {
81:                final Writer writer = m_output;
82:                m_output = null;
83:
84:                try {
85:                    if (null != writer) {
86:                        writer.close();
87:                    }
88:                } catch (final IOException ioe) {
89:                    getErrorHandler().error("Error closing Writer", ioe, null);
90:                }
91:            }
92:        }
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