X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=unused%2Fsrcjar_unused%2Forg%2Fapache%2Flog4j%2FConsoleAppender.java;fp=unused%2Fsrcjar_unused%2Forg%2Fapache%2Flog4j%2FConsoleAppender.java;h=b44fd5fddc6004ac91c926430f292be18e560cc7;hb=7e01e1b3e9c8abdf952e085dba51e9266f12b1ee;hp=0000000000000000000000000000000000000000;hpb=88635c3965bb2f1f45e53c2d5f66fed19b93012a;p=jalview.git diff --git a/unused/srcjar_unused/org/apache/log4j/ConsoleAppender.java b/unused/srcjar_unused/org/apache/log4j/ConsoleAppender.java new file mode 100644 index 0000000..b44fd5f --- /dev/null +++ b/unused/srcjar_unused/org/apache/log4j/ConsoleAppender.java @@ -0,0 +1,220 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.log4j; + +import java.io.IOException; +import java.io.OutputStream; +import org.apache.log4j.helpers.LogLog; + +/** + * ConsoleAppender appends log events to System.out or + * System.err using a layout specified by the user. The + * default target is System.out. + * + * @author Ceki Gülcü + * @author Curt Arnold + * @since 1.1 */ +public class ConsoleAppender extends WriterAppender { + + public static final String SYSTEM_OUT = "System.out"; + public static final String SYSTEM_ERR = "System.err"; + + protected String target = SYSTEM_OUT; + + /** + * Determines if the appender honors reassignments of System.out + * or System.err made after configuration. + */ + private boolean follow = false; + + /** + * Constructs an unconfigured appender. + */ + public ConsoleAppender() { + } + + /** + * Creates a configured appender. + * + * @param layout layout, may not be null. + */ + public ConsoleAppender(Layout layout) { + this(layout, SYSTEM_OUT); + } + + /** + * Creates a configured appender. + * @param layout layout, may not be null. + * @param target target, either "System.err" or "System.out". + */ + public ConsoleAppender(Layout layout, String target) { + setLayout(layout); + setTarget(target); + activateOptions(); + } + + /** + * Sets the value of the Target option. Recognized values + * are "System.out" and "System.err". Any other value will be + * ignored. + * */ + public + void setTarget(String value) { + String v = value.trim(); + + if (SYSTEM_OUT.equalsIgnoreCase(v)) { + target = SYSTEM_OUT; + } else if (SYSTEM_ERR.equalsIgnoreCase(v)) { + target = SYSTEM_ERR; + } else { + targetWarn(value); + } + } + + /** + * Returns the current value of the Target property. The + * default value of the option is "System.out". + * + * See also {@link #setTarget}. + * */ + public + String getTarget() { + return target; + } + + /** + * Sets whether the appender honors reassignments of System.out + * or System.err made after configuration. + * @param newValue if true, appender will use value of System.out or + * System.err in force at the time when logging events are appended. + * @since 1.2.13 + */ + public final void setFollow(final boolean newValue) { + follow = newValue; + } + + /** + * Gets whether the appender honors reassignments of System.out + * or System.err made after configuration. + * @return true if appender will use value of System.out or + * System.err in force at the time when logging events are appended. + * @since 1.2.13 + */ + public final boolean getFollow() { + return follow; + } + + void targetWarn(String val) { + LogLog.warn("["+val+"] should be System.out or System.err."); + LogLog.warn("Using previously set target, System.out by default."); + } + + /** + * Prepares the appender for use. + */ + public void activateOptions() { + if (follow) { + if (target.equals(SYSTEM_ERR)) { + setWriter(createWriter(new SystemErrStream())); + } else { + setWriter(createWriter(new SystemOutStream())); + } + } else { + if (target.equals(SYSTEM_ERR)) { + setWriter(createWriter(System.err)); + } else { + setWriter(createWriter(System.out)); + } + } + + super.activateOptions(); + } + + /** + * {@inheritDoc} + */ + protected + final + void closeWriter() { + if (follow) { + super.closeWriter(); + } + } + + + /** + * An implementation of OutputStream that redirects to the + * current System.err. + * + */ + private static class SystemErrStream extends OutputStream { + public SystemErrStream() { + } + + public void close() { + } + + public void flush() { + System.err.flush(); + } + + public void write(final byte[] b) throws IOException { + System.err.write(b); + } + + public void write(final byte[] b, final int off, final int len) + throws IOException { + System.err.write(b, off, len); + } + + public void write(final int b) throws IOException { + System.err.write(b); + } + } + + /** + * An implementation of OutputStream that redirects to the + * current System.out. + * + */ + private static class SystemOutStream extends OutputStream { + public SystemOutStream() { + } + + public void close() { + } + + public void flush() { + System.out.flush(); + } + + public void write(final byte[] b) throws IOException { + System.out.write(b); + } + + public void write(final byte[] b, final int off, final int len) + throws IOException { + System.out.write(b, off, len); + } + + public void write(final int b) throws IOException { + System.out.write(b); + } + } + +}